Research Plus Journals (RPJ)
Not a member yet
364 research outputs found
Sort by
Minimized Leak Casing for Shale Gas Exploitation
Get PDFThe goal of present study is to determine most impermeable structure against shale gas leaks around extraction wells. This rests upon double tubing and the possibility to guarantee the distance in between the two tubes all along their path underground for injecting a protecting sealing cement in the interval domain between the two tubes. Proposed insertion strategy consisting in mounting a four rolling balls ring at the head of each inner tube segment has been discussed. During insertion the balls are rolling (and sliding) on inner surface of outer tube. Most favorable conditions for simultaneous longer rolling contact and buckling and deformation avoidance during inner tube insertion have been set up to establish the proof of principle of present strategy. They are explicitly fixing the acceptable window value of pushing insertion force and the minimum value of inner tube thickness so that the operation can be safely conducted in terms of all other system parameters. Global casing optimization by studying different materials, junction types and full system architecture will be discussed elsewhere
Cooperation vs. Non-Cooperation Basedrouting Protocols in WBAN
Get PDFDesign of routing protocols has seen remarkableadvancement in the field of Wireless Body Area Networks(WBANs).These protocols work to enhance the performance ofWBAN by focusing on routing, energy efficiency and end-to-enddelay. As these protocols can be categorized in a variety of waysaccording to the mechanisms and functionalities they follow,hence it becomes important to understand their principal ofoperations. In this research, we have selected some recentrouting protocols in the field of WBAN and presented acomparative analysis according to the categories on which theyrely. Also a detail analysis of their key advantages and flaws arealso identified in this research
Efficient Parameterized Word Matching Using Bit-Parallelism and Partitioning the Text
Get PDFWord matching problem is to find all the exact occurrences of a pattern P[0...m-1] in the text T[0...n-1], where P neither contains any white space nor preceded and followed by space. In the parameterized word matching problem, a given word P[0...m-1] is said to match with a sub-word t of the text T[0...n-1], if there exists a one-to-one correspondence between the symbols of P and the symbols of t. Exact Word Matching (EWM) problem has been previously solved by partitioning the text into number of tables in the pre-processing phase and then applying either brute force approach or fast hashing during the searching process. This paper presents an extension of EWM problem for parameterized word matching. It first split the text into number of tables in the pre-processing phase and then applying prev-encoding and bit-parallelism technique, Parameterized Shift-Or (PSO) during the searching phase. Experimental results show that this technique performs better than PSO
Knowledge and Practice Regarding Postnatal Care among Mothers Residing In Selected Slum Area of Dharan, Nepal
Get PDFPostnatal care is one of the most important maternalhealth-care services for not only prevention of impairment anddisabilities but also in reduction of maternal mortality. Safemotherhoodreport also highlights that the majority of womenin developing countries receive almost no postpartum care. Adescriptive cross sectional study design was adopted for thisstudy. The sample size was 60 and purposive sampling methodwas adopted to select the ward and mothers meeting theinclusion criteria. Data were collected by using pre-tested; semistructuredinterview schedule. The study showed that themedian percentage of overall knowledge regarding postnatalcare among mothers was 51% and that of practices regardingpostnatal care among mothers was 33.3%. This showed thatthere was lack of practices in comparison to Knowledge. Therewas significant association of knowledge regarding postnatalcare with respondents’ level of education (p value= 0.031),whereas there was no significant association between practicesregarding postnatal care with other socio-demographicvariables. Knowledge regarding postnatal care had significantpositive correlation with practice that means when knowledgeincreased practice also increased. The study conclude that thereis knowledge regarding postnatal care among mothers likepostnatal checkup, hygiene, birth spacing, additional diets,complications and danger signs;Whereas there is still lack of knowledge among mothersregarding postnatal period, postnatal exercise, earlyambulation. There is difference in the overall knowledge (57%)and practices (68%) regarding postnatal care among mothers
Effect of Nutrient Concentration and pH on Growth and Nutrient Removal Efficiency of Duckweed (Lemna Minor) From Natural Solid Waste Leachate
Get PDFThis study aims to investigate the effect of nutrientconcentration and pH of leachate on growth and nutrientremoval efficiency of duckweed (Lemna minor). A batchexperiment was conducted using pH range of 4-10 and twoinitial leachate dilutions with nutrient concentrations of N (90and 20 mg L -1) and P (76 and 16 mg L-1) and effect of pH andinitial nitrogen (N) and phosphorous (P) contents of naturalleachate was investigated on growth and nutrient removalefficiency of Lemna minor. Nutrient removal rates of duckweedincrease with an increase in initial nutrient concentration ofleachate at all pH levels. At both leachate dilutions, pH range of6-8 with an optimum of 7.1 is good for nutrient removalefficiency of duckweed from leachate. The highest rates ofnitrogen (1.22 g m-2 day-1) and phosphorous (0.95 g m-2 day-1)removal were achieved from more concentrated leachate at pH7.1. Growth rate of duckweed decreases with an increase ininitial nutrient concentration of leachate at all pH levels.Maximum growth rate of duckweed (19.6 g m2 day-1) wasachieved at pH 7.1 from less concentrated leachate. Nitrogenand phosphorous uptake in duckweed biomass was higher inless concentrated leachate at all pH values. Optimum pH for Nand P uptake by Lemna minor is 7.1 at both leachate dilutions.At this pH duckweed showed 94 % and 91 % uptake of N and Prespectively from less concentrated leachate
Exploring the Intertwined Roles of APOE and ABC Genes in the Cognitive Decline of Alzheimers
Get PDFAlzheimer disease (AD)is one of the most common causes of dementia in individuals older than 60 years. Several susceptibility genes for AD have been reported earlier, but by far,the strongest genetic risk factor for late onset Alzheimer disease (LOAD) is apolipoprotein E (APOE) genotype, with the ε4 allele being an AD risk factor and the ε2 allele being protective. Therapeutic strategies based on APOE and APOE receptors should aim to target influencing APOE/Aβ interactions, APOE structure, APOE lipidation, LDLR receptor family member function, and signaling. This paper will explain the intertwined roles of ABCA1 and APOE in understanding the molecular and pathophysiological mechanisms of Alzheimers disease. It will extensively describe the normal and disease-related biology connecting APOE, APOE receptors in AD and provide novel insights into AD prognosis and treatment
Determination of Sodium Fluoride in Dental Mouth Wash and Oral Multivitamin Formula Using RP-HPLC Precolumn Derivatization Reaction
Get PDFAn accurate, selective and sensitive reversed phase-HPLC method has been developed and validated for selective determination of sodium fluoride in dental mouth wash and oral multivitamin formula. The method was based on a precolumn derivatization reaction of sodium fluoride with triphenyl silyl hydroxide in acidic conditions then the product (triphenyl silyl fluoride) was extracted into n-heptane. Limit of quantification and limit of detection for sodium fluoride were found to be 1.07 and 0.35 µg/ml; respectively. A Zorbax® eclipse HC-C18 column (250 mm x 4.6 mm x 5 μm) was used for separation with acetonitrile: water (75:25, v/v) as the mobile phase (flow rate 0.5 ml/min), temperature was adjusted at 40˚C with detection wavelength of 222nm. The retention time was found to be about 8.6 min. The method exhibited a wide linear range of response from 1-300µg/ml with a correlation coefficient of 0.9998 and percentage recovery of 99.50 ± 0.792. Recoveries in dosage forms were found to be 99.33± 0.818 and 98.76 ± 0.930 for dental mouth wash and oral multivitamin formula; respectively. The developed analytical method has been validated for selectivity, linearity, precision, accuracy, and robustness according to ICH guidelines. The developed method could be successfully employed for routine analysis of fluoride ion in pharmaceutical formulations as well as in a wide range of matrices due to high selectivity of the method
Modeling the Efficiency Equation of a Solar Box Cooker
Get PDFThe mundane task undertaken by household in search for source of energy (i.e. wood) for cooking, coupled with the glaring implications of defrost rations associated with it, this study deals with the modeling of the efficiency of a solar cooker. The authors reviewed previous work on same subject in different locations around the world. An initial study begins with a basic equation representing heat change by a body. The methodology employed involved the calculation of energy output from a solar cooker which was based on the change in temperature, mass and specific heat capacity of the water used. The paper however outline how people consistently involved themselves in cutting down trees all in attempt to look for energy for cooking food with less or no concern to consequences of their action in an attempt to reduce or completely eradicate the above action, a mathematical modeling has been developed which can be used by engineers to adjust certain parameters before the real construction began. The equation is therefore found to be useful in calculating the efficiency of any solar cooker to be constructed under the same condition
Identification of Cuscuta Campestris Yuncker in UAE: Study of Bar Code Loci- Rbcl, Matk and Trnh-Psba in the UAE and Egyptian Cultivars and In the Respective Host Plants Basil and Jute
Get PDFCuscuta campestris is a stem holoparasite. We observed Cuscuta parasite on basil host plant Ocimum basilicum, in Al Mohadub Umm Al Quwain, UAE. The parasite was pale green in color, twined around the host in anti-clock wise direction, with white flowers that had green ovaries at maturity. Based on the morphology and floral structures, we identified the parasite as C. campestris Yuncker. To authenticate the species, three “Bar-code loci†viz, rbcL, matK and inter-spacer region trnH-psbA were studied. A portion of rbcL locus and the trnH-psbA non-coding spacer region seem to be intact, revealed by PCR amplification and sequencing, while three sets of primers failed to amplify the maturase K locus. Although the stem and floral structures were light green in color, RuBisCo protein could not be detected in polyacrylamide gels, indicating its total dependency on the host at that stage of development. To validate thus obtained results, frozen samples of C. campestris were collected from Egypt and the three bar code loci (rbcL, matK and trnH-psbA) were amplified with the same set of primers; the PCR products were sequenced. There was 100% similarity with respect to the sequenced loci (rbcl and trnH-psbA) between the two cultivars of C. campestris Yuncker. Sequences were deposited in Genbank with accession numbers KXO15762 (C. campestris, UAE) and KXO15761 (C. campestris, Egypt). C. campestris is being reported for the first time from Al Mohadub Umm Al Quwain, UAE. There is no difference in both the candidate bar code gene loci rbcL and trn-H psbA between the UAE and Egyptian cultivars of Cuscuta campestris and the region is conserved
Comparing Software Quality Models: An Overview
Get PDFSoftware quality models are well-accepted means tosupport quality management of software systems. Over the lastyears many quality models are proposed and applied withvarying aspects. But quality models are still criticized because ofyet to be solved issue of little practical adoption of these models.It is defined and discussed in literature that “what are qualitymodels?†but the key point is “how can quality models beadopted in practice?†Software quality models are used todetermine the functionality, quality attributes, internal andexternal characteristics of the system. This paper aims to givethe overview of software quality model by answering questionslike what are these quality models?, how these can beimplemented? and , how these software quality models can becompared? It also highlights the issues and proposed techniques,models and approaches of these models that are identified fromliterature survey