subject:(diagnostic)

University of Hong Kong

1. Chang, Yiu-chuen. Super resolution technique and its potential usage in medical imaging.

Degree: Master of Medical Sciences, 2014, University of Hong Kong

URL: Chang, Y. [張耀泉]. (2014). Super resolution technique and its potential usage in medical imaging. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b5204647 ; http://dx.doi.org/10.5353/th_b5204647 ; http://hdl.handle.net/10722/198844

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Purpose: Medical imaging systems are used to scan patients to obtain valuable information for diseases diagnosis and assisting treatment. An ideal scanner should be sensitive… (more)

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Purpose: Medical imaging systems are used to scan patients to obtain valuable information for diseases diagnosis and assisting treatment. An ideal scanner should be sensitive enough to detect any trace amount of abnormal tissue at its early stage. With the continuous development of high-tech treatment systems such as Tomotherapy (manufactured by Tomo HD), the high-resolution imaging system is favorable to reduce the damage of normal tissue due to the image guidance of Mega-voltage beam before treatment. In this study, a software approach was presented to improve image resolution without hardware upgrade of a scanner. Methodology A programming technique “Super Resolution Technique” was used and demonstrated in an example of CT. It utilized several similar images with known relative shifts between them. (They can be positional or angular shifted and taken at the same time frame as far as possible). Those images are of low resolution and can be reconstructed to form a higher resolution image. A Super Resolution program was written by MATLAB to prove the method. The experiments 1 to 4 were purely computer-based simulations and experiment 5 used a LightSpeed VCT scanner for real scans. For the computer-based experiments, a few low resolution images have been attempted and registration steps were explored for image reconstruction. A resolution target, USAF1951, was called from MATLAB and used to examine the resolving power before and after image processing based on Super Resolution algorithm. Image-image subtraction was used to compare pre-processing and post-processing images. The number of non-zero pixels was used to access the percentage of similarity. For the experiment using LightSpeed VCT scanner, a GE VCT QA phantom was used to test the performance of the technique. Result From the experiments using USAF1951, it was found that: the minimum resolvable line pairs had improved from family -1 element 6 to family 0 element 2 (2 elements improvement) after applying “Super Resolution Technique” as shown in the experiment 1. An xy directional shifting of the pre-processing images resulted in a better reconstructed image than x-axis shifting or y-axis shifting in terms of resolution, shown in the experiment 2. The experiment 3 concluded that the more the pre-processing images, the better the reconstructed image would be. The experiment 4 showed that the shifts of pre-processing images greater than the detector size could still result in a higher resolution image. The experiment 5 revealed that applying “Super Resolution Technique” to a real CT scanner could not give an obvious improvement in resolution, but the image background noise had reduced. Conclusion It was concluded that the “Super Resolution Technique” could improve the image resolution and reduce the background noise at expense of more imaging time and more dose from the additional view. In case of hardware upgrade of imaging device is not practicable, Super Resolution could help improve the image quality.

published_or_final_version

Medical…

Subjects/Keywords: Diagnostic imaging

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APA (6^th Edition):

Chang, Y. (2014). Super resolution technique and its potential usage in medical imaging. (Masters Thesis). University of Hong Kong. Retrieved from Chang, Y. [張耀泉]. (2014). Super resolution technique and its potential usage in medical imaging. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b5204647 ; http://dx.doi.org/10.5353/th_b5204647 ; http://hdl.handle.net/10722/198844

Chicago Manual of Style (16^th Edition):

Chang, Yiu-chuen. “Super resolution technique and its potential usage in medical imaging.” 2014. Masters Thesis, University of Hong Kong. Accessed September 19, 2019. Chang, Y. [張耀泉]. (2014). Super resolution technique and its potential usage in medical imaging. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b5204647 ; http://dx.doi.org/10.5353/th_b5204647 ; http://hdl.handle.net/10722/198844.

MLA Handbook (7^th Edition):

Chang, Yiu-chuen. “Super resolution technique and its potential usage in medical imaging.” 2014. Web. 19 Sep 2019.

Vancouver:

Chang Y. Super resolution technique and its potential usage in medical imaging. [Internet] [Masters thesis]. University of Hong Kong; 2014. [cited 2019 Sep 19]. Available from: Chang, Y. [張耀泉]. (2014). Super resolution technique and its potential usage in medical imaging. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b5204647 ; http://dx.doi.org/10.5353/th_b5204647 ; http://hdl.handle.net/10722/198844.

Council of Science Editors:

Chang Y. Super resolution technique and its potential usage in medical imaging. [Masters Thesis]. University of Hong Kong; 2014. Available from: Chang, Y. [張耀泉]. (2014). Super resolution technique and its potential usage in medical imaging. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b5204647 ; http://dx.doi.org/10.5353/th_b5204647 ; http://hdl.handle.net/10722/198844

University of Cape Town

2. Nair, Tamiya. The risks of medical imaging: a survey of doctors' knowledge and consenting practice.

Degree: MMed, Division of Radiology, 2018, University of Cape Town

URL: http://hdl.handle.net/11427/29708

► Background: Diagnostic imaging forms an integral part of patient evaluation and its use has increased dramatically. Not only is medical imaging a source of increased… (more)

▼ Background: Diagnostic imaging forms an integral part of patient evaluation and its use has increased dramatically. Not only is medical imaging a source of increased radiation dose, but also poses other risks such as those related to the procedure performed, the contrast and drugs administered, acoustic and heat deposition and para-magnetic risks. While many studies have assessed doctors' knowledge of radiation risk, data regarding doctors' knowledge of the remaining risks of medical imaging and doctors' attitudes toward consenting practice for imaging is lacking. Aim: To survey and compare the levels of knowledge between referring clinicians and radiologists regarding the risks to patients undergoing medical imaging and to explore doctors' attitudes toward consenting practice. Method: A cross sectional, observational, descriptive study design was employed. The study was conducted using a non-validated, piloted, self-administered three-page questionnaire. The questionnaire was distributed to doctors in various stages of their medical careers at a tertiary level hospital. The questionnaire was constructed in sections including demographics, risks of medical imaging and consent practice. The maximum score potentially attainable was 79, with a point given for each correct answer. No points were given for incorrect, unsure or blank responses. Results: A total of 431 questionnaires were distributed but only 85 doctors (19 radiologists and 66 clinicians) returned a completed survey, yielding a response rate of 19,7%. Older respondents with more years of experience had greater levels of knowledge regarding the risks of medical imaging. There were no significant differences according to gender or university. Although the levels of knowledge of risk was poor overall, radiologists had greater levels of knowledge (mean knowledge score expressed as a percentage =79% compared to that of clinicians= 71%). The largest proportion of doctors' (49%) were of the opinion that clinicians should be responsible for obtaining consent for medical imaging. Only 18% of doctors (radiologists and clinicians) and 5% of clinicians admitted to feeling adequately prepared to obtain consent for medical imaging. Conclusion: We successfully surveyed and compared the levels of knowledge of medical imaging risks amongst doctors and determined their attitudes toward responsibility for consent. The levels of knowledge of the risks of medical imaging is inadequate among radiologists and poor amongst non-radiologists. While statutory body guidelines recommend that the performing health care provider obtain consent, there remains varying opinion as to who should obtain consent. The largest proportion of doctors' were of the opinion that clinicians should obtain consent for medical imaging - this despite clinicians' feelings of inadequacy when consenting patients to the risks of imaging. It is therefore important to take into consideration the levels of knowledge and comfort when making decisions as to who is best suited to obtain consent for medical imaging.… Advisors/Committee Members: Andronikou, Savvas (advisor).

Subjects/Keywords: Diagnostic Radiology

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Nair, T. (2018). The risks of medical imaging: a survey of doctors' knowledge and consenting practice. (Thesis). University of Cape Town. Retrieved from http://hdl.handle.net/11427/29708

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Nair, Tamiya. “The risks of medical imaging: a survey of doctors' knowledge and consenting practice.” 2018. Thesis, University of Cape Town. Accessed September 19, 2019. http://hdl.handle.net/11427/29708.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Nair, Tamiya. “The risks of medical imaging: a survey of doctors' knowledge and consenting practice.” 2018. Web. 19 Sep 2019.

Vancouver:

Nair T. The risks of medical imaging: a survey of doctors' knowledge and consenting practice. [Internet] [Thesis]. University of Cape Town; 2018. [cited 2019 Sep 19]. Available from: http://hdl.handle.net/11427/29708.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Nair T. The risks of medical imaging: a survey of doctors' knowledge and consenting practice. [Thesis]. University of Cape Town; 2018. Available from: http://hdl.handle.net/11427/29708

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Cape Town

3. Richter-Joubert, Lisel. Assessment of airway compression on chest radiographs in children with pulmonary tuberculosis.

Degree: MMed, Division of Radiology, 2018, University of Cape Town

URL: http://hdl.handle.net/11427/29690

► Study rationale: Diagnosis of pulmonary tuberculosis (PTB) in children relies heavily on chest radiography as sputum samples are difficult to obtain and only yield positive… (more)

▼ Study rationale: Diagnosis of pulmonary tuberculosis (PTB) in children relies heavily on chest radiography as sputum samples are difficult to obtain and only yield positive results in 30-74% of children treated for PTB. However, radiological signs between lower respiratory tract infections (LRTI) and PTB overlap considerably and there is a wide inter-observer agreement in the detection of lymphadenopathy, considered the hallmark of PTB. Small pliable paediatric airways are easily compressed by enlarged lymph nodes. Unlike lymph nodes, however, the lucent airways contrast against the surrounding mediastinal structures on radiographs, thus airway compression may serve as a more objective criterion for diagnosing PTB. Many studies have reviewed the radiographic features of PTB in children but few included airway compression or used a control group and none have evaluated inter-observer agreement. Objective: To investigate frequency and inter-observer agreement of airway compression on chest radiographs in children with PTB compared to those with another LRTI. Methods: Chest radiographs of children admitted to Red Cross War Memorial Children’s Hospital with suspected PTB were read by two readers according to a standardised format and a 3rd when there was disagreement. Radiographs of children with definite PTB were compared to those with another LRTI. Frequency and location of airway compression were evaluated. Findings were correlated with human immunodeficiency virus (HIV) infection and age. Inter-observer agreement was assessed using kappa statistic. Results: Radiographs of 505 children (median age 25.9 months [IQR 14.3-62.2]) were reviewed; 97/505 (19%) children were HIV-infected. Airway compression occurred in 54/188 (28.7%) definite PTB cases versus 24/317 (7.6 %) of other LRTI cases (OR 4.9; 95%CI 2.9–8.3). The left main bronchus was most affected in 51/493 (10.3%). A higher frequency of airway compression occurred in infants at 22/101 (21.8%) compared to 56/404 (13.9%) in older children (OR 1.7; 95%CI 1.00–3.00). No association between airway compression and HIV infection was found. Inter-observer agreement ranged from none to fair (kappa of 0.0-0.4). Discussion: The overall frequency of airway compression in definite PTB is compatible with reports in the literature. Although airway compression used alone is not a specific sign, if seen on radiographs, there is a strong correlation with PTB compared to other LRTI with infants at higher risk due to their smaller airways. Contradictory to other studies, our study showed the left main bronchus to be affected twice more commonly than the bronchus intermedius in both age groups. This is thought to be due to different patient selection. Confirming reports in the literature, no significant association between airway compression and HIV status was found. A disappointing finding was the poor inter-observer agreement. Contributing aspects include the lack of standardised criteria in the definition of airway compression and suboptimal visualisation of the airways on standard…

Subjects/Keywords: Diagnostic Radiology

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APA (6^th Edition):

Richter-Joubert, L. (2018). Assessment of airway compression on chest radiographs in children with pulmonary tuberculosis. (Thesis). University of Cape Town. Retrieved from http://hdl.handle.net/11427/29690

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Richter-Joubert, Lisel. “Assessment of airway compression on chest radiographs in children with pulmonary tuberculosis.” 2018. Thesis, University of Cape Town. Accessed September 19, 2019. http://hdl.handle.net/11427/29690.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Richter-Joubert, Lisel. “Assessment of airway compression on chest radiographs in children with pulmonary tuberculosis.” 2018. Web. 19 Sep 2019.

Vancouver:

Richter-Joubert L. Assessment of airway compression on chest radiographs in children with pulmonary tuberculosis. [Internet] [Thesis]. University of Cape Town; 2018. [cited 2019 Sep 19]. Available from: http://hdl.handle.net/11427/29690.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Richter-Joubert L. Assessment of airway compression on chest radiographs in children with pulmonary tuberculosis. [Thesis]. University of Cape Town; 2018. Available from: http://hdl.handle.net/11427/29690

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Cape Town

4. Raubenheimer, Lauren. Corpus callosum morphology in children on mid-sagittal MR imaging.

Degree: MMed, Division of Radiology, 2018, University of Cape Town

URL: http://hdl.handle.net/11427/29692

► Background: There is little published research on the wide variation of corpus callosum (CC) morphology in children, the assessment of which is made difficult by… (more)

Subjects/Keywords: Diagnostic Radiology

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APA (6^th Edition):

Raubenheimer, L. (2018). Corpus callosum morphology in children on mid-sagittal MR imaging. (Thesis). University of Cape Town. Retrieved from http://hdl.handle.net/11427/29692

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Raubenheimer, Lauren. “Corpus callosum morphology in children on mid-sagittal MR imaging.” 2018. Thesis, University of Cape Town. Accessed September 19, 2019. http://hdl.handle.net/11427/29692.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Raubenheimer, Lauren. “Corpus callosum morphology in children on mid-sagittal MR imaging.” 2018. Web. 19 Sep 2019.

Vancouver:

Raubenheimer L. Corpus callosum morphology in children on mid-sagittal MR imaging. [Internet] [Thesis]. University of Cape Town; 2018. [cited 2019 Sep 19]. Available from: http://hdl.handle.net/11427/29692.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Raubenheimer L. Corpus callosum morphology in children on mid-sagittal MR imaging. [Thesis]. University of Cape Town; 2018. Available from: http://hdl.handle.net/11427/29692

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

KTH

5. Malakhatka, Elena. Diagnostics of valves on the gas pipeline.

Degree: Heat and Power Technology, 2012, KTH

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-101377

► The work of the gas transmission pipeline system is regulated by the thousands of valveses and other elements of the shut-off valves, located in… (more)

Subjects/Keywords: valves; diagnostic

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APA (6^th Edition):

Malakhatka, E. (2012). Diagnostics of valves on the gas pipeline. (Thesis). KTH. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-101377

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Malakhatka, Elena. “Diagnostics of valves on the gas pipeline.” 2012. Thesis, KTH. Accessed September 19, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-101377.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Malakhatka, Elena. “Diagnostics of valves on the gas pipeline.” 2012. Web. 19 Sep 2019.

Vancouver:

Malakhatka E. Diagnostics of valves on the gas pipeline. [Internet] [Thesis]. KTH; 2012. [cited 2019 Sep 19]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-101377.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Malakhatka E. Diagnostics of valves on the gas pipeline. [Thesis]. KTH; 2012. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-101377

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Cape Town

6. Ho-Yee, Ruschka. Evaluation of the utility of specific CXR features for diagnosis of pulmonary tuberculosis in young children using multiple readers.

Degree: Image, Division of Radiology, 2015, University of Cape Town

URL: http://hdl.handle.net/11427/16594

► INTRODUCTION: The diagnosis of childhood pulmonary tuberculosis (TB) can be notoriously difficult. The chest X-ray (CXR) is a significant diagnostic resource in the detection of… (more)

▼ INTRODUCTION: The diagnosis of childhood pulmonary tuberculosis (TB) can be notoriously difficult. The chest X-ray (CXR) is a significant diagnostic resource in the detection of PTB in children. However, non-specific radiological features combined with variable inter-observer assessment s contribute to diagnostic uncertainty. The CXR would be of most value when used specifically to evaluate those features of childhood TB that it shows best and where expert observers agree, namely those signs indicating lymphadenopathy. AIM: To identify simple and reliable CXR features of primary TB in children by determining signs and anatomical sites of best observer agreement. METHOD: This is a retrospective descriptive study within a clinical trial performed by the South African TB Vaccine Initiative (SATVI). Healthy BCG-vaccinated newborn infants in a high TB prevalence rural area in Worcester, near Cape Town, South Africa, were followed for a minimum of two years for possible incident al pulmonary TB. Three independent, blinded, expert paediatric radiologists reported the resultant CXR images using a standardised data collection tick sheet, on which the specific anatomical sites and signs of pathology consistent with pulmonary TB were recorded. The first 200 original data collection tick sheets were sampled and recorded in a pre-compiled data spreadsheet for our study. The sampled data were t hen analysed using kappa statistics. RESULTS: The overall combined agreement for airway compression (by presumed lymphadenopathy) was 0.5%. Five % of the CXR's had soft tissue densities reflecting lymphadenopathy on the frontal view and 5% on the lateral view. The most common site reflecting lymphadenopathy through airway narrowing or displacement was the left main bronchus. The hilar region (kappa 0.27) on the frontal CXR and behind bronchus intermedius (kappa 0.18) on the lateral were the most common sites of soft tissue densities reflecting lymphadenopathy. There were no positive findings for cavitation or pleural effusion. The overall decisions reflecting PTB (lymphadenopathy or miliary) by each individual reader were 27.6% by Reader 1, 8.5% by Reader 2 and 24.6 % by Reader 3. Abnormal findings not specific for PTB were found in 3.5 % by Reader 1, 10.5% by Reader 2 and 3.5% by Reader 3.68. 3 % of the radiographs were reported as normal by Reader 1, 81.9% by Reader 2 and 66.8 % by Reader 3. Only 5% of the radiographs were found to be unreadable by one reader. The overall agreement of all three readers on PTB was 14.6 % and for normal CXR 49.2%. CONCLUSIONS: The fair degree of agreement amongst expert readers suggests that the CXR alone is not a reliable tool for detecting pulmonary TB and should be utilised in conjunction with the clinical features and/or skin tests and blood results. Soft tissue masses rather than airway compression are a more reliable sign for lymphadenopathy, with the most agreed upon sites on the frontal projection for soft tissue mass detection being the right hilar region, followed by the left hilum. Unfortunately,… Advisors/Committee Members: Andronikou, Savvas (advisor), Beningfield, Stephen J (advisor), Hatherill, Mark (advisor).

Subjects/Keywords: Diagnostic Radiology

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ho-Yee, R. (2015). Evaluation of the utility of specific CXR features for diagnosis of pulmonary tuberculosis in young children using multiple readers. (Thesis). University of Cape Town. Retrieved from http://hdl.handle.net/11427/16594

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ho-Yee, Ruschka. “Evaluation of the utility of specific CXR features for diagnosis of pulmonary tuberculosis in young children using multiple readers.” 2015. Thesis, University of Cape Town. Accessed September 19, 2019. http://hdl.handle.net/11427/16594.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ho-Yee, Ruschka. “Evaluation of the utility of specific CXR features for diagnosis of pulmonary tuberculosis in young children using multiple readers.” 2015. Web. 19 Sep 2019.

Vancouver:

Ho-Yee R. Evaluation of the utility of specific CXR features for diagnosis of pulmonary tuberculosis in young children using multiple readers. [Internet] [Thesis]. University of Cape Town; 2015. [cited 2019 Sep 19]. Available from: http://hdl.handle.net/11427/16594.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ho-Yee R. Evaluation of the utility of specific CXR features for diagnosis of pulmonary tuberculosis in young children using multiple readers. [Thesis]. University of Cape Town; 2015. Available from: http://hdl.handle.net/11427/16594

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Cape Town

7. Davis, Razaan. Radiological features of psoriatic arthritis.

Degree: Image, Division of Radiology, 2011, University of Cape Town

URL: http://hdl.handle.net/11427/10338

► Psoriatic arthritis (PsA) is an inflammatory arthritis associated with psoriasis. Psoriasis is a dermatological condition that affects 1-2% of the population. Approximately 10-15% of patients… (more)

Subjects/Keywords: Diagnostic Radiology

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APA (6^th Edition):

Davis, R. (2011). Radiological features of psoriatic arthritis. (Thesis). University of Cape Town. Retrieved from http://hdl.handle.net/11427/10338

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Davis, Razaan. “Radiological features of psoriatic arthritis.” 2011. Thesis, University of Cape Town. Accessed September 19, 2019. http://hdl.handle.net/11427/10338.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Davis, Razaan. “Radiological features of psoriatic arthritis.” 2011. Web. 19 Sep 2019.

Vancouver:

Davis R. Radiological features of psoriatic arthritis. [Internet] [Thesis]. University of Cape Town; 2011. [cited 2019 Sep 19]. Available from: http://hdl.handle.net/11427/10338.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Davis R. Radiological features of psoriatic arthritis. [Thesis]. University of Cape Town; 2011. Available from: http://hdl.handle.net/11427/10338

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Cape Town

8. Scholtz, Paul Victor John. A retrospective study of CT angiography versus digital subtraction angiography in penetrating neck trauma.

Degree: Image, Division of Radiology, 2013, University of Cape Town

URL: http://hdl.handle.net/11427/2851

► BACKGROUND. Penetrating neck trauma is commonly encountered in South African trauma units, and is associated with high mortality and morbidity rates. The imaging protocol for… (more)

Subjects/Keywords: Diagnostic Radiology

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APA (6^th Edition):

Scholtz, P. V. J. (2013). A retrospective study of CT angiography versus digital subtraction angiography in penetrating neck trauma. (Thesis). University of Cape Town. Retrieved from http://hdl.handle.net/11427/2851

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Scholtz, Paul Victor John. “A retrospective study of CT angiography versus digital subtraction angiography in penetrating neck trauma.” 2013. Thesis, University of Cape Town. Accessed September 19, 2019. http://hdl.handle.net/11427/2851.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Scholtz, Paul Victor John. “A retrospective study of CT angiography versus digital subtraction angiography in penetrating neck trauma.” 2013. Web. 19 Sep 2019.

Vancouver:

Scholtz PVJ. A retrospective study of CT angiography versus digital subtraction angiography in penetrating neck trauma. [Internet] [Thesis]. University of Cape Town; 2013. [cited 2019 Sep 19]. Available from: http://hdl.handle.net/11427/2851.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Scholtz PVJ. A retrospective study of CT angiography versus digital subtraction angiography in penetrating neck trauma. [Thesis]. University of Cape Town; 2013. Available from: http://hdl.handle.net/11427/2851

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Cape Town

9. Lawson, Andrew James. Imaging displacement and strain in the medial gastrocnemius muscle during ankle-joint motion using 2D-ciné DENSE MRI.

Degree: Image, Division of Radiology, 2011, University of Cape Town

URL: http://hdl.handle.net/11427/11758

► Skeletal muscle structure has been defined on both macro and microscopic levels by gross dissection, light- and electron-microscopy. The basic physiological building blocks involve the… (more)

Subjects/Keywords: Diagnostic Radiology

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APA (6^th Edition):

Lawson, A. J. (2011). Imaging displacement and strain in the medial gastrocnemius muscle during ankle-joint motion using 2D-ciné DENSE MRI. (Thesis). University of Cape Town. Retrieved from http://hdl.handle.net/11427/11758

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Lawson, Andrew James. “Imaging displacement and strain in the medial gastrocnemius muscle during ankle-joint motion using 2D-ciné DENSE MRI.” 2011. Thesis, University of Cape Town. Accessed September 19, 2019. http://hdl.handle.net/11427/11758.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lawson, Andrew James. “Imaging displacement and strain in the medial gastrocnemius muscle during ankle-joint motion using 2D-ciné DENSE MRI.” 2011. Web. 19 Sep 2019.

Vancouver:

Lawson AJ. Imaging displacement and strain in the medial gastrocnemius muscle during ankle-joint motion using 2D-ciné DENSE MRI. [Internet] [Thesis]. University of Cape Town; 2011. [cited 2019 Sep 19]. Available from: http://hdl.handle.net/11427/11758.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Lawson AJ. Imaging displacement and strain in the medial gastrocnemius muscle during ankle-joint motion using 2D-ciné DENSE MRI. [Thesis]. University of Cape Town; 2011. Available from: http://hdl.handle.net/11427/11758

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Cape Town

10. De Vos, Hendrik Johannes. Radiation dose optimization in interventional radiology and cardiology using diagnostic reference levels.

Degree: Image, Division of Medical Physics, 2016, University of Cape Town

URL: http://hdl.handle.net/11427/20928

► The International Commission of Radiological Protection (ICRP) advises that in principle Diagnostic Reference Levels (DRL) could be used in fluoroscopically guided interventional procedures to avoid… (more)

Subjects/Keywords: Diagnostic Radiology

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APA (6^th Edition):

De Vos, H. J. (2016). Radiation dose optimization in interventional radiology and cardiology using diagnostic reference levels. (Thesis). University of Cape Town. Retrieved from http://hdl.handle.net/11427/20928

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

De Vos, Hendrik Johannes. “Radiation dose optimization in interventional radiology and cardiology using diagnostic reference levels.” 2016. Thesis, University of Cape Town. Accessed September 19, 2019. http://hdl.handle.net/11427/20928.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

De Vos, Hendrik Johannes. “Radiation dose optimization in interventional radiology and cardiology using diagnostic reference levels.” 2016. Web. 19 Sep 2019.

Vancouver:

De Vos HJ. Radiation dose optimization in interventional radiology and cardiology using diagnostic reference levels. [Internet] [Thesis]. University of Cape Town; 2016. [cited 2019 Sep 19]. Available from: http://hdl.handle.net/11427/20928.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

De Vos HJ. Radiation dose optimization in interventional radiology and cardiology using diagnostic reference levels. [Thesis]. University of Cape Town; 2016. Available from: http://hdl.handle.net/11427/20928

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Missouri – Columbia

11. Caldwell, Charles W. Jr. Peptide nanoconjugates for tissue diagnostics and molecular imaging.

Degree: 2016, University of Missouri – Columbia

URL: http://hdl.handle.net/10355/62515

► The rise of targeted therapy in cancer treatment has created a strong need for characterization of a patient's tumor before receiving treatment. Many effective cancer… (more)

▼ The rise of targeted therapy in cancer treatment has created a strong need for characterization of a patient's tumor before receiving treatment. Many effective cancer drugs are now being targeted to specific proteins present in the tumor, thus only patients who have tumors that express these proteins in appreciable amounts will respond to these kinds of therapy. The most popular method of diagnosing patients is through the practice of immunohistochemistry (IHC), where biopsied patient tissue is subjected to testing for specific protein expression. IHC works by incubating a primary antibody towards the target protein, followed by detection with a secondary antibody containing a reactive enzyme - most commonly, horseradish peroxidase (HRP). IHC procedures are expensive, comprises several steps, involves varying amounts of amplification due to enzyme reactivity, and is only as specific as the primary antibody. Patients receiving treatment using popular drugs targeted at common proteins such as EGFR, c-MET, and PD-L1 have shown varying degrees of responses based on initial IHC diagnosis, even when using FDA-approved diagnostic kits. Due to the discrepancies seen between diagnosis and drug efficacy, we have developed new methods utilizing gold nanoparticles that utilize peptides to target protein biomarkers in human tissues. Peptides which are targeted towards receptors contain only the amino acid sequences which are sufficient for protein binding. Due to their tailored specificity, low cost, scalable production, and ease of modification, peptides can be an attractive method of investigating protein content in human tissues. We investigated the use of peptides combined with imaging agents as diagnostic methods to compare with standard immunohistochemistry procedures. Gold nanorods (GNR) scatter light efficiently in the dark field, and their high surface-area-to-volume ratio allows each nanorod to be coated with many targeting peptides, enhancing specificity of each nanoparticle for the receptor of interest. We first investigated attachment of peptides to GNR that can be used to diagnose common biomarkers EGFR and cMET in tumor tissues. EGFR is one of the most commonly overexpressed proteins in human cancers, and many EGFR-targeted drugs have shown improvement of progression-free survival in patients. During the course of EGFR-targeted treatment it is common that a patient will eventually develop resistance to the EGFR-targeted drugs. One such mechanism is the circumventing of EGFR pathway through upregulation of the c-MET protein on the tumor surface. Once EGFR is internalized and c-MET is the dominant pathway, patients will stop responding to EGFR-targeted drug and the tumor will continue proliferation. There are numerous c-MET drugs on the market for second or third line therapy when resistance occurs with this mechanism, however diagnosis of the c-MET biomarker has become controversial due to poor diagnostic results using the current standard IHC methods. We thus followed up our EGFR diagnostic study by investigating… Advisors/Committee Members: Kannan, Raghuraman (advisor).

Subjects/Keywords: Diagnostic immunohistochemistry

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APA (6^th Edition):

Caldwell, C. W. J. (2016). Peptide nanoconjugates for tissue diagnostics and molecular imaging. (Thesis). University of Missouri – Columbia. Retrieved from http://hdl.handle.net/10355/62515

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Caldwell, Charles W Jr. “Peptide nanoconjugates for tissue diagnostics and molecular imaging.” 2016. Thesis, University of Missouri – Columbia. Accessed September 19, 2019. http://hdl.handle.net/10355/62515.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Caldwell, Charles W Jr. “Peptide nanoconjugates for tissue diagnostics and molecular imaging.” 2016. Web. 19 Sep 2019.

Vancouver:

Caldwell CWJ. Peptide nanoconjugates for tissue diagnostics and molecular imaging. [Internet] [Thesis]. University of Missouri – Columbia; 2016. [cited 2019 Sep 19]. Available from: http://hdl.handle.net/10355/62515.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Caldwell CWJ. Peptide nanoconjugates for tissue diagnostics and molecular imaging. [Thesis]. University of Missouri – Columbia; 2016. Available from: http://hdl.handle.net/10355/62515

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

12. Totaro, Kyle A. Development of New Chemical Approaches for Diagnostic Medicine and for Syntheses of Antibacterial Agents.

Degree: PhD, Chemistry, 2014, Brown University

URL: https://repository.library.brown.edu/studio/item/bdr:386279/

► Medicine can be divided into two central components: the diagnosis of a disease and its treatment. Both components of medicine are being transformed by the… (more)

Subjects/Keywords: Diagnostic Medicine

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APA (6^th Edition):

Totaro, K. A. (2014). Development of New Chemical Approaches for Diagnostic Medicine and for Syntheses of Antibacterial Agents. (Doctoral Dissertation). Brown University. Retrieved from https://repository.library.brown.edu/studio/item/bdr:386279/

Chicago Manual of Style (16^th Edition):

Totaro, Kyle A. “Development of New Chemical Approaches for Diagnostic Medicine and for Syntheses of Antibacterial Agents.” 2014. Doctoral Dissertation, Brown University. Accessed September 19, 2019. https://repository.library.brown.edu/studio/item/bdr:386279/.

MLA Handbook (7^th Edition):

Totaro, Kyle A. “Development of New Chemical Approaches for Diagnostic Medicine and for Syntheses of Antibacterial Agents.” 2014. Web. 19 Sep 2019.

Vancouver:

Totaro KA. Development of New Chemical Approaches for Diagnostic Medicine and for Syntheses of Antibacterial Agents. [Internet] [Doctoral dissertation]. Brown University; 2014. [cited 2019 Sep 19]. Available from: https://repository.library.brown.edu/studio/item/bdr:386279/.

Council of Science Editors:

Totaro KA. Development of New Chemical Approaches for Diagnostic Medicine and for Syntheses of Antibacterial Agents. [Doctoral Dissertation]. Brown University; 2014. Available from: https://repository.library.brown.edu/studio/item/bdr:386279/

University of Cape Town

13. Owen, Jeannine Margaret. Value of follow-up CT in head injury assessment.

Degree: Image, Division of Radiology, 2015, University of Cape Town

URL: http://hdl.handle.net/11427/15682

► INTRODUCTION: The question of when and if to perform follow- up CT scanning of the brain in a patient with a proven head injury remains… (more)

▼ INTRODUCTION: The question of when and if to perform follow- up CT scanning of the brain in a patient with a proven head injury remains pertinent, and the answer is not clear cut. This is even more so compounded when one tries to compare and equate what happens in a developed country with that of a developing country such as South Africa. AIM: To evaluate referral patterns, associated time-delays and findings of follow-up CT as well as patient outcomes in patients with head injury at Groote Schuur Hospital. METHOD: A retrospective review, over a 6 month time period, of the CT scans and folders belonging to patients who underwent follow-up CT scanning of the brain after blunt trauma to the head. RESULTS: There were 313 follow-up studies performed in 212 patients, of which the majority, 135 /313 (43.1%) were referred for neurological reasons, whilst 103/313 (32.9%) were referred for conservative management reasons and 75/313 (24%) were referred as part of their post-surgical check-up. There were significant time delays from arrival of patients in casualty to their initial CT scan (mean 18.74 hours) as well as between the initial CT and the first follow-up scan (mean 121.78 hours). There was a significant amount of data missing regarding the time of actual injury for many patients. There were 74 neurosurgical interventions that took place as a result of CT scans performed. Of these, 54 (73%) took place after the initial CT scan, whilst only 20 (27%) occurred after a follow-up CT. Of those surgical interventions performed after a follow- up study, 6 (30%) were performed as a result of a scan performed for post-surgical check- up. 12 (60%) were performed as a result of a scan performed for neurological reasons. Two (10%) neurosurgical interventions occurred as a result of a scan performed for conservative management reasons (thus routine follow-up imaging). CONCLUSIONS: A routine single follow-up CT may be a reasonable approach with further follow-up imaging reserved for patients who have undergone surgery, those with possibly surgically manageable findings on initial CT (that do not undergo surgery) and those with new neurology. The routine use of follow-up CT beyond the first follow-up CT is unlikely to lead to a change in management when the above clinical, and prior CT findings are absent. However, the time delays across all aspects of imaging traumatic brain injuries in our setting are unpredictable and represent a major problem in standardising when CT scans are performed. Advisors/Committee Members: Andronikou, Savvas (advisor).

Subjects/Keywords: Diagnostic Radiology

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APA (6^th Edition):

Owen, J. M. (2015). Value of follow-up CT in head injury assessment. (Thesis). University of Cape Town. Retrieved from http://hdl.handle.net/11427/15682

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Owen, Jeannine Margaret. “Value of follow-up CT in head injury assessment.” 2015. Thesis, University of Cape Town. Accessed September 19, 2019. http://hdl.handle.net/11427/15682.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Owen, Jeannine Margaret. “Value of follow-up CT in head injury assessment.” 2015. Web. 19 Sep 2019.

Vancouver:

Owen JM. Value of follow-up CT in head injury assessment. [Internet] [Thesis]. University of Cape Town; 2015. [cited 2019 Sep 19]. Available from: http://hdl.handle.net/11427/15682.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Owen JM. Value of follow-up CT in head injury assessment. [Thesis]. University of Cape Town; 2015. Available from: http://hdl.handle.net/11427/15682

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Rutgers University

14. He, Jiawei, 1993-. Miniaturized optical scatter imaging microscope in reflectance mode with Fourier filtering for monitoring devices and cells.

Degree: MS, Biomedical Engineering, 2017, Rutgers University

URL: https://rucore.libraries.rutgers.edu/rutgers-lib/55488/

► Optical scatter imaging (OSI), which combines light scattering spectroscopy with microscopic imaging, offers an alternative and efficient way for non-invasive and dynamic study of particle… (more)

▼ Optical scatter imaging (OSI), which combines light scattering spectroscopy with microscopic imaging, offers an alternative and efficient way for non-invasive and dynamic study of particle and cell morphology with high signal throughput in real time. A variable diameter iris as a Fourier spatial filter allows the OSI microscope to generate images that encode the intensity ratio of wide-to-narrow angle scatter (OSIR, optical scatter imaging ratio) at each pixel. One part of this study focused on designing and constructing a miniaturized OSI microscope setup adopting reflectance mode with Fourier filtering based on original OSI setup. Recently, the ZnO nanostructure-modified quartz crystal microbalance (ZnOnano-QCM) biosensor has been receiving increasing attention for its dynamic and noninvasive cellular monitoring properties. The goal in this part of the study is to design an optical imaging modality that can be combined with the ZnOnano-QCM biosensor. The second part of the study is focused on evaluating the performance of this miniaturized OSI microscope setup. Our results demonstrate a compact OSI microscopy system which was build using aspheric lenses, a LED light source, and a low-budget CCD camera. The results show that the microscope aperture of our OSI setup had an NA of 0.55 corresponding to a spatial resolution of 0.6µm, the magnification was 8X, and the field of view was 596 x 446µm. Theoretical simulations of the forward scattered and the backscattered OSIR show that the backscatter OSIR fluctuates more as a function of particle size compared with the forward scatter OSIR which varies monotonically as a function of sphere diameter. When samples were mounted on non-reflective matte black metal slides, the backscattered OSIR of onion cells and microspheres were measured and the experimental data demonstrate that the measured OSIR agrees well with theoretical predictions for microspheres with diameter between 0.7µm and 1.8µm. Onion cell dark-field images on the matte black slides were of good quality and compared well with bright field images collected on a standard phase microscope. However, when samples were mounted on glass or in an aqueous medium with a spatial filter, the acquisition of clear dark-field images of live endothelial cells failed since the spatial filter could not block the specular reflection perfectly. As such, the OSI microscope that was developed provides a proof-of-principle for conducting the OSIR measurement in reflectance mode. However, further improvements are needed to eliminate the background due to specular reflection in samples. Advisors/Committee Members: Boustany, Nada N. (chair), Zahn, Jeffrey D. (internal member), Sy, Jay C. (internal member), School of Graduate Studies.

Subjects/Keywords: Diagnostic imaging

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APA (6^th Edition):

He, Jiawei, 1. (2017). Miniaturized optical scatter imaging microscope in reflectance mode with Fourier filtering for monitoring devices and cells. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/55488/

Chicago Manual of Style (16^th Edition):

He, Jiawei, 1993-. “Miniaturized optical scatter imaging microscope in reflectance mode with Fourier filtering for monitoring devices and cells.” 2017. Masters Thesis, Rutgers University. Accessed September 19, 2019. https://rucore.libraries.rutgers.edu/rutgers-lib/55488/.

MLA Handbook (7^th Edition):

He, Jiawei, 1993-. “Miniaturized optical scatter imaging microscope in reflectance mode with Fourier filtering for monitoring devices and cells.” 2017. Web. 19 Sep 2019.

Vancouver:

He, Jiawei 1. Miniaturized optical scatter imaging microscope in reflectance mode with Fourier filtering for monitoring devices and cells. [Internet] [Masters thesis]. Rutgers University; 2017. [cited 2019 Sep 19]. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/55488/.

Council of Science Editors:

He, Jiawei 1. Miniaturized optical scatter imaging microscope in reflectance mode with Fourier filtering for monitoring devices and cells. [Masters Thesis]. Rutgers University; 2017. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/55488/

Rutgers University

15. Patel, Khushbu Dipak. Assessment of optical transmission and image contrast at infrared wavelengths using tissue simulating phantoms and biological tissues.

Degree: MS, Biomedical Engineering, 2017, Rutgers University

URL: https://rucore.libraries.rutgers.edu/rutgers-lib/55614/

► In vivo fluorescence imaging is an emerging technique with potential for usage in non-invasive cancer screening, surveillance, real-time surgical guidance, and staging. Fluorescence imaging uses… (more)

▼ In vivo fluorescence imaging is an emerging technique with potential for usage in non-invasive cancer screening, surveillance, real-time surgical guidance, and staging. Fluorescence imaging uses the interaction of non-ionizing optical radiation with endogenous fluorophores or fluorescent labels to provide real-time wide-field images of tissue structure and/or functional components. When imaging in vivo, excitation light must travel through overlying tissue to reach the fluorescent target and emitted fluorescence must then propagate back through the overlying tissue in order to be imaged onto a camera. Recently, fluorescent contrast agents have been developed with excitation and emission wavelengths in the near infrared (NIR) spectrum (~700 – 1,000 nm) in order to minimize attenuation and maximize the measured signal from tissue. While several clinical trials have shown the potential benefits of NIR contrast agents over visible fluorophores, there may still be room for improvement by moving to even longer wavelengths. As scattering is reduced as wavelength increases, some researchers are investigating fluorophores that emit in the short-wave infrared (SWIR) wavelength region (~1,000 – 2,300 nm). This study focuses on examining optical transmission and image contrast at NIR wavelengths and SWIR wavelengths to determine which wavelength region may be optimal for development of fluorescent contrast agents. Transmission and contrast measurements were performed on both tissue simulating phantoms and real biological tissues using 780 nm, 980 nm, and 1550 nm wavelengths. From the experiments conducted, it appears that fluorophore emissions should be chosen based on the goals of the specific application. For an application that requires simple detection of signal, near infrared wavelengths will be better as they can be detected with higher signal levels. For an application that focuses on imaging fluorophore-labeled tissues, short-wave infrared wavelengths will be the better option as they provided better image contrast Advisors/Committee Members: Pierce, Mark C. (chair), School of Graduate Studies.

Subjects/Keywords: Diagnostic imaging

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APA (6^th Edition):

Patel, K. D. (2017). Assessment of optical transmission and image contrast at infrared wavelengths using tissue simulating phantoms and biological tissues. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/55614/

Chicago Manual of Style (16^th Edition):

Patel, Khushbu Dipak. “Assessment of optical transmission and image contrast at infrared wavelengths using tissue simulating phantoms and biological tissues.” 2017. Masters Thesis, Rutgers University. Accessed September 19, 2019. https://rucore.libraries.rutgers.edu/rutgers-lib/55614/.

MLA Handbook (7^th Edition):

Patel, Khushbu Dipak. “Assessment of optical transmission and image contrast at infrared wavelengths using tissue simulating phantoms and biological tissues.” 2017. Web. 19 Sep 2019.

Vancouver:

Patel KD. Assessment of optical transmission and image contrast at infrared wavelengths using tissue simulating phantoms and biological tissues. [Internet] [Masters thesis]. Rutgers University; 2017. [cited 2019 Sep 19]. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/55614/.

Council of Science Editors:

Patel KD. Assessment of optical transmission and image contrast at infrared wavelengths using tissue simulating phantoms and biological tissues. [Masters Thesis]. Rutgers University; 2017. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/55614/

16. Baudrillart, Benoit. Etude du procédé de croissance de films de diamant nanocristallin par dépôt chimique en phase vapeur assisté par plasma micro-onde distribué, à basse température et basse pression : Study of nanocrystalline diamond film growth process by distributed antenna array microwave plasma assisted chemical vapor deposition, at low temperature and low pressure.

Degree: Docteur es, Genies des procédés, 2017, Sorbonne Paris Cité

URL: http://www.theses.fr/2017USPCD051

►

Ce travail de thèse porte sur la compréhension et le contrôle du procédé de croissance de films de diamant nanocristallin (DNC) par dépôt chimique en… (more)

▼

Ce travail de thèse porte sur la compréhension et le contrôle du procédé de croissance de films de diamant nanocristallin (DNC) par dépôt chimique en phase vapeur assisté par plasma micro-onde distribué. Deux axes de travail ont été suivis pour atteindre ces objectifs : une étude « matériau » visant à étudier les mécanismes de germination et de croissance et les caractéristiques des films de DNC élaborés ; une étude « plasma » s’intéressant au diagnostic des décharges basse pression H₂ /CH₄/CO₂ utilisées pour la croissance.Concernant le premier volet, des techniques de caractérisation ex situ, telles que la microscopie électronique à balayage, à transmission haute résolution et à force atomique, la spectroscopie Raman, la diffraction des rayons X, la réflectométrie UV-visible, et in situ, telles que l’interférométrie de réflectance laser, ont été mises en oeuvre pour étudier la densité de germination, la morphologie, la topographie, la microstructure, la pureté et la vitesse de croissance des films de DNC. L’influence de certains paramètres du procédé, tels que la pression dans l’enceinte, la position du substrat, la composition gazeuse, la température de surface, la puissance micro-onde et le prétraitement ex situ du substrat, a été étudié pour le silicium. La synthèse de DNC jusqu’à une température aussi basse que 130 °C a ainsi pu être maîtrisée. La faisabilité de la croissance à cette température sur un matériau polymère comme le polytétrafluoroéthylène (PTFE) a été démontrée. La croissance de films de DNC sur d’autres types de substrats tels que le nitrure de silicium et l'acier inoxydable a également été examinée. Concernant la deuxième partie de ce travail, le diagnostic du plasma de dépôt a été effectué par spectroscopie optique d’émission et spectroscopie d'absorption infrarouge en utilisant comme sources de rayonnement des diodes lasers accordables en longueurs d’ondes et des lasers à cascade quantique à cavité externe. L’influence des conditions expérimentales, en particulier de la puissance micro-onde et de la pression dans l’enceinte, sur la concentration du radical méthyl CH₃, précurseur de croissance du diamant, et de cinq molécules stables (CH₄, CO₂, CO, C₂H₂, C₂H₆), ainsi que sur le degré de dissociation de H₂ et les températures cinétiques, vibrationnelles et rotationnelles des espèces, a été étudiée. Le degré de dissociation élevé des précurseurs gazeux, pour une température de gaz relativement faible de quelques centaines de kelvins, indiquent que la chimie du plasma est principalement gouvernée par des processus électroniques. Le système à plasma micro-onde distribué utilisé permet cependant de produire certaines espèces de croissance et de gravure en quantité comparable aux procédés de croissance de DNC conventionnels tout en permettant le processus de synthèse à basse température.

This PhD thesis focuses on the understanding and the control of the nanocrystalline diamond (NCD) film growth process by distributed antenna array microwave plasma-assisted chemical vapor deposition. Two approaches…

Advisors/Committee Members: Achard, Jocelyn (thesis director), Bénédic, Fabien (thesis director).

Subjects/Keywords: Diagnostic in situ; In situ diagnostic

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APA (6^th Edition):

Baudrillart, B. (2017). Etude du procédé de croissance de films de diamant nanocristallin par dépôt chimique en phase vapeur assisté par plasma micro-onde distribué, à basse température et basse pression : Study of nanocrystalline diamond film growth process by distributed antenna array microwave plasma assisted chemical vapor deposition, at low temperature and low pressure. (Doctoral Dissertation). Sorbonne Paris Cité. Retrieved from http://www.theses.fr/2017USPCD051

Chicago Manual of Style (16^th Edition):

Baudrillart, Benoit. “Etude du procédé de croissance de films de diamant nanocristallin par dépôt chimique en phase vapeur assisté par plasma micro-onde distribué, à basse température et basse pression : Study of nanocrystalline diamond film growth process by distributed antenna array microwave plasma assisted chemical vapor deposition, at low temperature and low pressure.” 2017. Doctoral Dissertation, Sorbonne Paris Cité. Accessed September 19, 2019. http://www.theses.fr/2017USPCD051.

MLA Handbook (7^th Edition):

Baudrillart, Benoit. “Etude du procédé de croissance de films de diamant nanocristallin par dépôt chimique en phase vapeur assisté par plasma micro-onde distribué, à basse température et basse pression : Study of nanocrystalline diamond film growth process by distributed antenna array microwave plasma assisted chemical vapor deposition, at low temperature and low pressure.” 2017. Web. 19 Sep 2019.

Vancouver:

Baudrillart B. Etude du procédé de croissance de films de diamant nanocristallin par dépôt chimique en phase vapeur assisté par plasma micro-onde distribué, à basse température et basse pression : Study of nanocrystalline diamond film growth process by distributed antenna array microwave plasma assisted chemical vapor deposition, at low temperature and low pressure. [Internet] [Doctoral dissertation]. Sorbonne Paris Cité; 2017. [cited 2019 Sep 19]. Available from: http://www.theses.fr/2017USPCD051.

Council of Science Editors:

Baudrillart B. Etude du procédé de croissance de films de diamant nanocristallin par dépôt chimique en phase vapeur assisté par plasma micro-onde distribué, à basse température et basse pression : Study of nanocrystalline diamond film growth process by distributed antenna array microwave plasma assisted chemical vapor deposition, at low temperature and low pressure. [Doctoral Dissertation]. Sorbonne Paris Cité; 2017. Available from: http://www.theses.fr/2017USPCD051

University of Georgia

17. Li, Feiming. A modified higher-order DINA model for detecting differential item functioning and differential attribute functioning.

Degree: PhD, Educational Psychology, 2008, University of Georgia

URL: http://purl.galileo.usg.edu/uga_etd/li_feiming_200812_phd

► This dissertation presents a modified higher-order DINA model for separating the source of construct-relevant (i.e., benign) differential item functioning (DIF) from construct irrelevant (i.e., adverse)… (more)

Subjects/Keywords: Cognitive diagnostic assessment

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APA (6^th Edition):

Li, F. (2008). A modified higher-order DINA model for detecting differential item functioning and differential attribute functioning. (Doctoral Dissertation). University of Georgia. Retrieved from http://purl.galileo.usg.edu/uga_etd/li_feiming_200812_phd

Chicago Manual of Style (16^th Edition):

Li, Feiming. “A modified higher-order DINA model for detecting differential item functioning and differential attribute functioning.” 2008. Doctoral Dissertation, University of Georgia. Accessed September 19, 2019. http://purl.galileo.usg.edu/uga_etd/li_feiming_200812_phd.

MLA Handbook (7^th Edition):

Li, Feiming. “A modified higher-order DINA model for detecting differential item functioning and differential attribute functioning.” 2008. Web. 19 Sep 2019.

Vancouver:

Li F. A modified higher-order DINA model for detecting differential item functioning and differential attribute functioning. [Internet] [Doctoral dissertation]. University of Georgia; 2008. [cited 2019 Sep 19]. Available from: http://purl.galileo.usg.edu/uga_etd/li_feiming_200812_phd.

Council of Science Editors:

Li F. A modified higher-order DINA model for detecting differential item functioning and differential attribute functioning. [Doctoral Dissertation]. University of Georgia; 2008. Available from: http://purl.galileo.usg.edu/uga_etd/li_feiming_200812_phd

University of Georgia

18. Bradshaw, Laine Percell. Combining scaling and classification: A psychometric model for scaling ability and diagnosing misconceptions.

Degree: PhD, Educational Psychology, 2011, University of Georgia

URL: http://purl.galileo.usg.edu/uga_etd/bradshaw_laine_p_201105_phd

► The Scaling Individuals and Classifying Misconceptions (SICM) model is presented as a combination of an item response theory (IRT) model and a diagnostic classification model… (more)

Subjects/Keywords: diagnostic classification model

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APA (6^th Edition):

Bradshaw, L. P. (2011). Combining scaling and classification: A psychometric model for scaling ability and diagnosing misconceptions. (Doctoral Dissertation). University of Georgia. Retrieved from http://purl.galileo.usg.edu/uga_etd/bradshaw_laine_p_201105_phd

Chicago Manual of Style (16^th Edition):

Bradshaw, Laine Percell. “Combining scaling and classification: A psychometric model for scaling ability and diagnosing misconceptions.” 2011. Doctoral Dissertation, University of Georgia. Accessed September 19, 2019. http://purl.galileo.usg.edu/uga_etd/bradshaw_laine_p_201105_phd.

MLA Handbook (7^th Edition):

Bradshaw, Laine Percell. “Combining scaling and classification: A psychometric model for scaling ability and diagnosing misconceptions.” 2011. Web. 19 Sep 2019.

Vancouver:

Bradshaw LP. Combining scaling and classification: A psychometric model for scaling ability and diagnosing misconceptions. [Internet] [Doctoral dissertation]. University of Georgia; 2011. [cited 2019 Sep 19]. Available from: http://purl.galileo.usg.edu/uga_etd/bradshaw_laine_p_201105_phd.

Council of Science Editors:

Bradshaw LP. Combining scaling and classification: A psychometric model for scaling ability and diagnosing misconceptions. [Doctoral Dissertation]. University of Georgia; 2011. Available from: http://purl.galileo.usg.edu/uga_etd/bradshaw_laine_p_201105_phd

University of Aberdeen

19. Egbe, Nneoyi Onen. Measurement of dose in diagnostic radiology and the effect of dose reduction on image quality.

Degree: 2008, University of Aberdeen

URL: http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=25469 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.499089

► In computed radiography (CR) images, dose reduction up to 0.10 mGy is possible in chest radiography without image manipulation. A lower dose of 0.06 mGy… (more)

Subjects/Keywords: 615.84; Diagnostic Imaging

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APA (6^th Edition):

Egbe, N. O. (2008). Measurement of dose in diagnostic radiology and the effect of dose reduction on image quality. (Doctoral Dissertation). University of Aberdeen. Retrieved from http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=25469 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.499089

Chicago Manual of Style (16^th Edition):

Egbe, Nneoyi Onen. “Measurement of dose in diagnostic radiology and the effect of dose reduction on image quality.” 2008. Doctoral Dissertation, University of Aberdeen. Accessed September 19, 2019. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=25469 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.499089.

MLA Handbook (7^th Edition):

Egbe, Nneoyi Onen. “Measurement of dose in diagnostic radiology and the effect of dose reduction on image quality.” 2008. Web. 19 Sep 2019.

Vancouver:

Egbe NO. Measurement of dose in diagnostic radiology and the effect of dose reduction on image quality. [Internet] [Doctoral dissertation]. University of Aberdeen; 2008. [cited 2019 Sep 19]. Available from: http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=25469 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.499089.

Council of Science Editors:

Egbe NO. Measurement of dose in diagnostic radiology and the effect of dose reduction on image quality. [Doctoral Dissertation]. University of Aberdeen; 2008. Available from: http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=25469 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.499089

University of Nairobi

20. Terah, Stephen A A. Herbalist Diagnostic Support System: A Prototype .

Degree: 2009, University of Nairobi

URL: http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/23652

► The Herbalist Diagnostic Support System has been built using expert system techniques. Expert Systems are useful in capturing rare knowledge from a human expert into… (more)

Subjects/Keywords: Diagnostic Support System

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APA (6^th Edition):

Terah, S. A. A. (2009). Herbalist Diagnostic Support System: A Prototype . (Thesis). University of Nairobi. Retrieved from http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/23652

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Terah, Stephen A A. “Herbalist Diagnostic Support System: A Prototype .” 2009. Thesis, University of Nairobi. Accessed September 19, 2019. http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/23652.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Terah, Stephen A A. “Herbalist Diagnostic Support System: A Prototype .” 2009. Web. 19 Sep 2019.

Vancouver:

Terah SAA. Herbalist Diagnostic Support System: A Prototype . [Internet] [Thesis]. University of Nairobi; 2009. [cited 2019 Sep 19]. Available from: http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/23652.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Terah SAA. Herbalist Diagnostic Support System: A Prototype . [Thesis]. University of Nairobi; 2009. Available from: http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/23652

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Hong Kong

21. Ho, Lok-yan. Novel selective medium for isolation of bacteroides fragilis from clinical specimens.

Degree: Master of Medical Sciences, 2016, University of Hong Kong

URL: http://hdl.handle.net/10722/239920

►

Background Bacteroides fragilis is an obligate anaerobic Gram-negative bacilli that can be found in abdominal wounds and soft tissue infections. It is often present in… (more)

Subjects/Keywords: Bacteroides; Diagnostic specimens

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APA (6^th Edition):

Ho, L. (2016). Novel selective medium for isolation of bacteroides fragilis from clinical specimens. (Masters Thesis). University of Hong Kong. Retrieved from http://hdl.handle.net/10722/239920

Chicago Manual of Style (16^th Edition):

Ho, Lok-yan. “Novel selective medium for isolation of bacteroides fragilis from clinical specimens.” 2016. Masters Thesis, University of Hong Kong. Accessed September 19, 2019. http://hdl.handle.net/10722/239920.

MLA Handbook (7^th Edition):

Ho, Lok-yan. “Novel selective medium for isolation of bacteroides fragilis from clinical specimens.” 2016. Web. 19 Sep 2019.

Vancouver:

Ho L. Novel selective medium for isolation of bacteroides fragilis from clinical specimens. [Internet] [Masters thesis]. University of Hong Kong; 2016. [cited 2019 Sep 19]. Available from: http://hdl.handle.net/10722/239920.

Council of Science Editors:

Ho L. Novel selective medium for isolation of bacteroides fragilis from clinical specimens. [Masters Thesis]. University of Hong Kong; 2016. Available from: http://hdl.handle.net/10722/239920

22. Touati, Youcef. Diagnostic robuste et estimation de défauts à base de modèle Bond Graph : Robust diagnosis and fault estimation using bond graph approach.

Degree: Docteur es, Automatique et Informatique Industrielle, 2012, Université Lille I – Sciences et Technologies

URL: http://www.theses.fr/2012LIL10100

►

Ce travail de thèse concerne la conception d’un système de diagnostic robuste à base de modèle bond graph et a pour objectif principal de générer… (more)

▼

Ce travail de thèse concerne la conception d’un système de diagnostic robuste à base de modèle bond graph et a pour objectif principal de générer des seuils robustes aux incertitudes de mesures mais aussi la génération systématiques des équations d’estimation de défauts. Une procédure de génération des seuils basée sur une représentation graphiques des incertitudes de mesure a été développée et implémentée sur un système réel. La représentation bond graph sous forme LFT (transformation linéaire fractionnelle) a été exploitée pour la génération des équations d’estimation de défauts qui sont utilisées pour l’amélioration de la décision concernant l’isolabilité de défauts ayant la même signature de pannes ainsi à l’analyse de la sensibilité des résidus aux défauts capteurs, actionneurs et aux défauts liés aux paramètres. Les algorithmes développés dans ce travail de thèse ont été validés par une implémentation sur un système mécatronique représentant un robot mobile, appelé : Robotino.

This work deals with robust bond graph model-based fault diagnosis. The main objectives of this work are related to the generation of robust thresholds with respect to measurement uncertainties, and the creation of a systematic procedure for the generation of fault estimation equations. A procedure of thresholds generation based on a graphical representation of the measurement uncertainty has been developed and implemented on a real system. The Bond graph under LFT (linear fractional transformation) form has been used for the generation of fault estimation equations. These equations are used to improve the decision step concerning the isolation of the faults having the same signature and for analyzing the sensitivity of the residuals to faults affecting sensors, actuators and parameters. The algorithms developed in this work have been on a mechatronic system representing a mobile robot, called: Robotino.

Advisors/Committee Members: Ould Bouamama, Belkacem (thesis director), Merzouki, Rochdi (thesis director).

Subjects/Keywords: Diagnostic robuste; 629.895

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APA (6^th Edition):

Touati, Y. (2012). Diagnostic robuste et estimation de défauts à base de modèle Bond Graph : Robust diagnosis and fault estimation using bond graph approach. (Doctoral Dissertation). Université Lille I – Sciences et Technologies. Retrieved from http://www.theses.fr/2012LIL10100

Chicago Manual of Style (16^th Edition):

Touati, Youcef. “Diagnostic robuste et estimation de défauts à base de modèle Bond Graph : Robust diagnosis and fault estimation using bond graph approach.” 2012. Doctoral Dissertation, Université Lille I – Sciences et Technologies. Accessed September 19, 2019. http://www.theses.fr/2012LIL10100.

MLA Handbook (7^th Edition):

Touati, Youcef. “Diagnostic robuste et estimation de défauts à base de modèle Bond Graph : Robust diagnosis and fault estimation using bond graph approach.” 2012. Web. 19 Sep 2019.

Vancouver:

Touati Y. Diagnostic robuste et estimation de défauts à base de modèle Bond Graph : Robust diagnosis and fault estimation using bond graph approach. [Internet] [Doctoral dissertation]. Université Lille I – Sciences et Technologies; 2012. [cited 2019 Sep 19]. Available from: http://www.theses.fr/2012LIL10100.

Council of Science Editors:

Touati Y. Diagnostic robuste et estimation de défauts à base de modèle Bond Graph : Robust diagnosis and fault estimation using bond graph approach. [Doctoral Dissertation]. Université Lille I – Sciences et Technologies; 2012. Available from: http://www.theses.fr/2012LIL10100

23. Bressel, Mathieu. Modélisation raphique pour le pronostic robuste de pile à combustible à membrane échangeuse de proton : Graphical modeling for robust prognostic of proton exchange membrane fuel cell.

Degree: Docteur es, Automatique, Génie Informatique, Traitement du Signal et des Images, 2016, Université Lille I – Sciences et Technologies

URL: http://www.theses.fr/2016LIL10119

►

La pile à combustible (PàC) est actuellement la solution alternative aux énergies fossiles la plus prometteuse. Il convient cependant d’améliorer sa fiabilité. Cela nécessite la… (more)

▼

La pile à combustible (PàC) est actuellement la solution alternative aux énergies fossiles la plus prometteuse. Il convient cependant d’améliorer sa fiabilité. Cela nécessite la mise en place d’algorithmes capables d’estimer en temps réel l´état de santé de son fonctionnement et de prédire sa durée de vie résiduelle. Les méthodes de pronostic basées sur un modèle physique offrent des résultats précis car ne nécessitent ni apprentissage de modes de fonctionnement ni expertise de l’opérateur. Toutefois, la problématique pour un système PàC réside dans le couplage de plusieurs phénomènes physique, l’incertitude des paramètres du modèle et la faible instrumentation du cœur de pile. Ainsi, nous utilisons des modèles incertains basés sur l’outil Bond Graph bien adapté pour la PàC. Concrètement, les incertitudes sont intégrées au modèle d´évolution des puissances qui est utilisé pour la détection du vieillissement et l’estimation de la dégradation de la PàC. Un modèle de dégradation est utilisé par un filtre de Kalman étendu pour l’estimation de l’état de santé, de la dynamique du vieillissement et permet de quantifier l’incertitude pour toute condition opératoire. Un algorithme Inverse First Order Reliability Method permet ensuite la prédiction de la durée de vie résiduelle et de l’incertitude de prédiction inhérente. La méthode globale a été validée sur différents jeux de données expérimentales. Grâce à l’ensemble de ces outils, un contrôle par inversion de modèle REM (Représentation Energétique Macroscopique) à paramètres variant, robuste au vieillissement a été développé en se basant sur l’estimation de l’état de santé.

The fuel cell (FC) is at present the alternative solution to the fossil fuels the most promising. It is however advisable to improve its reliability. This requires the implementation of algorithms capable of estimating in real time the state of health and forecasting its remaining useful life (prognostics). The methods of prognostics based on a physical model offer precise results once they do not requiring either learning or expertise of the operator. However, the problem for a FC system lies in the coupling of several physical phenomena, the uncertainty of the parameters of the model and the low instrumentation of the FC stack.Thus, we use uncertain models based on the Bond Graph tool well adapted for the FC. Concretely, the parameters uncertainties are integrated in the model of evolution of the powers which is used for the detection of the beginning of the aging and the estimation of the degradation of the FC based on the causal and structural properties of the model. The generated model of degradation is used by an extended Kalman filter which allows the estimation of the state of health , the dynamics of the aging and the quantification of the uncertainty for any operating condition (of temperature, current and pressure). An Inverse First Order Reliability Method is then used for the prediction of the remaining useful life and the inherent uncertainty. The global method was validated on various…

Advisors/Committee Members: Ould Bouamama, Belkacem (thesis director), Hissel, Daniel (thesis director), Hilairet, Mickaël (thesis director).

Subjects/Keywords: Diagnostic; Pronostic; 629.895

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Bressel, M. (2016). Modélisation raphique pour le pronostic robuste de pile à combustible à membrane échangeuse de proton : Graphical modeling for robust prognostic of proton exchange membrane fuel cell. (Doctoral Dissertation). Université Lille I – Sciences et Technologies. Retrieved from http://www.theses.fr/2016LIL10119

Chicago Manual of Style (16^th Edition):

Bressel, Mathieu. “Modélisation raphique pour le pronostic robuste de pile à combustible à membrane échangeuse de proton : Graphical modeling for robust prognostic of proton exchange membrane fuel cell.” 2016. Doctoral Dissertation, Université Lille I – Sciences et Technologies. Accessed September 19, 2019. http://www.theses.fr/2016LIL10119.

MLA Handbook (7^th Edition):

Bressel, Mathieu. “Modélisation raphique pour le pronostic robuste de pile à combustible à membrane échangeuse de proton : Graphical modeling for robust prognostic of proton exchange membrane fuel cell.” 2016. Web. 19 Sep 2019.

Vancouver:

Bressel M. Modélisation raphique pour le pronostic robuste de pile à combustible à membrane échangeuse de proton : Graphical modeling for robust prognostic of proton exchange membrane fuel cell. [Internet] [Doctoral dissertation]. Université Lille I – Sciences et Technologies; 2016. [cited 2019 Sep 19]. Available from: http://www.theses.fr/2016LIL10119.

Council of Science Editors:

Bressel M. Modélisation raphique pour le pronostic robuste de pile à combustible à membrane échangeuse de proton : Graphical modeling for robust prognostic of proton exchange membrane fuel cell. [Doctoral Dissertation]. Université Lille I – Sciences et Technologies; 2016. Available from: http://www.theses.fr/2016LIL10119

Columbia University

24. Monard, Francois. Taming unstable inverse problems: Mathematical routes toward high-resolution medical imaging modalities.

Degree: 2012, Columbia University

URL: https://doi.org/10.7916/D8DZ0GDK

► This thesis explores two mathematical routes that make the transition from some severely ill-posed parameter reconstruction problems to better-posed versions of them. The general introduction… (more)

▼ This thesis explores two mathematical routes that make the transition from some severely ill-posed parameter reconstruction problems to better-posed versions of them. The general introduction starts by defining what we mean by an inverse problem and its theoretical analysis. We then provide motivations that come from the field of medical imaging. The first part consists in the analysis of an inverse problem involving the Boltzmann transport equation, with applications in Optical Tomography. There we investigate the reconstruction of the spatially-dependent part of the scattering kernel, from knowledge of angularly averaged outgoing traces of transport solutions and isotropic boundary sources. We study this problem in the stationary regime first, then in the time-harmonic regime. In particular we show, using techniques from functional analysis and stationary phase, that this inverse problem is severely ill-posed in the former setting, whereas it is mildly ill-posed in the latter. In this case, we deduce that making the measurements depend on modulation frequency allows to improve the stability of reconstructions. In the second part, we investigate the inverse problem of reconstructing a tensor-valued conductivity (or diffusion) coefficient in a second-order elliptic partial differential equation, from knowledge of internal measurements of power density type. This problem finds applications in the medical imaging modalities of Electrical Impedance Tomography and Optical Tomography, and the fact that one considers power densities is justified in practice by assuming a coupling of this physical model with ultrasound waves, a coupling assumption that is characteristic of so-called hybrid medical imaging methods. Starting from the famous Calderon's problem (i.e. the same parameter reconstruction problem from knowledge of boundary fluxes of solutions), and recalling its lack of injectivity and severe instability, we show how going from Dirichlet-to-Neumann data to considering the power density operator leads to reconstruction of the full conductivity tensor via explicit inversion formulas. Moreover, such reconstruction algorithms only require the loss of either zero or one derivative from the power density functionals to the unknown, depending on what part of the tensor one wants to reconstruct. The inversion formulas are worked out with the help of linear algebra and differential geometry, in particular calculus with the Euclidean connection. The practical pay-off of such theoretical improvements in injectivity and stability is twofold: (i) the lack of injectivity of Calderà³n's problem, no longer existing when using power density measurements, implies that future medical imaging modalities such as hybrid methods may make anisotropic properties of human tissues more accessible; (ii) the improvements in stability for both problems in transport and conductivity may yield practical improvements in the resolution of images of the reconstructed coefficients.

Subjects/Keywords: Mathematics; Diagnostic imaging

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APA (6^th Edition):

Monard, F. (2012). Taming unstable inverse problems: Mathematical routes toward high-resolution medical imaging modalities. (Doctoral Dissertation). Columbia University. Retrieved from https://doi.org/10.7916/D8DZ0GDK

Chicago Manual of Style (16^th Edition):

Monard, Francois. “Taming unstable inverse problems: Mathematical routes toward high-resolution medical imaging modalities.” 2012. Doctoral Dissertation, Columbia University. Accessed September 19, 2019. https://doi.org/10.7916/D8DZ0GDK.

MLA Handbook (7^th Edition):

Monard, Francois. “Taming unstable inverse problems: Mathematical routes toward high-resolution medical imaging modalities.” 2012. Web. 19 Sep 2019.

Vancouver:

Monard F. Taming unstable inverse problems: Mathematical routes toward high-resolution medical imaging modalities. [Internet] [Doctoral dissertation]. Columbia University; 2012. [cited 2019 Sep 19]. Available from: https://doi.org/10.7916/D8DZ0GDK.

Council of Science Editors:

Monard F. Taming unstable inverse problems: Mathematical routes toward high-resolution medical imaging modalities. [Doctoral Dissertation]. Columbia University; 2012. Available from: https://doi.org/10.7916/D8DZ0GDK

25. Traoré, Moussa Amadou. Supervision adaptative et pronostic de défaillance pour la maintenance prévisionnelle de systèmes évolutifs complexes : Adaptive supervision and prognosis of failure for predictive maintenance of complex evolutive systems.

Degree: Docteur es, Automatique et Informatique industrielle, 2010, Université Lille I – Sciences et Technologies

URL: http://www.theses.fr/2010LIL10146

►

Une maintenance prévisionnelle efficace repose d’une part sur une modélisation précise de connaissances expertes préexistantes (AMDEC, Arbre de défaillance, etc.) et d’autre part sur des… (more)

▼

Une maintenance prévisionnelle efficace repose d’une part sur une modélisation précise de connaissances expertes préexistantes (AMDEC, Arbre de défaillance, etc.) et d’autre part sur des outils de supervision et de pronostic sensibles aux évolutions du procédé. La performance de ces outils repose sur l’analyse et l’estimation en temps réel de l’état du procédé, mais également sur la prévision de ses états futurs. Sur cette base, des indicateurs tels que les valeurs probabilistes issues du pronostic de défaillances peuvent être exploités pour la planification efficiente d’actions de maintenance. En partant des connaissances expertes préétablies, nous proposons une approche de supervision adaptative basée sur une technique de reconnaissance des formes, AUDyC (AUto-adaptive and Dynamical Clustering), qui est particulièrement adapté aux systèmes dynamiques évolutifs et complexes. Cette approche permet de suivre en temps réel l’état de fonctionnement du procédé, avec un minimum de connaissances a priori sur ses caractéristiques physiques, de détecter et de diagnostiquer tout changement de son comportement, même si le système évolue vers un état jusqu’alors inconnu et d’actualiser la base de connaissance par intégration de nouveautés. Une approche de pronostic de défaillance couplée au processus de supervision adaptative est alors proposée afin de fournir en temps réel, l’état futur d’un procédé tout en estimant la probabilité qu’une défaillance survienne à un instant futur ainsi que la fiabilité de ce pronostic. Cette architecture de supervision adaptative et de pronostic proposée est utilisée pour la maintenance prévisionnelle des composants d’un système réel de thermorégulation.

An effective predictive maintenance relies on the one hand, on an accurate modeling of available expert knowledge (Failure Mode, Effects and Criticality Analysis, Fault Tree, etc) and on the other hand, on monitoring tools that are sensitive to changes in the process under consideration. The performance of the monitoring tools consists not only in their ability to estimate and analyze the process state in real-time, but also in their capability to predict the future states. On this basis, indicators derived from the probabilistic prediction of failure occurrences can be exploited for the efficient planning of maintenance actions. Based on the predefined expert knowledge, we propose an approach of supervision based on a pattern recognition technique, the AUDyC algorithm (Auto-adaptive and Dynamical Clustering), which is particularly suitable for dynamic and complex systems monitoring. The proposed supervision approach allows us to (i) monitor the operational status of the system in real-time, with a minimum prior physical knowledge, (ii) detect and diagnose any change in the system behavior, even if the system evolves to a previously unknown state, (iii) update the basis of knowledge about the system by integrating new features into it. In order to provide in real-time an estimate of the future state of the system, a prognosis technique is…

Advisors/Committee Members: Lecœuche, Stéphane (thesis director), Duviella, Eric (thesis director).

Subjects/Keywords: Diagnostic prédictif (maintenance)

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APA (6^th Edition):

Traoré, M. A. (2010). Supervision adaptative et pronostic de défaillance pour la maintenance prévisionnelle de systèmes évolutifs complexes : Adaptive supervision and prognosis of failure for predictive maintenance of complex evolutive systems. (Doctoral Dissertation). Université Lille I – Sciences et Technologies. Retrieved from http://www.theses.fr/2010LIL10146

Chicago Manual of Style (16^th Edition):

Traoré, Moussa Amadou. “Supervision adaptative et pronostic de défaillance pour la maintenance prévisionnelle de systèmes évolutifs complexes : Adaptive supervision and prognosis of failure for predictive maintenance of complex evolutive systems.” 2010. Doctoral Dissertation, Université Lille I – Sciences et Technologies. Accessed September 19, 2019. http://www.theses.fr/2010LIL10146.

MLA Handbook (7^th Edition):

Traoré, Moussa Amadou. “Supervision adaptative et pronostic de défaillance pour la maintenance prévisionnelle de systèmes évolutifs complexes : Adaptive supervision and prognosis of failure for predictive maintenance of complex evolutive systems.” 2010. Web. 19 Sep 2019.

Vancouver:

Traoré MA. Supervision adaptative et pronostic de défaillance pour la maintenance prévisionnelle de systèmes évolutifs complexes : Adaptive supervision and prognosis of failure for predictive maintenance of complex evolutive systems. [Internet] [Doctoral dissertation]. Université Lille I – Sciences et Technologies; 2010. [cited 2019 Sep 19]. Available from: http://www.theses.fr/2010LIL10146.

Council of Science Editors:

Traoré MA. Supervision adaptative et pronostic de défaillance pour la maintenance prévisionnelle de systèmes évolutifs complexes : Adaptive supervision and prognosis of failure for predictive maintenance of complex evolutive systems. [Doctoral Dissertation]. Université Lille I – Sciences et Technologies; 2010. Available from: http://www.theses.fr/2010LIL10146

University of New South Wales

26. Ubolyam, Sasiwimol. Assessment of possible diagnostic and prognostic markers of tuberculosis.

Degree: Kirby Institute, 2018, University of New South Wales

URL: http://handle.unsw.edu.au/1959.4/61717 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:56911/SOURCE02?view=true

► Tuberculosis (TB) remains one of the leading causes of death. Delayed diagnosis and treatment of TB as well as an emergence of drug-resistant TB are… (more)

▼ Tuberculosis (TB) remains one of the leading causes of death. Delayed diagnosis and treatment of TB as well as an emergence of drug-resistant TB are major problems in Thailand, which has a high burden of both TB and HIV infections. Assessment of possible diagnostic and prognostic markers of MTB infection is a priority.The CHULA TB National Research University (NRU) prospective study was conducted at 3 large urban tertiary care hospitals. Patients who had suspected pulmonary (PTB) were enrolled. Expectorated sputum samples were sent for staining, mycobacterial culture, and the Xpert MTB/RIF. Peripheral blood mononuclear cells (PBMCs) were cryopreserved and archived and the CD25/CD134 (OX40) assay performed on thawed cells. The Xpert MTB/RIF assay was evaluated for assay performance in comparison with AFB smear and culture as a gold standard and was found to be superior. The diagnostic utility of measuring antigen specific immune response to TB infection, via the CD25/CD134 (OX40) assay was explored. This assay had high sensitivity and specificity in diagnosis of PTB with superior performance characteristics in the HIV-infected population.The pattern of kinetics of recall immune responses to specific MTB antigens CD4 T cells immune response and of specific regulatory CD4 T cell responses to MTB (CD39Sp-T cells) were investigated in individuals receiving treatment for active PTB, with and without intercurrent HIV infection. We found the specific CD4 T cell responses and specific CD4 T cells regulatory responses to MTB were potentially differentially not completely restored, making patients more susceptible to reinfection post therapy in HIV co-infection and it is unlikely to be caused from TB induced immunosuppression.Assessment of candidate biomarkers of Th1/Th2, inflammatory cytokines/chemokines and serum 25 – hydroxyvitamin D (25-OH Vitamin D) were performed at the time of TB diagnosis. Patients who died or were cured from TB were compared in a case control study to provide pilot data regarding the potential these analytes to act as biomarkers predictive of the outcome of TB treatment. The most promising biomarkers that identified mortality risk were IFN-γ, granzyme A and granzyme B. The roles of these granzymes need to be further explored as possible predictors of disease progression. Advisors/Committee Members: Kelleher, Anthony, Kirby Institute, Faculty of Medicine, UNSW.

Subjects/Keywords: Tuberculosis; Diagnostic; Prognostic

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ubolyam, S. (2018). Assessment of possible diagnostic and prognostic markers of tuberculosis. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/61717 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:56911/SOURCE02?view=true

Chicago Manual of Style (16^th Edition):

Ubolyam, Sasiwimol. “Assessment of possible diagnostic and prognostic markers of tuberculosis.” 2018. Doctoral Dissertation, University of New South Wales. Accessed September 19, 2019. http://handle.unsw.edu.au/1959.4/61717 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:56911/SOURCE02?view=true.

MLA Handbook (7^th Edition):

Ubolyam, Sasiwimol. “Assessment of possible diagnostic and prognostic markers of tuberculosis.” 2018. Web. 19 Sep 2019.

Vancouver:

Ubolyam S. Assessment of possible diagnostic and prognostic markers of tuberculosis. [Internet] [Doctoral dissertation]. University of New South Wales; 2018. [cited 2019 Sep 19]. Available from: http://handle.unsw.edu.au/1959.4/61717 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:56911/SOURCE02?view=true.

Council of Science Editors:

Ubolyam S. Assessment of possible diagnostic and prognostic markers of tuberculosis. [Doctoral Dissertation]. University of New South Wales; 2018. Available from: http://handle.unsw.edu.au/1959.4/61717 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:56911/SOURCE02?view=true

University of Arizona

27. Nelson, Rebecca. Diagnostic Challenges: Advancing Assay Design .

Degree: 2018, University of Arizona

URL: http://hdl.handle.net/10150/630106

► Prologue: A unique aspect of the Professional Science Masters Applied Bioscience program is to immerse future graduates into the fields of scientific research inclusive of… (more)

▼ Prologue: A unique aspect of the Professional Science Masters Applied Bioscience program is to immerse future graduates into the fields of scientific research inclusive of both business and basic science. At the culmination of the program, an 8 credit hour internship requirement proved to be an invaluable opportunity for me to experience a broad range of scientific inquiry. Throughout the duration of the internship, I was able to learn and master laboratory techniques, adhere to federal and state regulations, practice communicating my results, and ultimately be a contributing member of a collaborative team. In return, I aided my supervisors by completing projects and assigned tasks that was of great value and/or interest to the company. Internships can be done at one company or split to be completed at two separate industries. I was fortunate enough to be able to experience two companies, one focusing more on research and assay development (MSDx) and the other focusing on diagnostic tools to add to their testing services (Pharos Dx). The first internship was with MSDx, Inc., a research company aiming to provide diagnostic solutions for neurodegenerative disorders. The researchers were interested in moving a first generation assay to a second generation assay for greater specificity in detecting tau, a protein which is primarily located within the brain and a proven marker for brain degeneration [10, 11]. Their first generation assay, an indirect ELISA, is compatible with their current anti-tau monoclonal and polyclonal antibodies. My responsibilities were to search for additional anti-tau antibodies that could be used as pairs in a sandwich assay and would detect an epitope within the tau amino acid sequence of interest (c-terminus of the protein). At the conclusion of the internship, I created a table of commercially available antibodies and provided it to the company (table 1 within the paper). I was also able to demonstrate how the first generation assay worked to model the first steps that would be taken when testing a new antibody for assay development (figure 4). The second internship took place at Pharos Dx., which is a diagnostic company utilizing liquid-chromatography mass-spectrometry as part of their testing services. Pharos Dx was looking to offer microsampling devices to their clientele as it would help veterinarians to easily collect samples from animals. Microsampling has a disadvantage with the hematocrit where an unknown volume of blood would affect the overall spreading and homogeneity of the sample across the filter paper [43, 46]. My responsibility during this internship was to research the various microsampling tools currently out on the market. With the amount of published papers available, my objective was to sort through the validated and completed experiments to make a recommendation to Pharos Dx regarding the microsampling device to pursue and explore further. At the conclusion of the internship, I summarized my findings (presented within this paper) and … Advisors/Committee Members: Wertheimer, Anne (advisor).

Subjects/Keywords: diagnostic & laboratory science

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Nelson, R. (2018). Diagnostic Challenges: Advancing Assay Design . (Masters Thesis). University of Arizona. Retrieved from http://hdl.handle.net/10150/630106

Chicago Manual of Style (16^th Edition):

Nelson, Rebecca. “Diagnostic Challenges: Advancing Assay Design .” 2018. Masters Thesis, University of Arizona. Accessed September 19, 2019. http://hdl.handle.net/10150/630106.

MLA Handbook (7^th Edition):

Nelson, Rebecca. “Diagnostic Challenges: Advancing Assay Design .” 2018. Web. 19 Sep 2019.

Vancouver:

Nelson R. Diagnostic Challenges: Advancing Assay Design . [Internet] [Masters thesis]. University of Arizona; 2018. [cited 2019 Sep 19]. Available from: http://hdl.handle.net/10150/630106.

Council of Science Editors:

Nelson R. Diagnostic Challenges: Advancing Assay Design . [Masters Thesis]. University of Arizona; 2018. Available from: http://hdl.handle.net/10150/630106

University of Nottingham

28. Six, Joseph. New MRI contrast agents through spin exchange optical pumping of noble gases with a nuclear electric quadrupole moment.

Degree: PhD, 2014, University of Nottingham

URL: http://eprints.nottingham.ac.uk/14118/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.632454

► Hyperpolarized 83Kr has previously demonstrated MRI contrast that is sensitive to the chemical composition of the surface in a porous model system. One-dimensional nuclear magnetic… (more)

Subjects/Keywords: 616.07; WN Radiology. Diagnostic imaging

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Six, J. (2014). New MRI contrast agents through spin exchange optical pumping of noble gases with a nuclear electric quadrupole moment. (Doctoral Dissertation). University of Nottingham. Retrieved from http://eprints.nottingham.ac.uk/14118/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.632454

Chicago Manual of Style (16^th Edition):

Six, Joseph. “New MRI contrast agents through spin exchange optical pumping of noble gases with a nuclear electric quadrupole moment.” 2014. Doctoral Dissertation, University of Nottingham. Accessed September 19, 2019. http://eprints.nottingham.ac.uk/14118/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.632454.

MLA Handbook (7^th Edition):

Six, Joseph. “New MRI contrast agents through spin exchange optical pumping of noble gases with a nuclear electric quadrupole moment.” 2014. Web. 19 Sep 2019.

Vancouver:

Six J. New MRI contrast agents through spin exchange optical pumping of noble gases with a nuclear electric quadrupole moment. [Internet] [Doctoral dissertation]. University of Nottingham; 2014. [cited 2019 Sep 19]. Available from: http://eprints.nottingham.ac.uk/14118/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.632454.

Council of Science Editors:

Six J. New MRI contrast agents through spin exchange optical pumping of noble gases with a nuclear electric quadrupole moment. [Doctoral Dissertation]. University of Nottingham; 2014. Available from: http://eprints.nottingham.ac.uk/14118/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.632454

29. Baiche, Karim. Surveillance automatisée de processus industriels complexes.

Degree: 2014, Université M'Hamed Bougara Boumerdès

URL: http://dlibrary.univ-boumerdes.dz:8080123456789/1446

►

114 p. : ill. ; 30 cm

Les processus industriels complexes nécessitent une méthodologie de détection rapide et précoce des défaillances dans leurs systèmes et… (more)

Subjects/Keywords: Diagnostic; Machines tournantes; Ondelettes appliquée

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Baiche, K. (2014). Surveillance automatisée de processus industriels complexes. (Thesis). Université M'Hamed Bougara Boumerdès. Retrieved from http://dlibrary.univ-boumerdes.dz:8080123456789/1446

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Baiche, Karim. “Surveillance automatisée de processus industriels complexes.” 2014. Thesis, Université M'Hamed Bougara Boumerdès. Accessed September 19, 2019. http://dlibrary.univ-boumerdes.dz:8080123456789/1446.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Baiche, Karim. “Surveillance automatisée de processus industriels complexes.” 2014. Web. 19 Sep 2019.

Vancouver:

Baiche K. Surveillance automatisée de processus industriels complexes. [Internet] [Thesis]. Université M'Hamed Bougara Boumerdès; 2014. [cited 2019 Sep 19]. Available from: http://dlibrary.univ-boumerdes.dz:8080123456789/1446.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Baiche K. Surveillance automatisée de processus industriels complexes. [Thesis]. Université M'Hamed Bougara Boumerdès; 2014. Available from: http://dlibrary.univ-boumerdes.dz:8080123456789/1446

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

30. Ikhlef, Boualem. Contribution à l’étude de la supervision industrielle automatique dans un environnement SCADA.

Degree: 2009, Université M'Hamed Bougara Boumerdès

URL: http://dlibrary.univ-boumerdes.dz:8080123456789/1507

►

89 p. : ill. ; 30 cm

Répondant aux besoins de la qualité, de la quantité de la production et de la concurrence du marché… (more)

Subjects/Keywords: Diagnostic; Environnement; Prospection électrique

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ikhlef, B. (2009). Contribution à l’étude de la supervision industrielle automatique dans un environnement SCADA. (Thesis). Université M'Hamed Bougara Boumerdès. Retrieved from http://dlibrary.univ-boumerdes.dz:8080123456789/1507

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ikhlef, Boualem. “Contribution à l’étude de la supervision industrielle automatique dans un environnement SCADA.” 2009. Thesis, Université M'Hamed Bougara Boumerdès. Accessed September 19, 2019. http://dlibrary.univ-boumerdes.dz:8080123456789/1507.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ikhlef, Boualem. “Contribution à l’étude de la supervision industrielle automatique dans un environnement SCADA.” 2009. Web. 19 Sep 2019.

Vancouver:

Ikhlef B. Contribution à l’étude de la supervision industrielle automatique dans un environnement SCADA. [Internet] [Thesis]. Université M'Hamed Bougara Boumerdès; 2009. [cited 2019 Sep 19]. Available from: http://dlibrary.univ-boumerdes.dz:8080123456789/1507.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ikhlef B. Contribution à l’étude de la supervision industrielle automatique dans un environnement SCADA. [Thesis]. Université M'Hamed Bougara Boumerdès; 2009. Available from: http://dlibrary.univ-boumerdes.dz:8080123456789/1507

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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Open Access Theses and Dissertations