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Compa.a.ive Study of Radiological Changes in Hands and Feet in Patients Suffering from Early Rheumatoid Arthritis by Power Doppler Ultrasound and Direct Digital Radiography

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Open Journal of Rheumatology and Autoimmune Diseases 2014年第1期4卷 39-42页

作者： Gargy Mondal Biswadip Ghosh Manoranjan Ghosh Pampa halder Department of Ophthalmology RG Kar Medical College Kolkata India. Department of Radiodiagnosis Medical College Kolkata India Department of Rheumatology Institute of Postgraduate Medical Education and Research Kolkata India Department of Surgery Medical College Kolkata India

Rheumatoid arthritis is a chronic multisystem disease of unknown cause. The cha.a.teristic feature of RA is persistent inflammatory synovitis. The natural history of disease is such that the early months of the disease are critical period during which reversible joint da.a.e occurs. So early diagnosis of Ra.a.d appropriate drug application is the only way to save a patient from this crippling disease. In India, the cost of investigations is a significant factor for most of the patients. Ultrasonography or Power Doppler Ultra Sound (PDUS) has the advantage of being economic in spite of its sensitivity in assessing both inflammatory and destructive changes. The aim of the present study was to evaluate the diagnostic efficiency of PDUS in early rheumatoid arthritis. The study was performed with the patients attending Rheumatology Clinic. A total number of 106 patients of clinically suspected rheumatoid arthritis were studied as per selection criteria. Radiological examinations of hands were done by digital radiography and PDUS in a group of 53 patients, assessment of foot changes by PDUS and Digital Radiography were done in another similar group of 53 patients. Final diagnosis by ACR EULAR-2010 criteria is done for all the patients. The compa.a.ive study reveals that synovial vascularity as demonstrated by PDUS is much more effective in diagnosing early rheumatoid arthritis, both in hand and in feet than digital radiograph. PDUS of feet may yield earlier and better findings than hands, which is conventionally used in patients suffering from early rheumatoid arthritis.

关键词： R.A.—Rheumatoid Arthritis PDUS—Power Doppler Ultrasound D.R.—Digital Radiography ACR-EULAR—American College of Rheumatology (ACR) and the European League a.a.nst Rheumatism (EULAR) RF—Rheumatoid Factor CRP—c-Reactive Protein MRI—Magnetic Resonance Imaging

Mode-locked 2 μm fiber laser with a multi-walled carbon nanotube as a saturable absorber

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Chinese Optics Letters 2015年第3期13卷 10-13页

作者： S.M.Azooz F.Ahmad H.Ahmad S.W.Harun B.A.Hamida S.Khan A.halder M.C.Paul M.Pal S.K.Bhadra Department of Electrical Engineering Faculty of Engineering University of Malaya Photonics Research Center University of Malaya Department of Electrical and Computer Engineering International Islamic University MalaysiaJalan Gombak Fiber Optics and Photonics Division Central Glass & Ceramic Research InstituteCSIR

We propose and demonstrate a passively mode-locked fiber laser operating at 1951.8 nm using a commercial thulium-doped fiber （TDF） laser, a homemade double-clad thulium-ytterbium co-doped fiber （TYDF） as the gain media, and a multi-walled carbon nanotube （MWCNT） based saturable absorber （SA）. We prepare the MWCNT composite by mixing a homogeneous solution of MWCNTs with a diluted polyvinyl alcohol （PVA） polymer solution and then drying it at room temperature to form a film. The film is placed between two fiber connectors as a SA before it is integrated into a laser ring cavity. The cavity consists of a 2 m long TDF pumped by a 800 nm laser diode and a 15 m long homemade TYDF pumped by a 905 nm multimode laser diode. A stable mode-locking pulse with a repetition rate of 34.6 MHz and a pulse width of 10.79 ps is obtained when the 905 nm multimode pump power reaches 1.8-2.2 W, while the single-mode 800 nm pump power is fixed at 141.5 mW at all times. To the best of our knowledge, this is the first reported mode-locked fiber laser using a MWCNT-based SA.

关键词： MWCNTs mode Mode-locked 2 m fiber laser with a multi-walled carbon nanotube as a saturable absorber

COVID-19 in Children: Experience from a Tertiary Care Hospital in Bangladesh

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Open Journal of Pediatrics 2022年第5期12卷 749-766页

作者： Kamrul Laila Mujammel Haque Sutopa halder Supti Sha.a.a.a.hter Rahman Department of Pediatrics Bangabandhu Sheikh Mujib Medical University Dhaka Bangladesh

Background: Children are generally at low risk of infection and da.a.on COVID-19 in children are scarce. This study was undertaken to document da.a.from a tertiary care hospital in Bangladesh on the incidence, presentation and immediate outcome of COVID-19 in children. Methodology: It was a cross-sectional study conducted in the fever clinic and the department of Pediatrics, Banga.a.dhu Sheikh Mujib Medical University (BSMMU) over a period of one year from July 2020 to June 2021. All the RT–PCR positive pediatric cases (1 month to 18 years) were enrolled. Da.a.were collected by a structured, predesigned and pre-tested questionnaire. Da.a.were a.a.yzed using Microsoft Excel spreadsheet software 2010. Frequency, percentage and chi-square tests were done for statistical a.a.ysis. Result: Among 8203 suspected pediatric COVID-19 cases, 850 (10.36%) was RT PCR positive. The highest number of RT-PCR positive COVID-19 cases was found in April 2021. More than 63% of cases were in the age group of 10 to 18 years. Male: female ratio was 0.97:1. Fever was the most common (75.9%) presenting feature followed by breathing difficulty and chest pain in 9.6% and 7% of patients respectively. Mild infection group was predominant (56.7%). Among the symptomatic cases, 16.7% were hospitalized. Oxygen inha.a.ion and bronchodilators were needed in 75% of hospitalized patients. All the severe and critical cases were ma.a.ed in the inpatient department and in pediatric PICU when indicated. Most of the patients (99.4%) improved with or without any complication. Four critically ill patients (0.75%) developed multi-organ dysfunction and expired in PICU. Conclusion: The majority of COVID-19 cases belonged to the older age group. More than 75% cases were symptomatic. History of contact was present in 78% cases. More than 99% children recovered with or without sequelae and 0.8% children with pre-existing co-morbidities expired.

关键词： COVID-19 Infection Severity Age Group Co-Morbid Conditions

Genomic prediction of Fusarium head blight resistance in early stages using advanced breeding lines in hard winter wheat

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The Crop Journal 2022年第6期10卷 1695-1704页

作者： Jinfeng Zhang Harsimardeep S.Gill Navreet K.Brar Jyotirmoy halder Shaukat Ali Xiaotian Liu Amy Bernardo Paul St.a.a.d Guihua Bai Upinder S.Gill Brent Turnipseed Sunish K.Sehgal Department of Agronomy Horticulture&Plant ScienceSouth Dakota State UniversityBrookingsSD 57007USA School of Computing Queen’s UniversityKingstonON K7L 3N6Canada USDa.a.S Hard Winter Wheat Genetics Research UnitManhattanKS 66506USA Department of Plant Pathology North Dakota State UniversityFargoND 58108USA

Fusarium head blight(FHB),also known as scab,is a devastating fungal disease of wheat that causes significant losses in grain yield and *** inheritance and cumbersome phenotyping make FHB resistance a challenging trait for direct selection in wheat *** selection to predict FHB resistance traits has shown promise in several ***,we used univariate and multivariate genomic prediction models to evaluate the prediction accuracy(PA)for different FHB traits using 476elite and advanced breeding lines developed by South Dakota State University hard winter wheat breeding *** breeding lines were assessed for FHB disease index(DIS),and percentage of Fusarium da.a.ed kernels(FDK)in three FHB nurseries in 2018,2019,and 2020(TP18,TP19,and TP20)and were evaluated as training populations(TP)for genomic prediction(GP)of FHB *** observed a moderate PA using univariate models for DIS(0.39 and 0.35)and FDK(0.35 and 0.37)using TP19 and TP20,respectively,while slightly higher PA was observed(0.41 for DIS and 0.38 for FDK)when TP19 and TP20(TP19+20)were combined to leverage the advantage of a large training *** GP with multivariate approach including plant height and days to heading as covariates did not significantly improve PA for DIS and FDK over univariate models,PA for DON increased by 20%using DIS,FDK,DTH as covariates using multi-trait model in ***,we used TP19,TP20,and TP19+20 in forward prediction to calculate genomic-estimated breeding values(GEBVs)for DIS and FDK in preliminary breeding lines at an early stage of the breeding *** observed moderate PA of up to 0.59 for DIS and 0.54for FDK,demonstrating the promise in genomic prediction for FHB resistance in earlier stages using advanced *** results suggest GP for expensive FHB traits like DON and FDK can facilitate the rejection of highly susceptible materials at an early stage in a breeding program.

关键词： FHB GBS Genomic selection Multi-trait models Winter wheat Wheat scab

Unilateral Diaphragmatic Agenesis with Lung Cyst Herniating into the Abdomen Precluding Diaphragmatic Hernia in an Adult

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World Journal of Cardiovascular Surgery 2016年第11期6卷 171-175页

作者： Binay Krishna Sarkar Krishnendu Chakravorty Ashis halder Paresh Banerjee Saroja Bha.a.i Department of Cardiovascular & Thoracic Surgery Nil Ratan Sircar Medical College & Hospital Kolkata India Rush University Medical Center Chicago IL USA University of Illinois College of Medicine Chicago IL USA Advocate Children’s Hospital and Advocate Christ Medical Center Oak Lawn IL USA

Background: Diaphragmatic agenesis or complete absence of a hemidiaphragm in adulthood is rare. The significance of presence of a lung cyst occupying the common thoracoabdominal space lies in the absence of associated diaphragmatic hernia which has not been documented previously. Case Presentation: We report a case of previously undiagnosed complete absence of a hemidiaphragm in a 62-year-old male who presented with recurrent respiratory infection, episodes of nausea.a.d postprandial fullness. Computed Tomography scan showed a large cyst in relation to the lower lobe of left lung. During surgery, he was found to have complete absence of a left hemidiaphragm and a large cyst arising from the lower lobe of left lung occupied the common thoracoabdominal space. Abdominal viscera were found displaced downwards and fixed in a thick fibrous membrane. There was no herniation of abdominal organs into the thoracic cavity after excision of the cyst. The left lung could be fully expanded and chest was closed after putting a chest drain. Diaphragmatic agenesis did not require any additional procedure. The cyst was excised with closure of bronchocystic opening. The patient had an uneventful recovery. Conclusions: The association of lung cyst with diaphragmatic agenesis (presented in the adulthood) is rare. It has precluded a diaphragmatic hernia.a.d survived the patient acting as a protective barrier. The significance of lung cyst in presence of diaphragmatic agenesis lies in the absence of associated diaphragmatic hernia which has not been documented previously.

关键词： Lung Cyst Absent Hemidiaphragm Recurrent Respiratory Infection

Effective Education in a College in Bangladesh: From Ma.a.erial to Transformational Leadership

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American Journal of Operations Research 2019年第5期9卷 219-234页

作者： M. Ha.a. Sarowardy Deb Proshad halder Sharon Campbell Phillips Department of Political Science Jashore Government Girls’ College Jashore Bangladesh Department of English Jashore Government Girls’ College Jashore Bangladesh Department of Education University of the People Pasadena CA USA

This paper is a study on the compulsion of transformational leadership from the part of the principal of this era when the demography of the students are changing exponentially, when the globe is experiencing massive changes in methods and techniques in educational process but the institutions remain the same as its ethics and operational strategies. The time is eloping when an educational head earns praises due to their prominence and performance in ma.a.erial functioning. But this paper tends to focus on several persisting challenges in these educational institutions like huge gap between teacher-student ratio, students’ increasing technological oriented learning, teachers’ lack of knowledge of multimedia class operation, girls’ little rate of enrolment in higher level of education, early marriage of school going girls and ensuring quality education to girls as per the demand of SDG 4 by 2030. This paper fosters the idea that a transformational head of the institution can be successful in this chase of challenges as he involves everyone to activities in order to reach goal. He works with the other members as a team member and thus a challenge of an institution turns to be liability to all.

关键词： Effective Education Ma.a.er Transformer Leadership Role of Principal Bangladesh

A Tm-Bi Co-Doped Fiber Laser with Dual Pumping Operation

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Chinese Physics Letters 2013年第3期30卷 71-74页

作者： N.Saidin S.W.Harun S.S.A.Da.a.huri S.M.M.Ali H.Ahmad A.halder M.C.Paul S.Das M.Pal S.K.Bhadra Department of Electrical Engineering Faculty of EngineeringUniversity of Malaya50603 Kuala LumpurMalaysia Photonics Research Centre University of Malaya50603 Kuala LumpurMalaysia Fiber Optics and Photonics Division CSIR-Central Glass&Ceramic Research InstituteKolkataIndia

We demonstrate an efficient fiber laser operating at 1901.6 nm using a newly developed thulium bismuth co-doped fiber(TBF)with dual pumping at 792 nm and 1552 *** fiber was fabricated using modified chemical vapor deposition and solution doping *** dopant concentrations(wt%)and compositions inside the core are 0.15 Bi_(2)O_(3),0.3 Tm_(2)O_(3),1.0 Al_(2)O_(3) and 12.0 GeO_(2).The TBF laser operates at 1901.6 nm with a lasing efficiency of 33.2%and pump power threshold of 85 mW using a 2-m-long TBF in a linear cavity with two fiber Bragg gratings(FBGs).The high efficiency is attributed to the use of additional 1552 nm pump to complement 792 nm *** maximum output power of 225 mW is achieved at the pump power of 820 mW with the optimum length of 2 m.

关键词： pump fiber pumping

Self-starting harmonic mode-locked Tm-Bi co-doped germa.a.e f iber laser with carbon nanotube-based saturable absorber

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Chinese Optics Letters 2013年第6期11卷 81-83页

作者： N.Saidin D.I.M.Zen S.S.A.Da.a.huri S.W.Harun H.Ahmad F.Ahmad K.Dimyati A.halder M.C.Paul M.Pal S.K.Bhadra Photonics Research Centre University of Malaya50603 Kuala LumpurMalaysia Department of Electrical Engineering Faculty of EngineeringUniversity of Malaya50603 Kuala LumpurMalaysia Department of Electrical and Electronic Engineering National Defense University of MalaysiaKem Sungai Besi57000 Kuala LumpurMalaysia Fiber Optics and Photonics Division Central Glass and Ceramic Research InstituteCSIRKolkataIndia

We report a ring cavity passively harmonic mode-locked fiber laser using a newly developed thulium- bismuth co-doped fiber （TBF） as a gain medium in conjunction with a carbon nanotube （CNT）-based saturable absorber. The TBF laser generates a third harmonic mode-locked soliton pulse train with a high repetition rate of 50 MHz and a pulse duration of 1.86 ps. The laser operates at 1 901.6 nm with an average power of 6.6 mW, corresponding to a pulse energy of 0.132 nJ, at a 1 552 nm pump power of 723.3 roW.

关键词： mode Self-starting harmonic mode-locked Tm-Bi co-doped germa.a.e f iber laser with carbon nanotube-based saturable absorber CNT Tm Bi

The Dependency of Coastal Livelihood on Forest Resources, and Alternative Options in the Periphery of the Sundarbans Reserve Forest, Pathargha.a. Bangladesh

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Open Journal of Forestry 2021年第4期11卷 398-414页

作者： Abdul Alim Shaikh Mousumi halder Mohammad Badrul a.a. Talukder Sk. Mohibullah Sanjoy Saha Climate Change Program Christian Commission for Development in Bangladesh (CCDB) Dhaka Bangladesh Royal Danish Embassy Dhaka Bangladesh Institute for Integrated Studies on the Sundarbans and Coastal Ecosystems (IISSCE) Khulna University Khulna Bangladesh

Dependency on forest resources poses a threat to the environment in Pathargha.a. Bangladesh. Therefore, this study explores the role of forest resource in the life and livelihood of coastal people as well as to understand the effectiveness of forest and status of forest dependency in and around south-central coast in Pathargha.a. Bangladesh. We collected da.a.randomly from 105 household heads through both open and close-ended questionnaire. To investigate the forest dependency and people’s perception regarding alternative solutions, Microsoft excel software program has been applied. The findings reveal that usage of fuelwood in cooking, housing structure, fish catching, honey & fodder collection significantly contributes to household dependency on forest resources, while other variables seem to be insignificant. Our study amplifies that the share of forest income to the total household income was only 19% while other earning sources provideda.a.">a.a.">a.a."> 81% income. The result shows that respondent people collect forest resources primarily for cooking purpose with a share of 71% where 9% forest resources are collected as fodder followed by 8% forest resource collection as food and sheltering purposes. Moreover, the study found that using alternative cooking system, artificial instruments, declaring the forest as tourist spot, changes in housing structure, occupation are some effective options to reduce forest dependency. The study concludes that these alternative options need more financial and other support from the government, non-government and other civil society organizations to cut down forest resource dependency.

关键词： Forest Resource Dependency Biodiversity Conservation Sundarban Reserve Forest Coastal Livelihood