Sustainable Development of Enterprises: Barriers and Policy Recommendations

Enterprise development towards sustainability is a strategy that needs to set for enterprises if all existing and long-term development in the context of deeper integration and intense competition. In order to achieve the objective of sustainable development of enterprises, on the one hand, there is a need for changes of enterprises themselves, on the other hand, need to be oriented and supported by the state. In the context of open economy and fierce competition, Vietnamese enterprises have encountered barriers to the implementation of sustainable development. This study gives the concepts of sustainable enterprise development that emphasizes enterprise development activities. Then, from the identification and multidimensional analysis of these barriers, recommendations have been proposed to unravel in order to achieve the goal of sustainable enterprise development in the coming time. Keywords: Enterprise, Sustainable, Green, Technology, Energy, Quality DOI: 10.7176/JESD/10-16-11 Publication date: August 31st 201

Simulation of non‑dilute fibre suspensions using RBF‑based macro–micro multiscale method

The multiscale stochastic simulation method based on the marriage of the Brownian Configuration Field (BCF) and the Radial Basis Function mesh-free approximation for dilute fibre suspensions by our group, is further developed to simulate non-dilute fibre suspensions. For the present approach, the macro and micro processes proceeded at each time step are linked to each other by a fibre contributed stress formula associated with the used kinetic model. Due to the feature of non-dilute fibre suspensions, the interaction between fibres is introduced into the evolution equation to determine fibre configurations using the BCF method. The fibre stresses are then determined based on the fibre configuration fields using the Phan–Thien–Graham model. The efficiency of the simulation method is demonstrated by the analysis of the two challenging problems, the axisymmetric contraction and expansion flows, for a range of the fibre concentration from semi-dilute to concentrated regimes. Results evidenced by numerical experiments show that the present method would be potential in analysing and simulating various suspensions in food and medical industries

Growth, survival and food utilization efficiency of longfin batfish (<em>Platax teira</em> Forsskål, 1775) larvae reared under different salinity levels

Salinity is crucial in fish larval rearing. In longfin batfish (Platax teira), little research has been conducted regarding the specific effects of salinity on growth, survival, deformity, and food utilization efficiency. This study aimed to determine the optimal salinity level for larval rearing of the longfin batfish by testing five different salinity levels (10, 15, 20, 25, and 30‰). Larvae of 1.5 cm in length and 0.2 g/fish in weight were stocked in cylindrical fiberglass tanks (300 L) at a density of 1 fish/L. The fish were fed to meet their dietary requirement and divided into four daily feedings. Each treatment was replicated three times over a 28-day period of rearing. The results revealed that salinity significantly influenced the growth (length, weight, biomass), and food utilization efficiency of the longfin batfish larvae. Overall, larvae reared at salinity levels of 15-20‰ exhibited superior performance compared to those exposed to salinity levels of 10, 25, and 30‰. However, salinity did not affect the coefficient of variation, survival, and deformity. From these findings, it is recommended to rear longfin batfish larvae at a salinity of 15-20‰ to achieve optimal growth and food utilization efficiency. This study provides valuable insights for longfin batfish larval rearing guidance, contributing to the aquaculture development of this economically valuable species

Rural tourism development in Quy river islet, Ben Tre province altogether with building new rural area

Researching and developing rural tourism in association with new rural construction has become a trending research in line with the Government\u27s orientation, towards development companies. By fieldwork method altogether with S.W.T.O analysis, the author team managed to survey and research potential in exploiting rural tourism in Con Quy, Ben Tre province in association with the new rural construction force. Since then, provide solutions through tourism to help preserve the cultural features of traditional farmers, humanism values are reserved and passed down in villages. Besides, it helps reconstructing of economy effciently and successfull

Real-time Damper Force Estimation for Automotive Suspension: A Generalized H2/LPV Approach

The real-time knowledge of the damper force is of paramount importance in controlling and diagnosing automotive suspension systems. This study presents a generalized H2/LPV observer for damper force estimation of a semi-active electro-rheological (ER) suspension system. First, an extended quarter-car model augmented with the nonlinear and dynamical model of the semi-active suspension system is written into the quasi-LPV formulation. Then, the damper force estimation method is developed through a generalized H2/LPV observer whose objective is to handle the impact of unknown road disturbances and sensor noise on the estimation errors of the state variables thanks to the H2 norm. The measured sprung and unsprung mass accelerations of the quarter-car system are used as inputs for the observer. The proposed approach is simulated with validated model of the 1/5-scaled real vehicle testbed of GIPSA-lab. Simulation results show the performance of the estimation method against unknown disturbances, emphasizing the effectiveness of the damper force estimation in real time

Hardware Architectures of Visible Light Communication Transmitter and Receiver for Beacon-based Indoor Positioning Systems

High-speed applications of Visible Light Communications have been presented recently in which response times of photodiode-based VLC receivers are critical points. Typical VLC receiver routines, such as soft-decoding of run-length limited (RLL) codes and FEC codes was purely processed on embedded firmware, and potentially cause bottleneck at the receiver. To speed up the performance of receivers, ASIC-based VLC receiver could be the solution. Unfortunately, recent works on soft-decoding of RLL and FEC have shown that they are bulky and time-consuming computations. This causes hardware implementation of VLC receivers becomes heavy and unrealistic. In this paper, we introduce a compact Polar-code-based VLC receivers. in which flicker mitigation of the system can be guaranteed even without RLL codes. In particular, we utilized the centralized bit-probability distribution of a pre-scrambler and a Polar encoder to create a non-RLL flicker mitigation solution. At the receiver, a 3-bit soft-decision filter was implemented to analyze signals received from the VLC channel to extract log-likelihood ratio (LLR) values and feed them to the Polar decoder. Therefore, the proposed receiver could exploit the soft-decoding of the Polar decoder to improve the error-correction performance of the system. Due to the non-RLL characteristic, the receiver has a preeminent code-rate and a reduced complexity compared with RLL-based receivers. We present the proposed VLC receiver along with a novel very-large-scale integration (VLSI) architecture, and a synthesis of our design using FPGA/ASIC synthesis tools

Igf2 Gene Expression Levels in Wild-Type and Mutant Mice

Genomic imprinting occurs where only one allele of a gene is expressed depending on its parental origin. The imprinted Igf2 gene (Insulin-like growth factor 2) is encoding a growth factor, which play an important role in embryonic development and formation of the placenta. The regulation and expression of Igf2 is carried out by different promoters. Promoter expression is extremely complex in wild-type mice during development and is altered in several mutant mice bearing deletions at the Igf2/H19 locus. In this work, we analyzed the Igf2 RNA expression of the placenta-specific P0 promoter in placental tissue (embryonic day 17) of both wild-type and mutant mice. For all the other promoters, we used RNA extracted from liver tissues (postnatal day 7.5). All these RNAs were reverse transcribed to cDNA before quantifying expression levels of the promoters by quantitative PCR (qPCR).Our results show that transcriptions of Igf2 P2 and P3 promoters are the highest in all mice analyzed, except in ΔU2/Dom mutant mice where P0 and P1 promoters were highly expressed, while they display low expression in all the other mice strains analyzed. Furthermore, all promoters were stably expressed at high levels in wild-type and ΔU2/Dom mutation, but at a low level in Δ3/Do

Mechanism of Inverse Magnetoresistance in High-TaT_{a} Annealed MnNi/Co/Ag(Cu)/Py Spin Valves

The magnetic transport properties -- magnetoresistive (MR) effects of MnNi/Co/Ag(Cu)/\break Py pinned spin valve structures (SVs) prepared by rf sputtering method and annealed at $T_{a} = 100$°C - 500°C for 30 minutes in high vacuum ($\sim 10^{ - 5}$ torr) are investigated. The received results show a change in the observed MR behaviors from a normal giant magnetoresistance effect to an inverse magnetoresistance effect after annealing at high temperatures, 300°C and 400°C, for these SVs. The origin and mechanism of the IMR behavior are analyzed and discussed. These results will suggest an ability to manufacture SV devices used the IMR effect for enhancing the application capacities for SV-sensor systems