Autor: Kumar, Sandeep - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: An Analytical Review on Inter-relationships Between Climate Change and Malaria Transmission
Autorzy:: Pawar, Anil
Kumar, Sandeep
Tematy:: Malaria
climate change
geographical distribution
health
transmission; Pokaż więcej
Data publikacji:: 2017
Powiązania:: https://bibliotekanauki.pl/articles/1114029.pdf Link otwiera się w nowym oknie
Źródło:: World News of Natural Sciences; 2017, 11; 1-4
2543-5426
Pojawia się w:: World News of Natural Sciences
Opis:: Prolong changes in climatic parameters may affect not only the geographical distribution of various vector borne diseases, but also is projected to have adverse effects on human health with regard to infectious diseases, particularly malaria. Malaria is perceived as the world’s most devastating infectious disease, and is responsible for very high morbidity and mortality. A number of socioeconomic, environmental and behavioral factors affect the disease prevalence. Despite these factors, the impact of climate on probability of malaria transmission remains contentious.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Spatial Distribution of Rainfall with Elevation in Satluj River Basin: 1986-2010, Himachal Pradesh, India
Autorzy:: Kumar, Sandeep
Gil, G. S.
Santosh, Santosh
Tematy:: DEM
GIS
Himalayas
Interpolation
Orographic effect
Precipitation
Satluj River Basin; Pokaż więcej
Data publikacji:: 2015
Powiązania:: https://bibliotekanauki.pl/articles/1193947.pdf Link otwiera się w nowym oknie
Źródło:: World Scientific News; 2015, 19; 1-15
2392-2192
Pojawia się w:: World Scientific News
Opis:: The complex relationship between topography and precipitation in mountainous regions such as Himalayas is evident from the pattern of rainfall distribution. The variation in precipitation with altitude is controlled by mean height of clouds and decrease in water vapours with altitude. Spatially distributed measurements of precipitation have gained renewed interest in connection with climate change impact studies. Precipitation values are usually available from a limited number of gauge stations and their spatial estimates can be obtained by interpolation techniques such as Inverse Distance Weighted (IDW), Kriging and Spline. In the present study, precipitation-elevation relationship can be established using Digital Elevation Model (DEM) (Advanced Spaceborne Thermal Emission and Reflection Radiometer-ASTER, 30m resolution), Spline interpolation technique in Geographical Information System (GIS) environment and point data from various gauge stations spread over the Satluj River Basin. Changes of spatial distribution of precipitation with elevation show a distinct shift. Bhakra Dam (5854.60 mm) to Rampur (4451.10 mm), there is continuous variation in rainfall with increase in altitude. But beyond Rampur, variation is very high. Swarghat shows exceptional rainfall (8031.76 mm), may be due to position of mountains and their orographic effects. Maximum rainfall was observed in the lower Himalayas i.e. Shiwalik range. Negligible rainfall was observed beyond Kaza (470 mm), above the elevation of around 3756 m. The general trend of rainfall exhibits that the lower and middle parts experience good rainfall whereas the upper part experiences less rainfall. Such spatial and temporal distribution of rainfall with elevation provides an important platform for hydrologic analysis, planning and management of water resources.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Trend analysis of rainfall in Satluj River Basin, Himachal Pradesh, India
Autorzy:: Kumar, Sandeep
Gill, G. S.
Santosh, Santosh
Tematy:: Himachal Pradesh
Mann-Kendall test
Rainfall
Regression
Satluj River Basin
Trend analysis; Pokaż więcej
Data publikacji:: 2015
Powiązania:: https://bibliotekanauki.pl/articles/1193980.pdf Link otwiera się w nowym oknie
Źródło:: World Scientific News; 2015, 14; 1-55
2392-2192
Pojawia się w:: World Scientific News
Opis:: attention recently, especially in connection with climate change. The changing pattern of rainfall deserves urgent and systematic attention for planning, development, utilisation and management of water resources. The daily data on variable were converted to monthly and then computed to seasonal and annual series. Annual rainfall (mm/yr) was calculated as the sum of monthly values. The missing values in the data were computed by using average method. The records of rainfall were subjected to trend analysis by using both non-parametric (Mann-Kendall test) and parametric (linear regression analysis) procedures. For better understanding of the observed trends, data were computed into standardised precipitation indices (SPI). These standardised data series were plotted against time and the linear trends observed were represented graphically. Trend analysis results of rainfall show that out of 15 annual trends 6 (40%) are increasing and 9 (60%) are decreasing in nature where 1 (6.6%) is statistically significant (increasing) and 2 (13.3%) are statistically significant (decreasing) at 95% confidence level. Similarly, the changes were investigated for the four seasons: winter (December-March), pre-monsoon (April-June), monsoon (July-September) and post-monsoon (October-November). The analysis of rainfall, annual as well as seasonal, of different gauge stations in Satluj River Basin showed a large variability in the trends and magnitudes from 1984 to 2010. The rainfall shows great temporal and spatial variations, unequal seasonal distribution with frequent departures from normal. Majority of gauge stations have experienced decreasing trends, both on seasonal and annual scales. Some were statistically significant at 95% confidence level. The sensitivity of rainfall variations provides important insight regarding the responses and vulnerability of different areas to climate change. It will further strengthen the formulation of future strategy for management of water resources.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Anaesthetic management of a pregnant women taking sildenafil for intra uterine growth retardation undergoing caesarean section: a case report
Autorzy:: Kumar, Sandeep
Nayak, Sudhansu Sekhar
Yadav, Usha
Yadav, Rupesh
Tematy:: Caesarean section
hypotension
sildenafil
anaesthesia; Pokaż więcej
Data publikacji:: 2024-03-31
Powiązania:: https://bibliotekanauki.pl/articles/29432032.pdf Link otwiera się w nowym oknie
Źródło:: Critical Care Innovations; 2024, 7, 1; 49-53
2545-2533
Pojawia się w:: Critical Care Innovations
Opis:: The role of Sildenafil was found in the potential weight gain of the foetus in pregnant women with intrauterine growth retardation (IUGR). Sildenafil acted by inhibiting phosphodiesterase type 5 (PDE5), which was an important enzyme responsible for the degradation of Cyclic guanosine monophosphate (cGMP), resulting in prolongation of action of cGMP and therefore prolonged smooth muscle relaxation and vasodilation of smooth muscle. The mechanism behind the beneficial effect on IUGR was its vasodilator action and, hence, an increase in uteroplacental circulation. But the main issue during anaesthesia was fear of severe hypotension, ocular side effects, and bleeding due to the effect of sildenafil. which was expected in pregnant women taking Sildenafil for intrauterine growth retardation undergoing caesarean section. Severe hypotension was due to augmentation of hypotensive effect of sildenafil and regional anaesthesia. A 29-year-old female, previously healthy, non-smoking, at 33 weeks’ period of gestation presented with complaints of headache and pedal edema in third trimester and was diagnosed with gestational hypertension. On the 28th day of admission, she had episodes of elevated blood pressure. The patient was considered for emergency caesarean section after taking high-risk consent. Techniques for cesarean sections include the single shot spinal technique, epidural catheter technique, or the combined spinal-epidural technique (CSE). While spinal anaesthesia offers a simpler approach with a faster and more reliable onset of surgical anaesthesia, it may be associated with abrupt hemodynamic changes. On the contrary, epidural anaesthesia allows for a gradual onset of sympathectomy, titrated dosing, and postoperative analgesia. In this case, the decision was made to opt for epidural anaesthesia over spinal approach was made to allow for careful drug titration and enhance hemodynamic stability. We conclude that graded epidural epidural anaesthesia played an important role in the prevention of hypotension that was expected in pregnant women taking Sildenafil for intrauterine growth retardation undergoing caesarean section.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Response of stiffness and viscosity on the energy ratios at piezo-visco-thermo-elastic medium
Autorzy:: Kumar, Sandeep
Kumari, Neelam
Gupta, Vipin
Barak, M. S.
Tematy:: termosprężystość
lepkość
interfejs
dual-phase lag
energy ratios
imperfect interface
piezo-thermoelastic
viscosity; Pokaż więcej
Data publikacji:: 2024
Powiązania:: https://bibliotekanauki.pl/articles/59123682.pdf Link otwiera się w nowym oknie
Źródło:: International Journal of Applied Mechanics and Engineering; 2024, 29, 1; 54-72
1734-4492
2353-9003
Pojawia się w:: International Journal of Applied Mechanics and Engineering
Opis:: This article presents a mathematical framework that characterizes a transversely isotropic piezo-visco-thermo-elastic medium within the context of the dual-phase lags heat transfer law (PVID) applied to an elastic medium (ES). Specifically, the study investigates the propagation of plane waves within the elastic medium and their interaction with the imperfect interface of the ES/PVID media. This interaction results in two waves reflecting back into the elastic medium and four waves propagating through the piezo-visco-thermo-elastic medium. The research explores the distribution of energy between the reflected and transmitted waves by analyzing amplitude ratios at the boundary interfaces, considering factors such as phase delays, viscosity effects, and wave frequency. The study illustrates the influence of boundary stiffness and viscosity parameters on these energy ratios through graphical representations. The study's findings are consistent with the principles of the energy balance law, and the research also delves into specific cases of interest. Overall, this investigation provides insights into wave behavior within complex media and offers potential applications across various fields.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Investigation of VBLAST Equalization Technique for Underwater Acoustic Communications
Autorzy:: Pranitha, B.
Anjaneyulu, L.
Minh, Hoa
Aslam, Nauman
Kumar, Sandeep V.
Tematy:: underwater acoustic communication (UWAC)
multiple input multiple output (MIMO)
zero-forcing (ZF)
vertical-Bell laboratories layered space-time (VBLAST); Pokaż więcej
Data publikacji:: 2020
Powiązania:: https://bibliotekanauki.pl/articles/227284.pdf Link otwiera się w nowym oknie
Źródło:: International Journal of Electronics and Telecommunications; 2020, 66, 2; 331-337
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Opis:: Underwater Acoustic Communications (UWAC) is an emerging technology in the field of underwater communications, and it is challenging because of the signal attenuation of the sound waves. Multiple Input and Multiple- Output (MIMO) is introduced in UWAC because of its support in enhancing the data throughput even under the conditions of interference, signal fading, and multipath. The paper presents the concept and analysis of 2 × 2 MIMO UWAC systems that uses a 4 - QAM spatial modulation scheme thus minimizing the decoding complexity and overcoming the Inter Channel Interference (IChI). Bit Error Rate (BER) investigation is carried out over different link distances under acoustic Line of Sight (LOS). The utilization of Zero Forcing (ZF) and Vertical-Bell Laboratories Layered Space-Time (VBLAST) equalizers, which estimates the transmitted data proves a success of removing Inter Symbol Interference (ISI). The ISI caused due to multipath effect and scattering in UWAC can be reduced by iterative process considered in VBLAST. A study is made on how the distance between the transmitter and the receiver and the Doppler Effect has its impact on the performance of the system.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Computational study of ACE and AGT gene of RAAS pathway
Autorzy:: Nisha, Nisha
Kaur, Satbir
Kaur, Sumanpreet
Kumar, Sandeep
Galhna, Kiranjeet Kaur
Kaur, Kamaljeet
Tematy:: Angiotensin converting enzyme
Angiotensinogen
Hypertension
Renin angiotensin aldosterone system
Single nucleotide polymorphism; Pokaż więcej
Data publikacji:: 2018
Powiązania:: https://bibliotekanauki.pl/articles/1112240.pdf Link otwiera się w nowym oknie
Źródło:: World News of Natural Sciences; 2018, 19; 65-77
2543-5426
Pojawia się w:: World News of Natural Sciences
Opis:: Renin angiotensin aldosterone system (RAAS) is a hormone regulatory hormone system that regulate blood pressure. The two major genes ACE and AGT are the players of RAAS pathway. These genes codes for angiotensin convertase enzyme and angiotensinogen protein respectively. The angiotensin convertase enzyme convert inactive angiotensinogen into active angiotensin which further helps in the regulation of blood pressure. Due to imbalance in this pathway may cause hypertension. So in the present study we decided to perform the computational study of ACE and AGT gene. We evaluated the deleterious/damaging effect of SNPs of ACE and AGT gene by SIFT and I-Mutant2.0. The total number of SNPs predicted to be deleterious by both tools were 5 (1.83%) and 22 (6.07%) for AGT and ACE genes respectively. We also studied subcellular location of ACE and AGT genes and drugs targeting these genes from database GeneCards. Further the result output of both the softwares were also compared.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Investigation of Infrared Thermography of Cortical Bone Grinding in Neurosurgery
Autorzy:: Babbar, Atul
Jain, Vivek
Gupta, Dheeraj
Goyal, Kapil Kumar
Prakash, Chander
Saxena, Kuldeep Kumar
Kumar, Sandeep
Bartoszuk, Marian
Tematy:: biomimetic
bone grinding
Infrared thermography
thermal analysis
surfaces
burr; Pokaż więcej
Data publikacji:: 2023
Powiązania:: https://bibliotekanauki.pl/articles/2201892.pdf Link otwiera się w nowym oknie
Źródło:: Advances in Science and Technology. Research Journal; 2023, 17, 1; 116--123
2299-8624
Pojawia się w:: Advances in Science and Technology. Research Journal
Opis:: In this work, an effort has been made to determine the effect of different shape surgical burr on the thermogenesis during bone osteotomy. The abrasion during bone grinding leads to heat generation and subsequently rise in the temperature which may have adverse effects such as osteonecrosis, blood coagulation in the carotid artery, damage to sciatic nerves, and even loss of vision. So, mitigating the temperature rise during bone grinding is of paramount importance. Especially, in endoscopic endonasal approach (EEA) in which nasal passage is used for the inserting the grinding burr and reaching the target region. The miniature abrasion can significantly increase the temperature and hence leads to the thermal damage to nerves surrounding the temporal and frontal lobe. These parts of the brain controls movement, problem solving ability, behavior, personality mood, hearing, language, memory, speech, breathing, heart rate, consciousness etc. Furthermore, neurosurgeons rely on their personal surgical experience for estimating the temperature rise during grinding. However, this is much difficult for novice surgeons. Therefore, it becomes critically important to preserve the soft neural tissues and nerves amid bone grinding. To overcome these concerns, infrared thermography technique has been exploited to determine the possibility of thermogenesis during bone grinding by measuring the temperature rise and its distribution using infrared camera. All experiments have been carried at a constant set of process variables. The grinding zone is continuously flooded with the irrigating solution to remove the heat and bone debris away from the grinding site. It has been observed that convex tool shape generated lower maximum temperature i.e. 46.03 ℃ among all tools. The temperature produced by the convex tool is 12.06% lower than spherical tool, 33.39% lower than cylindrical tool, and 10.55% lower than tree-shape tool. The results showed that convex shape tool could prevent thermal necrosis in the bone as temperature caused (i.e. 46 ℃) was less than the threshold limit of osteonecrosis. Thermograms revealed that infrared thermography technique could be implemented for the in-vivo surgical operations for the measurement of temperature during bone grinding.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: An Environmental Benign Approach for the Assessment of Water Quality during Kumbh at Allahabad
Autorzy:: Singh, Anamika
Mishra, Sandeep Kumar
Tematy:: Allahabad
Physiochemical properties
River Ganga
Water quality; Pokaż więcej
Data publikacji:: 2018
Powiązania:: https://bibliotekanauki.pl/articles/1159708.pdf Link otwiera się w nowym oknie
Źródło:: World Scientific News; 2018, 113; 164-168
2392-2192
Pojawia się w:: World Scientific News
Opis:: Water is one of the most plenty natural resources of the earth. It is important to all living resource which is getting polluted because of anthropogenic activities. The present study was carried out with an aim to impact of mass bathing during Kumbh in 2013 at Allahabad. Water sample was collected from three major location of Allahabad Namely Daraganj, Salori and Sangam for the physiochemical and biological analysis such as pH, temperature, biological oxygen demand, dissolve oxygen etc. It was concluded from the result that water quality of river Ganga shows significant changes during mass bathing. The present study indicates that the water was not fit for bathing as well drinking purposes.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: To Study the Microstructural Evolution of EN353 Steel under Different Heat Treatment Conditions
Autorzy:: Sharma, Lochan
Chaubey, Sandeep Kumar
Tematy:: CCT curves
cooling rate
heat treatment
bainite
ferrite
pearlite
microstructure; Pokaż więcej
Data publikacji:: 2023
Powiązania:: https://bibliotekanauki.pl/articles/27313870.pdf Link otwiera się w nowym oknie
Źródło:: Archives of Metallurgy and Materials; 2023, 68, 2; 423--430
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Opis:: Steel is basically used in construction, automobile, buildings, infrastructure, tools, ships, appliances, machines and weapons due to its good mechanical as well as metallurgical properties. Heat treatment of steels significantly enhance its mechanical and metallurgical properties due to the formation of various phases depending upon the type of steel used for specific application. In present study, blank of EN353 grade steel having different sizes were used to investigate the effect of heat treatment and microstructural changes. JMat-Pro software was used to predict the continuous cooling transformation behaviour of EN353 steel. Different phases such as bainite, perlite and other carbide inclusion can be observed in the microstructural examination. Pearlitic microstructure developed for the specimen of size 40×40×40 mm heated at 870°C for 2 hrs and then isothermal heating was performed for same specimen at 600°C for 73 min followed by air cooling. Relevance Statement: Steel is an important material which is frequently used in almost all areas such as structure building, pressure vessels, transportation and many more other applications. Addition of alloying elements in parent steel significantly improve the metallurgical as well as mechanical properties. Steel properties like tensile strength, toughness, ductility, corrosion resistance, wear resistance, hardness, hot hardness, weldability, fatigue etc. significantly improved with the addition of alloying and heat treatment. Heat treatment processes can be used to improve the properties of steel which are frequently used in many manufacturing industries. Different grades of steels which are heat treated under a set of sequence of heating and cooling to change their physical and mechanical properties so that it can fulfil its function under loading condition. With the help of heat treatment process desired microstructure has been achieved which exhibit good mechanical properties of steels.
Dostawca treści:: Biblioteka Nauki

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