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Classification of African Mosaic Virus Infected Cassava Leaves by the Use of Multi-Spectral Imaging

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Optics and Photonics Journal 2015年第8期5卷 261-272页

作者： Mama Sangare Thérèse Atcham Agneroh Olivier Kossan Bagui Issiaka Traore Abdramane Ba jeremie Thouakesseh Zoueu Laboratoire d’Optique de Spectroscopie et des Sciences de l’Atmosphere Université des Sciences Techniques et Technologies de Bamako (USTTB) Bamako Mali Laboratoire de Phytopathologie et Biologie Végétale Institut National Polytechnique Felix Houphou&#235 t-Boigny Yamoussoukro Cote d’Ivoire Laboratoire d’Instrumentation Image et Spectroscopie Institut National Polytechnique Felix Houphou&#235 t-Boigny Yamoussoukro Cote d’Ivoire

In this work, we have used multispectral imaging technology to classify cassava leaves infected by African mosaic virus by the use of their unique spectral finger print. The spectra are extracted from transmission, reflection and diffusion of their multispectral images;they have been then analyzed with statistical multivariate analysis techniques. Principal component analysis (PCA) has been used followed by K-means and Ascending Hierarchical Classification (AHC) to endorse the classification. The contribution of this work is the use of multispectral imagery which binds both spatial and spectral information to differentiate and sort infected leaves. The results show that the multimodal and imaging spectroscopy may allow blind identification and characterization of infected leaves.

关键词： Classification Infected Leaves African Cassava Mosaic Virus Multispectral Imaging

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过目不忘的黑猩猩

新发现 2014年第11期 64-70页

作者： Rafaele Brillaud jeremie Souteyrat 吴会敏

阿步（Ayumu）在一片嘈杂中数数。它蹲在触屏前，屏幕上随机出现从1到9的数字，但随即被白色方块遮住。阿步需要凭借记忆还原数列。它的父亲阿亮（Akira）则在另一个玻璃隔间（将它们与研究人员隔开）内蹦跳喊叫，因为陌生人的出现让它... 详细信息

阿步（Ayumu）在一片嘈杂中数数。它蹲在触屏前，屏幕上随机出现从1到9的数字，但随即被白色方块遮住。阿步需要凭借记忆还原数列。它的父亲阿亮（Akira）则在另一个玻璃隔间（将它们与研究人员隔开）内蹦跳喊叫，因为陌生人的出现让它震怒。而阿步丝毫不为所动，它有条不紊地给出了正确答案，似乎毫不费力。

关键词：黑猩猩研究人员陌生人

Imaging of Degenerative Pathologies of the Lumbar Spine: Professional Habits in Some Hospitals in Cameroon

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Journal of Biosciences and Medicines 2021年第8期9卷 143-154页

作者： Mohamadou Aminou Yannick Onana Richard Mbozo’o Nvondo Samuel Neossi Nguena Mathurin Aissata Bintou Moctar Ngo Nyemeg Celenaie Claude Mbo Amvene jeremie Department of Radiology and Medical Imaging Faculty of Medicine and Biomedical Sciences University of Ngaoundere Ngaoundere Cameroon Department of Biomedical Sciences Faculty of Science University of Ngaoundere Ngaoundere Cameroon Department of Radiology and Medical Imaging Maroua Regional Hospital Maroua Cameroon Department of Radiology and Medical Imaging Laquintinine Hospital Douala Cameroon

Background: The lumbar spine is the portion most frequently involved in degenerative pathologies. Everyone will suffer one day from “low back pain”. These pathologies are very frequent: epidemiological studies have shown that 65% to 90% of the general population could be affected by low back pain (lumbago) which could become chronic at acertain stage or could be complicated (2% to 4%) of cases could end up affecting nerve roots. Chronic low back pain causes a major public health problem in terms of morbidity and socioeconomic repercussions. Purpose: The overall purpose of this study is to evaluate the professional habits of exam applicants in case of degenerative pathologies of the lumbar spine, to Appreciate the knowledge of clinicians on the usefulness of medical imaging techniques in the event of suspicion of a degenerative pathology of the lumbar spine and finally to evaluate if the professional habits of requesting examinations in Cameroon comply with the Recommendations for Clinical Practice. Methods: A cross-sectional and descriptive study was used and was based on questionnaires distributed to those practitioners who requested for these diagnostic medical imaging studies and procedures at Yaoundé General Hospital (HGY), Yaoundé Central Hospital, La Cathédrale Medical Center, Yaoundé University Teaching Hospital, the Douala General Hospital, the Laquintinie Hospital of Douala, the Military Hospital of Douala, the Daniel Muna Memorial Clinic of Douala, the International Center for Clinical and Medicine Imaging, the Ngaoundere Regional Hospital and the Protestant Hospital of Ngaoundere (HPN), from April 2020 to March 2021. Data collected was processed and analyzed via Epi Info version 12.0 and the statistical test used for correlation was Chi2. Results: 137 practitioners were retained among whom, 90 were male and 47 females, their average age being 46 years with working experience less than 5 y

关键词： Lumbar Spine Medical Imaging Degenerative Pathologies Professional Habits Recommendations

Geochemical and geochronological constraints on an Early Palaeozoic Cascadia-type active margin in the Dunhuang block(NW China)

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Geochemical and geochronological constraints on an Early Pal...

Wearable cardioverter defibrillator:Bridge or alternative to implantation?

作者： jeremie Soldner Chao Yuan Karel Schulmann Pavla ?típská Yunying Zhang Zongying Huang Xinyu Wang

The Tarim and North China Cratons located in the south of the Central Asian Orogenic Belt record a complex Early Palaeozoic tectono-metamorphic evolution. Up to now, such evolution of their northern margins has been interpreted as a result of the southward subduction of the Paleo-Asian Ocean and associated rifting (e.g. De Jong et al., 2006;Han et al., 2015).

关键词： NW China Geochemical and geochronological constraints on an Early Palaeozoic Cascadia-type active margin in the Dunhuang block

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World Journal of Cardiology 2017年第6期9卷 531-538页

作者： jeremie Barraud Jennifer Cautela Morgane Orabona Johan Pinto Olivier Missenard Marc Laine Franck Thuny Franck Paganelli Laurent Bonello Michael Peyrol Department of Cardiology Aix-Marseille UniversityAssistance Publique-Hopitaux de MarseilleNord Hospital13015 MarseilleFrance

The implantable cardioverter-defibrillator(ICD) is effective to prevent sudden cardiac death(SCD) in selected patients with heart disease known to be at high risk for ventricular arrhythmia. Nevertheless, this invasive and definitive therapy is not indicated in patients with potentially transient or reversible causes of sudden death, or in patients with temporary contraindication for ICD placement. The wearable cardioverter defibrillator(WCD) is increasingly used for SCD prevention both in patients awaiting ICD implantation or with an estimated high risk of ventricular arrhythmia though to be transient. We conducted a review of current clinical uses and benefits of the WCD, and described its technical aspects, limitations and perspectives.

关键词： Wearable cardioverter/defibrillator Sudden cardiac death Secondary prevention Primary prevention Ventricular arrhythmias

Impact of the COVID-19 Pandemic on Patient Attendance and Trends in the Use of Medical Imaging Modalities in a Referral Hospital in the City of Douala, Cameroon

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Open Journal of Medical Imaging 2022年第1期12卷 16-24页

作者： Yannick Onana Joshua Tambe Mohamadou Aminou Samuel Mbozo’o Mvondo Francis Ateba Ndongo Jean Claude Mballa Amougou jeremie Mbo Amvene Mathurin Neossi Guena Harvey Onana Boniface Moifo Emile Telesphore Mboudou Douala Gyneco-Obstetric and Pediatric Hospital Douala Cameroon Faculty of Medicine and Biomedical Sciences of Garoua University of Ngaoundere Garoua Cameroon Faculty of Health Sciences University of Buea Buea Cameroon Faculty of Medicine and Pharmaceutical Sciences University of Douala Douala Cameroon Faculty of Sciences University of Ngaoundere Ngaoundere Cameroon Faculty of Medicine and Biomedical Sciences The University of Yaoundé 1 Yaoundé Cameroon

Introduction: The COVID-19 pandemic has led to a massive influx of patients with suspected or confirmed flu to hospitals, paradoxically leading to a decrease in the attendance for some services. This study aspired to assess the impact of the COVID-19 pandemic on the attendance of patients at the Radiology and Medical Imaging Department of a tertiary hospital in Douala, Cameroon. Materials and Methods: This was an observational, retrospective and descriptive hospital-based study. Data on patient attendance was extracted from the medical records at the Radiology Unit of Douala Gyneco-Obstetric and Pediatric Hospital (DGOPH) between the 1st of March 2019 and the 30th of August 2021. Results: There was a drop in the number of sonographies and conventional radiographies by 25.73% and 18.26% respectively during the peaks pandemic period of 2020 compared to the preceding pre-pandemic era (2019). There was a recovery in 2021 as the numbers increased. Computed tomography studies increased by 40.65% during the peak pandemic period of 2020. Conclusion: This study enables us to understand the health-seeking behavior during the COVID-19 pandemic. The increase in CT utilization during the peak period of the pandemic nevertheless required caution in order to ensure safety and to promote rational cost-effective utilization.

关键词： COVID-19 Impact Imaging Trends Radiology Department Douala

Seric Calcium and Magnesium in Normal and Pre Eclamptic Pregnant Women: A Case-Control Study in Kinshasa, D R Congo

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Open Journal of Obstetrics and Gynecology 2018年第4期8卷 408-415页

作者： Pascal Ngoy Wakumilua Donatien Kayembe Nzongola-Nkasu Jean Pierre Elongi Moyene Dophie Tshibuela Beya Mamy Ngole Zita jeremie Muwonga Masidi Mireille Nganga Nkanga Guelord Mukiapini Luzolo Daddy Kabamba Numbi Département de Sciences de la Santé/Faculté de Sciences/Université Pédagogique Nationale Kinshasa RD Congo Département de Biologie Médicale Service de Biologie Cliniques Cliniques Universitaires de Kinshasa Kinshasa RD Congo Département de Gynécologie-Obstétrique Hopital Général de Référence de Kinshasa Kinshasa RD Congo

Goal: The present study aimed to determine the profile of seric calcium and magnesium in pre-eclamptic and eclamptic pregnant women of Kinshasa province in the Democratic Republic of Congo where preeclampsia is characterized not only by a high incidence, but also by a seasonal variation probably related to nutritional intake. Study Design: This is a case-control study that took place during the period from September 2014 to March 2015 in four quaternary and tertiary maternity hospitals in Kinshasa. A total of 113 healthy pregnant women (controls) and 112 pre-eclamptic and eclamptic pregnant women (cases) were included in this study. Seric calcium and magnesium were measured in all these gravidas by the principle of spectrophotometry with a HUMALYSER Primus semi-automaton. Results: The mean age of those gravidas was 26.8 ± 6.3 years (26.7 vs 26.9, p = 0.11). The majority of these gravidas were primiparous. The mean gestational age in both groups was 31.35 ± 0.9 weeks (32.1 vs 30.6, p = 0.21). The average seric calcium value was 4.47 ± 0.23 mEq /L in healthy pregnant women compared to 3.80 ± 0.71 mEq/l in pre-eclamptics (P 0.001). The mean of seric magnesium was 1.56 ± 0.15 mg/dL in healthy pregnant women compared to 1.20 ± 0.41 mg/dL in pre eclamptics (P 0.001). Seric calcium and magnesium values were low in the pre-eclamptic group and lower in the eclamptic group (P 0.001). Conclusion: This study establishes a relationship between the low concentration of seric calcium and magnesium with pre-eclampsia and eclampsia, which could be one of the determinants of the high prevalence and seasonality of the disease in Kinshasa.

关键词： Seric Calcium Magnesium Preeclampsia Kinshasa

Anatomo-Clinical Case: Coexistence of Tuberculosis with Axillary Lymph Node Metastasis in Breast Carcinoma

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Open Journal of Pathology 2018年第4期8卷 132-138页

作者： Aimé Sosthène Ouédraogo Hierrhum Aboubacar Bambara Franck Auguste Hermann Ademayali Ido Welbnoaga Norbert Ramdé Rimwaogdo jeremie Sawadogo Ibrahim Savadogo Souleymane Ouattara Hassami Barry Assita Sanou-Lamien Olga Melanie Lompo Pathological Anatomy Unit of Bogodogo District Hospital Ouagadougou Burkina Faso University Department of Research and Training in Health Sciences (UFR/SDS) Ouagadougou Burkina Faso Clinical Oncology and Hematology Unit of Bogodogo District Hospital Ouagadougou Burkina Faso Legal Medicine Unit of Bogodogo District Hospital Ouagadougou Burkina Faso MD MPH CPH Research Institute JPS Health Network Fort Worth TX USA Pathological Anatomy Unit of Ouahigouya Regional Hospital Centre Ouagadougou Burkina Faso Pathological Anatomy Unit of Blaise Compaoré University Hospital Centre Ouagadougou Burkina Faso Yalgado Ouedraogo University Hospital Centre Ouagadougou Burkina Faso

Introduction: The coexistence of tuberculosis with axillary lymph node metastasis in breast carcinoma is uncommon. Observation: We report a case of a patient aged 59 years presenting a painless nodule in the right breast for one year. The scan and mammography revealed a long-axis node of 3 × 2 × 1 cm in the upper outer quadrant of the right breast ranked stage IV by the American College of Radiology (ACR), associated with a set of axillary lymph nodes and the largest one measuring 15 × 15 × 20 millimeters (mm). The breast biopsy helped diagnose a Scarff Bloom Richardson (SBR) grade II non-specific invasive carcinoma, modified by Ellis and Elston. A right mastectomy associated with a lymph node dissection was performed. We noticed a not well defined and whitish 5 mm tumor mass associated with 16 lymph nodes removed. The histological examination confirmed the diagnosis of SBR grade II non-specific invasive carcinoma with invasion of 7 lymph nodes (N+ = 7/16). In 3 metastatic lymph nodes, there were epithelioid and gigantocellular granulomas with full central necrosis. The Ziehl Neelsen staining had highlighted acid-fast bacilli. The tumor was oestrogen and progesteron receptor, without an overexpression of the oncoprotein human epidermal growth factor receptor 2 (HER2), which corresponds to a 0 score and the Ki 67 proliferation index assessed at 10%. The patient was given an anti-tuberculosis treatment combining Rifampicin (H), Isoniazid (I), Pyrazinamid (Z), Ethambutol (E) over 2 months and secondly a combination of Rifampicin and Isoniazid over 4 months (2RHZE/4 RH). The anti-tumor chemotherapy used a protocol combining 3 FAC60+ 3 Docetaxel (F = Fluorouracil®A = Adriblastin®, C = Cyclophosphamid). Conclusion: This coexistence is uncommon, of incidental discovery and necessitates a multidisciplinary care.

关键词： Breast Carcinoma Tuberculosis Lymph Node Histopathology

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物理法制备钙钛矿太阳能电池阻挡层研究

物理法制备钙钛矿太阳能电池阻挡层研究