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Characterization of electrical properties of AlGaN/GaN interface using coupled Schrodinger and Poisson equation

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Journal of Semiconductors 2012年第11期33卷 16-23页

作者： S.Das a.k.panda G.N.Dash National Institute of Science and Technology Palur HillsBerhampurOdisha761008India

The electrical characterization of AlGaN/GaN interface is *** dependence of two-dimensional electron gas（2-DEG） density at the interface on the Al mole fraction and thickness of AIGaN layer as well as on the thickness of GaN cap layer is *** information can be used to design and fabricate AlGaN/GaN based MODFET（modulation doped field effect transistor） for optimum DC and RF characteristics.

关键词： MODFET 2-DEG polarization critical thickness self-heating

RF and microwave characteristics of a 10 nm thick InGaN-channel gate recessed HEMT

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Journal of Semiconductors 2013年第11期34卷 36-41页

作者： T.R.Lenka G.N.Dash a.k.panda Department of Electronics and Communication Engineering National Institute of Technology Silchar School of Physics Sambalpur University National Institute of Science and Technology

A new depletion-mode gate recessed A1GaN/InGaN/GaN-high electron mobility transistor （HEMT） with 10 nm thickness of InGaN-channel is proposed. A growth of A1GaN over GaN leads to the formation of two- dimensional electron gas （2DEG） at the heterointerface. High 2DEG density （ns） is achieved at the heterointerface due to a strain induced piezoelectric effect between A1GaN and GaN layers. The electrons are confined in the InGaN-channel without spilling over into the buffer layer, which also reduces the buffer leakage current. From the input transfer characteristics the threshold voltage is obtained as -4.5 V and the device conducts a current of 2 A/mm at a drain voltage of 10 V. The device also shows a maximum output current density of 1.8 A/ram at Vds of 3 V. The microwave characteristics like transconductance, cut-off frequency, max frequency of oscillation and Mason＇s Unilateral Gain of the device are studied by AC small-signal analysis using a two-port network. The stability and power performance of the device are analyzed by the Smith chart and polar plots respectively. To our knowledge this proposed InGaN-channel HEMT structure is the first of its kind.

关键词： 2DEG HEMT InGaN microwave

为新生雏鸡提供早期营养可促进生长和加速消化道发育

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国外畜牧学（猪与禽） 2006年第6期26卷 14-15页

作者： a.k.panda 章君（译）周振兴（校）印度家禽项目董事会不详

对新生雏鸡及早喂料具有激活其生长动力的重要作用。这不仅能加快新生雏鸡对体内残留卵黄的利用速度,而且可加快增重并促进胃肠道的发育。

关键词：消化道发育新生雏鸡营养早期体内残留胃肠道

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通过早期营养促进雏鸡免疫系统的发育

国外畜牧学（猪与禽） 2007年第6期27卷 46-48页

作者：罗何峰 a.k.panda M.R.Reddy

研究表明,雏鸡出壳后立即进食会更健康,且在其一生中会有一个良好的开端。

关键词：免疫系统雏鸡发育营养早期出壳

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粟谷在家禽日粮中的应用

国外畜牧学（猪与禽） 2006年第4期26卷 15-19页

作者：潘雪男（译）覃矜（校） S. V. Rama M．V．L．N．Raju a.k.panda 不详印度海得拉巴家禽项目董事

在配制家禽饲料时并不总是有玉米可供应用,或只能以高价购买玉米。这就向人们提出了一个问题,能否用人类不常食用的粟米替代玉米作为家禽日粮的能量饲料?

关键词：家禽日粮应用粟米家禽饲料能量饲料玉米

Practice patterns among ophthalmic surgeons in treating concomitant oculoplastic conditions in preoperative period:A questionnaire-based study

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World Journal of Clinical Cases 2025年第1期13卷 29-37页

作者： Bijnya Birajita panda Chitaranjan Mishra Bhagabat Nayak Avik kumar Roy Logesh Balakrishnan Priyadarshini Mishra Department of Ophthalmology All India Institute of Medical SciencesBhubaneswar 751019OdishaIndia Department of Vitreo-Retina Trilochan NetralayaSambalpur 768004India Department of Glaucoma Services LV Prasad Eye InstituteBhubaneswar 751013India Department of Statistics Apollo HospitalsChennai 823104India

BACkGROUND Addressing oculoplastic conditions in the preoperative period ensures both the safety and functional success of any ophthalmic *** oculoplastic conditions,like nasolacrimal duct obstruction,have been extensively studied,whereas others,like eyelid malposition and thyroid eye disease,have received minimal or no *** To investigate the current practice patterns among ophthalmologists while treating concomitant oculoplastic conditions before any subspecialty ophthalmic *** A cross-sectional survey was disseminated among ophthalmologists all over *** survey included questions related to pre-operative evaluation,anaesthetic and surgical techniques preferred,post-operative care,the use of adjunctive therapies,and patient follow-up *** A total of 180 ophthalmologists responded to the *** practitioners(89%)felt that the ROPLAS test was sufficient during pre-operative evaluation before any subspecialty surgery was *** most common surgical techniques employed were lacrimal drainage procedures(Dacryocystorhinostomy)(63.3%),eyelid malposition repair(36.9%),and ptosis repair(58.7%).Post-operatively,47.7%of respondents emphasized that at least a 4-week gap should be maintained after lacrimal drainage procedures and eyelid ***-seven percent of ophthalmologists felt that topical anaesthetic procedures should be preferred while performing ocular surgeries in thyroid eye disease *** Approximately 50%of ophthalmologists handle prevalent oculoplastic issues themselves,seeking the expertise of an oculoplastic surgeon under particular *** ophthalmologists still favor using ROPLAS as a preliminary screening method before proceeding with cataract *** conditions and thyroid eye disease are not as commonly addressed before subspecialty procedures compared to issues like nasolacrimal duct obstruction and periocular infections.

关键词： Oculoplasty Ophthalmic plastic surgery Nasolacrimal duct obstruction Practice patterns Survey

Oblique Wave Scattering by An Undulating Porous Bottom in A Two-Layer Ice-Covered Fluid

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China Ocean Engineering 2016年第3期30卷 431-446页

作者： Srikumar panda Department of Mathematics Jadavpur University

The present study analyzes the reflection and transmission phenomenon of water-waves in a two-layer ice-covered system. The upper layer is covered by an ice-sheet, whereas the bottom of the lower layer is undulated and permeable. By using regular perturbation analysis and Fourier transform technique, the problem is solved and the first order reflection and transmission coefficients are determined. It is found that these coefficients depend on the shape as well as the permeability of the undulating bottom. Therefore, from the practical viewpoint, an undulating bottom topography is considered to determine all the aforesaid coefficients. The role of various system parameters, such as porosity, angle of incidence and ice parameters, are discussed to analyze the transformation of incident water wave energy from one layer to another layer. The outcomes are demonstrated in graphical forms.

关键词： water-wave ice cover porosity perturbation analysis Fourier transform reflection and transmission

Model based odia numeral recognition using fuzzy aggregated features

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Frontiers of Computer Science 2014年第6期8卷 916-922页

作者： Tusar kanti MISHRA Banshidhar MAJHI Pankaj k SA Sandeep panda Department of Computer Science and Engineering National Institute of Technology Rourkela 769008 India

In this paper, an efficient scheme for recognition of handwritten Odia numerals using hidden markov model （HMM） has been proposed. Three different feature vectors for each of the numeral is generated through a polygonal approximation of object contour. Subsequently, aggregated feature vector for each numeral is derived from these three primary feature vectors using a fuzzy inference system. The final feature vector is divided into three levels and interpreted as three different states for HMM. Ten different three-state ergodic hidden markov models （HMMs） are thus constructed corresponding to ten numeral classes and parameters are calculated from these models. For the recognition of a probe numeral, its log-likelihood against these models are computed to decide its class label. The proposed scheme is implemented on a dataset of 2500 handwritten samples and a recognition accuracy of 96.3% has been achieved. The scheme is compared with other competent schemes.

关键词： handwritten character recognition HMM pattern recognition Odia numeral OCR

Characteristics of a GaN-based Gunn diode for THz signal generation

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Journal of Semiconductors 2012年第8期33卷 37-43页

作者： R k Parida N C Agrawala G N Dash a.k.panda ITER Siksha‘O'Anusandhan University Rengali College Sambalpur University National Institute of Science&Technology

A generalized large-signal computer simulation program for a Gunn oscillator has been developed. The properties of a Gunn diode oscillator based on the widely explored GaN, are investigated using the developed program. The results show some interesting properties in GaN Gunn diodes which are not seen in GaAs and InP diodes. An output power of 1400 kW/cm^2 is achieved from the GaN Gunn diode, as compared to 4.9 kW/cm^2 from a GaAs diode.

关键词： Gunn devices semiconductor diodes semiconductor materials power GaN