コウヒンシツ ハンドウタイ ハクマク オヨビ ナノ リュウシ ノ チョウ ホウシャ ノ ケンキュウ

this is the author’s version of a work that was accepted for publication in Journal of Crystal Growth. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Crystal Growth, 378, (2013), doi:10.1016/j.jcrysgro.2012.12.10

Research on Urban Land Use Change in Ha Noi, Viet Nam Using Remote Sensing and GIS for Planning Oriented Work

Currently, 55% of the world’s population lives in urban areas, this proportion is expected to increase to 68% by 2050. In the next 30 years, a large amount of the world's population is predictably concentrated in urban areas in the developing world. Ha Noi is the capital and largest city of Viet Nam which has the average growth rate of approximately 3% per year. Urban development management has become an important issue in Viet Nam since the negative impacts of the urban sprawl on the environmental sustainability, life quality has been increasing as well. Hence, urban planning and management would be pivotal for creating the effective framework conditions for a sustainable development. The objective of our study is to explore the urban growth of Ha Noi using the Landsat images from 1975 to 2020 compared to the city planning. The volatility analysis information from classified urban land maps is considered supportive for urban management and planning oriented work. In addition, the remote sensing data analysis is a useful tool to support planners, managers for urban management and decision. This study results showed the urban land area in study site city has been growing about 3 times and the largest rate (4-6 times) for the Dong Anh, Tu Liem, Gia Lam and smallest rate (10-25%) for Ba Dinh and Hai Ba Trung districts

STUDY OF NEGATIVE REFRACTIVE INDEX IN Rb FOUR-LEVEL N-TYPE ATOMIC GAS MEDIUM

In this work, we study the generation of a negative refractive index based on electromagnetically induced transparency (EIT) in a Rb four-level N-type atomic gas medium. We derive analytic expressions for the relative permittivity and relative permeability of the medium according to the parameters of the probe, pump, and signal laser fields. We then investigate the variation of the real parts of the relative permittivity and relative permeability with respect to the intensity and frequency of the pump and signal laser fields. In the presence of the pump laser beam, the medium becomes transparent to the probe laser beam even in the resonant region. At the same time, the real parts of the relative permittivity and relative permeability are simultaneously negative (i.e., the medium exhibits a negative refractive index) in the EIT spectral domain. In the presence of the signal laser beam, the EIT effect occurs over two different frequency domains of the probe beam, so a negative refractive index is also generated in these two frequency domains. The investigation of the real parts of the relative permittivity and relative permeability with intensity and frequency of the pump and signal laser fields allowed us to find the laser parameters for the appearance of the negative refractive index, which can be useful for experimental observations

Software coupling and Orchestration Tool to the Modeling of Multi-physic Problem

International audienceWe present in this paper Scot, which is a modular software solution for weakly coupling models, methods and orchestration of the simulation. The goal behind Scot is to make easier the phase of modeling and optimize the phase of simulation by tuning the solvers simulation parameters. Specifications and composition of Scot will be described. Scot has been successfully validated by two different applications, the PEEC-MoM coupling to the modeling of an electromagnetic device and the magneto-mechanic coupling to the modeling of deformable nano-switch contact NEMS

Carrot hairy roots (Daucus carota L.) characterisation and optimisation for high β‐carotene extraction

Hairy roots are widely known as a biological system for the production of highly diverse biomolecules. β‐carotene – a precursor for vitamin A – is known to be an anti‐oxidant and anti‐gastric cancer and protection agent against cardiovascular disease, heart disease and stroke. β‐carotene has been chemically synthesised and consumed by humans. However, the chemical process often produces a by‐product that may be harmful to human health. Therefore, this study established a protocol to induce hairy roots (HRs) from a Vietnamese carrot variety and produce natural β‐carotene. The Rhizobium rhizogenes ATCC15834 harbouring Ri plasmid and a Vietnamese carrot variety were used as materials for genetic transformation and HR induction studies. The result showed that approximately 50 HR lines were obtained. Culture medium supplemented with 30 mg/L of sucrose that gave the highest biomass of HR was shown in carrot HR line 30, which had a doubling time of 6.5 days. The highest content of β‐carotene extraction, at 128 mg/100g hairy roots, was achieved with a ratio volume (v/v) of 2‐propanol and plant samples of 20:1, followed by two hours’ incubation with 2‐propanol at 60 °C. Our study reveals a highly efficient protocol for Vietnamese carrot hairy root establishment and multiplication. A very efficient protocol for β‐carotene extraction from the hairy root was established to produce natural β‐carotene that achieves the same β‐carotene quantity as that produced by normal roots. This study provides new insight into the production of high‐content and natural β‐carotene for therapeutic application

Assessment of Antioxidant and Antibacterial Activities of Lactobacillus farciminis HN11 as a Probiotic Candidate

Background and Objective: Lactobacillus farciminis is an obligate homofermentative bacterial species in fermented foods. Although other species such as Lactobacillus plantarum, Lactobacillus acidophilus, Lactobacillus casei and Lactobacillus rhamnosus in Lactobacillus genus have been well characterized, probiotic characteristics of Lactobacillus farciminis still need to investigate. Thus, the objective of this study was to investigate probiotic characteristics and antibacterial activity of Lactobacillus farciminis HN11 isolated from Solanum macrocarpon sauces in Hue city, Vietnam. Material and Methods: Lactobacillus farciminis HN11 was cultured in Rogosa and Sharpe media and antibacterial activity of the free-cell suspension was assessed against Escherichia coli, Vibrio parahaemolyticus K5, Vibrio parahaemolyticus KS-02, Vibrio owensii KS-05, Vibrio alginolyticus KS-08, Vibrio alginolyticus A1-1 and Staphylococcus aureus using agar well diffusion method. Various probiotic characteristics of the isolate including antibacterial and antioxidant activities, autoaggregation and coaggregation were assessed. Furthermore, hemolytic and amino-acid dercarboxylase activities were assessed for biosafety assessment. The strain abilities to resist sodium chloride and bile salts were assessed as well. Results and Conclusion: Lactobacillus farciminis HN11 exhibited significant resistance to NaCl and bile salts. The strain expressed high coaggregation abilities for Escherichia coli, significant autoaggregation abilities and antibacterial activities against Vibrio spp. and Escherichia coli. Antioxidant assessment showed that Lactobacillus farciminis HN11 contained high antioxidant activities. This strain was negative for hemolytic and amino-acid dercarboxylase activities. Moreover, ampicillin and chloramphenicol inhibited growth of Lactobacillus farciminis HN11. This study assessed characteristics of Lactobacillus farciminis HN11 and showed its great potentials as a probiotic in fermented foods, enhancing antioxidant and decreasing harmful foodborne bacteria. Although, encapsulation of the strain within acid resistance materials is suggested to better protect it against high-acid contents of the stomach. Conflict of interest: The authors declare no conflict of interest

Optimal design parameters of air suspension systems for semi-trailer truck. Part 2: results and discussion

Based on the results of model and algorithm in Part1 for searching the optimal design parameters of vehicle suspensions using genetic algorithm, in Part 2, the simulation results with MATLAB Simulink combined with an optimal program are written to search the optimal design parameters of vehicle air suspension systems in two optimal conditions. The optimal results indicate that the DLC values at all axles of vehicle respectively reduce by 9.09 %, 10.71 %, 11.11%, 10.81 %, 8.82 % (in Case 1) and 14.29 %, 19.23 %, 20.00 %, 17.14 %, 12.12 % (in Case 2) in comparison with the original air suspension systems when vehicle moves on the ISO class C road surface at v= 20 m/s and full load. All these things indicate that using the genetic algorithm optimization method does not only reduce the tire dynamic loads acting on road surface but also improves the ride comfort. Finally, the optimum performance of vehicle suspension systems is considered and reassessed under different operating conditions. The evaluation results indicate that the optimum performance of the air suspension systems has better potential to improve the road friendliness which provides a ride comfort for road surfaces and vehicle

Optimal design parameters of air suspension systems for semi-trailer truck. Part 1: modeling and algorithm

The purpose of this paper is to improve the performance of air suspension systems for a semi-trailer truck in the direction of reducing the dynamic wheel load acting on road surface (Part 1: modeling and algorithm). To achieve the goal of finding the optimal design parameters for the air suspension systems, a half-vehicle dynamic model under the road-vehicle interaction with 12 degrees of freedom (d.o.f) is established for searching the optimal design parameters of vehicle suspensions using genetic algorithm (GA). Dynamic load coefficient (DLC) is considered as a target function. Two optimal conditions: optimal design of geometrical parameters of air spring suspension systems (Case 1) and optimal design of parameters of air suspension systems (Case 2) are selected in this study. The results of this paper are the basis for optimization and discussion in Part 2 as the results and discussion

PHÂN TÍCH VÙNG GENE trnL-trnF CỦA CÂY SÂM CAU (Curculigo orchioides) TỰ NHIÊN THU TẠI TỈNH THỪA THIÊN HUẾ

Curculigo orchioides, a member of the genus Curculigo and the family Hypoxidaceae, is a herbal plant and has been used as traditional medicine. Currently, there is high demand for cultivating this plant. However, there has not been sufficient research into the genetic diversity to assist the authentication of the material, for example, the genetic research based on the DNA indicators of Curculigo. In this study, the gene trnL-trnF region of 15 Curculigo orchioides germplasms collected from three locations in the province were sequenced and analyzed for identification and evolution. The results show that the sequenced fragment of the gene trnL-trnF from the surveyed samples has 99% similarity and 100% coverage compared with the NC 053892 sequence of Curculigo orchioides. We identified five haplotypes of C. orchioides in the province with a haplotype diversity coefficient (Hd) of 0.705 ± 0.088. The genetic distances ranged from 0 to 0.49% among the populations. The Curculigo orchioides population in Thua Thien Hue has evolved towards balanced, neutral, and random selection because of the lack of rare alleles.Sâm cau (Curculigo orchioides), thuộc chi Curculigo, họ Hypoxidaceae, là một loài thảo dược quý và đã được người dân tin dùng để chăm sóc và bảo vệ sức khỏe. Hiện nay, nhu cầu trồng cây Sâm cau ngày càng tăng cao, nhưng các nghiên cứu dựa trên các chỉ thị DNA của Sâm cau nhằm phát triển chỉ thị để tránh nhầm lẫn trong quá trình thu mua nguyên liệu ở dạng khô vẫn chưa có nhiều. Trong nghiên cứu này, vùng gene trnL-trnF của 15 nguồn gene Sâm cau thu hái từ ba khu vực thuộc tỉnh Thừa Thiên Huế đã được giải trình tự và phân tích nhằm phục vụ cho công tác định danh, phân loại và phân tích sự tiến hoá. Kết quả cho thấy vùng gene trnL-trnF của các mẫu nghiên cứu có trình tự tương đồng 99% và độ bao phủ 100% so với trình tự NC 053892 của loài Curculigo orchioides. Chúng tôi đã xác định được năm loại haplotype tại tỉnh Thừa thiên Huế với hệ số đa dạng haplotype (Hd) 0,705 ± 0,088. Mức độ khác biệt di truyền giữa các quần thể dao động từ 0 đến 0,49%. Quần thể Sâm cau ở tỉnh Thừa Thiên Huế tiến hoá theo hướng chọn lọc cân bằng, trung tính và quần thể ngẫu nhiên do thiếu các allen hiếm xuất hiện trong quần thể