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Jameel, M., B. Darmas i AL Baker. "Trend towards Primary Closure Following Laparoscopic Exploration of the Common Bile Duct". Annals of The Royal College of Surgeons of England 90, nr 1 (styczeń 2008): 29–35. http://dx.doi.org/10.1308/003588408x242295.
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INTRODUCTION The aim of this study was the assessment of patient outcome, peri-operative complications, length of stay and duration of operation after laparoscopic primary closure of the common bile duct (CBD) compared with choledochotomy with T-tube drainage and trans-cystic exploration. PATIENTS AND METHODS Analysis of prospectively collected data on 71 explorations of the common bile duct between July 2001 and March 2006. RESULTS A total of 71 patients had exploration of the CBD. Within this group, 12 were referred after failed endoscopic retrograde cholangiopancreatography (ERCP). The methods of exploration included trans-cystic (9 cases), choledochotomy with Ttube (12), and choledochotomy with primary closure (50). CBD stones were found in 66 patients. In the remaining cases, we found a stricture in 1, debris in 2, and dilatation of the CBD without a stone in 2. There were 5 conversions to open technique and 3 patients required postoperative ERCP (1 with permanent stenting). Peri-operative complications included T-tube (3), primary closure group (9), and trans-cystic (0). There was no statistical significant difference (Chi-square test, P = 0.296) between the groups. There was a trend towards a shorter length of stay in the primary closure group as compared with the trans-cystic and T-tube groups of 4.16, 4.44, and 6.33 days, respectively. However, it did not reach statistical significance (one-way analysis of variance with Boneferroni correction, mean difference between groups 1.89, 0.28, 2,17, statistical significance at P < 0.05). The shortest operating time was in the primary closure group (95.92 min) which was statistically significant (P < 0.001). We did not use a biliary drain in the last 48 patients. CONCLUSIONS Primary laparoscopic closure of the CBD is safe and results in a reduction in operating time. Choledochoscopy ensures clearance of the CBD and eliminates the need for T-tube.
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Vaughan, P. S. "NORTH WEST SHELF 3-D SEISMIC—A DECADE OF DEVELOPMENTS". APPEA Journal 33, nr 1 (1993): 315. http://dx.doi.org/10.1071/aj92022.
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Woodside as Operator, on behalf of three Joint Venture groups, over the last decade has acquired eight 3-D seismic surveys covering some 4 600 km2 over the Rankin Trend and Dampier Sub-Basin Production Licences and Exploration Permits on the North West Shelf of Australia. This area represents approximately 45 per cent coverage of the present Woodside operated acreage in the area. The acquisition, processing and interpretation technology and also the benefits derived from the 3-D technique have changed remarkably since the first North West Shelf 3-D survey in 1981. This paper focusses on the main technological developments in 3-D seismic, particularly involving multi-source and streamer technology, increased spatial sampling and interpretation techniques which have changed the role of 3-D seismic in Exploration strategies through the 1980s and into the 1990s.
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Zhang, Chun Hua, Guo Ying Meng, Guang Hua Liu, Li Min Sheng i Yan Fu Huang. "Introduction of Near-Bit Geosteering Drilling Technology and Instrument Application in Thin Oil Exploration". Advanced Materials Research 228-229 (kwiecień 2011): 889–93. http://dx.doi.org/10.4028/www.scientific.net/amr.228-229.889.
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The near-bit geosteering drilling technology is a new high-tech .It integrats the techniques of drilling, logging and reservoir engineering. The paper introduced the application of this technology in oil exploration. CGDS is a kind of production of this technology applications. The paper introduced the structure ,function, parameters of CGDS production and its application in oil field. CGDS is recognized as the high and new technique in 21 century which ensures you to achieve the best place of a wellbore within a reservoir by providing geological, engineering parameter measurements and while drilling monitoring. With excellent ability of identification of hydrocarbon reservoir and direction guide, CGDS assists you to adjust and control the wellbore trace in real time according to the information of formation features. Through the introduction of this instrument,We can know more about the near-bit geosteering drilling technology The application prospect and development trend of the geosteering drilling system were also discussed.
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Gruzdev, R. V. "PROCESSING OF GRAVITY ANOMALIES BASED ON FIELD APPROXIMATIONS BY THE LEAST SQUARES METHOD (ON THE EXAMPLE OF EASTERN TRANSBAIKALIA)". Geology and mineral resources of Siberia, nr 1 (2023): 44–49. http://dx.doi.org/10.20403/2078-0575-2023-1-44-49.
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An alternative technique for gravimetric data processing using approximations of the gravity anomaly field by the reduction surface is described. The approach peculiarity is the representation of reductions in the form of regional trend, where the correction for an interbedded layer is excluded without a certain density value. The field approximation algorithm is based on the least squares method. The results of research, conclusions and recommendations for the gravity anomalies at other geological exploration targets are presented.
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Huang, Shi Ming, David C. Yen, Ting Jyun Yan i Yi Ting Yang. "An Intelligent Mechanism to Automatically Discover Emerging Technology Trends: Exploring Regulatory Technology". ACM Transactions on Management Information Systems 13, nr 2 (30.06.2022): 1–29. http://dx.doi.org/10.1145/3485187.
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Technology trend analysis uses data relevant to historical performance and extrapolates it to estimate and assess the future potential of technology. Such analysis is used to analyze emerging technologies or predict the growing markets that influence the resulting social or economic development to assist in effective decision-making. Traditional trend analysis methods are time-consuming and require considerable labor. Moreover, the implemented processes may largely rely on the specific knowledge of the domain experts. With the advancement in the areas of science and technology, emerging cross-domain trends have received growing attention for its considerable influence on society and the economy. Consequently, emerging cross-domain predictions that combine or complement various technologies or integrate with diverse disciplines may be more critical than other tools and applications in the same domain. This study uses a design science research methodology, a text mining technique, and social network analysis (SNA) to analyze the development trends concerning the presentation of the product or service information on a company's website. This study applies regulatory technology (RegTech) as a case to analyze and justify the emerging cross-disciplinary trend. Furthermore, an experimental study is conducted using the Google search engine to verify and validate the proposed research mechanism at the end of this study. The study results reveal that, compared with Google Trends and Google Correlate, the research mechanism proposed in this study is more illustrative, feasible, and promising because it reduces noise and avoids the additional time and effort required to perform a further in-depth exploration to obtain the information.
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Zhao, Yijie. "Bigdata Technique Implementation in Bank Industry: Evidence from China". Highlights in Science, Engineering and Technology 49 (21.05.2023): 272–79. http://dx.doi.org/10.54097/hset.v49i.8518.
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With the continuous maturity and progress of cloud computing, intelligent tools, Internet of Things technology and other technologies, society has entered the era of big data, which is both a challenge and an opportunity for all traditional industries. As the pillar of national economy, the financial industry should comply with the trend of the time, comprehensively analyze the impact, use big data to analyze and mine effective information and reasonably apply it to the operation of banks. Finding the path of change is the key to foster the synchronous and long-term development of the banking industry in the new era. To achieve the aim of promoting the innovation and reform of the banking industry effectively, it’s necessary to dig the answers from the examples of big data application. This study introduces the basic concepts and analysis methods of big data, shows the typical application of big data in Chinese banks, mines the convergence between banking and big data, analyzes the existing problems of big data finance and puts forward solutions. In addition, this research looks forward to the future intelligent and regular big data technique implementation in the financial industry. Overall, these results shed light on guiding further exploration of the big data implementation in financial industry.
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Ahn, Dongbin, i Ji Hye Kwak. "Role and Recent Trend of Intraoperative Parathyroid Hormone Monitoring During Parathyroidectomy in Patients With Primary Hyperparathyroidism". Korean Journal of Otorhinolaryngology-Head and Neck Surgery 65, nr 5 (21.05.2022): 253–59. http://dx.doi.org/10.3342/kjorl-hns.2022.00332.
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In the last few decades, the standard surgical treatment for primary hyperparathyroidism (PHPT) has shifted from bilateral neck exploration to focused/minimally invasive parathyroidectomy (FMIP). This shift was accelerated by the introduction of intraoperative parathyroid hormone (IOPTH) monitoring, which can provide intraoperative information regarding the localization and complete excision of the pathological parathyroid gland during FMIP. Since the first clinical application of the IOPTH assay in 1991, IOPTH monitoring has substantially improved to date to increase its performance and availability. In addition, the clinical applications of IOPTH changed with the needs of actual clinical practice, although the fundamental concept and technique remained unchanged. In this review, we discuss the role of IOPTH monitoring in the surgical management of PHPT based on the results of contemporary studies and summarized the major issues regarding IOPTH.
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Farsaci, Francesco, Ester Tellone, Antonio Galtieri i Silvana Ficarra. "Thermodynamics Characterization of Lung Carcinoma, Entropic Study and Metabolic Correlations". Fluids 5, nr 4 (26.09.2020): 164. http://dx.doi.org/10.3390/fluids5040164.
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In recent years, the use of dielectric spectroscopy as an investigation technique to determine the chemical–physical characteristics of biological materials has had a great increase. This study used the non-equilibrium thermodynamics with internal variables theory to test the potential pathological features of lung cancer. After a brief exploration of the dielectric polarization concept highlighting some aspects that were used, some thermodynamic functions were obtained as functions of the frequency, both for lung tumor cells and physiological ones. Variations in the intensity of values but not in the trend of the curves were observed and this was attributed to the perturbing field. The trend of this field explains the behavior of phenomena described by other functions, as related to the frequencies of the perturbing field. Compared to the physiological ones, the cancer cells appeared to be “more predisposed” to conserve their state as characterized by minor entropy production, probably because this helped cells to obtain the required adenosine triphosphate (ATP) from the minimum amount of nutrients.
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K., Ganesh Kumar, Chamkha Ali J., Prasannakumara B.C. i Jyothi A.M. "Exploration of particle shape effect on Cu-H2O nanoparticles over a moving plate". International Journal of Numerical Methods for Heat & Fluid Flow 30, nr 4 (19.06.2019): 1867–79. http://dx.doi.org/10.1108/hff-10-2018-0539.
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Purpose This paper aims to explore particle shape effect on Cu-H2O nanoparticles over a moving plate in the presence of nonlinear thermal radiation. To characterize the effect, particle shape and viscous dissipation are considered. Convergent solutions for the resulting nonlinear systems are derived and the effects of embedded parameters of interest on velocity and temperature field are examined. Design/methodology/approach The Runge–Kutta–Fehlberg fourth-fifth order method along with shooting technique is used to solve the governing equations (6) and (7) with boundary conditions (8). A suitable finite value of η∞ is considered in such a way that the boundary conditions are satisfied asymptotically. Findings The results show an increase in both the heat transfer and thermodynamic performance of the system. However, among the three nanoparticle shapes, disk shape exhibited better heat transfer characteristics and heat transfer rate. On the other hand, the velocity profile enhances with increasing values of ϕ in the first solution, but the opposite trend was found in the second solution. Originality/value The present paper deals with an exploration of particle shape effect on Cu-H2O nanoparticles over a moving plate in the presence of nonlinear thermal radiation. To characterize the effect, particle shape and viscous dissipation are considered. Convergent solutions for the resulting nonlinear systems are derived and the effects of embedded parameters of interest on velocity and temperature field are examined. The skin friction coefficient and Nusselt number are numerically tabulated and discussed. The results show an increase in both heat transfer and thermodynamic performance of the system. However, among the three nanoparticle shapes, disk shape exhibited better heat-transfer characteristics and heat-transfer rate. On the other hand, the velocity profile enhances with increasing values of ϕ in the first solution, but the opposite trend was found in the second solution.
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Lucazeau, Francis, i Hammed Ben Dhia. "Preliminary heat-flow density data from Tunisia and the Pelagian Sea". Canadian Journal of Earth Sciences 26, nr 5 (1.05.1989): 993–1000. http://dx.doi.org/10.1139/e89-080.
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Heat-flow density values at 78 sites in Tunisia and the Pelagian Sea are derived from oil exploration wells. Bottom-hole temperatures (BHT) are systematically corrected for mud circulation cooling effects either by a Horner technique when several temperature records are available at a given depth or by a statistical method based on the comparison of all BHT with test temperatures (DST) that are representative of the actual formation temperatures. Thermal conductivities are estimated from detailed studies of stratigraphic and geophysical logs. An inverse technique is used to estimate heat-flow density for each borehole, as well as interpolated temperatures at constant depths. Results are discussed with maps that include heat-flow density data in neighbouring areas (Algeria and the Strait of Sicily). The general trend corresponds remarkably to the recent structural evolution of the Tunisian margin with high values in the Pelagian Sea and decreasing values toward the stable platform.
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Oh, Young Beom. "Trend Analysis of Photovoice Research on Pedagogy Area in Korea". Korean Association For Learner-Centered Curriculum And Instruction 23, nr 9 (15.05.2023): 731–48. http://dx.doi.org/10.22251/jlcci.2023.23.9.731.
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Objectives The purpose of this study is to analyze the trend of photovoice research in the field of education in Korea.
Methods For this purpose, 21 papers in academic journals published in Korea were selected. Eight analysis criteria used in this study (research purpose, research participants, research period, questioning technique, data collection method, data analysis method, validity pictorial method, and use of research results) were selected.
Results As a result of analyzing the papers published from 2014 to 2022 according to the analysis criteria, the following main conclusions were obtained. The purpose of the study was mainly focused on experience analysis and recognition exploration. Most of the research participants were from the underprivileged or marginalized, and the largest number of research participants was 6 to 10, and the research participants were recruited mainly through the purposeful sampling method. As for the data collection method, focus group interviews were applied in 14 studies, and the three-step analysis method (selecting, contextualizing, and codifying) was mainly used for data analysis. As a way to secure validity, peer review and expert review were conducted in many studies, and the use of research results was not specifically mentioned in many studies.
Conclusions Based on the analysis results presented in this study, the direction and implications of the research on photovoice were discussed.
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Rahman, Aqeel, Inass Almallah i Ahmed Mousa. "Lineaments Tracing of Magnetic Sources Depending on the Aeromagnetic Data: Case Study in Salman Basin and Surrounding Areas, Southern Desert of Iraq". Iraqi Geological Journal 55, nr 1D (30.04.2022): 184–98. http://dx.doi.org/10.46717/igj.55.1d.14ms-2022-04-30.
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This study deals with the processing and analysis of aeromagnetic data for an area covering the region of Salman Basin within AL- Muthanna, Iraq. The objective of this study is to use the available satellite images and aeromagnetic data to investigate the boundaries of geological structures. For further understanding of the tectonic of the study area, the Centre for Exploration Targeting Grid Analysis extension which is available in Oasis montaj software was applied to the data. It is proposed that it provides unbiased results, but to check the results Tilt Derivative or local phase derivative is used where the zero-contour line of the tilt derivative strongly delineates the edges of structures. Also, the drainage pattern for the basin is done using Geographic Information System and Digital Elevation Model raster to see if the drainage is affected by the subsurface lineaments that are determined using the Centre for Exploration Targeting technique. As a result, the deep main linear features follow the general trend of the main faults that formed the Salman Basin. The new lineaments were discovered using the Exploration Targeting grid analysis, zero contour of. There are two systems of lineaments in the present study area. The first set is taken the NW-NE direction perpendicular to the extensional structures, while the second set has the NS-EW direction.
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Hafeez, Tharwat H. Abdel, Mohamed A. S. Youssef i Waheed H. Mohamed. "Utilization of airborne gamma ray spectrometric data for geological mapping and radioactive mineral exploration of Gabel Umm Tineidba area, south eastern desert, Egypt". World Journal of Engineering 12, nr 2 (1.04.2015): 149–60. http://dx.doi.org/10.1260/1708-5284.12.2.149.
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The present work utilizes airborne gamma ray spectrometric data in a trial to refine surface geology of igneous, metamorphic and sedimentary rocks, detect any radioactive mineralization at Gabel Umm Tineidba area South Eastern Desert, Egypt. The study area is covered by rock exposures ranging in age from the Precambrian to Quaternary. Airborne gamma ray spectrometry can be very helpful in mapping surface geology. This provides estimates of the apparent surface concentrations of the most common naturally occurring radioactive elements, such as potassium (K), equivalent uranium (eU) and equivalent thorium (eTh). This is based on the assumption that, the absolute and relative concentrations of these radioelements vary measurably and significantly with lithology. The composite image technique is used to display simultaneously three parameters of the three radioelement concentrations and their three binary ratios on one image. The technique offers much in terms of lithological discrimination, based on color differences and showed efficiency in defining areas, where different lithofacies occur within areas mapped as one continuous lithology. The integration between surface geological information and geophysical data led to detailing the surface geology and the contacts between different rock units. Significant locations or favourable areas for uranium exploration are defined, where the measurements exceed (X+2S), taking X as the arithmetic mean of eU, eU/eTh and eU/K measurements and S as the standard deviation corresponding to each variables. The study area shows the presence of fifteen relatively high uraniferous zone. In addition, the trend analysis based on the total count map and the published geological map shows that, most of the well-developed structural lineaments have NS, ENE, NNE and NNW trends.
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Shirazi, Aref, Ardeshir Hezarkhani i Amin Beiranvand Pour. "Fusion of Lineament Factor (LF) Map Analysis and Multifractal Technique for Massive Sulfide Copper Exploration: The Sahlabad Area, East Iran". Minerals 12, nr 5 (28.04.2022): 549. http://dx.doi.org/10.3390/min12050549.
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Fault systems are characteristically one of the main factors controlling massive sulfide mineralization. The main objective of this study was to investigate the relationship between fault systems and host lithology with massive sulfide copper mineralization in the Sahlabad area, South Khorasan province, east of Iran. Subsequently, the rose diagram analysis, Fry analysis, lineament factor (LF) map analysis and multifractal technique were implemented for geological and geophysical data. Airborne geophysical analysis (aeromagnetometric data) was executed to determine the presence of intrusive and extrusive masses associated with structural systems. Accordingly, the relationship between the formation boundaries and the fault system was understood. Results indicate that the NW-SE fault systems are controlling the lithology of the host rock for copper mineralization in the Sahlabad area. Hence, the NW-SE fault systems are consistent with the main trend of lithological units related to massive sulfide copper mineralization in the area. Additionally, the distance of copper deposits, mines and indices in the Sahlabad area with fault systems was calculated and interpreted. Fieldwork results confirm that the NW-SE fault systems are entirely matched with several massive sulfide copper mineralizations in the area. This study demonstrates that the fusion of lineament factor (LF) map analysis and multifractal technique is a valuable and inexpensive approach for exploring massive sulfide mineralization in metallogenic provinces.
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Idris Augie, Abdulrahaman, A. Adamu, K. A. Salako, A. Alkali, A. M. Narimi, M. N. Yahaya i A. A. Sani. "ASSESMENT FOR GOLD MINERALISATION POTENTIAL OVER ANKA SCHIST BELTS NW NIGERIA, USING AEROMAGNETIC DATA". FUDMA JOURNAL OF SCIENCES 5, nr 4 (28.01.2022): 235–42. http://dx.doi.org/10.33003/fjs-2021-0504-810.
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High resolution aeromagnetic data combined with the geological settings of the study area were employed in delineating the structures that may host the gold mineral within the middle parts of Anka schist belts. These data were analysed, processed and interpreted using; reduction to magnetic equator (RTE), first and second vertical derivatives (FVD & SVD), geologic contact, analytic signal (AS), centre for exploration targeting (CET) and source parameter imaging (SPI) techniques. RTE technique was applied to prevent North-South signal in the data from dominating the results, due to the area falls under the low latitude. FVD and SVD maps shows major NE trend of the structures within study area. CET map revealed the regions with linear structures (lineament) which were trending South-Eastern regions of the study area. Geologic contact map has highlighted high density of structural contacts combined with junctions and intersections of different structures found within the area. AS map enhanced the variation in the magnetisation of the magnetic sources and also indicates the boundaries of anomaly texture. These techniques have revealed the regions that may host gold mineralisation potential areas to be; northern parts of Bukkuyum, Anka, Maru, Sakaba, Mariga, southern part of Wasagu/Danko. Most of the structures (lineaments) found within areas were associated with the vein of the mineralisation potential which plays important role in determine a gold mineral. Results from these techniques also correlated
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Qin, Yuehan, Xinle Zhang, Zhifang Zhao, Ziyang Li, Changbi Yang i Qunying Huang. "Coupling Relationship Analysis of Gold Content Using Gaofen-5 (GF-5) Satellite Hyperspectral Remote Sensing Data: A Potential Method in Chahuazhai Gold Mining Area, Qiubei County, SW China". Remote Sensing 14, nr 1 (28.12.2021): 109. http://dx.doi.org/10.3390/rs14010109.
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The gold (Au) geochemical anomaly is an important indicator of gold mineralization. While the traditional field geochemical exploration method is time-consuming and expensive, the hyperspectral remote sensing technique serves as a robust technique for the delineation and mapping of hydrothermally altered and weathered mineral deposits. Nonetheless, mineralization element anomaly detection was still seldomly used in previous hyperspectral remote sensing applications in mineralization. This study explored the coupling relationship between Gaofen-5 (GF-5) hyperspectral data and Au geochemical anomalies through several models. The Au geochemical anomalies in the Chahuazhai mining area, Qiubei County, Yunnan Province, SW China, was studied in detail. First, several noise reduction methods including radiometric calibration, Fast Line-of-sight Atmospheric Analysis of Spectral Hypercubes (FLAASH), Savitzky–Golay filter, and endmember choosing methods including Minimum Noise Fraction (MNF) transformation, matched filtering, and Fast Fourier Transform (FFT) transformation were applied to the Gaofen-5 (GF-5) hyperspectral data processing. The Spectrum-Area (S-A) method was introduced to build an FFT filter to highlight the spectral abnormal characteristics associated with Au geochemical anomaly information. Specifically, the Matched Filtering (MF) technique was applied to the dataset to find the Au geochemical anomaly abundances of endmembers with innovative large-sample learning. Then, Multiple Linear Regression (MLR), Partial Least Squares (PLS) regression, a Back Propagation (BP) network, and Geographically Weighted Regression (GWR) were used to reveal the coupling relationship between the spectra of the processed hyperspectral data and the Au geochemical anomalies. The results show that the GWR analysis has a much higher coefficient of determination, which implies that the Au geochemical anomalies and the spectral information are highly related to spatial locations. GWR works especially well for showing the regional Au geochemical anomaly trend and simulating the Au concentrated areas. The GWR model with application of the S-A method is applicable to the detection of Au geochemical anomalies, which could provide a potential method for Au deposit exploration using GF-5 hyperspectral data.
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Akram, Misbah, Muhammad Afzal, Zunaira Aziz, Farhat Ijaz i Asim Zia. "Exploration of Factors Influencing Maternal Choice Without Medical Indication for Caesarean Section". Pakistan Journal of Medical and Health Sciences 17, nr 2 (28.02.2023): 169–72. http://dx.doi.org/10.53350/pjmhs2023172169.
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Background: The rapid increase of caesarean sections has become the major public health problem. Caesarean section ratio is increasing day by day worldwide without knowing the factors with limited explanation that influence the rising trend without medical indications. Aims: To explore the driving factors which lead to the Caesarean Section and to evaluate the maternal choice without medical indication for Caesarean Section. Methodology: A Phenomenological qualitative approach was used with a semi structured open ended questionnaire. Sample size of ten pregnant women with a third trimester was used in this study. There was an individual in-depth interview with a time duration of 30-40 minutes. Purposive sampling technique was used in this study. Content analysis was done by using the Nvivo-10 software. Result: Participants were recruited from the urban and rural area. Interview session was 30-40 minutes which was convenient to the participant. All the interviews were audio tapes recorded. Interpretative Phenomenological analysis revealed five major themes which are: mother personal beliefs for caesarean section, lack of knowledge to make an informed choice, cultural and social influence, fear of labour pain, non-supportive behaviour of staff and management of health care system were made from these interviews. However, critical knowledge gaps were also observed among study obstetricians, particularly with regards to the indications for and timing of elective caesarean sections. Practical implication: The maternal choice of caesarean section without medical indications and the factors influencing the women decision-making process were complex. Therefore, these findings suggest that healthcare policy makers should attend to the factors that influence maternal choice about caesarean section and promote the normal vaginal birth among women. Conclusion: This study identifies the personal beliefs of mothers are the major factors for taking decisions regarding caesarean section. Furthermore, relative’s consultation with mother’s decision-making become the main influencer to conduct the caesarean section. There is the dire need to involve the relatives during the mother's antenatal period to support them to make the timely and right decision regarding the mode of birth. Keywords: Caesarean Section, Decision-Making, Influence, Factors, SVD, Pregnant Women
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Walayat, Noman, Jianhua Liu, Asad Nawaz, Rana Muhammad Aadil, María López-Pedrouso i José M. Lorenzo. "Role of Food Hydrocolloids as Antioxidants along with Modern Processing Techniques on the Surimi Protein Gel Textural Properties, Developments, Limitation and Future Perspectives". Antioxidants 11, nr 3 (28.02.2022): 486. http://dx.doi.org/10.3390/antiox11030486.
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Texture is an important parameter in determining the quality characteristics and consumer acceptability of seafood and fish protein-based products. The addition of food-based additives as antioxidants (monosaccharides, oilgosaccharides, polysaccharides and protein hydrolysates) in surimi and other seafood products has become a promising trend at an industrial scale. Improvement in gelling, textural and structural attributes of surimi gel could be attained by inhibiting the oxidative changes, protein denaturation and aggregation with these additives along with new emerging processing techniques. Moreover, the intermolecular crosslinking of surimi gel can be improved with the addition of different food hydrocolloid-based antioxidants in combination with modern processing techniques. The high-pressure processing (HPP) technique with polysaccharides can develop surimi gel with better physicochemical, antioxidative, textural attributes and increase the gel matrix than conventional processing methods. The increase in protein oxidation, denaturation, decline in water holding capacity, gel strength and viscoelastic properties of surimi gel can be substantially improved by microwave (MW) processing. The MW, ultrasonication and ultraviolet (UV) treatments can significantly increase the textural properties (hardness, gumminess and cohesiveness) and improve the antioxidative properties of surimi gel produced by different additives. This study will review potential opportunities and primary areas of future exploration for high-quality surimi gel products. Moreover, it also focuses on the influence of different antioxidants as additives and some new production strategies, such as HPP, ultrasonication, UV and MW and ohmic processing. The effects of additives in combination with different modern processing technologies on surimi gel texture are also compared.
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Sarkar, Tanmoy, i Tapas Pal. "REVISITING THE METHODOLOGICAL DEVELOPMENT IN SOIL EROSION RESEARCH". ENSEMBLE 2, nr 2 (5.06.2021): 145–65. http://dx.doi.org/10.37948/ensemble-2020-0202-a016.
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Soil erosion (by water) is a major land degradation process that may threat the Sustainable Development Goals (SDG) by its negative impact on environment and human well-being. Soil erosion research demands scientific methods, tools and techniques to assess soil erosion with more accuracy and reliability. Soil erosion research has had experienced crude field-based techniques in early twentieth century to model-based approaches since the 1970s and very recent machine learning and artificial intelligence models to predict soil erosion susceptibility and risk. The paper aims to review the trend in methodological development in soil erosion by water through time. The brief background of different approaches, their relative advantages and disadvantages are reviewed. Depending on the time of establishment and wide application the approaches are classified and represented as erosion plot/runoff approach, erosion pin technique followed by environmental tracer method and model approach in combination with Remote Sensing (RS) and Geographic Information System (GIS). Recent advancement in artificial intelligence and application of statistical techniques have a great potential to contribute in soil erosion research by identifying various degrees of susceptibility in large scale and also to quantify the erosion rate with high accuracy. The Remote sensing (RS) and Geographic Information System (GIS) contribute to develop regional scale data base with exploration of real time data and spatial analysis. The combination of RS & GIS and process-based models must be more effective than the traditional soil erosion model in the context of prediction with greater reliability and validity. The future research on soil erosion is better to focus on the theoretical analysis and development of erosion prediction model with more quantitative refinement and to model the future.
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Majeed, Muhammad, Aqil Tariq, Sheikh Marifatul Haq, Muhammad Waheed, Muhammad Mushahid Anwar, Qingting Li, Muhammad Aslam, Sanaullah Abbasi, B. G. Mousa i Ahsan Jamil. "A Detailed Ecological Exploration of the Distribution Patterns of Wild Poaceae from the Jhelum District (Punjab), Pakistan". Sustainability 14, nr 7 (23.03.2022): 3786. http://dx.doi.org/10.3390/su14073786.
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The purpose of this study was to investigate the taxonomic diversity, richness, and distribution patterns of Poaceae in relation to abiotic factors in the Jhelum district of the Pakistan Himalayas. We used a random sampling technique from 80 grids within 240 sites with a rich diversity of wild grasses and 720 quadrates in triplets from each site across the Jhelum district between 2019 and 2021 to collect data on grass species and the associated environmental factors and conditions. After evaluating the important value index for each plant taxa and for the environmental data, we analyzed the data using ordination and cluster analysis techniques. Fifty-two Poaceae taxa from twenty-nine genera were recorded within the study area. From a total of 52 recorded Poaceae species, 45 were native and 7 were invasive species. The life form (biological) showed the dominancy of 27 therophyte species, followed by 24 hemicryptophyte species, and 1 geophyte species. Microphyll had the leading leaf size spectra (27 species), followed by nanophyll (12 species), macrophyll (10 species), and leptophyll (3 species). The trend of the life cycle was the maximum (27 spp.) during the monsoon season, followed by spring (11 spp.), winter (8 spp.), and summer (6 spp.). The leading genera were Setaria with 9.61% of the species, followed by Panicum, Cenchrus, and Brachiaria with 7.69% of the species. Aristida and Echinochloa made up 5.76% of the species while Chrysopogon, Digitaria, Eragrostis, Pennisetum, and Poa made up 3.84% of the species. Other genera recorded single species. The leaf size spectra of grasses were dominated by microphylls (50%) followed by nanophylls (23.07%), macrophylls (19.23%), and leptophylls (7.69%). On the basis of the importance value index, the most dominant species was Cynodon dactylon (68), followed by Dichanthium annulatum (58), Brachiaria ramose (38), Dactyloctenium aegyptium (37), Eleusine indica (35), Saccharum bengalense (33), and Cenchrus biflorus (28). Two-way cluster analyses classified the grasses into three plant community associations based on the indicator plant species. Soil parameters as subsamples were tested for moisture, pH, EC, OM, macronutrients (CaCO3, N, P, and K), and saturation while the ordination analysis revealed that they had a significant (p ≤ 0.002) effect on vegetation associations. Overall, this study contributes to a better understanding of the influence of environmental factors on the composition and associations of grass species and the development of scientifically informed management solutions for the ecological restoration of degraded habitats in this Himalayan region.
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Gaufberg, Elizabeth, i Ray Williams. "Reflection in a Museum Setting: The Personal Responses Tour". Journal of Graduate Medical Education 3, nr 4 (1.12.2011): 546–49. http://dx.doi.org/10.4300/jgme-d-11-00036.1.
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Abstract Introduction We describe an educational innovation piloted by the director of education at a university art museum and a physician-educator using the museum holdings as reflective triggers for medical learners. This innovation is distinct from the emerging trend of using art to build observation skills, enhance pattern recognition, and improve diagnostic acumen. Our intervention is specifically designed to promote individual reflection, foster empathy, increase appreciation for the psychosocial context of patient experience, and create a safe haven for learners to deepen their relationships with one another. Methods Individuals randomly selected a question from a set prepared by the authors to guide a reflective exploration of the galleries. Each question was different, but all invited an emotional response—a connection between a work of art and some aspect of life or medical practice, for example, “Focus on a memorable patient, and find a work of art that person would find meaningful or powerful” or “Find an image of a person with whom you have difficulty empathizing.” The exploration ended with a shared tour of evocative objects selected by the participants. The duration of the exercise was approximately 1.5 hours and required minimal faculty preparation. Results Most of the participants rated the exercise as 5 (excellent) on a 5-point Likert scale and particularly cited the effectiveness at stimulating reflection on meaningful issues and community building. Discussion The exercise is easily reproducible in any art gallery space. The same basic format and facilitation technique opens new and different conversations depending on the composition of the group and the choice of artwork. Museum-based reflection warrants further experimentation, analysis, and dissemination.
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Sun, Shihui, Jiahao Liu, Wan Zhang i Tinglong Yi. "Frictional Pressure Drop for Gas–Liquid Two-Phase Flow in Coiled Tubing". Energies 15, nr 23 (27.11.2022): 8969. http://dx.doi.org/10.3390/en15238969.
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Coiled tubing (CT) is widely used in drilling, workover, completion, fracturing and stimulation in the field of oil and gas exploration and development. During CT operation, the tubing will present a gas–liquid two-phase flow state. The prediction of frictional pressure drop for fluid in the tube is an important part of hydraulic design, and its accuracy directly affects the success of the CT technique. In this study, we analyzed the effects of the gas void fraction, curvature ratio and fluid inlet velocity on frictional pressure drop in CT, numerically. Experimental data verified simulated results. Flow friction sensitivity analysis shows the frictional pressure drop reaches its peak at a gas void fraction of 0.8. The frictional pressure gradient increases with the increase in curvature ratio. As the strength of secondary flow increases with the increase in inlet velocity, the increased trend of gas–liquid two-phase flow friction is aggravated. The correlation of friction factor for gas–liquid two-phase flow in coiled tubing is developed by regression analysis of simulation results. The research results can support high quality CT hydraulics design, through which the success of CT operations can be guaranteed.
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Dewalska-Opitek, Anna, i Maciej Mitręga. "“Appreciate me and i will be your good soldier”. The exploration of antecedents to consumer citizenship". Engineering Management in Production and Services 11, nr 3 (19.11.2019): 48–59. http://dx.doi.org/10.2478/emj-2019-0020.
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Abstract Customer citizenship behaviour (CCB) is an important consumer trend observed in the contemporary market. It may be described as an extra-role, voluntary behaviour performed in favour of other customers or companies. One of the CCB dimensions, namely, providing customer feedback to company offering, overlaps with value co-creation as a booming marketing concept. Our knowledge about factors determining this behaviour is relatively week. Trying to fill the gap, this paper discusses inclination for value co-creation among customers on the basis of literature review and explorative research. This explorative study aims to identify some company-related and customer-related antecedents to customer citizenship behaviour in the form of value co-creation in favour of companies. The theoretical deliberation is based on a critical literature review. The empirical part of the paper is based on explorative research in the form of a survey of 105 non-randomly selected customers. Aiming to identify the key drivers for customer inclination to participate in value co-creation, the exploratory factor analysis (EFA) was conducted; next, the quality of factor structure was assessed with the help of SmartPLS 3.0 using standard measures of validity; and finally, structural links between the inclination to co-create and distinct antecedents were estimated using the partial least square structural equitation modelling technique (PLS_SEM). The factor analysis suggested distinguishing two aspects of customer co-creation, i.e., either initiated by companies (Organised Co-Creation) or by customers (Spontaneous Co-creation). The estimated PLS structural model shows that only some casual paths were found statistically significant, i.e., the appreciation showed by companies towards customers engaging in the organised co-creation process (as extrinsic motivation) and customer innovativeness, as well as the fulfilment of the need for stability (as intrinsic motivation) with regards to spontaneous co-creation. The ex-post moderation analysis with the help of the PLS_MGA algorithm enabled to identify gender as the factor potentially explaining inter-group differences in the structural model.
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Wang, Yongfang, Enliang Guo, Yao Kang i Haowen Ma. "Assessment of Land Desertification and Its Drivers on the Mongolian Plateau Using Intensity Analysis and the Geographical Detector Technique". Remote Sensing 14, nr 24 (16.12.2022): 6365. http://dx.doi.org/10.3390/rs14246365.
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Desertification is one of the most harmful ecological disasters on the Mongolian Plateau, placing the grassland ecological environment under great pressure. Remote-sensing monitoring of desertification and exploration of the drivers behind it are important for effectively combating this issue. In this study, four banners/counties on the border of China and Mongolia on the Mongolian Plateau were selected as the target areas. We explored desertification dynamics and their drivers by using remote sensing imagery and a product dataset for the East Ujimqin Banner and three counties in Mongolia during the period 2000–2015. First, remote sensing information on desertification in the fourth phase of the study area was extracted using the visual interpretation method. Second, the dynamic change characteristics of desertification were analyzed using the intensity analysis method. Finally, the drivers of desertification and their explanatory powers were identified using the geographical detector method. The results show that the desertification of the East Ujimqin Banner has undergone a process of reversion, development, and mild development, with the main transition occurring between slight (SL) and non-desertified land (N), very serious desertified land (VS), and water areas. The dynamics of desertification in this region are influenced by a combination of natural and anthropogenic factors. Desertification in the three counties of Mongolia has undergone processes of development, mild development and mild development with SL and vs. as the main types. Desertification in Mongolia is mainly concentrated in Matad County, which is greatly affected by natural conditions and has little impact from anthropogenic activities. In addition, the change intensity of desertification dynamics in the study area showed a decreasing trend, and the interaction between natural and anthropogenic drivers could enhance the explanatory power of desertification dynamics. The research results provide a scientific basis for desertification control, ecological protection, and ecological restoration on the Mongolian Plateau.
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Shen, Wenjuan, Mingshi Li, Chengquan Huang, Xin Tao, Shu Li i Anshi Wei. "Mapping Annual Forest Change Due to Afforestation in Guangdong Province of China Using Active and Passive Remote Sensing Data". Remote Sensing 11, nr 5 (27.02.2019): 490. http://dx.doi.org/10.3390/rs11050490.
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Accurate acquisition of spatial distribution of afforestation in a large area is of great significance to contributing to the sustainable utilization of forest resources and the evaluation of the carbon accounting. Annual forest maps (1986–2016) of Guangdong, China were generated using time series Landsat images and PALSAR data. Initially, four PALSAR-based classifiers were used to classify land cover types. Then, the optimal mapping algorithm was determined. Next, an accurate identification of forest and non-forest was carried out by combining Landsat-based phenological variables and PALSAR-based land cover classifications. Finally, the spatio-temporal distribution of forest cover change due to afforestation was created and its forest biomass dynamics changes were detected. The results indicated that the overall accuracy of forest classification of the improved model based on the PALSAR-based stochastic gradient boosting (SGB) classification and the maximum value of normalized difference vegetation index (NDVI; SGB-NDVI) were approximately 75–85% in 2005, 2010, and 2016. Compared with the Japan Aerospace Exploration Agency (JAXA) PALSAR-forest/non-forest, the SGB-NDVI-based forest product showed great improvement, while the SGB-NDVI product was the same or slightly inferior to the Global Land Cover (GLC) and vegetation tracker change (VCT)-based land cover types, respectively. Although this combination of multiple sources contained some errors, the SGB-NDVI model effectively identified the distribution of forest cover changes by afforestation events. By integrating aboveground biomass dynamics (AGB) change with forest cover, the trend in afforestation area closely corresponded with the trend in forest AGB. This technique can provide an essential data baseline for carbon assessment in the planted forests of southern China.
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Barbazza, Erica, Damir Ivanković, Sophie Wang, Kendall Jamieson Gilmore, Mircha Poldrugovac, Claire Willmington, Nicolas Larrain i in. "Exploring Changes to the Actionability of COVID-19 Dashboards Over the Course of 2020 in the Canadian Context: Descriptive Assessment and Expert Appraisal Study". Journal of Medical Internet Research 23, nr 8 (6.08.2021): e30200. http://dx.doi.org/10.2196/30200.
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Background Public web-based COVID-19 dashboards are in use worldwide to communicate pandemic-related information. Actionability of dashboards, as a predictor of their potential use for data-driven decision-making, was assessed in a global study during the early stages of the pandemic. It revealed a widespread lack of features needed to support actionability. In view of the inherently dynamic nature of dashboards and their unprecedented speed of creation, the evolution of dashboards and changes to their actionability merit exploration. Objective We aimed to explore how COVID-19 dashboards evolved in the Canadian context during 2020 and whether the presence of actionability features changed over time. Methods We conducted a descriptive assessment of a pan-Canadian sample of COVID-19 dashboards (N=26), followed by an appraisal of changes to their actionability by a panel of expert scorers (N=8). Scorers assessed the dashboards at two points in time, July and November 2020, using an assessment tool informed by communication theory and health care performance intelligence. Applying the nominal group technique, scorers were grouped in panels of three, and evaluated the presence of the seven defined features of highly actionable dashboards at each time point. Results Improvements had been made to the dashboards over time. These predominantly involved data provision (specificity of geographic breakdowns, range of indicators reported, and explanations of data sources or calculations) and advancements enabled by the technologies employed (customization of time trends and interactive or visual chart elements). Further improvements in actionability were noted especially in features involving local-level data provision, time-trend reporting, and indicator management. No improvements were found in communicative elements (clarity of purpose and audience), while the use of storytelling techniques to narrate trends remained largely absent from the dashboards. Conclusions Improvements to COVID-19 dashboards in the Canadian context during 2020 were seen mostly in data availability and dashboard technology. Further improving the actionability of dashboards for public reporting will require attention to both technical and organizational aspects of dashboard development. Such efforts would include better skill-mixing across disciplines, continued investment in data standards, and clearer mandates for their developers to ensure accountability and the development of purpose-driven dashboards.
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Shah, Syed Muhammad Saqlain, Rehan Farooq, Abdullah Alharbi, Hashem Alyami, Islam Zada i Faiz Ali Shah. "Multiobjective Genetic Algorithm for Class Testing using OCL Class Contract Specifications: A Framework". Scientific Programming 2022 (26.04.2022): 1–11. http://dx.doi.org/10.1155/2022/3708422.
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It has been a software trend to build large-scale complex systems with high reliability. Due to the size of the software and the dynamic requirements of the stakeholders, it becomes hard to test those software systems manually. This may lead the software to fatal failures and cause irrecoverable catastrophic damage. To be safe, the software system must be investigated thoroughly before it is too late. Test sequence generation for Unified Modeling Language (UML) class models from their semiformal Object Constraint Language specifications can be helpful in identifying the defects in the early phase of the software life cycle. The existing approaches suffer from inherent problems of exhaustive exploration of finite state machines (infeasible paths, exponential number of test sequences, and uncertainty of completion of testing). Evolutionary algorithms can greatly help by optimizing the test sequences to get optimal coverage, minimal cost, and higher quality. The proposed approach helps us to improve the testing of Unified Modeling Language (UML) model-based software, by testing the conformance to semiformal class operation contract specifications (specified in the form of Object Management Group (OMG) standard and Object Constraint Language (OCL) semiformal language). The presented research achieved two main goals: (1) automation of testing process and conformance to standards of the current technique of test sequence generation, bridging the gap between the research and industry; (2) improvement in the state of the art approach through the application of multiobjective genetic algorithms (MOGAs). A case study along with the results achieved through the proposed technique is presented as well, clearly reflecting the significance of the proposed research.
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Shah, Syed Muhammad Saqlain, Rehan Farooq, Abdullah Alharbi, Hashem Alyami, Islam Zada i Faiz Ali Shah. "Multiobjective Genetic Algorithm for Class Testing using OCL Class Contract Specifications: A Framework". Scientific Programming 2022 (26.04.2022): 1–11. http://dx.doi.org/10.1155/2022/3708422.
Pełny tekst źródłaStreszczenie:
It has been a software trend to build large-scale complex systems with high reliability. Due to the size of the software and the dynamic requirements of the stakeholders, it becomes hard to test those software systems manually. This may lead the software to fatal failures and cause irrecoverable catastrophic damage. To be safe, the software system must be investigated thoroughly before it is too late. Test sequence generation for Unified Modeling Language (UML) class models from their semiformal Object Constraint Language specifications can be helpful in identifying the defects in the early phase of the software life cycle. The existing approaches suffer from inherent problems of exhaustive exploration of finite state machines (infeasible paths, exponential number of test sequences, and uncertainty of completion of testing). Evolutionary algorithms can greatly help by optimizing the test sequences to get optimal coverage, minimal cost, and higher quality. The proposed approach helps us to improve the testing of Unified Modeling Language (UML) model-based software, by testing the conformance to semiformal class operation contract specifications (specified in the form of Object Management Group (OMG) standard and Object Constraint Language (OCL) semiformal language). The presented research achieved two main goals: (1) automation of testing process and conformance to standards of the current technique of test sequence generation, bridging the gap between the research and industry; (2) improvement in the state of the art approach through the application of multiobjective genetic algorithms (MOGAs). A case study along with the results achieved through the proposed technique is presented as well, clearly reflecting the significance of the proposed research.
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Asmara, Dwita Anja. "LAMPU HIAS DENGAN DEKORASI MOTIF BATIK PARANG DAN KAWUNG INOVASI PENCIPTAAN KERAMIK". Corak 9, nr 1 (8.09.2020): 1–16. http://dx.doi.org/10.24821/corak.v9i1.3514.
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ABSTRACTProduct innovation is a strategy that must be carried out by(UMKM) in the craft business in order to always have a competitive advantage. This research is a discussion to get ceramic products that have an assessment of Indonesia so that they can compete in the global market. Parang and Kawung traditional batik motifs representing the freedom of choice of Indonesia were chosen as a form of innovation that was tried to be mixed with ceramic decorative lighting products. This batik motif is not only placed on ceramic decorative lighting products, but will be made together and become a part or character of the ceramics. This study uses a renewal method in the design of ceramic products, starting from the exploration of trends, analysis, sketching, and the last is per work design drawings or designs. Embodiment or production is done by experimentation to get the right material composition, technique, and production method or process. It will also conduct a market test by exhibiting prototype products in art-shops owned by ceramic craftsmen.The research target in the first year is the creation of techniques or production methods, and 10 ceramic designs that are in accordance with market trends and tastes. In the second year the creation of 10 prototype products and submitted to IPR, approved scientific articles, and market testing. The results of this study are expected to help craftsmen diversify their products to increase sales for the export market.ABSTRAKInovasi produk adalah strategi yang harus terus dilakukan oleh usaha mikro kecil menengah (UMKM) kerajinan agar selalu memiliki keunggulan kompetitif. Penelitian ini adalah sebuah eksplorasi penciptaan untuk mendapatkan produk keramik yang memiliki nuansa etnis Indonesia sehingga dapat berkompetisi pada pasar global. Motif batik tradisional Parang dan Kawung mewakili nuansa etnis Indonesia dipilih sebagai bentuk inovasi yang dicoba untuk di-mix-kan dengan produk lampu hias keramik. Motif batik tersebut tidak hanya sekedar ditempelkan pada produk lampu hias keramik, akan tetapi dibuat menyatu dan menjadi bagian atau karakter dari keramik tersebut. Penelitian ini menggunakan metode pendekatan estetis dalam merancang desain produk keramik, dimulai dari ekplorasi trend, analisis, pembuatan sketsa, serta yang terakhir adalah perancangan gambar kerja atau desain. Perwujudan atau produksi dilakukan dengan eksperimentasi untuk mendapatkan komposisi bahan, teknik, dan metode atau proses produksi yang tepat. Selain itu juga akan dilakukan uji pasar (market test) dengan memamerkan produk prototype di art-shop yang dimiliki oleh pengrajin keramik. Target penelitian pada tahun pertama adalah terciptanya teknik atau metode produksi, dan 10 desain keramik yang sesuai dengan trend dan selera pasar. Pada tahun ke dua terciptanya 10 produk prototype dan mendaftarkan ke HKI, penerbitan artikel ilmiah, serta uji pasar. Hasil penelitian tersebut diharapkan dapat membantu para pengrajin melakukan diversifikasi produk guna meningkatkan penjualan terutama untuk pasar ekspor.
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Juniati, Ninik. "Kajian Tentang Tenun Sesek dari Desa Pringgasela, Lombok Timur, Nusa Tenggara Barat". KELUWIH: Jurnal Sains dan Teknologi 1, nr 1 (28.02.2020): 56–62. http://dx.doi.org/10.24123/saintek.v1i1.2786.
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Abstract—Development of fashion world has been following fashion trends including textiles, colors, shapes,fabric textures, and all other details in general fashion terms. One of the exploration and development in textiles is called wastra. Wastra isn't widely known by public. Wastra technique can come in various form, for example Tenun Sesek from Pringgasela Village, East Lombok, West Nusa Tenggara, Indonesia. This research aims to understand Tenun Sesek, from the preparation before weaving process until it serve to customer. This research also consist the explanation to preserve the sustainability process build by weavers in all related matters like designing motifs, dyeing yarn, and the weaving process itself. This research use qualitative descriptive approach with interview and observation as main focused methods. This methods was chosen to explore the subject more briefly. This methods will be supported with documentation photos to capture all the details and validated the data retrieval process. Output from this research is recycling process in every aspect to maintain the product life cycle.
Keywords: Tenun Sesek, Weaving, Pringgasela Village
Abstrak—Perkembangan fashion dunia selalu berkembang mengikuti fashion trend yang berlangsung. Fashion trend ini dimulai dengan perkembangan tekstil, warna, bentuk, tekstur kain dan detail busana secara global. Ide-ide untuk eksplorasi kain juga bisa berasal dari wastra yang masih belum begitu dikenal, salah satunya adalah Tenun Sesek dari Desa Pringgasela. Berdasarkan penjelasan tersebut, penelitian ini bertujuan mengkaji tentang wastra yang berasal Desa Pringgasela, Kabupaten Lombok Timur Provinsi Nusa tenggara Barat. Hal-hal yang dikaji terkait tentang proses persiapan sebelum penenunan seperti mendesain motif, pencelupan benang, menenun benang hingga proses keberlanjutan (sustainability) yang dilakukan oleh para penenun di desa Pringgasela tersebut. Metodelogi penelitian ini menggunakan pendekatan kualitatif deskriptif. Metode pengumpulan data penelitian ini menggunakan wawancara, observasi dan dokumentasi. Teknik wawancara dan observasi ini dipilih untuk menggali informasi tentang proses pembuatan Tenun Sesek dan didukung dengan data dokumentasi berupa foto proses pembuatan Tenun Sesek dan proses pengambilan data yang dibutuhkan untuk menunjang penelitian ini. Salah satu hasil penelitian menunjukan bahwa disetiap proses pembuatan Tenun Sesek ini selalu ada proses daur ulang untuk meminimalkan limbah.
Kata kunci: Tenun Sesek, penenunan, Desa Pringgasela
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Kaittani, Despina, Olga Kouli, Vassiliki Derri i Efthymios Kioumourtzoglou. "Interdisciplinary Teaching in Physical Education". Arab Journal of Nutrition and Exercise (AJNE) 2, nr 2 (16.11.2017): 91. http://dx.doi.org/10.18502/ajne.v2i2.1248.
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The interdisciplinary approach has risen in the modern curricula as it is considered an important and challenging technique. Physical education is a prime content area for interdisciplinary learning. In order to integrate different subject areas into Physical Education lessons, the specialist needs to learn more about the academic curriculum. Integrating core subjects with physical activity can easily be done and can be very beneficial to student learners in all levels of Education. A great effort is done in addition to be integrated with other subjects. Over the last twenty years there have been frequent internal changes at international level, which also affect pre-school curricula. This trend has been intensified in recent years, with unprecedented mobility being observed, to the point of demanding a fundamental reform of the educational mission of the kindergarten. An interdisciplinary approach has been at the core of attention in primary and secondary school education recently.In this approach, teachers collaborate to invent and apply more effective means of teaching by associating the subjects and activities of a school subject in the curriculum with other subjects. The basic aim and purpose is to cultivate skills and values such as cooperatives, flexibility, adaptability, solidarity, but above all to provide basic knowledge, exploration, classification, selection, evaluation, resolution, and observation.
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Bello, Opeyemi, Javier Holzmann, Tanveer Yaqoob i Catalin Teodoriu. "Application Of Artificial Intelligence Methods In Drilling System Design And Operations: A Review Of The State Of The Art". Journal of Artificial Intelligence and Soft Computing Research 5, nr 2 (1.04.2015): 121–39. http://dx.doi.org/10.1515/jaiscr-2015-0024.
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AbstractArtificial Intelligence (AI) can be defined as the application of science and engineering with the intent of intelligent machine composition. It involves using tool based on intelligent behavior of humans in solving complex issues, designed in a way to make computers execute tasks that were earlier thought of human intelligence involvement. In comparison to other computational automations, AI facilitates and enables time reduction based on personnel needs and most importantly, the operational expenses.Artificial Intelligence (AI) is an area of great interest and significance in petroleum exploration and production. Over the years, it has made an impact in the industry, and the application has continued to grow within the oil and gas industry. The application in E & P industry has more than 16 years of history with first application dated 1989, for well log interpretation; drill bit diagnosis using neural networks and intelligent reservoir simulator interface. It has been propounded in solving many problems in the oil and gas industry which includes, seismic pattern recognition, reservoir characterisation, permeability and porosity prediction, prediction of PVT properties, drill bits diagnosis, estimating pressure drop in pipes and wells, optimization of well production, well performance, portfolio management and general decision making operations and many more.This paper reviews and analyzes the successful application of artificial intelligence techniques as related to one of the major aspects of the oil and gas industry, drilling capturing the level of application and trend in the industry. A summary of various papers and reports associated with artificial intelligence applications and it limitations will be highlighted. This analysis is expected to contribute to further development of this technique and also determine the neglected areas in the field.
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Luth, Stefan, Fredrik Sahlström, Mikael Bergqvist, Alexander Hansson, Edward P. Lynch, Stefan Sädbom, Erik Jonsson, Stefan S. Andersson i Nikolaos Arvanitidis. "Combined X-Ray Computed Tomography and X-Ray Fluorescence Drill Core Scanning for 3-D Rock and Ore Characterization: Implications for the Lovisa Stratiform Zn-Pb Deposit and Its Structural Setting, Bergslagen, Sweden". Economic Geology 117, nr 6 (1.09.2022): 1255–73. http://dx.doi.org/10.5382/econgeo.4929.
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Abstract We present the results of a pilot study that integrates automated drill core scanning technology based on simultaneous X-ray computed tomography (XCT) and X-ray fluorescence (XRF) analyses to provide high-spatial-resolution (<0.2 mm) information on 3-D rock textures and structures, chemical composition, and density. Testing of its applicability for mineral exploration and research was performed by scanning and analyzing 1,500 m of drill core from the Paleoproterozoic Lovisa stratiform Zn-Pb sulfide deposit, which is part of a larger mineral system also including Cu-Co and Fe-(rare earth element) mineralization, hosted by the highly strained West Bergslagen boundary zone in south-central Sweden. The obtained scanning data complements data derived from structural field mapping, drill core logs, and chemical analysis as well as from multiscale 3-D geologic modeling at Lovisa. Data integration reveals macro- and mesoscopic folding of S0/S1 by asymmetric steeply SE-plunging F2 folds and N-striking vertical F3 folds. Stretching lineations, measured directly from the scanning imagery, trend parallel to F2 fold hinges and modeled ore shoots at the nearby Håkansboda Cu-Co and Stråssa and Blanka Fe deposits. The textural character of the Lovisa ore zones is revealed in 3-D by XCT-XRF scanning and highlight remobilization of Zn and Pb from primary layering into ductile and brittle structures. The downhole bulk geochemical trends seen in scanning and traditional assay data are generally comparable but with systematic variations for some elements due to currently unresolved XRF spectral overlaps (e.g., Co and Fe). The 3-D deformation pattern at Lovisa is explained by D2 sinistral transpression along the West Bergslagen boundary zone in response to regional north-south crustal shortening at ca. 1.84–1.81 Ga. Local refolding was caused by D3 regional east-west crustal shortening resulting in dextral transpression along the West Bergslagen boundary zone, presumably at ca. 1.80–1.76 Ga. Based on polyphase ore textures and modeled ore shoots aligned to F2 fold hinges, we postulate that D2 and D3 transpressive deformation exerted both a strong control on ore remobilization and the resulting orebody geometries at Lovisa and neighboring deposits within the West Bergslagen boundary zone. We conclude that the combined XCT-XRF drill core scanning technique provides a valuable tool for 3-D ore and rock characterization, generating continuous downhole data sets, with the potential for increasing precision and efficiency in mineral exploration and mining.
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Olatubosun, Esho Oluwaseyi, Osisanya Olajuwon Wasiu, Ibitoye Taiwo Abel, Ajibade Femi Zephaniah i Tokunbo Sanmi Fagbemigun. "Aeromagnetic Interpretation of Basement Structures and Geometry in Parts of the Middle Benue Trough, North Central, Nigeria". Advances in Geological and Geotechnical Engineering Research 4, nr 4 (30.11.2022): 22. http://dx.doi.org/10.30564/agger.v4i4.5128.
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The research of an analysis of aeromagnetic data collected in the middle Benue Trough in north-central Nigeria is presented. A detailed analysis of basement structures is conducted in order to identify regions with high hydrocarbon potential that is different from those discovered by earlier researchers. Aeromagnetic data were filtered by using the Butterworth and Gaussian filters, transformed by engaging the reduction to the equator technique, and subsequently enhanced. To estimate magnetic basement depths at various places throughout the basin, the Euler deconvolution depth weighting approach was used. Eleven (11) sub-basins with depths ranging from –2000 m to –8000 m were also identified by Euler’s findings. The sub-basins trend in the NE-SW direction while the average sediment thickness is found to be more than 3 km. The extracted structural features indicate areas like Kadi Blam and Kado areas in the southeastern part and Ogoja and Obudu in the southern part of the study area as regions with high structural densities. These areas coincide with the areas delineated as the sub-basins. The cross-sections generated reveal depressions caused by the action of some tectonic activities in the area. This study identified undulating basement topography believed to be due to tectonic activities as well as five areas that are possible targets for hydrocarbon exploration.
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Arjanto, Paul, Ibrahim Bafadal, Adi Atmoko i Asep Sunandar. "Bibliometric analysis of school improvement research: A century of scholarly contributions". Jurnal Akuntabilitas Manajemen Pendidikan 11, nr 1 (15.05.2023): 34–48. http://dx.doi.org/10.21831/jamp.v11i1.59380.
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This study aims to comprehensively review the historical development and current status of research in the field of school improvement using a bibliometric analysis approach. Recognizing the vital role of schools in society and the necessity for their constant evolution, it is essential to understand the breadth and depth of scholarly efforts in school improvement. Using the Scopus index, 596 English language journal articles on school improvement published between 1916 and 2023 were identified and analyzed. Utilizing the VOSviewer software, the bibliometric analysis was conducted in two stages: descriptive statistics to understand the trend of document volumes and co-authorship countries, and a multidimensional scaling technique to visualize co-authorship, co-occurrence, and citation networks. The data revealed a consistent rise in publication volume over the years, with a peak in 2020. Despite contributions from 45 countries, the United States and the United Kingdom were the most prolific. However, author collaboration was found to be minimal, suggesting potential for broader partnerships. The study also identified key research themes such as leadership, distributed leadership, and accountability through keyword co-occurrence analysis. The most frequently cited literature emphasized the role of collaboration, instructional program coherence, and school culture in school improvement. The findings underscore the necessity for increased global collaboration, exploration of emerging themes, and enhanced geographical representation in future research to further enrich the knowledge base in this vital educational field.
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Arora, Bhavinder K., Rachit Arora i Akshit Arora. "Pedicled omentum hepatorrhaphy in blunt hepatic trauma". International Surgery Journal 4, nr 9 (24.08.2017): 3038. http://dx.doi.org/10.18203/2349-2902.isj20173883.
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Background: The liver is the most common solid viscera injured in motor vehicle accidents. Advances in radiological diagnostic techniques and critical care have increasing trend towards the nonoperative management. Still operative management is needed if there is continuous bleed or haemodynamic instability. The omentum commonly known as policeman of abdomen as it reaches intra-abdominal injury site. It is known to adhere to the site of injury and seals it. It increases the vascularity and starts neoangiogenesis. This produces haemostasis and promotes wound healing.Methods: In this study 24 patients were managed by this technique of pedicled omentoplasty. These patients were in the age group of 22 to 42 years. There was male dominance, 22 patients were males (91.7%) while only 2 patients were females (8.3%). The use of omentum in packing is described here. The omentum is converted to a pedicled flap based on right omental artery by tailoring it. The active bleeding vessels can be ligated. The whole length of pedicled omentum is packed in liver cavity. Using liver sutures two or more sutures are applied for stabilization.Results: On exploration, the hepatic injury was assigned grade as per AAST liver injury scale. Out of 24 patients included in this study; two (8.33%) were grade I patients, three (12.5%) were grade II patients, nine (37.5%) were grade III patients and ten (41.67%) were grade IV patients. Patients with grade V and grade VI were dealt by perihepatic packing as damage control surgery were excluded from this study.Conclusions: Pedicled omentoplasty in blunt hepatic trauma can be used irrespective of the grade of liver injury. It should be used in combination with other procedures like debridement, segmental or unsegmental resection, control of active bleeding vessels, use of Pringles manoeuvre, selective hepatic artery ligation and even with deep mattress suturing. This helps in haemostasis, early healing and rapid recovery with minimum complications.
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Abu Seman, A., N. H. Berahim i M. G.M. Noh. "Mitigating CO2 Emission Via Catalytic Conversion to Methane : a Feasibility Study of Metal Oxide Supported Nickel Based Catalysts". International Journal of Engineering & Technology 7, nr 4.14 (24.12.2019): 137. http://dx.doi.org/10.14419/ijet.v7i4.14.27514.
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Exploration and production of sour gas field raise the need for CO2 management to minimize the adverse effect of green house gas venting to the environment. It is a fine balance between the sunken value of CO2 reinjection and value creation in CO2 conversion to value product, essential in ensuring project’s economic viability. Conversion to methane is selected due to the ease of integration with current process facility. Catalytic conversion of CO2 to methane are reported here over metal oxides (Al2O3, ZrO2 and La2O3) supported Nickel base catalysts over a range of temperature and GHSV with fixed H2/CO2 molar ratio. The catalysts were prepared by wet impregnation technique at room temperature. It was then characterized with X-Ray Diffraction (XRD), Brunauer–Emmett–Teller (BET), Temperature Programmed Reduction (TPR) and Temperature Programmed Desorption (TPD). All catalyst systems showed trend of decreasing CO2 conversion when the GHSV is increased from 10000 to 15000 h-1, which is in line with short reactant contact time. The impact is more pronounced at low temperature of 300 °C, but at high temperature of 400 °C, the conversion is almost comparable irrespective of GHSV. Experimental results indicate that Ni/Al2O3 gives the highest CO2 conversion of 74% while 7% and 67% for Ni/ZrO2 and Ni/La2O3 respectively. There is a prospect for further scaling up to complement the current commercial catalyst proven for handling low concentration of CO2.
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Mahwa, Joshua, Da-jiang Li, Jian-hua Ping, Wei Leng, Jia-bo Tang i Dong-yun Shao. "Mapping the spatial distribution of fossil geothermal manifestations and assessment of geothermal potential of the Tangyin rift, Southeast of Taihang Mountain in China". Journal of Mountain Science 19, nr 8 (sierpień 2022): 2241–59. http://dx.doi.org/10.1007/s11629-022-7329-2.
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AbstractThe spatial prediction of geothermal sites along the southeast side of Taihang Mountain in the Tangyin rift is a critical goal in the development of renewable energy resources in cities such as Hebi in Henan province, which has significant potential for geothermal energy production due to the existence of deep faults and Cenozoic volcano. The study aimed to delineate areas with high geothermal manifestations for detailed geothermal exploration and well-test drilling. To define favorable zones for geothermal potentiality, multi-source datasets were chosen to generate evidence thematic layers that demonstrate the distribution of geothermal anomalies such as geologic maps, structural maps, Land Surface Temperature maps (LST), and hydrothermal mineral alterations maps. The remote sensing and Geographical Information System (GIS) approaches were integrated to map fossil geothermal manifestations and appraise the promising geothermal zones from Landsat 8 OLI/TIRS and Advanced Spaceborne Thermal Emission and Reflection Radiometer-Digital Elevation Model (ASTER-DEM) dataset using the Analytic Hierarchy Process (AHP), which is one of the Mult-criteria Decision Making methods. Results show LST values ranging from 22.6°C to 45.4°C, with the highest values found along the faults and volcanic areas. The hydrothermal alteration minerals discriminated from band ratios of 4/2, 6/5, and 6/7 for iron oxide, ferrous minerals, and clays reveal the presence of high amount of montmorillonite and illite minerals along the faults and volcanoes which are related to hot fluid circulation from subsurface. Structural analysis shows that the major structural trend follows the NNE Tangdong and Tangxi faults, with high density on the west side of the Tangxi fault where there is good exposure of outcrop but less fault density on the east side due to sedimentation in a low land which may conceal geological structures. Lastly, all the thematic layers of geothermal factors were reclassified, ranked, and integrated by the weight overlay logic model based on the influence of geothermal suitability to map potential areas for geothermal resources whereby 5 zones were obtained ranging from very poor to very good. The promising potential sites are mostly found along the highly deep structures of the major Tangxi fault crosscutting the permeable lithology of carbonate rocks and around the Hebi volcanoes. The distribution of hot springs and geothermal wells of the Hebi field were correlated and verified against the potential geothermal anomalies map. The overall integrated method proposes an advanced technique for designing the Tangyin rift’s exploration plan and development actions for geothermal resources utilization, which can be used for exploration of any unveiling geothermal potential sites.
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Djannah, Sitti, Fatwa Tentama, Rendi Sinanto, Sulistyawati Sulistyawati, Surahma Asti Mulasari, Tri Wahyuni Sukesi, Rokhmayanti Rokhmayanti, Siti Kurnia Widi Hastuti, Muhammad Syamsu Hidayat i Ulinnuha Yudiansa Putra. "Exploration of the Profile and Intention in Restricting Online Game in Teenagers with Gaming Disorder: A Qualitative Study". Open Access Macedonian Journal of Medical Sciences 9, E (19.10.2021): 1140–46. http://dx.doi.org/10.3889/oamjms.2021.7209.
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Background
Gaming disorder is one of the mental disorders when someone does his spare time activity by playing the game and is addicted to playing online games. This condition is more common in adolescents and eventually could harm their health. Hence, the researchers interested to study the teenagers' profiles and intentions to identify their efforts and obstacles in restricting online games.
Objective
This study aimed to explore the profile and addiction scales of teenagers with online gaming disorder and to identify their intentions, plans, and obstacles in reducing their addictions.
Method
The study employed qualitative research with a phenomenology approach. The research included six online gamer participants. The researcher selected the participants by using a purposive sampling technique. They were game-addicted teenagers according to the scale of gaming addiction. The researchers collected the data with a guided interview and an observation list. They analyzed the data using phenomenology analysis.
Results
The scale of addiction data showed that all informants were in a high category of addiction. This scale of addiction was in line with their profiles of playing games at least five hours a day because they perceived playing games as an urgent activity to relieve stress or as entertainment. When they played online games, they held back hunger and skipped their meals, even though they were hungry and often held back urinating. Besides, being actively playing at night made them sleep in the daytime. In addition, the data showed that four of the informants stated that they had some intentions and plans to reduce or quit playing, but they did not have specific plans. They had not followed up on their readiness and had not known when to reduce or stop playing online games. Some obstacles cause them to have no intentions.
Conclusion
The profiles of the teenagers with gaming disorders showed a high category of addiction scale. They played online games as stress-relieving entertainment. When playing, they often held hunger, thirsty, urinating, and did not sleep at night. There were some teenagers with gaming disorders who had no intention of reducing or stopping the games. Meanwhile, some others were willing to reduce and quit the game, but they did not have any alternative activities and did not know when they will stop playing online games. Friends' invitation, the fun of playing games, problems of self-control/habits, the temptation of watching other gamers playing, boredom, and the new trend of the electronic game sport were the obstacles for the addictive teenagers to control their online gaming.
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Alagarsamy, Subburaj, i Margret Vijay. "Construction and Validation of the Learning Management System Success Scale in the Higher Education Setting". GATR Global Journal of Business Social Sciences Review 7, nr 2 (24.06.2019): 139–50. http://dx.doi.org/10.35609/gjbssr.2019.7.2(5).
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Objective - The concept of education is entirely outdated. Currently, many higher education institutions are adopting blended learning pedagogy to nurture 21st-century skills. The integration of ICT has become a recent global trend in education with universities and colleges using Learning Management Systems (LMS) as their primary method of disseminating and administrating teaching and learning processes. The exploration of the factors crucial for successful implementation of LMS is therefore essential. However, most literature on this topic focuses on the technical quality of LMS’s, and few address the educational quality and efficiency of LMS. Previous research also fails to discuss the conceptualization and measurement of LMS success. This study aims to construct and validate an instrument to measure LMS success in higher education institutions. Methodology/Technique – Various IS success frameworks were used to design the constructs in this study. A quantitative methodology was adopted with the sample of 379 randomly selected responses from university/college students, academics, and course administrators from India (n=297) and the Maldives (n=82). IBM SPSS AMOS 25 was used to check the validity and reliability of the instrument and to identify the measurement invariance. Findings & Novelty - This study concludes that information quality, educational quality, system quality, service quality, intention to use, user satisfaction, and net benefits are the critical constructs for measuring LMS success. The findings of this study can be used to support scholars in developing and examining other information system-related theories, as well as to higher education institutions while implementing different LMS’s. Type of Paper: Empirical.
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Chen, Deliang, Yanyan Lu i Dongzhen Jia. "Land deformation associated with exploitation of groundwater in Changzhou City measured by COSMO-SkyMed and Sentinel-1A SAR data". Open Geosciences 10, nr 1 (26.11.2018): 678–87. http://dx.doi.org/10.1515/geo-2018-0054.
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Abstract The Urban Agglomeration in Yangtze River Delta is one of the most important economic and industrial regions in China. The City of Changzhou is one of the most important industrial citys in Yangtze River Delta Urban Agglomeration. Activities here include groundwater exploration. Groundwater overexploitation has contributed to the major land deformation in this city. The severity and magnitude of land deformation over time were investigated in Changzhou City. A Small Baseline Subset Interferometric Synthetic Aperture Radar (SBAS-InSAR) technology, provides a useful tool in measuring urban land deformation. In this study, a time series of COSMO-SkyMed and Sentinel-1A SAR images covering Changzhou City were acquired. SBAS-InSAR imaging technique was used to survey the extent and severity of land deformation associated with the exploitation of groundwater in Changzhou City. Leveling data was used to validate the SBAR-InSAR productions, the error of SBAR-InSAR annual subsidence results was within 2 mm. The results showed that three main land subsidence zones were detected at Xinbei, Tianning and Wujin District. Four subsidence points were selected to analyze the temporal and spatial evolution characteristics of land subsidence. The subsidence rate of P1 to P4 was −2.48 mm/year, −12.78 mm/year, −18.09 mm/year, and −12.69 mm/year respectively. Land subsidence over Changzhou showed a trend of slowing down from 2011 to 2017, especially in Wujin District. SBAR-InSAR derived land deformation that correlates with the water level change in six groundwater stations. Indicated that with groundwater rebound, the land rebound obviously, and the maximum rebound vale reached 9.13 mm.
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Li, Pei Zhu, i Xiao Guang Zhao. "Summary and Overview of Development Technologies of Unconventional Oil and Gas Reservoir". Advanced Materials Research 734-737 (sierpień 2013): 1280–85. http://dx.doi.org/10.4028/www.scientific.net/amr.734-737.1280.
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Conventional reservoirs and unconventional reservoirs differ a lot in terms of accumulation mechanism, distribution, exploration evaluation method and technique. Therefore the accumulation study and exploration evaluation for unconventional reservoir are different from that of traditional reservoir. This paper presents five development techniques of unconventional oil and gas resources, their features, advantages and disadvantages and summarizes the current advanced technologies and their development trends.
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Chamarczuk, Michal, Michal Malinowski, Deyan Draganov, Emilia Koivisto, Suvi Heinonen i Sanna Rötsä. "Reflection imaging of complex geology in a crystalline environment using virtual-source seismology: case study from the Kylylahti polymetallic mine, Finland". Solid Earth 13, nr 3 (22.03.2022): 705–23. http://dx.doi.org/10.5194/se-13-705-2022.
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Abstract. For the first time, we apply a full-scale 3D seismic virtual-source survey (VSS) for the purpose of near-mine mineral exploration. The data were acquired directly above the Kylylahti underground mine in Finland. Recorded ambient noise (AN) data are characterized using power spectral density (PSD) and beamforming. Data have the most energy at frequencies 25–90 Hz, and arrivals with velocities higher than 4 km s−1 have a wide range of azimuths. Based on the PSD and beamforming results, we created 10 d subset of AN recordings that were dominated by multi-azimuth high-velocity arrivals. We use an illumination diagnosis technique and location procedure to show that the AN recordings associated with high apparent velocities are related to body-wave events. Next, we produce 994 virtual-source gathers by applying seismic interferometry processing by cross-correlating AN at all receivers, resulting in full 3D VSS. We apply standard 3D time-domain reflection seismic data processing and imaging using both a selectively stacked subset and full passive data, and we validate the results against a pre-existing detailed geological information and 3D active-source survey data processed in the same way as the passive data. The resulting post-stack migrated sections show agreement of reflections between the passive and active data and indicate that VSS provides images where the active-source data are not available due to terrain restrictions. We conclude that while the all-noise approach provides some higher-quality reflections related to the inner geological contacts within the target formation and the general dipping trend of the formation, the selected subset is most efficient in resolving the base of formation.
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Muntazir, R. M. Akram, M. Mushtaq i K. Jabeen. "A Numerical Study of MHD Carreau Nanofluid Flow with Gyrotactic Microorganisms over a Plate, Wedge, and Stagnation Point". Mathematical Problems in Engineering 2021 (12.04.2021): 1–22. http://dx.doi.org/10.1155/2021/5520780.
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This article addresses the numerical exploration of steady and 2D flow of MHD Carreau nanofluid filled with motile microorganisms over three different geometries, i.e., plate, wedge, and stagnation point of a flat plate. The influence of magnetic field, viscous dissipation, thermophoresis, and Brownian motion is considered for both cases, i.e., shear thinning and shear thickening. A set of relevant similarity transformations are utilized to obtain dimensionless form of governing coupled nonlinear partial differential equations (PDEs). The transformed system of ordinary differential equations (ODEs) is then numerically solved by bvp4c via MATLAB based on shooting technique and Runge–Kutta–Fehlberg (RKF) scheme via MAPLE. Also, a numerical analysis has been made for skin friction factor, heat, and mass transfer rates. Results elucidate that all the profiles except velocity show decreasing behavior for higher values of magnetic field parameter. Among all three flow geometries for both shear thinning and shear thickening cases, the flow over a plate has lesser skin friction factor. The nanoparticle concentration and density of motile microorganism decrease in both the shear thinning and shear thickening cases, for increasing values of Brownian motion (Nb), but reverse trend is observed for rising values of thermophoresis parameter (Nt). Furthermore, it is observed that, as we increase the values of suction/injection parameter (S), the velocity of fluid increases but decreases the fluid temperature, concentration of mass and density of motile organisms over a plate, wedge, and stagnation point of a flat plate. Also, we observed that shear thinning nanofluid has higher rate of heat, mass, and motile microorganisms mass transfers than shear thickening fluid. Both shear thinning and thickening nanofluid have a low rate of heat/mass and gyrotactic microorganisms mass transfer over plate among wedge and stagnation point flow.
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Ismail, Che Ain Munirah, Zakuan Zainy Deris, Ruzilawati Abu Bakar i Nabilah Ismail. "In Vitro Anti-Leptospiral Activity of Phyllanthus amarus Extracts and Their Combinations with Antibiotics". International Journal of Environmental Research and Public Health 18, nr 6 (10.03.2021): 2834. http://dx.doi.org/10.3390/ijerph18062834.
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Despite modern medicine, there is an increasing trend for cases of the bacterial infection leptospirosis, and this has led to the exploration of alternative medicines from various sources including plants. The aim of this study was to investigate the in vitro anti-leptospiral activity of Phyllanthus amarus extracts alone and combined with penicillin G, ceftriaxone, and doxycycline. Antimicrobial susceptibility testing was performed using the microdilution broth technique upon methanol extract (ME), aqueous extract (AE), and antibiotics against the Leptospira interrogans serovars Australis, Bataviae, Canicola, and Javanica, to determine minimum inhibitory concentrations (MICs) and minimum bactericidal concentrations (MBCs). The results were analyzed using an ELISA microplate reader combined with microscopic analysis. Synergy testing using a checkerboard assay was performed to determine the fractional inhibitory concentration index values of extracts combined with antibiotics against leptospires. Scanning electron microscopy (SEM) was used to investigate morphological changes of leptospires caused by potential anti-leptospiral agents alone and combined with antibiotics. The MICs and MBCs for P. amarus extracts ranged from 100 to 400 µg/mL for AEs and from 400 to 800 µg/mL for MEs. Penicillin G was the most effective anti-leptospiral drug, with MICs and MBCs ranging from <0.01 to 0.78 and <0.01 to 3.13 µg/mL, respectively, followed by ceftriaxone, with both MICs and MBCs ranging from 0.05 to 0.78 µg/mL, and doxycycline, with MICs and MBCs ranging from 0.39 to 3.13 µg/mL and 12.5 to 25 µg/mL, respectively. Combinations of P. amarus extracts and antibiotics did not show synergistic effects on all tested Leptospira serovars, with some combinations demonstrating antagonistic effects. SEM analysis, however, showed distorted Leptospira surfaces. P. amarus AE performed better anti-leptospiral activity than P. amarus ME. The morphological effects of P. amarus extract alone and its combination with antibiotic on Leptospira cells revealed promising anti-leptospiral properties.
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Peñarroya, P., i R. Paoli. "Orbit propagation around small bodies using spherical harmonic coefficients obtained from polyhedron shape models". Proceedings of the International Astronomical Union 15, S364 (październik 2021): 203–10. http://dx.doi.org/10.1017/s1743921321001496.
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AbstractMissions to asteroids have been the trend in space exploration for the last years. They provide information about the formation and evolution of the Solar System, contribute to direct planetary defense tasks, and could be potentially exploited for resource mining. Be their purpose as it may, the factor that all these mission types have in common is the challenging dynamical environment they have to deal with. The gravitational environment of a certain asteroid is most of the times not accurately known until very late mission phases when the spacecraft has already orbited the body for some time.Shape models help to estimate the gravitational potential with a density distribution assumption (usually constant value) and some optical measurements of the body. These measurements, unlike the ones needed for harmonic coefficient estimation, can be taken from well before arriving at the asteroid’s sphere of influence, which allows to obtain a better approximation of the gravitational dynamics much sooner. The disadvantage they pose is that obtaining acceleration values from these models implies a heavy computational burden on the on-board processing unit, which is very often too time-consuming for the mission profile.In this paper, the technique developed on [1] is used to create a validated Python-based tool that obtains spherical harmonic coefficients from the shape model of an asteroid or comet, given a certain density for the body. This validated software suite, called AstroHarm, is used to analyse the accuracy of the models obtained and the improvements in computational efficiency in a simulated spacecraft orbiting a small body.The results obtained are shown offering a qualitative comparison between different order spherical harmonic models and the original shape model. Finally, the creation of a catalogue for harmonics is proposed together with some thoughts on complex modelling using this tool.
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Sharma, Manjula, Akshita Gupta, Sachin Kumar Gupta, Saeed Hamood Alsamhi i Alexey V. Shvetsov. "Survey on Unmanned Aerial Vehicle for Mars Exploration: Deployment Use Case". Drones 6, nr 1 (22.12.2021): 4. http://dx.doi.org/10.3390/drones6010004.
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In recent years, the area of Unmanned Aerial Vehicles (UAVs) has seen rapid growth. There has been a trend to build and produce UAVs that can carry out planetary exploration throughout the past decade. The technology of UAVs has tremendous potential to support various successful space mission solutions. In general, different techniques for observing space objects are available, such as telescopes, probes, and flying spacecraft, orbiters, landers, and rovers. However, a detailed analysis has been carried out due to the benefits of UAVs relative to other planetary exploration techniques. The deployment of UAVs to other solar bodies has been considered by numerous space agencies worldwide, including NASA. This article contributes to investigating the types of UAVs that have been considered for various planetary explorations. This study further investigates the behaviour of UAV prototypes on Mars’ surface in particular. It has been discovered that a prototype UAV flight on Mars has a higher chance of success. In this research, a prototype UAV has been successfully simulated to fly on Mars’ surface. This article discusses the opportunities, challenges, and future scope of deploying UAVs on Mars.
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Nachammai, K. T., Srinithi Ramachandran, Chitra Nagarajan, Langeswaran Kulanthaivel, Gowtham Kumar Subbaraj, Kirubhanand Chandrasekaran, Vijayalakshmi Paramasivan i Senthilkumar Subramanian. "Exploration of Bioinformatics on Microbial Fuel Cell Technology: Trends, Challenges, and Future Prospects". Journal of Chemistry 2023 (27.01.2023): 1–8. http://dx.doi.org/10.1155/2023/6902054.
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Microbial fuel cells (MFCs) are a cost-effective and environmentally friendly alternative energy method. MFC technology has gained much interest in recent decades owing to its effectiveness in remediating wastewater and generating bioelectricity. The microbial fuel cell generates energy mainlybecause of oxidation-reduction reactions. In this reaction, electrons were transferred between two reactants. Bioinformatics is expanding across a wide range of microbial fuel cell technology. Electroactive species in the microbial community were evaluated using bioinformatics methodologies in whole genome sequencing, RNA sequencing, transcriptomics, metagenomics, and phylogenetics. Technology advancements in microbial fuel cells primarily produce power from organic and inorganic waste from various sources. Reduced chemical oxygen demand and waste degradation are two added advantages for microbial fuel cells. From plants, bacteria, and algae, microbial fuel cells were developed. Due to the rapid advancement of sequencing techniques, bioinformatics approaches are currently widely used in the technology of microbial fuel cells. In addition, they play an important role in determining the composition of electroactive species in microorganisms. The metabolic pathway is also possible to determine with bioinformatics resources. A computational technique that reveals the nature of the mediators and the substrate was also used to predict the electrochemical properties. Computational strategies were used to tackle significant challenges in experimental procedures, such as optimization and understanding microbiological systems. The main focus of this review is on utilizing bioinformatics techniques to improve microbial fuel cell technology.
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ALZATE MONTOYA, PAOLA MARCELA, BRIGITH DANIELA HURTADO NIETO i MARIANA GÓMEZ JIMENEZ. "GESTIÓN DE LA PRODUCCIÓN: EVOLUCIÓN Y TENDENCIAS DE INVESTIGACIÓN". Revista Ingeniería, Matemáticas y Ciencias de la Información 9, nr 18 (31.07.2022): 29–46. http://dx.doi.org/10.21017/rimci.2022.v9.n18.a118.
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Production management is a progressively relevant issue for the industrial sector, constituted as a business advantage by integrating fundamental decentralized activities for the processes. Organizations manage to optimize their productive resources and be potentially sustainable in a world where competition is increasingly stronger and globalized by incorporating productive management mechanisms. The present study presents a systematic review of the literature on production management, using bibliometric instruments and methods. The Scopus database was implemented for the bibliographic exploration published between 2000 and 2021. The results obtained were processed using the Bibliometric, Software R and Gephi tools. The documents were classified by applying the tree metaphor, which orders them by means of three categories, classical, structural and recent, the latter allow identifying research perspectives, which address issues such as energy efficiency methods applied to processes of production, techniques for distribution systems in production and diffusion techniques. Finally, an agenda for future research is presented.
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Liang, Zhaoyi. "The Trend and Development of Geological Prospecting and Exploration Technology for Gold Deposits". Academic Journal of Science and Technology 3, nr 2 (28.10.2022): 59–61. http://dx.doi.org/10.54097/ajst.v3i2.2092.
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With the rapid development of China's social economy, the demand for gold ore consumption is increasing day by day. Under this condition, it is necessary to study the key techniques of gold ore prospecting and geological exploration and carry out geological exploration smoothly. This is to further improve the efficiency of gold ore exploration in China. In practice, Chinese government workers should carefully observe the scientific and technological development of gold prospecting because of the social reality, and scientifically and reasonably choose the prospecting and technical means according to the actual requirements of social geology. It is to discover more gold resources and provide a guarantee for social and economic development.