BACKGROUND: Among the less invasive operations noted in recent years, laparoscopic gastrectomy (LG) for gastric cancer has become popular because of advances in surgical techniques. We have performed ...LG with D2 lymphadenectomy for 515 cases of gastric cancer between April 2009 and November 2019 at military hospital 103.
AIM: We aimed to presented the techniques and results of laparoscopic-assisted gastrectomy (LAG) for gastric cancer.
METHODS: Of the 515 gastric malignancy cases, distal gastrectomy was performed in 402 cases, proximal gastrectomy in 37 cases, and total gastrectomy in 76 cases. In all the cases, D2 lymph node dissection was performed according to the general rule of the Japanese gastric cancer association 3rd.
RESULTS: Quicker recovery was observed in the LG cases than in the open cases. The post-operative complications with this technique were within a permissible range. There was a statistical difference that was seen in the survival outcomes after LAG for gastric cancer between the laparoscopic-assisted distant, proximal, and total gastrectomy.
CONCLUSION: The laparoscopic technique is not only less invasive but also relatively safe and curative compared with open gastrectomy for advanced gastric cancer.
The exchange of goods between countries is growing, contributing to the promotion of logistics-related technologies. More and more systems are adopting advances in science and engineering to reduce ...manual handling steps, thereby reducing transit time. Letter-of-Credit (LOC) is a standard method where the parties involved will enter into agreements for the sale and exchange of goods. Specifically, each party will receive a set of original documents and does not need to meet face-to-face under the bank’s witness. The process brings many benefits in terms of time and reduces records processing. However, the system faces a lot of risks when one of the parties is dishonest. On the other hand, the traditional LOC systems face a lot of risks related to the transparency of information about the goods, and also the supplier may lose the goods (e.g., 4/100 Vietnamese cashew nut containers are lost. stuck in Italy) or deposits in the hands of shipping companies (e.g., GNN Express - Vietnam) and many more. To this end, many research directions have exploited blockchain technology and smart contracts. Specifically, all information related to the transaction between the supplier and the demander including package, time, and delivery location. However, there needs to be a mechanism to ensure the smooth implementation of smart contracts, specifically for sanctioning when there is a conflict between a supplier and a demander. This role should be considered for the transaction manager, who directly designs and is responsible for their smart contracts. Currently, there is no mechanism to guarantee all interests of the parties involved in non-bank transactions. To increase the processing capacity and integrate with the Blockchain system, we propose the Letter-of-credit Chain that defines the agreements between the parties in international trade. We also deploy the proof-of-concept of the Letter-of-credit Chain on the three EVM-supported platforms (i.e., under ERC20), namely, Ethereum, Binance Smart Chain, and Fantom. By evaluating the actual execution of Gas for each platform, we found that our proposed model had the cheapest fee when deployed on the Fantom platform. Finally, we share the deployment/implementation of these platforms’ proof-of-concept to encourage further future research.
More and more new health care solutions are born based on the development of science and technology. The subjects who benefit the most, in this case, are not only patients (i.e., shorter healing ...time, faster recovery) but also medical staff, e.g., doctors/nurses (i.e., easy monitoring of the patient’s recovery process, proposing new treatment). However, there are still products that have not found an alternative: blood and blood products. Regardless of how science and technology can affect all aspects of patient treatment as well as medical care, blood still plays an important role in the treatment method. In addition to the above, blood and blood products may only be obtained from volunteers (i.e., blood donors). The preservation process is also very difficult, and no medical facility has enough facilities to preserve them. Therefore, the current process of blood preservation and transportation is done manually and contains many potential risks (e.g., data loss, personal information collection). In addition to the above barriers, developing countries (including Vietnam) also face many difficulties due to limited facilities. It is for this reason that this paper aims at a Blockchain-based technology solution for efficient management and distribution of blood from blood products. On the one hand, the paper contributes to the limitations in the information management process of storing and transporting blood and its products in the traditional database being applied in medical facilities in the cities and provinces in the Mekong Delta (the West-South of Vietnam). On the other hand, the article offers technology-based solutions to increase transparency and reduce the fear of centralized data storage (i.e., security and privacy issues). We also implement a proof-of-concept to evaluate the feasibility of the proposed approach.
Accurate profiling of population‐specific recessive diseases is essential for the design of cost‐effective carrier screening programs. However, minority populations and ethnic groups, including ...Vietnamese, are still underrepresented in existing genetic studies. Here, we reported the first comprehensive study of recessive diseases in the Vietnamese population. Clinical exome sequencing data of 4503 disease‐associated genes obtained from a cohort of 985 Vietnamese individuals was analyzed to identify pathogenic variants, associated diseases and their carrier frequencies in the population. A total of 118 recessive diseases associated with 164 pathogenic or likely pathogenic variants were identified, among which 28 diseases had carrier frequencies of at least 1% (1 in 100 individuals). Three diseases were prevalent in the Vietnamese population with carrier frequencies of 2–12 times higher than in the world populations, including beta‐thalassemia (1 in 23), citrin deficiency (1 in 31), and phenylketonuria (1 in 40). Seven novel pathogenic and two likely pathogenic variants associated with nine recessive diseases were discovered. The comprehensive profile of recessive diseases identified in this study enables the design of cost‐effective carrier screening programs specific to the Vietnamese population.
Prevalent recessive diseases in Vietnam.
PurposeThe pupose of the paper is to study the usefulness of Piotroski (2000)'s F-score in separating winners and losers in Vietnam.Design/methodology/approachThe authors adopt a portfolio analysis ...and regression analysis on a sample of 501 of listed firms between 2009 and 2019 in Vietnam.FindingsThe authors find that a hedge strategy that buys high-F-score firms and sells low-F-score firms yield market-adjusted return of over 30 percent annually, which is statistically and economically significant. The hedge strategy based on F-score is not only profitable for value (high book-to-market BM) firms but also earn abnormal returns in a sample of growth (low BM) firms, suggesting that the usefulness of F-score strategy is not just a phenomenon in value firms as documented in previous literature.Research limitations/implicationsWhilst the authors' paper documents economically significant returns obtained from the F-score strategy, the authors do not examine what drives the abnormal returns.Practical implicationsThe results provide supporting evidence for the use of financial statement analysis as a screening tool to improve the performance of value investment in Vietnam stock market and for the training of financial reporting and fundamental analysis in universities.Originality/valueThe authors' research is the first study examining the F-score strategy in Vietnam that provides insights about the usefulness of fundamental analysis in separating winners and losers in a frontier market and contributes to the literature on fundamental analysis and market efficiency in emerging and frontier markets.
We consider a fishery model with two sites: (1) a marine protected area (MPA) where fishing is prohibited and (2) an area where the fish population is harvested. We assume that fish can migrate from ...MPA to fishing area at a very fast time scale and fish spatial organisation can change from small to large clusters of school at a fast time scale. The growth of the fish population and the catch are assumed to occur at a slow time scale. The complete model is a system of five ordinary differential equations with three time scales. We take advantage of the time scales using aggregation of variables methods to derive a reduced model governing the total fish density and fishing effort at the slow time scale. We analyze this aggregated model and show that under some conditions, there exists an equilibrium corresponding to a sustainable fishery. Our results suggest that in small pelagic fisheries the yield is maximum for a fish population distributed among both small and large clusters of school.
Insitu measurement of the activation kinetics of the slowly forming recombination center (SRC) of the boron-oxygen defect in compensated n- and p-type silicon (n-Si and p-Si) under high-injection ...conditions is realized through micro-photoluminescence measurements. The high-injection conditions significantly accelerate the defect activation. Another advantage of this method is that the injection level can be kept almost constant during the defect activation and in differently doped samples, as the high-injection lifetime is dominated by Auger recombination. Courtesy of this, the activation time constant remains steady during the activation of the defects, and the activation time constant and defect concentration in differently doped samples can be compared more directly. The results confirm that the defect activation rate constant is the same at high-injection levels in both n- and p-type samples, and that it only depends on the hole concentration p, but not on O i or B. The effective saturated defect concentration normalized with Oi 2 is independent of the doping in n-Si, and increases with the net doping in p-Si. The latent form reconfiguration model for the defect, instead of the Bs-O2i model, is considered to be more compatible with these findings.
Rickettsia felis, a zoonotic vector-borne bacteria, is reported globally in humans, animals, and its invertebrate hosts. This study was designed to detect antibodies against R. felis and the DNA of ...R. felis in blood of domestic dogs in the Central Highlands of Vietnam using immunofluorescence antibody test (IFAT), and ompB- and gltA-PCRs, respectively. Using IFAT, 23 out of 338 plasma samples collected from household dogs were seropositive for R. felis, accounting for 6.80% (CI 95%: 4.45–10.1%). Of 171 buffy coat samples from household dogs, 50 were positive for spotted fever group rickettsioses using ompB-PCR assay, accounting for 29.2% (CI 95%: 22.6–36.7%). The gltA-PCR assay detected R. felis in 30% (15/50) of ompB-positive samples. DNA sequencing of ompB-PCR and gltA-PCR products confirmed the presence of R. felis and Rickettsia sp. genotype RF2125 / R. asembonensis. Our findings suggest a potential risk of R. felis infection in the communities in the Central Highlands of Vietnam, and the reservoir role of dogs to Rickettsia sp. genotype RF2125.
•Rickettsia spp. were detected in 50/171 dogs in the Central Highlands of Vietnam.•Twenty three out of 338 (6.80%) household dogs were seropositive for R. felis.•R. felis was detected in 30% (15/50) household dogs.•DNA sequencing confirmed the presence of R. felis and Rickettsia sp. genotype RF2125 in dogs.
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