SCIENTIFIC JOURNAL OF TAN TRAO UNIVERSITY

EXPLORING THE POTENTIAL OF FOG COMPUTING: APPLICATIONS, CHALLENGES, AND FUTURE DIRECTIONS

Vu Thi Nguyet, Nguyen Thuy Dung — Thu, 16 Jan 2025 00:00:00 +0700

This paper explores the significance and potential of fog computing, an emerging paradigm that extends cloud computing to the network edge. The objective is to provide a comprehensive analysis of fog computing by examining its meaning, historical context, potential applications, technical challenges, and relationship with cloud computing. The study reveals that fog computing aims to optimize latency, bandwidth usage, and resource utilization by bringing data processing and storage closer to the data source. It introduces categories such as Storage in Fog (StiF), Web in Fog (WiF), and Infrastructure as Fog (IaF), each with unique characteristics aligned with fog computing principles. The paper highlights the importance of addressing technical challenges in hardware, operating systems, networks, databases, and browsers/servers to fully realize fog computing's potential. Additionally, it establishes fog computing as a complementary component to cloud computing, filling the gaps and unlocking the full potential of cloud computing by catering to on-premises computer systems. The paper also identifies future research directions in fog computing, including fog-cloud collaboration, service scalability, fog scalability, fog-based dedicated applications, mobile fog computing, fog federation, energy consumption and communication efficiency tradeoff, duration of local data storage, storage and communication security, and semantic-aware fog computing. Addressing these research directions will pave the way for innovative applications and advancements in fog computing, enabling efficient and intelligent edge computing solutions in various domains.

SYNTHESIS OF NOVEL 1,3,4-OXADIAZOLE DERIVATIVES INCORPORATING A BENZOFURAN MOIETY

Nguyen Tan Tai — Thu, 16 Jan 2025 00:00:00 +0700

To further explore the highly bioactive properties of benzofuran and 1,3,4-oxadiazole derivatives, the synthesis of 1,3,4-oxadiazole derivatives containing a benzofuran moiety was undertaken. A straightforward and efficient four-step synthetic method was employed, utilizing readily available starting materials to prepare novel functionalized 1,3,4-oxadiazole derivatives. As a result, two 1,3,4-oxadiazole derivatives were obtained with moderate yields. The structures of all synthesized compounds were characterized using spectroscopic techniques.

ON THE STABILITY OF IMPLICIT INTEGRO-DYNAMIC EQUATION ON TIME SCALES

Nguyen Thu Ha — Thu, 16 Jan 2025 00:00:00 +0700

This paper deals with the robust stability of implicit integro - dynamic equations. We consider the solvability of the equation and then the preservation of exponential stability under small perturbations

RESEARCH ON THE SOWING DATE FOR F1VA.68 CUCUMIS MELON VARIETY IN SPRING SEASON IN TUYEN QUANG

Nguyen Thi Minh Hue, Doan Thi Phuong Ly, Cai Thi Lan Huong — Thu, 16 Jan 2025 00:00:00 +0700

Cucumis Melon (Cucumis melon L.) is a fruit vegetable with high nutritional value, currently cultivated in multiple seasons, across various soil types, and in many regions throughout the year. However, to ensure optimal growth and maximum economic efficiency, it is crucial to consider several factors such as variety selection and appropriate planting time within favorable climatic conditions. These factors can maximize the variety's potential and minimize pest damage while maintaining high effectiveness. An experiment planting the F1VA.68 melon variety at different times during the Spring 2022 season in Tuyen Quang showed that planting on February 20, 2022, resulted in a yield of 114.4 quintals per hectare and achieved the highest economic efficiency of 80,183,400 VND per hectare, while still allowing for optimal scheduling of crop rotation for the following season.

EFFECTS OF ANTIOXIDANTS TO ENHANCE SHELF LIFE OF POST-HARVEST CURTARD APPLE (ANNONA SQUAMOSA L.)

Trinh Thi Chung, Pham Thi Vinh, Tran Van Chi, Luu Hong Son, Nong Thi Hai Yen — Thu, 16 Jan 2025 00:00:00 +0700

This study evaluates the effectiveness of extending the shelf life of custard apple (Annona squamosa L.) harvested in Lang Son through treatment with different antioxidants, including sodium benzoate (SB) 500 solution. and 1000 ppm, ascorbic acid (AA) 500 and 1000 ppm, benzyl adenine (BA) 50 and 100 ppm and stored at cool temperature at 15 ± 20C. The experiment was evaluated based on the parameters of physiological loss in weight (PLW), ripening (%), storage life, spoilage, firmness and total soluble solids (TSS ⁰Brix). Initial research shows that antioxidants are significantly effective on some post-harvest quality parameters of custard apple, in which post-harvest treatment with BA (50 ppm or 100 ppm) significantly reduce weight loss, slow down physiological ripening time, reduce spoilage rate and increases the storage life of custard apples to 14.5 days compared to only 8.5 days for untreated fruits.

STUDY ON THE STRUCTURE AND FUNCTION OF PYROLYSIS KILNS FOR PRODUCING VARIOUS TYPES OF BIOCHAR FROM AGRICULTURAL BY-PRODUCTS

Thu, 16 Jan 2025 00:00:00 +0700

The technology of anaerobic pyrolysis kilns in biochar (BC) production has demonstrated success and efficiency in recent years. Research shows that the structure of the pyrolysis kiln consists of a kiln body and a lid. The kiln body is robustly designed to withstand high pressure and temperature. The lid incorporates a condenser and activated carbon, which serve to process gases such as CO2, CH4, CnHn, etc., ensuring no air pollution. Moreover, experimental studies have outlined the “biochar production process” using anaerobic pyrolysis kilns, which includes five steps: (i) raw material preparation, (ii) raw material preprocessing, (iii) biochar burning/firing, (iv) biochar cooling, and (v) biochar preservation and storage. Notably, the biochar production process using pyrolysis kiln technology generates a by-product called wood vinegar, a type of “pyroligneous acid” solution that benefits the environment and offers commercial value. This is considered a “green” product with promising potential applications in the future.

A RESULT ON THE FINITENESS OF COASSOCIATED PRIMES OF LOCAL HOMOLOGY WITH RESPECT TO A PAIR OF IDEALS

Do Ngoc Yen — Thu, 16 Jan 2025 00:00:00 +0700

We introduce the concept local homology with respect to a pair of ideals,
which is dual to the generalized local cohomology and extension from the local homology module. 
We also study about some properties of these modules and give a result on the finiteness of coassociated primes of these modules.

Effects of benzyl adenine (BA) on post-harvest quality of curtard apple

Trinh Thi Chung, Pham Thi Vinh — Thu, 16 Jan 2025 00:00:00 +0700

This study aims to evaluate the effectiveness of benzyl adenine (BA) on custard apple (Annona squamosa L.) fruit (collected in Lang Son) after harvest to prolong storage life. The experiment was treated with BA at different concentrations of 50 ppm, 100 ppm and 150 ppm. Initial research shows that BA was significantly effective in extending the storage life of custard apples through affecting some quality parameters of post-harvest custard apples, including reducing physiological weight loss (PWL), slowing down ripening time, maintaining firmness and reducing spoilage rate. Samples treated at BA 150 ppm showed better results, helping to extend the storage life of custard apple to 6.5 days compared to the control.

RESEARCH AND DEPLOYMENT OF MONGODB DATABASE MODEL FOR HANOI VIETNAM VPBANK

Bui Hai Phong; Lai Duc Anh — Thu, 16 Jan 2025 00:00:00 +0700

MongoDB is a powerful and popular NoSQL database management system, especially in the information technology industry, MongoDB plays an important role in database deployment and management. Currently, MongoDB has initially completed the deployment of the database model for banks in Vietnam. The implementation processes for applying MongoDB to large database systems are complete, and the bank's database system is also very rich. Besides the advantages, there are also difficulties when building the system, so applying the MongoDB database model from the university training process plays an important role in developing the database system. MongoDB database in Vietnam.

RESEARCH ON WEBSITE DESIGN SYSTEM OF TAN TRAO UNIVERSITY AND SPECIALIZED FACULTIES

Te Trung Hieu, Do Huu Son, Phan Van Nam — Thu, 16 Jan 2025 00:00:00 +0700

In the digital age, websites play a crucial role in education, serving as tools for information delivery, user interaction, and organizational branding. The current website of Tan Trao University exhibits several limitations in terms of interface, functionality, and scalability, particularly on mobile devices, which negatively impacts user experience. This study focuses on designing and developing a new website system for Tan Trao University and its academic departments to address these limitations.

The research analyzes the current state of the existing website, draws insights from similar educational website models, and applies modern web development methodologies to enhance user experience (UX) and user interface (UI). The result is a comprehensive website solution that improves communication efficiency and content management while contributing to the professional and reputable image of the university.

RESEARCH ON DESIGN OF IOT DEVICES FOR COMPUTER ROOM SAFETY MONITORING

Vu Thi Khanh Trinh, Pham Nhat Minh, Nguyen Cong Nhat Minh — Thu, 16 Jan 2025 00:00:00 +0700

The use of IoT devices to monitor temperature and humidity, as well as detect fire explosions within the computer, is critical for experiment safety and efficiency. IoT devices can identify fire explosions and dangers early on, allowing them to safeguard costly equipment and assets, keep the environment steady, and improve experiment accuracy. Furthermore, it enables continuous remote monitoring, saving both time and effort. When an event occurs, IoT quickly transmits alerts, allowing for rapid response, reducing losses, and preserving costs. Based on these requirements, the research proposes options for designing IoT devices, including temperature-humidity and smoke sensors incorporated on a web server platform to monitor computer room safety.

STUDY FOR THE CHEMICAL COMPOSITION OF CANAVALIA CATHARTICA COLLECTED IN CAN GIO - HO CHI MINH CITY

Tran Duc Dai, Nguyen Van Tuan, Tran Ba Kien, Nguyen Ngoc Linh, Pham Van Mung — Thu, 16 Jan 2025 00:00:00 +0700

Canavalia cathartica, commonly known as maunaloa is a species of flowering plant in the legume family, Fabaceae. Leaves and branches of Canavalia cathartica were collected in Can Gio, Ho Chi Minh city. From dichlomethane extract of the aerial parts of Canavalia cathartica Du Petit-Thouars. led to the isolation and structural elucidation of three compounds including ursolic acid 1, β-sitosterol 2, daucosterol 3. Their structures were elucidated by the analysis of the IR, MS and NMR 1D and 2D spectra.

COAP AND MQTT PROTOCOLS IN THE INTERNET OF THINGS

Vu Thi Nguyet, Nguyen Thuy Dung — Thu, 16 Jan 2025 00:00:00 +0700

Alongside the explosion and development of technology, the Internet of Things (IoT) - the network that connects everything to the internet - can be considered the trend and future of the world. In order for devices to communicate with each other, they will require one or more protocols, which can be seen as specialized languages to solve specific tasks. This paper aims to survey the two most promising protocols for the application layer in the IoT network: MQTT (Message Queuing Telemetry Transport) and CoAP (Constrained Application Protocol). Based on research results on architecture, transmission methods, publish/subscribe mechanisms, response/acknowledgment, security, and Quality of Service (QoS), a comparison between the two protocols will be conducted, followed by observations on their application scopes for IoT designs.

EFFECTS OF PREDATORS ON TWO OYSTER SPECIES (CRASSOSTREA RIVULARIS AND CRASSOSTREA GIGAS) FARMED IN CAN GIO COASTAL AREA

Thu, 16 Jan 2025 00:00:00 +0700

Results of research on predator species on two oyster species (Crassostrea rivularis and Crassostrea gigas) from January to December 2022 in the Can Gio coastal estuary, have identified 22 predator species in 13 families belonging to 6 groups (Arthropoda, Coelenterata, Mollusca, Platyhelminthes, Polychaeta and Rhodophyta). Among them, the most diverse are Molluscs with 10 species, polychaetes with 5 species, arthropods with 4 species, Coelenterata, Echinaceans, flatworms and red seaweeds with only 1 species.

The highest frequency of encountering 10 enemy species of estuarine oysters is Thalamita sima with 18,52%, Thalasina anomala with a frequency of 15,74% of the total number of enemy species. Other species have low encounter frequencies (f ˂ 15%); The highest frequency of encountering 12 species of predators of Pacific oysters is Actiniidae sp. with 18,13%, Amphibalanus amphitrite has a frequency of 17,54% of the total number of enemy species. Other species have low encounter frequencies (f ˂ 16%).

EVALUATION OF DOMESTIC WASTEWATER TREATMENT CAPACITY OF THE OXIDATION DITCH SYSTEM AT GIA SANG WASTEWATER TREATMENT PLANT, THAI NGUYEN CITY, THAI NGUYEN PROVINCE

Du Ngoc Thanh — Thu, 16 Jan 2025 00:00:00 +0700

Through research and evaluation, we have some conclusions as follows: 1.The operation of the Oxidation ditch system in the first and second months is not really stable. Ammonium parameters (NH4+) in wastewater after treatment are very high at 19.13 to 19.42 mg/l, not meeting QCVN 14/2008 BTNMT. The parameters pH, BOD, TSS, TDS, Phosphorus, total coliform, etc. in treated wastewater all meet allowed standards. 2. After adjusting a number of operating parameters, the operation of the Oxidation ditch system in the months of March, April, May, June is quite stable, good treatment, all parameters to evaluate the quality of wastewater after treatment such as NH₄+, NO₃-, pH, BOD, TSS, PO₄^3-, total Coliform all meet QCVN 14/2008 BTNMT. 3. The organic matter treatment efficiency of the Oxidation ditch system in the first six months of the year reached 83-100%. In January and February, the ammonium treatment efficiency is low, only reaching 39.6 to 41.9%, and in months March, April, May, and June, the efficiency is high from 90 to 100%.

ASSESSMENT OF LAND USE EFFICIENCY FOR SELECTED KEY CROPS IN BAC SON SƠN DISTRICT, LANG SON PROVINCE

Nguyen Thuy Linh, Chu Van Trung, Nguyen Ngoc Anh, Hoang Huu Chien — Thu, 16 Jan 2025 00:00:00 +0700

Bac Son is a mountainous district in Lang Son province, where agricultural land occupies 79.24% of the natural land area. Based on 2 factors, the district has identified three key crops: golden tangerine (quýt vàng), tobacco, and red peanut. The assessment reveals that tobacco cultivation yields moderate economic efficiency (6 points), while golden tangerine and red peanut land use show high economic efficiency, with 9 and 8 points, respectively. All three main crops exhibit high social benefits, with golden tangerine identified as especially promising, due to its economic potential and widespread acceptance among local farmers. Among these three main crops, golden tangerine provides the highest environmental benefits, offering complete soil coverage (100%) and compliance with recommended pesticide and fertilizer use. The other two crops require better management of fertilizer and pesticide application. Moving forward, a increasing investments in agricultural inputs and advancing cultivation techniques are recommended to ensure these crops continue to contribute to the economic well-being of Bac Son’s residents.

STUDY ON THE STRUCTURE AND FUNCTION OF PYROLYSIS KILNS FOR PRODUCING VARIOUS TYPES OF BIOCHAR FROM AGRICULTURAL BY-PRODUCTS

Thu, 16 Jan 2025 00:00:00 +0700

Nonlocal Rayleigh-Stokes Flows: Existence and Regularity Results

Nguyen Nhu Quan — Thu, 16 Jan 2025 00:00:00 +0700

We investigate the Rayleigh-Stokes problem for a generalized second-grade fluid with a fractional time derivative. Our study aims to prove the existence and regularity of classical solutions using fixed point techniques and asymptotic estimates of the resolvent operator.

g - 2)eiM ANOMALIES AND LEPTON FLAVOR VIOLATING DECAYS IN A TWO HIGGS DOUBLET MODEL: INVERTED ORDER SCHEME OF NEUTRINO OSCILLATION DATA

Thu, 16 Jan 2025 00:00:00 +0700

The lepton flavor violating decays h —> e±ej, z -» e±ej, and
—> ea7 in a two-Higgs-doublet model have been discussed in (T. T. Hong et al, 2024). Still, only the normal order (NO) scheme of the neutrino oscillation data was used for numerical investigation. In this work, we will show numerical results corresponding to the inverted order (IO) scheme and compare them with those predicted by the NO scheme. In addition, we focus on the dependence of all lepton flavor violating decays as functions of the heaviest active neutrino masses, which was not shown in detail previously. Our results confirm the consistency with a recent work (T. T. Hong et al, 2024) in all allowed values of the heaviest active neutrino mass.

TỐI ƯU HOÁ QUY TRÌNH CHIẾT XUẤT VÀ ĐÁNH GIÁ HOẠT TÍNH SINH HỌC CỦA TINH DẦU LÁ TRÀ HOA ĐỎ (CAMELLIA RUBRIFLORA)

Thu, 16 Jan 2025 00:00:00 +0700

The objective of the study is to investigate the chemical composition and biological activity of the essential oil of Camellia rubriflora leaves in Sin Ho, Lai Chau. Using the steam distillation method to extract the essential oil. The chemical composition of the essential oil was determined by gas chromatography-mass spectrometry (GCMS). The antioxidant capacity of Camellia rubriflora leave essential oil was evaluated by using the DPPH free radical method. The results of the study determined that Camellia rubriflora essential oil has 20 components, including: esters with the highest proportion (39.62%), followed by flavonoids (34.86%), phenols (12.23%), acids (12.63%) and other compounds. Camellia sinensis leaf essential oil has antioxidant activity IC50 = 12.03 μg/ml. These research results provide the basis for further research and development of functional products and health care products from the chemical composition of this plant.

THE LIMIT CONDITIONS FOR TRAPPING OF MICROLENS MODULATED ACOUSTIC WAVES IN ACOUSTIC-ELASTIC MEDIUM

Bui Xuan Kien, Dinh Van Chau, Nguyen Van Thinh — Thu, 16 Jan 2025 00:00:00 +0700

In some recent studies, the microlens 2D array modulated by acoustic wave is firstly proposed and the capability to use it to design optical tweezers 2D array theoretically investigated, i.e., the dependence of its focal length and its numerical aperture on the thickness of the acoustic-elastic medium (AEM) is discussed. In this paper, the conditions for microparticle trapping as the maximum gradient force larger than the necessary force (> 0.01pN) and radius of trapping region satisfied the diffractive limit (R_trap>l), are discussed to find out the suitable collection of parameters.

STUDY ON THE EFFECTS OF KClO3 ON THE CAPABILITY OF FLOWERING AND FRUIT-BEARING OF THE EARLY RIPENING LONGAN VARIETY THAI BINH, YEN SON DISTRICT, TUYEN QUANG PROVINCE

Hoang Thi Thu Hoan, Vi Xuan Hoc — Thu, 16 Jan 2025 00:00:00 +0700

The experiment was conducted on the early ripening longan variety Thai Binh in Yen Son district, Tuyen Quang province during the period from October 2023 to May 2024 by mixing KClO3 with plain water at doses of 10, 20 and 30 grams/day. 1 m2 watered the soil around the longan canopy. Monitoring results showed that the experimental longan trees treated with KClO3 flowered and fruited, with a dose of 30 grams/1m2 of canopy having the highest rate of flowering branches, fruiting rate and yield. KClO3 treatment for early-ripening longan varieties in Thai Binh commune has resulted in harvests 45 - 60 days earlier than main crop varieties, yield reaching 22.9 - 33.9 kg/tree, economic efficiency reaching 843,400 - 1,313,400 VND/tree, each hectare gives profit from 177,114,000 - 275,814,000 VND. Meanwhile, in the main season, each longan tree only gives a profit of 201,000 VND/tree and one hectare gives an average profit of 42,210,000 VND.