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Depletion of Forest Resources and Wildlife Population with Habitat Complexity: A Mathematical Model

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Open Journal of Ecology 2018年第11期8卷 579-589页

作者： rachana pathak Department of Mathematics Faculty of Engineering University of Lucknow (New Campus) Lucknow India

Nowadays, management and regulation of natural resources like agriculture, fisheries, forestry and wildlife is one of the popular topics in research. The evolution of humankind is largely dependent on the quality of the environment and the resources it provides;but numerous human-induced factors, and climate change may drastically alter the conditions of human sustainability. This paper deals with effect of numerous human-induced activities on the depletion of forestry resources and wildlife population with habitat complexity. A nonlinear mathematical model is proposed and analyzed. In modeling process, we assume that the growth rate of wildlife population wholly depends on forestry biomass. It is depleted by human-induced activities. Local stability analysis of the mathematical model along with the persistence of the system is checked by using theory of nonlinear ordinary differential equations and Butler-McGhee lemma. Analytical results obtained are justified numerically through numerical simulation. Important parameters are investigated and variation of variables with change in these parameters is determined.

关键词： Forestry Biomass Depletion Wildlife Population Human-Induced Activities Stability Persistence

Conservation of Forestry Biomass with the Use of Alternative Resource

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Open Journal of Ecology 2015年第4期5卷 87-109页

作者： Manju Agarwal rachana pathak Department of Mathematics & Astronomy Lucknow University Lucknow India

The effect of the alternative resource and time delay on conservation of forestry biomass is studied by considering a nonlinear mathematical model. In this paper, interaction between forestry biomass, industrialization pressure, toxicant pressure and technological effort is proposed and analysed. We find out the critical value of delay and observe that there is Hopf bifurcation. Using the normal form theory and the center manifold theorem, we determine the stability and direction of the bifurcating periodic solutions. Numerical simulations are given to illustrate the analytical results.

关键词： Forestry Biomass Industrialization Alternative Resource Toxicant Technological Effort Local Stability Hopf Bifurcation

Continuous Mixed p-norm Control Scheme with Reweighted L_(0) norm Variable Step Size for Mitigating Power Quality Problems of Grid Coupled Solar PV Systems

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CSEE Journal of Power and Energy Systems 2023年第4期9卷 1394-1404页

作者： Pallavi Verma Avdhesh Kumar rachana Garg Priya Mahajan Delhi technological university DelhiDelhi 110085India.

In this paper,the performance of a two-stage three-phase grid coupled solar photovoltaic generating system(SPVGS)is analyzed by using a novel reweighted Lo norm variable step size continuous mixed p-norm(RLo-VSSCMPN)of a voltage source inverter(VSI)control *** efficacy of the system is determined by considering unbalanced grid voltage,DC offset,voltage sag and swell,unbalanced load and variations in solar ***-VSSCMPN is used for inverter control and it ex-tracts fundamental components of load current for generating the reference grid current with a faster convergence rate and lesser steady state *** the proposed control,harmonics in the grid current follows the IEEE-519 norm and the performance is also satisfactory under varying environmental/load *** power generated from SPvGS is transferred optimally using a DC-DC boost converter utilizing the incremental conductance(INC)maximum power point *** proposed system is simulated using MATLAB/Simulink 2018a and test results are verified experimentally using dSPACE1202 in the laboratory to ensure the validity of a novel proposed robust *** Terms-INC maximum power point tracker,power quality,reweighted LoVSSCMPN algorithm,solar PV generating system,total harmonic distortion,voltage source inverter.

关键词： INC maximum power point tracker power quality reweighted LoVSSCMPN algorithm solar PV generating system total harmonic distortion voltage source inverter.

Ring Oscillator for 60 Meter Bandwidth

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Computer Systems Science & Engineering 2023年第7期46卷 93-105页

作者： rachana Arya B.K.Singh E.C.E.Department B.T.Kumaon Institute of TechnologyUttrakhnad Technical UniversityDehradun263653UttrakhandIndia Electrical Engineering Department B.T.K.I.T.DwarahatAlmoraUttrakhandIndia

The 60-meter band range is tremendously useful in telecommunication,military and governmental *** I.T.U.(International Telecommunication Union)required isolationism to former radio frequency services because the various frequency bands are extremely *** allocation of new frequency bands are a lengthy procedure as well as time *** a result,the researchers use bidirectional,amateur radio frequency communication for 60-meter band,usually the frequency slot of 5250-5450 KHz,although the entire band is not essentially obtainable for all *** transmission and reception of these frequencies,a local oscillator is used in the mixer unit to generate the local signal for mixing the input and reference *** this function different type of oscillators are *** this paper,a three-stage ring oscillator is designed with 1 V *** oscillators(RO)is the base to explore like to identifying,specify with modelling resources in the disparity in behaviour of the circuit in terms of industrialized design and layout *** type of oscillators are free from noise as inductor is not used to the circuit as in LC oscillator,Heartly oscillator,Colpitt and tuned *** present approach of circuit designing,the scaling of CMOS(Complementary Metal Oxide Semiconductor)transistor will moderate,the procedure *** the forthcoming article,a ring oscillator with fixed capacitor(1 pF)and with variable capacitors(1 to 100 pF)is *** frequency analysis with different capacitor is *** total delay of 3-stage oscillator is 4.82 ns with 5.2 MHz oscillation *** overall Power dissipation of the circuit is 1.852μWat 1 V *** simulation analysis is performed on 45 nm CMOS technology with both transistor width are 278 and 420 nm.

关键词： Ring oscillator power dissipation delay frequency sweep capacitor

Relationships between morphological descriptors and RAPD markers for assessing genetic variability in Hippophae rhamnoides L.

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Forestry Studies in China 2012年第2期14卷 137-144页

作者： rachana RANA Poonam SHIRKOT Department of Biotechnology Dr.YS Parmar University of Horticulture and ForestryNauniSolan 173230(Himachal Pradesh)India

Knowledge of genetic relatedness among accessions of germplasm is necessary for the development of breeding strategies to produce improved cultivars. The present investigation on Hippophae rhamnoides was carried out to assess its genetic variability in Himachal Pradesh, India, by employing morphological and RAPD markers. Different areas of Himachal Pradesh were surveyed and eight sites were finally selected Twenty four genotypes were selected for further studies, i.e., three genotypes from each site. On the basis of morphological studies, the genotypes of the Ropa site （Kinnaur） were considered elite genotypes. To assess the variability at the molecular level, RAPD patterns were studied by random primers. The total number of bands amplified was 607, out of which 487 bands were identified as polymorphic, depicting 80.23 per cent variability. Six unique bands were produced from three primers （OPA- 05, OPA-10 and OPD-08） specific for five genotypes, including three genotypes of the Ropa site, Kinnaur District.

关键词： Hippophae rhamnoides morphological descriptors genetic variability RAPD-PCR

Modelling synergistic interactions between HER2, Sprouty2 and PTEN in driving prostate carcinogenesis

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Asian Journal of Andrology 2013年第3期15卷 323-327页

作者： Imran Ahmad Meiling Gao rachana Patel Hing Y Leung The Beatson Institute for Cancer Research Glasgow G61 1BD UK Institute for Cancer Sciences University of Glasgow Glasgow G61 1BD UK Department of Urology NHS Greater Glasgow and Clyde Glasgow G12 OYN UK

Prostate cancer remains a major global health issue and a major cause of mor-bidity and mortality in men worldwide. Activation of androgen receptor and inac- tivation of the tumour suppressor gene phosphatase and tensin homologue （PTEN） represent two major events in prostate carcinogenesis. Using a range of clinical resources, in vitro and in vivo models, we explored potential complex interactions among receptor tyrosine kinases （such as HER2/3 and EGFR） and tumour suppressor genes, namely,

关键词： CELL-PROLIFERATION MOLECULAR-GENETICS CANCER SENESCENCE DNA SUPPRESSION MORTALITY BINDING

Non-cirrhotic hepatocellular carcinoma in chronic viral hepatitis: Current insights and advancements

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World Journal of Gastroenterology 2021年第24期27卷 3466-3482页

作者： Abhilash Perisetti Hemant Goyal rachana Yendala Ragesh B Thandassery Emmanouil Giorgakis Department of Internal Medicine Division of GastroenterologyUniversity of Arkansas for Medical SciencesLittle RockAR 72205United States Department of Internal Medicine Macon University School of MedicineMaconGA 31207United States Department of Hematology and Oncology Conway Regional Health System(CRHS)ConwayAR 72034United States Department of Gastroenterology and Hepatology Central Arkansas Veterans Healthcare SystemLittle RockAR 72205United States Department of Transplant University of Arkansas for Medical Sciences Little RockAR 72205United States

Primary liver cancers carry significant morbidity and *** carcinoma(HCC)develops within the hepatic parenchyma and is the most common malignancy originating from the *** 80%of HCCs develop within background cirrhosis,20%may arise in a non-cirrhotic milieu and are referred to non-cirrhotic-HCC(NCHCC).NCHCC is often diagnosed late due to lack of *** addition,the rising prevalence of non-alcoholic fatty liver disease and diabetes mellitus have increased the risk of developing HCC on noncirrhotic *** infections such as chronic Hepatitis B and less often chronic hepatitis C with advance fibrosis are associated with *** individuals may have Hepatitis B core antibodies and occult HBV infection,signifying the role of Hepatitis B infection in *** the effectiveness of current antiviral therapies,surgical techniques and locoregional treatment options,nowadays such patients have more options and potential for ***,these lesions need early identification with diagnostic models and multiple surveillance strategies to improve overall *** understanding of the NCHCC risk factors,tumorigenesis,diagnostic tools and treatment options are critical to improving prognosis and overall outcomes on these *** this review,we aim to discuss NCHCC epidemiology,risk factors,and pathogenesis,and elaborate on NCHCC diagnosis and treatment strategies.

关键词： Cirrhosis Hepatic fibrosis Non-alcoholic liver disease Primary liver cancer Hepatocellular carcinoma Hepatoma Liver cancer Hepatitis B virus Hepatitis C virus Liver resection Liver transplantation

The correlation between insulin and OCT-6 transcription factor in Schwann cells and sciatic nerve of diabetic rats

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Genes & Diseases 2018年第2期5卷 130-136页

作者： Mallahalli S.Manu Kuruvanthe S.rachana Gopal M.Advirao Department of Biochemistry Davangere UniversityDavangereKarnatakaIndia

Insulin signal is one of the vital signaling cascade required for Schwann cells to myelinate the axons of peripheral nervous system(PNS).Myelin formation of peripheral nerve is a complex molecular event controlled by different neurotrophic and transcription *** altered or failure in this signaling progression is one of the reasons behind the demyelination of peripheral neurons in diabetic peripheral neuropathy(DPN).The Schwann cell in PNS includes POU domain transcription factor OCT-6 *** factor is considered as crucial for the initiation and enhancement of myelination during nerve *** know the importance of OCT-6 gene,here we studied the long term expression of OCT-6 nuclear protein in sciatic nerve of normal and diabetic neuropathic *** for the first time we elucidated the role of insulin in controlling the expression of OCT-6 in hyperglycemic Schwann cells and sciatic nerve of diabetic neuropathic *** results shows that,there will be long term OCT-6 expression in sciatic nerve of adult rats and also their significant decrease is observed in the diabetic ***,addition of Insulin for primary Schwann cells and diabetic rats shows the increased OCT-6 expression in both in vivo and in *** these results indicate the failure of OCT-6 support in neuropathy and also the importance of insulin signaling cascade in the expression of OCT-6 transcription factor.

关键词： Diabetic peripheral neuropathy Insulin OCT-6 Schwann cells Sciatic nerve

Sarcopenia in hepatocellular carcinoma:Current knowledge and future directions

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World Journal of Gastroenterology 2022年第4期28卷 432-448页

作者： Abhilash Perisetti Hemant Goyal rachana Yendala Saurabh Chandan Benjamin Tharian Ragesh BabuThandassery Department of Internal Medicine Gastroenterology and Hepatology DivisionUniversity of Arkansas for Medical SciencesLittle RockAR 72205United States Department of Interventional Oncology and Surgical Endoscopy Parkview HealthFort WayneIN 46825United States Department of Internal Medicine The Wright Center for Graduate Medical EducationThe Wright Center for Graduate Medical EducationScrantonPA 18501United States Department of Hematology and Oncology Conway Regional Medical CenterConwayAR 72034United States Department of Internal Medicine Gastroenterology and Hepatology DivisionCHI Creighton University Medical CenterOmahaNE 68107United States Department of Medicine Central Arkansas Veterans Healthcare SystemLittle RockAR 72205United States

Liver cancer is the second most occurring cancer worldwide and is one of the leading causes of cancer-related *** carcinoma(HCC)is the most common(80%-90%)type among malignant liver *** occurs very early in HCC and can predict and provide an opportunity to improve muscle health before engaging in the treatment options such as loco-regional,systemic,and transplant *** prognostic stating systems have been developed in HCC,such as Barcelona Clinic Liver Cancer,Child-Pugh score and Albumin-Bilirubin ***,the evaluation of patients’performance status is a major limitation of these scoring *** this review,we aim to summarize the current knowledge and recent advances about the role of sarcopenia in cirrhosis in general,while focusing specifically on ***,the role of sarcopenia in predicting clinical outcomes and prognostication in HCC patients undergoing loco-regional therapies,liver resection,liver transplantation and systematic therapy has been discussed.A literature review was performed using databases PubMed/MEDLINE,EMBASE,Cochrane,Web of Science,and CINAHL on April 1,2021,to identify published reports on sarcopenia in *** can independently predict HCC-related mortality especially in patients undergoing treatments such as loco-regional,surgical liver transplantation and systemic *** research is focused on evaluating a balance of anabolic and catabolic pathways responsible for muscle *** clinical studies have shown promising results in methods to improve sarcopenia in HCC which can potentially increase prognosis in these *** sarcopenia occurs very early in HCC,it can predict and provide an opportunity to improve muscle health before engaging in the treatment options such as loco-regional,systemic,and transplant ***,sarcopenia measurement can obviate the confounding caused by the abdominal ascites in these *** use of sarcopenia can

关键词： Sarcopenia Skeletal muscle Hepatocellular carcinoma Cirrhosis Outcomes Liver cancer