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RISS 인기검색어
- 검색키워드
- 저자 : Himanshu Mishra (검색결과 5 건)
- 무료
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Himanshu Mishra,Vikas Kumar,Ashish Kumar 국립중앙과학관 2018 Journal of Asia-Pacific Biodiversity Vol.11 No.3
A field study was carried out to investigate the population status, behavior, and distribution pattern of river lapwings during the study period of 2015–2017 in the Raebareli district, Uttar Pradesh, India. There was a significant difference in the mean population of river lapwings along the study sites but less significant difference in the mean population seasonally. An average of 541 individuals of river lapwings have been reported during the study period. The mean population size was maximum (164.5 ± 28.67) at Gegaso in 2016 and minimum (56.25 ± 28.34) at Sultanpur Barhaia in 2017, whereas the seasonal population status showed maximum (199.5 ± 2.12) count in the summer season at Gegaso and minimum (52.0 ± 4.2) in winter at Sultanpur Barhaia. Moreover, maximum (n = 38) nesting pairs were estimated at Gegaso and least (n = 11) at Unchahar. There was less significant difference in the number of chicks counted in both the breeding seasons (2016 and 2017), but significantly a higher number of chicks (n = 86) were documented at Gegaso and least (n = 25) at Sultanpur Barhaia. Overall, there was no significant difference in the behavioral activities during the breeding and nonbreeding season. The present study clearly indicates that the river bank was the most preferred habitat type and that the distribution pattern was found to be clumped in river lapwings.
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Vikas Kumar,Himanshu Mishra,Ashish Kumar 국립중앙과학관 2021 Journal of Asia-Pacific Biodiversity Vol.14 No.1
A total of 415 individuals of river lapwing were counted in four habitats namely open, unvegetated riverbank, vegetated river bank, river island and crop field, whereas foraging behavior was observed by focalobservation. River lapwings used walk-halt-peck technique most frequently throughout the year in allthe four habitats. Our study suggested that foraging techniques in all the four habitats were non-significantwhereas foraging success varied significantly (p¼0.049, df ¼ 3). During summer, the feeding ratewas significantly different (p˂< 0.0001, F ¼ 12.43, df ¼ 2) at open, unvegetated, river bank from otherhabitats. Moreover, foraging success rate was observed to be varied significantly (p < 0.0001, F ¼13.52, df¼ 2) in all the seasons and across all the habitats. The present study suggests that open, unvegetated riverbank was most preferred habitat since foraging success was significantly different in this habitat.
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Dewan, Abhinav,Sharma, SK,Dewan, AK.,Srivastava, Himanshu,Rawat, Sheh,Kakria, Anjali,Mishra, Maninder,Suresh, T,Mehrotra, Krati Asian Pacific Journal of Cancer Prevention 2016 Asian Pacific journal of cancer prevention Vol.17 No.3
Objective of the study is to evaluate volumetric and dosimetric alterations taking place during radiotherapy for locally advanced head and neck cancer (LAHNC) and to assess benefit of replanning in them. Materials and Methods: Thirty patients with LAHNC fulfilling the inclusion and exclusion criteria were enrolled in a prospective study. Planning scans were acquired both pre-treatment and after 20 fractions (mid-course) of radiotherapy. Single plan (OPLAN) based on initial CT scan was generated and executed for entire treatment course. Beam configuration of OPLAN was applied to anatomy of interim scan and a hybrid plan (HPLAN30) was generated. Adaptive replanning (RPLAN30) for remaining fractions was done and dose distribution with and without replanning compared for remaining fractions. Results: Substantial shrinkage of target volume (TV) and parotids after 4 weeks of radiotherapy was reported (p<0.05). No significant difference between planned and delivered doses was seen for remaining fractions. Hybrid plans showed increase in delivered dose to spinal cord and parotids for remaining fractions. Interim replanning improved homogeneity of treatment plan and significantly reduced doses to cord (Dmax, D2% and D1%) and ipsilateral parotid (D33%, D50% and D66%) (p<0.05). Conclusions: Use of one or two mid-treatment CT scans and replanning provides greater normal tissue sparing along with improved TV coverage.
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Kaufman, Yair,Chen, Szu-Ying,Mishra, Himanshu,Schrader, Alex M.,Lee, Dong Woog,Das, Saurabh,Donaldson Jr., Stephen H.,Israelachvili, Jacob N. American Chemical Society 2017 The Journal of Physical Chemistry Part C Vol.121 No.10
<P>Rough/patterned/textured surfaces with nano/microcavities that broaden below the surface known as 're-entrants'-can be omniphobic (macroscopic contact angle greater than 90 for both water and oils). The existing theoretical models that explain the effects of texture on wetting are complex and do not provide a simple procedure for predicting the thermodynamically stable and metastable states and their corresponding contact angles (for example, wetting states that involve partially filled cavities). Here, we develop a simple-to-apply wetting model that allows for (1) predicting a priori the wetting state (partially or fully filled) of the cavities both under and outside the liquid droplet and the corresponding macroscopic contact angles on any type of textured surface; (2) determining the conditions under which metastable states exist; and (3) engineering specific nano/microtextures that yield any desired macroscopic contact angle, theta(v) for a given intrinsic contact angle theta(0). Subsequently, we experimentally demonstrate how one can use the model to predict the metastable and the thermodynamically stable contact angles on nondeformable textured surfaces consisting of arrays of axisymmetric cavities/protrusions. In this model, we do not consider the effects of gravitational forces, Laplace pressure of the droplet, line tension, droplet impact velocity, and quantitative aspects of contact angle hysteresis. Nonetheless, the model is suitable for accurately predicting the contact angles of macroscopic droplets (droplet volume similar to 1 mu L and base diameters <2 mm), which is of immense relevance in engineering. In the experimental section we also discuss the suitability of the model to be extended in order to include the effects of contact angle hysteresis on the macroscopic apparent contact angle on textured surfaces. Controlling these macroscopic contact angles, whether higher or lower than the intrinsic angle, theta(0), is desirable for many applications including nonwetting, self-cleaning, and antifouling surfaces and for completely wetting/spreading applications, such as creams, cosmetics, and lubricant fluids.</P>
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