Cryogenic Temperature Sensor Based on Fresnel Reflection From a Polymer-Coated Facet of Optical Fiber

Sampath, Umesh,Kim, Dae-Gil,Kim, Hyunjin,Song, Minho IEEE 2018 IEEE SENSORS JOURNAL Vol.18 No.9

<P>We report a fiber-optic sensor based on Fresnel reflection for real-time monitoring of cryogenic temperatures. Coating highly thermo-sensitive polymers on the facet of optical fiber, we obtain average measurement sensitivity 0.04 dB/K in temperature range of 90–298 K. We show theoretical background of polymer’s thermo-optic response and the experimental results performed with two kinds of coating polymers, epoxy resin, and polymethyl methacrylate. The experimental results confirm the suitability for cryogenic temperature sensing applications, such as superconducting lines and magnets with simple and cost-effective sensor structure and signal processing.</P>

Inhibition of Atherosclerosis in Low-Density Lipoprotein Receptor-Negative Mice by Sesame Oil

Sampath Parthasarathy,Shylesh Bhaskaran,Nalini Santanam,Meera Penumetcha 한국식품영양과학회 2006 Journal of medicinal food Vol.9 No.4

Diet has profound effects on the development of atherosclerosis. Fatty acid composition, antioxidants, andother components such as lignans have major effects on the atherosclerotic process. Sesame oil has both mono- and polyun-saturated fatty acid constituents in equal proportions. In addition, it also has high levels of numerous antioxidants and induc-ers of peroxisome proliferator-activated receptor. The objective of this study was to determine the anti-atherosclerotic effectsof sesame oil. In this study, male low-density lipoprotein (LDL) receptor (LDLR) . /. mice were fed atherogenic diet oratherogenic diet reformulated with the same level of sesame oil (sesame oil diet). Plasma lipids and atherosclerotic lesionswere quantified after 3 months of feeding. Sesame oil-containing diet significantly reduced the atherosclerotic lesion forma-tion and plasma cholesterol, triglyceride, and LDL cholesterol levels in LDLR . /. mice. These findings suggest that sesameoil could inhibit atherosclerosis lesion formation effectively, perhaps because of the synergistic actions of fatty acid and non-saponifiable components.

Ensemble Modulation Pattern based Paddy Crop Assist for Atmospheric Data

Sampath Kumar, S.,Manjunatha Reddy, B.N.,Nataraju, M. International Journal of Computer ScienceNetwork S 2022 International journal of computer science and netw Vol.22 No.9

Classification and analysis are improved factors for the realtime automation system. In the field of agriculture, the cultivation of different paddy crop depends on the atmosphere and the soil nature. We need to analyze the moisture level in the area to predict the type of paddy that can be cultivated. For this process, Ensemble Modulation Pattern system and Block Probability Neural Network based classification models are used to analyze the moisture and temperature of land area. The dataset consists of the collections of moisture and temperature at various data samples for a land. The Ensemble Modulation Pattern based feature analysis method, the extract of the moisture and temperature in various day patterns are analyzed and framed as the pattern for given dataset. Then from that, an improved neural network architecture based on the block probability analysis are used to classify the data pattern to predict the class of paddy crop according to the features of dataset. From that classification result, the measurement of data represents the type of paddy according to the weather condition and other features. This type of classification model assists where to plant the crop and also prevents the damage to crop due to the excess of water or excess of temperature. The result analysis presents the comparison result of proposed work with the other state-of-art methods of data classification.

Fiber-optic miniature sensor for <i>in situ</i> temperature monitoring of curing composite material

Sampath, Umesh,Kim, Dae-gil,Kim, Hyunjin,Song, Minho Informa UK (TaylorFrancis) 2018 JOURNAL OF MODERN OPTICS - Vol.65 No.7

Novel Antioxidants and Atherosclerosis

Sampath Parthasarathy,Nalini Santanam 한국식품영양과학회 2004 한국식품영양과학회 학술대회발표집 Vol.55 No.-

Coronary heart disease (CHD) has been the number one killer in western society for a long time, and CHD in most instances is due to atherosclerosis. One of the earliest events in atherogenesis is the intracellular accumulation of lipids, particularly cholesterol esters, in the aortic intima. The lipids presumably came from the uptake of plasma lipoproteins, particularly from LDL. These foam cells were identified as being predominantly as macrophages. Currently, it is believed that oxidation of low density lipoprotein (LDL) might contribute to the generation of foam cells. An outcome of the oxidation hypothesis is that the consumption of antioxidants would be beneficial. In this study, Boldine, an alkaloid of Peumus boldus was tested for their antioxidant potency both in, in vitro oxidation system and in mouse models. Boldine decreased the ex-vivo oxidation of Low-density lipoprotein (LDL). In vivo studies were performed to study the effect of these compounds on the atherosclerotic lesion formation in LDL r-/- mice. Three groups of LDL r-/- mice (N=12 each) were fed an atherogenic diet. Group 1 was given vehicle and group 2 and 3 were given 1 and 5 mg of Boldine/day in addition to the atherogenic diet. The results indicated that there was a decrease in lesion formation reaching a 40% reduction due to Boldine compared to controls. The in vivo tolerance of Boldine in humans (has been used as an herbal medicine in other diseases) should make it an attractive alternative to vitamin E.

Cluster-based Routing Method for Wireless Sensor Networks with Heterogeneous Node Types

Sampath Priyankara,Kazuhiko Kinoshita,Hideki Tode,Koso Murakami 한국멀티미디어학회 2009 한국멀티미디어학회 국제학술대회 Vol.2009 No.-

With advances of low-cost hardware such as CMOS cameras and microphones, multimedia sensor networking technologies have developed very rapidly in recent years. Maintaining higher alive node ratio and wider coverage area is indispensable for ubiquitous retrieval of multimedia contents such as video and audio streams, still images and scalar sensor data from the environment. To achieve those requirements, sensor network systems are gradually moving into heterogeneous designs, incorporating a variety of sensor nodes. In this paper, we propose a new cluster-based routing method for wireless sensor networks with heterogeneous node types. It selects cluster heads considering not only transmission power and residual energy of each node but also those of its adjacent nodes. Simulation results show that the proposed method significantly increases network lifetime and also maintains high coverage rate in comparison with existing methods.

Comparison of a Free-Field and a Closed-Field Sound Source Identification Paradigms in Assessing Spatial Acuity in Adults With Normal Hearing Sensitivity

Sampath Sridhar,Aisha Syeda,Neelamegarajan Devi,Jain Chandni,Nisha Kavassery V. 대한청각학회 2023 Journal of Audiology & Otology Vol.27 No.4

Background and Objectives: Traditional sound field localization setups in a free-field environment closely represent real-world situations. However, they are costly and sophisticated, and it is difficult to replicate similar setups in every clinic. Hence, a cost-effective, portable, and less sophisticated virtual setup will be more feasible for assessing spatial acuity in the clinical setting. The virtual auditory space identification (VASI) test was developed to assess spatial acuity using virtual sources in a closed field. The present study compares the legitimacy of these two methods.Subjects and Methods: Fifty-five individuals with normal hearing (mean age±SD: 21± 3.26 years) underwent spatial acuity assessment using two paradigms: 1) the sound field paradigm (localization test) and 2) the virtual paradigm (VASI test). Location-specific and overall accuracy scores and error rates were calculated using confusion matrices for each participant in both paradigms.Results: The results of Wilcoxon signed-rank tests showed that the locationspecific and overall accuracy scores for both paradigms were not significantly different. Further, both paradigms did not yield significantly different localization error rates like right and left intra-hemifield errors, inter-hemifield errors, and front-back errors. Spearman’s correlation analysis showed that all the measures of the two paradigms had mild to moderate correlation.Conclusions: These results demonstrate that both VASI and the sound field paradigm localization test performed equally well in assessing spatial acuity.

Influence of Different Desiccants, Flow Type and Packings on the Liquid Desiccant Dehumidification System: A Review

Sampath Suranjan Salins,Shiva Kumar,S. V. Kota Reddy 대한설비공학회 2020 International Journal Of Air-Conditioning and Refr Vol.28 No.1

Desiccant cooling mechanism is one of the alternate methods to control the humidity of air and temperature, compared to the conventional vapor compression method of air conditioning. Desiccant cooling doesn’t use harmful chemicals which effect the ozone layer and it saves lots of energy. Summer air condition system can use this technology since it removes the latent heat load from the room effectively and this process is economical. Selection of the appropriate liquid desiccant and packing material is very vital to obtain maximum dehumidification. This paper focuses on the different desiccants and packings used by different researchers to enhance the dehumidification. Simple and hybrid systems are also reviewed, and their comparison are presented based on the construction and dehumidification performance.

Influence of Laundering on Comfort Characteristics of Moisture Management Finished Microdenier Polyester Knitted Fabrics

Sampath M B,Prakash C,Senthil Kumar M 한국섬유공학회 2019 Fibers and polymers Vol.20 No.3

In this study an attempt has been made to study the influence of laundry performance on the various comfortcharacteristics of Moisture Management Finished (MMF) knitted fabrics. The influence of laundering on comfortcharacteristics of MMF microdenier polyester knitted fabrics was studied to find out the durability of the MMF and itscapability to withstand at least 20 home laundry cycles. In order to study this effect, the MMF knitted fabrics were subjected to different laundering cycles. It was observed that 10 wash and 20 wash fabrics exhibited a superior performance thereby fulfilling an important parameter of permanent wash proofness.

A New MITE Family Belonging Stowaway Super Family, Its Distribution and Insertion Polymorphisms in the Brassica Relatives

Sampath Perumal,Jee Young Park,Shailendra Karki,Hong-Il Choi,Jonghoon Lee,Nur Kholilatul Izzah,Yun-Sun Lee,Nam Hoon Kim,Ju Yoen Jung,Jun Ki Lee,Hyun-Seung Park,Hye Mi Park,Beom-Seok Park,Tae-Jin Yang 한국작물학회 2010 한국작물학회 학술발표대회 논문집 Vol.2010 No.04

family in the Brassica genome sequences by computational approach. The MITE family showed a total of 264bp length including 36bp terminal inverted repeats and remained 2bp (TA) targets it eduplication by its insertion. By searching the genome database of Brassica species, 516, 227, and 15 members were identified from 470Mbp of Brassica oleraceae, 154Mbp of B.rapa and 15Mbp of B.napus, respectively, indicating that there are approximately 692, 760, 1235 copies in B.oleracea, B.rapa and B.napus genomes,respectively. A total of 225 relatively intact MITE members, 146,68, and 11 members, which showed >80% sequence similarity and sequence coverage were identified and retrieved for MITE analysis from B.oleracea, B.rapa and B.napus genomes, respectively. Out of 225 MITE family members 159 having full structure of MITE and 66 having the truncated end either in right TIR or left TIR. Insertion polymorphism due to insertion or non-insertion of MITEs showed high level of polymorphism among accessions intra and inter species of Brassica. The new MITE would provide abetter tool for study molecular breeding in Brassica species and also helpful to understand their contribution in evolution and diversification of the highly duplicated Brassica genome.