Science and technology development journal

The noncondensable gases in most geothermal resources include CO2 and smaller amounts of other gases. Currently, the worldwide geothermal power is a small sector within the energy industry, and CO2 emissions related to the utilisation of geothermal resources are consequently small. In some countries, however, such as Turkey and Iceland, geothermal energy production contributes significantly to their energy budget, and their CO2 emissions are relatively significant.

15p tanmocphong 29-01-2022 12 1   Download

Vận hành kinh tế của hệ thống máy phát điện là một trong những vấn đề phổ biến trong hệ thống năng lượng. Trong bài báo này, một thuật toán mới được đề xuất đó là thuật toán tìm kiếm nhóm (Search group algorithm - SGA) để giải quyết các bài toán phân bố công suất tối ưu (Optimal power flow - OPF).

8p larachdumlanat127 02-01-2021 55 6   Download

Bài báo trình bày kết quả của 100 thí nghiệm 3 trục CIU trên 20 mẫu đất thuộc 2 nhóm mẫu đất bùn sét Tp.HCM (lấy ở quận Bình Thạnh và huyện Nhà Bè) ứng với 5 giá trị OCR khác nhau: 1, 1,5, 2, 4, 6). Từ kết quả thí nghiệm, mô hình SHANSEP đã được xác định với hệ số xác định R2 rất cao (gần bằng 1).

7p larachdumlanat127 02-01-2021 37 3   Download

Nnghiên cứu đi vào đánh giá tính khả thi của việc sử dụng nguồn khí ethane cho sản xuất hóa dầu trên cơ sở các khía cạnh về mặt thị trường, kỹ thuật và kinh tế. Kết quả cho thấy phương án sản xuất nhựa HDPE từ ethane được xếp hạng cao nhất do hiệu quả kinh tế tương đối tốt, công nghệ đã thương mại hóa và thị trường tiêu thụ trong nước còn thiếu hụt và đa số đáp ứng bằng nhập khẩu.

6p larachdumlanat127 02-01-2021 16 3   Download

: In recent decades, the antimicrobial surfaces/coating properties towards a longlasting microbicidal effect have drawn enormous attention by researchers, they have been developed and used in a wide variety of high-touch hospital devices as a potential approach.

9p larachdumlanat127 02-01-2021 11 3   Download

In this paper, the technique is applied to analyze transient heat transfer problems. In order increase time efficiency, a modelreduction technique, namely the proper orthogonal decomposition (POD), is employed. The idea is that a given large-size problem is projected into a small-size one which can be solved faster but still maintain the required accuracy.

10p larachdumlanat127 02-01-2021 10 2   Download

Trong bài báo này, các tác giả đề xuất một hướng ứng dụng cơ sở tri thức để giải quyết đồng tham chiếu đối tượng (thực thể) với khía cạnh có cảm xúc. Đồng thời, chúng tôi cũng xây dựng một mô hình cho bài toán phân giải đồng tham chiếu dựa trên Ontology trong phân tích cảm xúc của văn bản tiếng Anh. Cuối cùng bài báo đưa ra phương pháp đánh giá cho mô hình.

8p larachdumlanat127 02-01-2021 16 2   Download

In this study, salmon by-products were utilised to produce high ash content (AC) salmon bone powder (SBP) using hydrolytic enzyme and apply in the production of Tra catfish cake. The byproducts included 61.9 of moisture, 43.1 of protein, 45.4 of lipid, 10.2% of ash, 3.7 of calcium and 2.3% of phosphorus (on dry weight basis).

7p larachdumlanat127 02-01-2021 15 2   Download

Constructed wetland is a low cost, effective technology and it is still in the state of improvement to enhance the treatment efficiency, especially in nutrient and trace elements treatment. This study investigated the effect of aerobic and anoxic conditions in Horizontal Subsurface Flow Constructed Wetland (HSFCW) on nutrient, organic, metal and Octylphenol - OP (Endocrine disrupting chemical) treatment.

8p larachdumlanat127 02-01-2021 11 2   Download

A database containing chemical structures of 60 inhibitors and their Ki values was put into molecular operating environment (MOE) 2008.10 software, and the two-dimensional (2D) physicochemical descriptors were numerically calculated. After removing the irrelevant descriptors, a QSAR modeling was developed from the 2D-descriptors and Ki values by using the partial least squares (PLS) regression method.

5p larachdumlanat127 02-01-2021 21 2   Download

The local cohomology theory plays an important role in commutative algebra and algebraic geometry. The I-cofiniteness of local cohomology modules is one of interesting properties which has been studied by many mathematicians. The I-cominimax modules is an extension of I-cofinite modules which was introduced by Hartshorne.

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This research was approved by the Ethics Committee of Dong Nai General Hospital. The fingernail collected from 29 women with breast cancer and 30 healthy women, who are the same age and living in Dong Nai province, Vietnam. The concentrations of Fe, Se, and Zn in the fingernails were determined using the k0-INAA method. The analytical data were evaluated using some statistical analysis for the correlation of trace elements in the fingernails of both groups.

8p larachdumlanat127 02-01-2021 12 2   Download

The maceration was applied to the seeds of the plant to afford the crude extract which was then fractionated by liquid-liquid extraction to obtain the ethyl acetate extract. The extract was carried out by using normal phase silica gel column chromatography and thin-layer chromatography. Analysis of spectroscopic data including HR-ESI-MS, 1D and 2D-NMR and a comparison of the NMR data with that in the literature led to the structural elucidation of isolated compounds.

4p larachdumlanat127 02-01-2021 12 2   Download

In this study, we provide a greatly improved precision of estimations using the LISE code by evaluating the energy loss straggling of the alpha particles at 5.486 MeV in Tb, Ta, and Au materials. After comparing with the observables, it was found that the ratio of the energy loss straggling computed by the LISE code to that measured in experiments has a fairly large range of 1.5 - 3.0.

6p larachdumlanat127 02-01-2021 9 1   Download

A gas metal arc welding robot was used to build a thin-walled component made of mild steel on a low-carbon substrate according to the AM principle. Thereafter, the specimens for observing microstructures and mechanical properties were extracted from the built thin-walled component. The microstructures of the specimen were observed by an optical microscope; the hardness was measured by a digital microhardness tester, and the tensile tests were carried out on a tensile test machine.

8p larachdumlanat127 02-01-2021 11 2   Download

Understanding the binding mechanism between gold nanoparticles and biomolecules is a fundamental step for numerous applications in biosensors and targeted drug delivery. This study aims to clarify the adsorption behaviors of CYS and GSH on the gold surface using a small gold Au8 cluster as a model reactant.

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In this paper, the subproblem method with using edge finite elements is proposed for coupling subproblems via several steps to treat and deal with some troubles regarding to electromagnetic problems that gets quite difficulties when directly applying a finite element method. In the strategy subproblem method, it allows a complete problem to define into several subproblems with adapted dimensions. Each subproblem can be solved on its independent domain and mesh without performing in whole domain or mesh. This easily supports meshing and decreases computing time.

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Brucellosis is known as undulant fever or Malta fever, caused by the genus Brucella. It is the most common human zoonosis. The disease is worldwide distributed and causes significant economic losses. In animals, it causes abortion, reduction in milk production, and infertility. While brucellosisin humans is a debilitating disease with various clinical manifestations that may lead to death in some cases.

9p larachdumlanat127 02-01-2021 9 1   Download

G-quadurplex (G4) formation plays a role in many biological processes such as replication, transcription, translation, and telomeric maintenance. Stabilization of G4 structure by peptide has recently emerged as a potential approach in the regulation of protein expression. In this study, we reported on regulation of cyan fluorescent protein (CFP) expression by the interaction of G4 and RNA helicase associated with AU-rich elements (RHAU) peptide in E. coli.

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This paper details the successful brand `Orange fibre', its journey from scratch, and the properties of textiles made from processing orange peel waste. The current areas of research have also been covered in a brief way, to invite more scholars to create solutions for the hitherto pollution orange peel waste.

9p larachdumlanat127 02-01-2021 18 4   Download