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Karma Hissey Lepcha,Allan Lambor Marbaniang,M. Longshithung Patton,Aarti Khyriemmujat 한국강구조학회 2020 International Journal of Steel Structures Vol.20 No.3
The fl exural behaviour of lean duplex stainless steel tubular beams with web openings is presented. A fi nite element study is carried out on lean duplex stainless steel sections with web openings to determine the eff ects of the perforations on the bending capacity, deformed shapes and local buckling characteristics. The study also aims in particular for a comparison between sections having circular or extended openings with a wide range of section slenderness. The bending capacities from the fi nite element results are also compared with the American specifi cation, European specifi cation along with direct strength method. Both ASCE and EN can give a good prediction of the design strengths, however, the direct strength method showed unconservative predictions. Modifi cations have been proposed to both the ASCE specifi cation and the direct strength method for LDSS sections with web openings.
Amalendu Ghosh,Amrita Das,Ruben Lepcha,Kaushik Majumdar,V.K. Baranwal 한국응용곤충학회 2015 Journal of Asia-Pacific Entomology Vol.18 No.3
Darjeeling hills and Dooars of West Bengal (India) are well known for production of mandarin orange and lime. Citrus tristeza virus (CTV) is wide spread in this region. Role of insect vectors in spreading CTV in this region has not been studied so far. Therefore, a study on identification of insect vectors along with their temporal and spatial distributionwas undertaken. Five aphid species were identified fromcitrus orchards of Darjeeling and Dooars viz. Toxoptera citricida, T. aurantii, Aphis gossypii, Myzus persicae and Brachycaudus helichrysi. T. citricida was found predominant in the orchards of lower altitude and was responsible for maximum spread of CTV. T. aurantii was dominant in the citrus orchards at high altitude (N500 m). Incidence of CTV was higher in the orchards where T. citricida was present either alone or with other species. Under caged conditions, T. citricida was more efficient to transmit CTV than the other aphid species. Occurrences of all aphid species were highly influenced by the advent of new flushes.
Nasalance in Cochlear Implantees
Swapna Sebastian,N Sreedevi,Anjali Lepcha,John Mathew 대한이비인후과학회 2015 Clinical and Experimental Otorhinolaryngology Vol.8 No.3
Objectives. Speech intelligibility is severely affected in children with congenital profound hearing loss. Hypernasality is a problem commonly encountered in their speech. Auditory information received from cochlear implants is expected to be far superior to that from hearing aids. Our study aimed at comparing the percentages of nasality in the speech of the cochlear implantees with hearing aid users and also with children with normal hearing. Methods. Three groups of subjects took part in the study. Groups I and II comprised 12 children each, in the age range of 4–10 years, with prelingual bilateral profound hearing loss, using multichannel cochlear implants and digital hearing aids respectively. Both groups had received at least one year of speech therapy intervention since cochlear implant surgery and hearing aid fitting respectively. The third group consisted of age-matched and sex-matched children with normal hearing. The subjects were asked to say a sentence which consisted of only oral sounds and no nasal sounds (“Buy baby a bib”). The nasalance score as a percentage was calculated. Results. Statistical analysis revealed that the children using hearing aids showed a high percentage of nasalance in their speech. The cochlear implantees showed a lower percentage of nasalance compared to children using hearing aids, but did not match with their normal hearing peers. Conclusion. The quality of speech of the cochlear implantees was superior to that of the hearing aid users, but did not match with the normal controls. The study suggests that acoustic variables still exist after cochlear implantation in children, with hearing impairments at deviant levels, which needs attention. Further research needs to be carried out to explore the effect of the age at implantation as a variable in reducing nasality in the speech and attaining normative values in cochlear implantees, and also between unilateral versus bilateral implantees.
Sheila Sinha,Hemant K. Badola,Bijoy Chhetri,Kailash S. Gaira,Jhony Lepcha,Pitamber P. Dhyani 국립중앙과학관 2018 Journal of Asia-Pacific Biodiversity Vol.11 No.2
Himalayas provide high altitudinal gradients and extreme slopes which may rapid changes in climatic zones over a small distance which reflects noticeable changes in the forest community structures. We identified and analyzed various aspects of forest community composition with the effect of climatic variables and altitudes in the Singalila National Park (SNP), Khangchendzonga Landscape in Eastern Himalayas (India). We encountered 2075 woody individuals of 70 species within a transect (2000 m-3636 m asl). The entire forest regime reflected a dominance of young trees and the species richness showed a negative correlation with the altitude. Climatic variables (actual evapotranspiration, potential evapotranspiration and moisture index) are the measures of available environmental energies which drive the final shape of forest community structure. Our study revealed that these forces showed a significant relationship with species richness and altitude of the forest which provides the present shape of forest community composition structure of the SNP.