Contrasting SYK-like models

Krishnan, Chethan,Pavan Kumar, K. V.,Rosa, Dario Institute of Physics Pub 2018 The journal of high energy physics Vol.2018 No.1

Nanoindentation of Hair Cortex and Medulla Regions

Chandrakala Kunchi,Karthik Chethan Venkateshan,Ramesh Babu Adusumalli 한국섬유공학회 2019 Fibers and polymers Vol.20 No.7

Reports related to cuticle damage and hair’s mechanical properties are of interest to dermatologists in treatment ofhair disorders. Apart from tensile test, few studies were reported on mechanical properties of hair, especially nanomechanicalproperties of cortex and medulla regions. Inner diameter of hair fiber (8-12 μm) is considered as medulla and it exists in hairat the beginning of the anagen phase. This study is aimed for quantitative comparison of nanomechanical properties betweencortex and medulla and also with respect to donor age by performing nanoindentation on fiber cross sections using twodifferent instruments. The medulla and cortex regions revealed hardness values of 70-170 MPa and 200-312 MPa,respectively. Similarly lower values of indentation modulus were observed for medulla compared to cortex because medullahas poorer orientation of microfibrils compared to the surrounding cortex. This study also found a linear correlation betweenhardness and indentation modulus especially for medulla region. This could be due to the fact that organization of themicrofibrils increases from the medulla center to medulla periphery. It is also found that donor age has no influence on cortexmodulus and hardness. The findings of this study will be useful for dermatologists in estimating the hair disorders and forestimating dye uptake of keratin fibers in textiles.

GIS based infrastructure planning of Cold Storages for Crop Preservation: a case study of Kolar District, Karnataka

A Abhinav,VA Chethan,Shruti Pancholi,P Danuta Mohan,Shaik Mohammed Rayyan,Kamal Pandey 대한공간정보학회 2022 Spatial Information Research Vol.30 No.4

Infrastructure plays a vital role in the growth, performance, and alleviating poverty of a country. India is the second-largest producer of agriculture, requires proper infrastructure like roads, storage facilities, etc. which makes the development, location, and the number of cold storages vital in reducing the expenditure for the farmers as well as ensuring food security. Kolar district, situated in the South-eastern part of Karnataka is a leading producer of fruits and vegetables and faces a shortage of proper infrastructure for agriculture. An attempt is done to use geospatial technologies for analyzing the existing cold storage facilities in the district. The study reveals that the district faces a severe shortage of cold storage and is not evenly distributed which makes the farmer travel long distances to the nearest such facility. The spatial clustering-based approach is used to propose locations for new cold storage facilities. The study reveals that the study area requires a total of 50 new cold storage distributed throughout the district and proposed cold storage facilities will reduce the maximum distance to the nearest cold storage from 50.97 km to 13.98 km.

Optimization of ferrochrome slag as coarse aggregate in concretes

Subhash C. Yaragal,B. Chethan Kumar,Krishna Mate 사단법인 한국계산역학회 2019 Computers and Concrete, An International Journal Vol.23 No.6

The alarming rate of depletion of natural stone based coarse aggregates is a cause of great concern. The coarse aggregates occupy nearly 60-70% by volume of concrete being produced. Research efforts are on to look for alternatives to stone based coarse aggregates from sustainability point of view. Response surface methodology (RSM) is adopted to study and address the effect of ferrochrome slag (FCS) replacement to coarse aggregate replacement in the ordinary Portland cement (OPC) based concretes. RSM involves three different factors (ground granulated blast furnace slag (GGBS) as binder, flyash (FA) as binder, and FCS as coarse aggregate), with three different levels (GGBS (0, 15, and 30%), FA (0, 15, and 30%) and FCS (0, 50, and 100%)). Experiments were carried out to measure the responses like, workability, density, and compressive strength of FCS based concretes. In order to optimize FCS replacement in the OPC based concretes, three different traditional optimization techniques were used (grey relational analysis (GRA), technique for order of preference by similarity (TOPSIS), and desirability function approach (DFA)). Traditional optimization techniques were accompanied with principal component analysis (PCA) to calculate the weightage of responses measured to arrive at the final ranking of replacement levels of GGBS, FA, and FCS in OPC based concretes. Hybrid combination of PCA-TOPSIS technique is found to be significant when compared to other techniques used. 30% GGBS and 50% FCS replacement in OPC based concrete was arrived at, to be optimal.

Effects of bilateral superficial cervical plexus block on sevoflurane consumption during thyroid surgery under entropy-guided general anesthesia: a prospective randomized study

Sudheesh Kannan,Nethra S Surhonne,Chethan Kumar R,Kavitha B,Devika Rani D,Raghavendra Rao R S 대한마취통증의학회 2018 Korean Journal of Anesthesiology Vol.71 No.2

Background: Bilateral superficial cervical plexus block (BSCPB) provides good postoperative analgesia, but its effect on anesthetic consumption is unknown. This study evaluated the effects of BSCPB on sevoflurane consumption during thyroid surgery. Methods: Fifty patients were randomly allocated into groups A and B of 25 each in this prospective double-blind study. Group A received BSCPB with 20 ml 0.25% bupivacaine, whereas group B received 20 ml saline immediately before entropy-guided general anesthesia. Intraoperative hemodynamic parameters, end-tidal sevoflurane concentration, minimum alveolar concentration, and sevoflurane consumption were recorded. Postoperative pain was assessed using a visual analog scale, and the time of the first request for analgesia was noted. All side effects were recorded. Results: Demographics were comparable. Mean sevoflurane consumption [for 30 min: group A = 7.2 (1.1) ml, group B = 8.8 (2.0) ml, P = 0.001; for 60 min: group A = 13.5 (1.7) ml, group B = 16.5 (3.9) ml, P = 0.002] and mean end-tidal sevoflurane concentration [for 30 min: group A = 1.2% (0.2%), group B = 1.4% (0.2%), P = 0.008; for 60 min: group A = 1.2% (0.1%), group B = 1.4% (0.2%), P = 0.010] were significantly lower in group A. Patients in group A had a longer duration of analgesia [361.6 (79.5) min vs. 151.0 (60.2) min, P < 0.001] compared to those in group B. Conclusions: Preinduction BSCPB during thyroid surgery significantly reduced sevoflurane consumption and increased the duration of postoperative analgesia.

Addressing Wallacean shortfall using small sampling approach: a case study with endemic Lycodon flavicollis (Squamata: Colubridae) Mukherjee & Bhupathy, 2007

Sanath Krishna Muliya,Anukul Nath,Gandla Chethan Kumar,Avinash Visvanathan,Melvin Selvan,Raghuram Gowda,Vishal Santra,Abhijit Das 국립중앙과학관 2021 Journal of Asia-Pacific Biodiversity Vol.14 No.2

Delineating species distribution comprising information on habitat suitability is vital for developingconservation strategies. Like many other snake species, Lycodon flavicollis is a poorly studied peninsularIndian endemic species known only from few locality records. We used MaxEnt following the smallsampling approach to determine the probable distribution of the species. We found that the majority ofthe predicted area falls under Deccan Peninsular (Central Plateau and Deccan South) region of Indiafollowed by parts of Western Ghats. Isothermality and mean temperature of wettest quarter hadconsiderable influence on the predicted distribution range of the species. The findings of the presentwork show that our modelling approach may help in identifying new areas where this species may occur. We discussed the usefulness of this approach in determining potential distribution of data deficientspecies such as L. flavicollis. Additionally, we have also provided significant information on morphologyand natural history to enrich our current knowledge on the species.

Role of molybdenum trioxide in enhancing the humidity sensing performance of magnesium ferrite/molybdenum trioxide composite

Babu Reddy, L.P.,Megha, R.,Chethan, B.,Raj Prakash, H.G.,Ravikiran, Y.T.,Ramana, C.H.V.V.,Kim, D. ELSEVIER 2018 INORGANIC CHEMISTRY COMMUNICATIONS Vol.98 No.-

<P><B>Abstract</B></P> <P>In the present work, we prepared magnesium ferrite/molybdenum trioxide (MFMO) nanocomposite using mechano chemical mixing method for humidity sensor at room temperature. Enhancement in active sites for water adsorption in the composite due to the presence of MoO<SUB>3</SUB> confirmed from X-ray diffraction (XRD) studies. Change in grain size distribution and increase in intergranular pores in the composite favouring water adsorption confirmed from its scanning electron microscopy (SEM) image. Increased agglomeration of nano sized particles and improved crystallinity of the composite confirmed from Transmission electron microscopy (TEM) studies and selected area electron diffraction (SAED) pattern. The composite showed maximum sensing response of 4902 as against 183 of MF in the range 11%–97% RH. The response and recovery times of the composite were found to be 45 s and 74 s respectively while those of MF 225 s and 364 s respectively. The nanocomposite sample showed stable humidity sensing ability and a low humidity hysteresis. Molybdenum trioxide plays a major role in enhancing the humidity sensing performance of MFMO composite at room temperature. The sensing mechanism discussed on the basis of chemisorptions, physisorption and capillary condensation processes.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Humidity sensing response of magnisium ferrite (MF) and magnesium ferrite-molybdenum trioxide (MFMO) composite presented. </LI> <LI> The MFMO showed maximum sensing response of 4902 as against 183 of MF in the range 11%-97% RH. </LI> <LI> The response and recovery times of the composite were found to be 45 s and 74 s respectively. </LI> <LI> The sensing mechanism MFMO discussed on the basis of chemisorptions, physisorption and capillary condensation processes. </LI> </UL> </P>

An in vivo electromyographic evaluation of pain relief using different therapies in masticatory myalgia patients

Parvathi K,Balakrishnan,Sowmya M,Kumar,Purushotham Chippala,Chethan Hegde 대한구강악안면외과학회 2020 대한구강악안면외과학회지 Vol.46 No.5

Objectives: This study is aimed to evaluate and compare the effect of moist heat fomentation therapy with ultrasound therapy in patients with the masticatory myalgia. Materials and Methods: The study was conducted on 42 patients with masticatory myalgia, dividing them into two groups; Group A (21 patients), received moist heat therapy and Group B (21 patients), received ultrasound therapy for seven effective days. Prior and after the treatment the numeric rating scale (NRS) and the electromyography (EMG) scores were recorded and compared. The observations were analyzed clinically and statistical support was taken to assess the NRS and EMG data. Results: Irrespective of the groups, patients testified a significant reduction in pain after the treatment. From the EMG readings; even though the standard deviation for each group was varied considerably, EMG recorded an improved muscle activity. Statistical analysis was used to assess and identify the best treatment methodology between the two modalities. Conclusion: From the statistical analysis, it is concluded that, though both the therapies had significantly reduced the symptomatic response, it is moist heat fomentation that improved muscle activity both statistically and clinically in comparison to ultrasound.