bluuebunny/crossref_metadata_2025 huggingface dataset:
Osmotic Cloud-Edge Intelligence for IoT-Based Cyber-Physical Systems
Authors: Loseto Giuseppe , Scioscia Floriano , Ruta Michele , Gramegna Filippo , Ieva Saverio , Fasciano Corrado , Bilenchi Ivano , Loconte Davide
Published: March 2022

Artificial Intelligence (AI) in Cyber-Physical Systems allows machine learning inference on acquired data with ever greater accuracy, thanks to models trained with massive amounts of information generated by Internet of Things devices. Edge Intelligence is increasingly adopted to execute inference on data at the border of local networks, exploiting models trained in the Cloud. However, the training tasks on Edge nodes are not supported yet with flexible dynamic migration between Edge and Cloud. This paper proposes a Cloud-Edge AI microservice architecture, based on Osmotic Computing principles. Notable features include: (i) containerized architecture enabling training and inference on the Edge, Cloud, or both, exploiting computational resources opportunistically to reach the best prediction accuracy; and (ii) microservice encapsulation of each architectural module, allowing a direct mapping with Commercial-Off-The-Shelf (COTS) components. Grounding on the proposed architecture: (i) a prototype has been realized with commodity hardware leveraging open-source software technologies; and (ii) it has been then used in a small-scale intelligent manufacturing case study, carrying out experiments. The obtained results validate the feasibility and key benefits of the approach.
Analytical and Experimental Performance Analysis of Enhanced Wake-Up Receivers Based on Low-Power Base-Band Amplifiers
Authors: Schott Lydia , Fromm Robert , Bouattour Ghada , Kanoun Olfa , Derbel Faouzi
Published: March 2022

With the introduction of Internet of Things (IoT) technology in several sectors, wireless, reliable, and energy-saving communication in distributed sensor networks are more important than ever. Thereby, wake-up technologies are becoming increasingly important as they significantly contribute to reducing the energy consumption of wireless sensor nodes. In an indoor environment, the use of wireless sensors, in general, is more challenging due to signal fading and reflections and needs, therefore, to be critically investigated. This paper discusses the performance analysis of wake-up receiver (WuRx) architectures based on two low frequency (LF) amplifier approaches with regard to sensitivity, power consumption, and package error rate (PER). Factors that affect systems were compared and analyzed by analytical modeling, simulation results, and experimental studies with both architectures. The developed WuRx operates in the 868 MHz band using on-off-keying (OOK) signals while supporting address detection to wake up only the targeted network node. By using an indoor setup, the signal strength and PER of received signal strength indicator (RSSI) in different rooms and distances were determined to build a wireless sensor network. The results show a wake-up packets (WuPts) detection probability of about 90% for an interior distance of up to 34 m.
A Reliable Method of Measuring the Conversion Degrees of Methacrylate Dental Resins
Authors: Kwaśny Mirosław , Bombalska Aneta , Obroniecka Karolina
Published: March 2022

The main aim of the study was to implement the most reliable method of measuring the degrees of conversion during photopolymerization of dental fillings. Contrary to the methods used so far, the method is based only on comparison with the monomer absorbance spectrum without reference bands. Another aim of the study was to prepare a comparative analysis of the polymerization kinetics of dental resins under various light sources and different environmental conditions (irradiance, light dose, temperature), with estimation of the degrees of conversion (DC) of the resins being the main metric. HRi Universal Enamel (UE2) and HRi Universal Dentine (UD2) were examined under two different types of light sources used in dentistry, LED and halogen. DC was measured by Fourier transform infrared spectroscopy (FTIR) in transmission mode from 5 s up to 7 days. Spectra were recorded from the parallel optical layers of samples that were placed between the KBr crystals. The results are expressed by the changes in the absorbance spectrum during the polymerization and the calculated conversion rates. The results of each experiment were averaged from three separate measurements of three samples, during which the samples were illuminated under identical conditions. The data were analyzed by performing ANOVA test comparisons between sample groups at the significance level α = 0.05. The degree of conversion of the UD2 resin was higher than that of UE2 for each experimental condition, but there was no statistically significant difference between the DC of those materials (p > 0.05). There was statistically significant difference (p < 0.01) in the DC caused by LED and halogen light sources producing the same light doses (38 J/cm2). This was the result of different features of light transmission to the filler in the resin composite. The efficacy of the LED source is twice as high as that of the halogen light source. Maximal DC without any other differences in conditions, such as resin type or light source, reached around 70% for temperatures of 22–37 °C. For 37 °C, this took 24 h, which is a contrast to the 7 days it took for 23 °C. The influences of different conditions and factors on reaction kinetics are only strong in the early and the rapid stage of conversion. The optimal time of irradiance using either light source is 20 s for a monolayer, and its thickness should not exceed 2 mm.
Reinforcement Learning-Based Adaptive Streaming Scheme with Edge Computing Assistance
Authors: Kim Minsu , Chung Kwangsue
Published: March 2022

Dynamic Adaptive Streaming over HTTP (DASH) is a promising scheme for improving the Quality of Experience (QoE) of users in video streaming. However, the existing schemes do not perform coordination among clients and depend on fixed heuristics. In this paper, we propose an adaptive streaming scheme with reinforcement learning in edge computing environments. The proposed scheme improves the overall QoE of clients and QoE fairness among clients based on a state-of-the-art reinforcement learning algorithm. Edge computing assistance plays a role in providing client-side observations to the mobile edge, making agents utilize this information when generating a policy for multi-client adaptive streaming. We evaluated the proposed scheme through simulation-based experiments under various network conditions. The experimental results show that the proposed scheme achieves better performance than the existing schemes.
Fuzzy Gain-Scheduling PID for UAV Position and Altitude Controllers
Authors: Melo Aurelio G. , Andrade Fabio A. A. , Guedes Ihannah P. , Carvalho Guilherme F. , Zachi Alessandro R. L. , Pinto Milena F.
Published: March 2022

Unmanned aerial vehicle (UAV) applications have evolved to a wide range of fields in the last decade. One of the main challenges in autonomous tasks is the UAV stability during maneuvers. Thus, attitude and position control play a crucial role in stabilizing the vehicle in the desired orientation and path. Many control techniques have been developed for this. However, proportional integral derivative (PID) controllers are often used due their structure and efficiency. Despite PID’s good performance, different requirements may be present at different mission stages. The main contribution of this research work is the development of a novel strategy based on a fuzzy-gain scheduling mechanism to adjust the PID controller to stabilize both position and altitude. This control strategy must be effective, simple, and robust to uncertainties and external disturbances. The Robot Operating System (ROS) integrates the proposed system and the flight control unit. The obtained results showed that the proposed approach was successfully applied to the trajectory tracking and revealed a good performance compared to conventional PID and in the presence of noises. In the tests, the position controller was only affected when the altitude error was higher, with an error of 2% lower.
Improved MQTT Secure Transmission Flags in Smart Homes
Authors: Munshi Asmaa
Published: March 2022

In the current era of smart homes and smart grids, complex technical systems that allow for the automation of domestic functions are rapidly growing and becoming more widely available. A wide range of technologies and software applications are now available for use in smart homes, and many of them are free to use. They allow for communication between home appliances and their users, as well as the automation, monitoring, and remote-control capabilities of home appliances themselves. Unfortunately, a lot of previous research ignored security issues involving the great attention to detail of the data in a transmission session within the devices in smart home architectures, which is why this study proposed smart grid secured transmission flags suitable for preventing every bit of data transmission in a smart home. Secure Message Queueing Transport Protocol (MQTT) in Internet of Things (IoT) Smart Homes protocols was utilized; an experimental testbed was designed with a prototype involving the process of a smart home system and the sequences of the data transmission. The evaluation of the proposed strategies has shown an improved bi-directional secure resource constraint strategy for the smart home within data packet transmission at 70 to 80 mbps over secure MQTT. A number of concerns, including technological barriers, difficulties, challenges, and future trends, as well as the role of users, have been presented in this study, among others.
Predictive Fault Diagnosis for Ship Photovoltaic Modules Systems Applications
Authors: García Emilio , Quiles Eduardo , Zotovic-Stanisic Ranko , Gutiérrez Santiago C.
Published: March 2022

In this paper, an application for the management and supervision by predictive fault diagnosis (PFD) of solar power generation systems is developed through a National Marine Electronics Association (NMEA) 2000 smart sensor network. Here, the NMEA 2000 network sensor devices for measuring and supervising the parameters inherent to solar power generation and renewable energy supply are applied. The importance of renewable power generation systems in ships is discussed, as well as the causes of photovoltaic modules (PVMs) aging due to superimposed causes of degradation, which is a natural and inexorable phenomenon that affects photovoltaic installations in a special way. In ships, PVMs are doubly exposed to inclement weather (solar radiation, cold, rain, dust, humidity, snow, wind, electrical storms, etc.), pollution, and a particularly aggressive environment in terms of corrosion. PFD techniques for the real-world installation and safe navigation of PVMs are discussed. A specific method based on the online analysis of the time-series data of random and seasonal I–V parameters is proposed for the comparative trend analyses of solar power generation. The objective is to apply PFD using as predictor symptom parameter (PS) the generated power decrease in affected PVMs. This PFD method allows early fault detection and isolation, whose appearance precedes by an adequate margin of maneuver, from the point of view of maintenance tasks applications. This early detection can stop the cumulative degradation phenomenon that causes the development of the most frequent and dangerous failure modes of solar modules, such as hot-spots. It is concluded that these failure modes can be conveniently diagnosed by performing comparative trend analyses of the measured power parameters by NMEA sensors.
Combined Use of Cointegration Analysis and Robust Outlier Statistics to Improve Damage Detection in Real-World Structures
Authors: Turrisi Simone , Zappa Emanuele , Cigada Alfredo
Published: March 2022

Due to the need for controlling many ageing and complex structures, structural health monitoring (SHM) has become increasingly common over the past few decades. However, one of the main limitations for the implementation of continuous monitoring systems in real-world structures is the effect that benign influences, such as environmental and operational variations (EOVs), have on damage sensitive features. These fluctuations may mask malign changes caused by structural damages, resulting in false structural condition assessment. When damage identification is implemented as novelty detection due to the lack of known damage states, outliers may be part of the data set as the result of the benign and malign factors mentioned above. Thanks to the developments in the field of robust outlier detection, the current paper presents a new data fusion method based on the use of cointegration and minimum covariance determinant estimator (MCD), which allows us to visualize and to classify outliers in SHM data, depending on their origin. To validate the effectiveness of this technique, the recent case study of the KW51 bridge has been considered, whose natural frequencies are subjected to variations due to both EOVs and a real structural change.
Chemical Spill Encircling Using a Quadrotor and Autonomous Surface Vehicles: A Distributed Cooperative Approach
Authors: Jacinto Marcelo , Cunha Rita , Pascoal António
Published: March 2022

This article addresses the problem of formation control of a quadrotor and one (or more) marine vehicles operating at the surface of the water with the end goal of encircling the boundary of a chemical spill, enabling such vehicles to carry and release chemical dispersants used during ocean cleanup missions to break up oil molecules. Firstly, the mathematical models of the Medusa class of marine robots and quadrotor aircrafts are introduced, followed by the design of single vehicle motion controllers that allow these vehicles to follow a parameterised path individually using Lyapunov-based techniques. At a second stage, a distributed controller using event-triggered communications is introduced, enabling the vehicles to perform cooperative path following missions according to a pre-defined geometric formation. In the next step, a real-time path planning algorithm is developed that makes use of a camera sensor, installed on-board the quadrotor. This sensor enables the detection in the image of which pixels encode parts of a chemical spill boundary and use them to generate and update, in real time, a set of smooth B-spline-based paths for all the vehicles to follow cooperatively. The performance of the complete system is evaluated by resorting to 3-D simulation software, making it possible to visually simulate a chemical spill. Results from real water trials are also provided for parts of the system, where two Medusa vehicles are required to perform a static lawn-mowing path following mission cooperatively at the surface of the water.
Two-Stage Multiarmed Bandit for Reconfigurable Intelligent Surface Aided Millimeter Wave Communications
Authors: Mohamed Ehab Mahmoud , Hashima Sherief , Hatano Kohei , Aldossari Saud Alhajaj
Published: March 2022

A reconfigurable intelligent surface (RIS) is a promising technology that can extend short-range millimeter wave (mmWave) communications coverage. However, phase shifts (PSs) of both mmWave transmitter (TX) and RIS antenna elements need to be optimally adjusted to effectively cover a mmWave user. This paper proposes codebook-based phase shifters for mmWave TX and RIS to overcome the difficulty of estimating their mmWave channel state information (CSI). Moreover, to adjust the PSs of both, an online learning approach in the form of a multiarmed bandit (MAB) game is suggested, where a nested two-stage stochastic MAB strategy is proposed. In the proposed strategy, the PS vector of the mmWave TX is adjusted in the first MAB stage. Based on it, the PS vector of the RIS is calibrated in the second stage and vice versa over the time horizon. Hence, we leverage and implement two standard MAB algorithms, namely Thompson sampling (TS) and upper confidence bound (UCB). Simulation results confirm the superior performance of the proposed nested two-stage MAB strategy; in particular, the nested two-stage TS nearly matches the optimal performance.
Disinformation in Social Networks and Bots: Simulated Scenarios of Its Spread from System Dynamics
Authors: Guzmán Rincón Alfredo , Carrillo Barbosa Ruby Lorena , Segovia-García Nuria , Africano Franco David Ricardo
Published: March 2022

Social networks have become the scenario with the greatest potential for the circulation of disinformation, hence there is a growing interest in understanding how this type of information is spread, especially in relation to the mechanisms used by disinformation agents such as bots and trolls, among others. In this scenario, the potential of bots to facilitate the spread of disinformation is recognised, however, the analysis of how they do this is still in its initial stages. Taking into consideration what was previously stated, this paper aimed to model and simulate scenarios of disinformation propagation in social networks caused by bots based on the dynamics of this mechanism documented in the literature. For achieving the purpose, System dynamics was used as the main modelling technique. The results present a mathematical model, as far as disinformation by this mechanism is concerned, and the simulations carried out against the increase in the rate of activation and deactivation of bots. Thus, the preponderant role of social networks in controlling disinformation through this mechanism, and the potential of bots to affect citizens, is recognised.
Recurrent Cerebral Artery Dissection Associated with Seronegative Antiphospholipid Antibody Syndrome
Authors: Kim Hee Sue , Lee Eun Su , Shin Byoung-Soo , Kang Hyun Goo
Published: March 2022

Stroke in young patients requires thorough evaluation as they often lack risk factors. Antiphospholipid syndrome can cause arterial thrombosis and pregnancy loss; hence, differential diagnoses should include seronegative antiphospholipid syndrome. We report a case of recurrent ischemic stroke caused by recurrent dissection in a patient with a history of pregnancy loss. A 33-year-old woman was admitted with global aphasia and right hemiparesis. During intra-arterial thrombectomy, a left middle cerebral artery dissection was detected. After 5.5 years, she was re-admitted for dysarthria, left facial palsy, subtle left hemiparesis, and right middle cerebral artery dissection. She tested negative for autoimmune diseases and vasculitis. However, underlying pathologic conditions could not be excluded because of the unique disease course. Finally, she was diagnosed with seronegative antiphospholipid syndrome. The concept of seronegative antiphospholipid syndrome has been proposed for patients with clinical features suggestive of antiphospholipid syndrome but with negative titers. However, this syndrome can only be diagnosed by exclusion. Furthermore, arterial dissection should be considered to be its main pathology. Antiphospholipid syndrome itself can be a risk factor for arterial dissection because it weakens the vessel walls. Therefore, diagnosis is important to prevent future complications in young patients with recurrent cerebral artery dissection, especially those associated with pregnancy-related morbidities.
ASPEK HUKUM TINDAK PIDANA PENYIMPANAN/ BARANG KEBUTUHAN POKOK DAN BARANG PENTING
Authors: I Abdi , Fadillah Syarif , Mamang Damrah
Published: March 2022

Abdi 2017, Review Of The Criminal Law On The Storage Of Basic Goods and Essential Goods.The crime of storing basic goods is a form of economic crime that occurs in the community but is rarely touched by law enforcement. Storage activities are carried out at a time when the food sector in Indonesia is experiencing a crisis of food sources caused by overexploitation or poor natural conditions. As a result, inflation is out of control. The question is how is the analysis of criminal law in Indonesia in storing basic goods and essential goods? And what is the form of criminal responsibility for the storage of basic goods and essential goods? In the discussion of this thesis, the method used is a juridical normative research method using the conseptual apparach approach. Criminal liability of criminal perpetrators of the crime of storing basic goods and essential goods and accounted for to people or corporations as legal subjects. Because those who can make mistakes are people as well as corporations. This person or corporation is also included in the investigation of business actors in the Trade Act so that they can be held accountable for criminal acts. The criminal arrangement of the criminal act of storing basic and essential goods is regulated in Law No. 7 of 2014 on trade in law No. 18 of 2012 on food and Presidential Regulation No. 71 of 2015 on the storage of basic goods and essential goods and related laws and regulations related to others.
PERLINDUNGAN HUKUM KONSUMEN TERHADAP PEREDARAN PRODUK VAKSIN PALSU
Authors: Astuti Tri , Lubis Efridani , Zakky As Mohammad
Published: March 2022

In the Law 1945 the Unitary State of the Republic of Indonesia article 1 paragraph (3) affirmed that the State of Indonesia is a state of law. In addition, in the General Explanation of the 1945 Constitution on The System of State Government, it is explained that: Indonesia is a country based on law (Rechstaat) is not based on mere power (Machstaat). Laws are formulated to regulate and protect the interests of the community and to protect human rights. The need for law to provide Indonesian Consumer Protection is inevitable, in line with one of our national development goals, namely protecting the Indonesian nation and all Indonesian blood (the opening of the 1945 Constitution paragraph IV). In this study, the author focused on the formulation of the problem "How is the legal protection of consumers against the circulation of counterfeit vaccine products?". This research aims to find out the legal protection of consumers against the circulation of counterfeit vaccine products. While this research method is Normative Juridical. Referring to the formulation of the issue regarding the protection of consumer law against the circulation of counterfeit vaccine products, the Author concluded that the regulation of the circulation of vaccine products according to the consumer protection law is Consumer Protection regulated in Law No. 8 of 1999 the understanding of consumer legal protection is all legal certainty to provide protection to consumers.Supervision of the Food and Drug Administration (BPOM) in the circulation of vaccines is one of the biological products categorized as high risk products, so it requires special consideration and attention and stricter supervision than drug products in general. Legal settlement efforts on fake vaccines are carried out in two ways, namely through the general judiciary and outside the court.
PENEGAKAN HUKUM TERHADAP PENGEDARAN OBAT-OBATAN YANG TIDAK MEMILIKI IZIN EDAR PADA MASA PANDEMI COVID 19
Authors: Hadimulya Tantra , Lubis Efridani , Fahruddin Muhammad
Published: March 2022

Lina Marlena, 1220160040, Law Enforcement Against Circulation Of Drugs That Do Not Have ACirculation Permit During The Covid 19 Pandemic. Faculty of Law, Universitas Islam Assyafi’iyah, 2020. The purpose of this study is to determine law enforcement efforts without adistribution permit during the Covid 19 pandemic. This research uses a juridical-empirical researchmethod, a problem approach based on applicable laws and regulations, then touches on legalprinciples and facts of events. that happens on the field. The results of the study can be concludedthat someone can be said to have carried out the act of circulating illegal drugs if they violate articles196-197 of Law No. 36 of 2009 concerning Health. Meanwhile, corporations that carry out illegal drug distribution are charged under Article 201 of the Health Law and also for law enforcement, forperpetrators who have circulated illegal drugs, there are several sanctions, namely for criminal sanctions the perpetrator can be subjected to articles in accordance with the health law. , and forcivil sanctions the perpetrator is responsible for providing compensation for damages or losses to consumers as a result of consuming goods, and finally administrative sanctions in the form of verbal warnings, revocation of business licenses, and imposition of disciplinary penalties based onprevailing laws and regulations.
Exploring the value of adverse life experiences of social service and support workers
Authors:   , Mackinnon Fiona
Published: March 2022

Social services provide support to benefit the community, collectively they are an intrinsic part of our culture. Numerous international studies have suggested that persons in helping professions such as health and social services have had more adverse experiences than the general population and that these experiences may have in part formed their vocational motivation. This is an area of little research in Aotearoa that I believed worthy of exploration given that I have worked in the sector for decades and had anecdotally identified a reoccurring theme amongst my colleagues and myself of adverse life experiences contributing to our vocational motivation. The questions that guided this research inquiry were: To what extent are adverse life experiences perceived as an underlying motivator for the vocational choices of social service and support workers? To what extent are adverse life experiences perceived as contributing to advantageous attributes in social service and support workers? To what extent do social service and support workers perceive stigma and professional vulnerability exist as barriers to identifying adverse life experiences in the workplace? The study was undertaken using a convergent parallel mixed method design. Mixed methods studies are often seen in health and social care research, as both quantitative and qualitative methods are thought to have complementary strengths when undertaken simultaneously, providing deeper insight into the experiences of research participants than either approach alone. Convergent design required both quantitative and qualitative elements to be analysed independently and then interpreted together, this layered approach further supported understanding the experiences of participants. For the most part respondents commented in the first person when referring to adverse life experiences, suggesting a high incidence of adverse life experiences amongst respondents. Adverse life experiences were considered as influencing vocational choice by numerous respondents; however, it was clear barriers exist to identifying as having had adverse life experiences in the professional context due to fear of stigma and discrimination. Findings suggested there are issues relating to the collective understanding of what ‘recovery’ is that has implications for lived experience workers and those who identified as having had adverse life experiences. I have recommended that further research is indicated as a means to advance understanding and acceptance of the relationship between adverse life experiences, post traumatic growth and helping professions in the cultural context of Aotearoa and our known societal issues. The process of practitioner inquiry I believe has advanced my capacity to continue to evolve and develop and remain relevant to the sector and environments I work in. I envisage the enquiry process as having provided an enduring foundation to foster my growth and development on a continuum.
Seeking safe harbour: Water immersion for women with complex pregnancy
Authors:   , Kara Kelly
Published: March 2022

Background: Water immersion is used by women, particularly within midwifery-led settings, as a strategy to manage the sensations of labour. Low-risk women who have used water immersion in labour express feelings of increased relaxation, support and control in their labour and birth experience. Being labelled ‘high risk’ can significantly impact both a woman’s experience of her pregnancy and her opportunity for experiencing a physiological birth. Women with complex pregnancies have reported an increase in anxiety and a feeling that their normal childbearing journey has been interrupted and subsumed by medical monitoring and risk management. Midwifery frameworks in Aotearoa New Zealand protect and promote the woman’s role as a decision maker within her experience and her right to make informed decisions about her care. Aims: The aim of this research was to develop an understanding of the influences, facilitators and barriers for women who chose to use water immersion for labour and birth, in a hospital setting, when they were labelled/identified as being clinically complex, as well as to explore their experience of using water immersion in labour. Methods: A qualitative descriptive inquiry, using semi-structured interviews was undertaken to explore seven women's experiences of using water immersion during their labour and/or birth after having a complex pregnancy. Inductive thematic analysis was used to analyse participant data. Findings: Thematic analysis identified four themes within the women’s experiences. Women use water immersion to resist the medicalisation of their birthing experience and protect themselves from the iatrogenic risks of birthing within a hospital setting. The desire to use water immersion is often driven by dissatisfaction with previous medicalised experiences of birth and the women’s desire to avoid repeating these experiences. Water provides a safe and protected space to labour which supports a sense of control and privacy. The LMC midwife is a vital ally and advocate in negotiating to use water immersion within the hospital setting. In this environment, staff can either facilitate or be barriers to using water immersion in labour with a complex pregnancy. Conclusions: Women use water immersion in labour to optimise their opportunity for physiological birthing, often in response to previous medicalised births. Water immersion is experienced positively as a strategy to manage labour. Individualised holistic midwifery care from a Lead Maternity Care midwife was valued by the women and viewed as a key support in negotiating for the choice of water immersion. Women needed to purposefully seek a midwife who was willing to support them in their choice to use water immersion.
MỘT SỐ ĐẶC ĐIỂM ỐNG TIÊU HÓA VÀ CHỈ SỐ SINH TRẮC RUỘT CỦA LOÀI Butis butis (HAMILTON, 1822)
Authors: Thảo Nguyễn Hoàng Phương , Quang Đinh Minh
Published: March 2022

Nghiên cứu đã cung cấp một số đặc điểm về ống tiêu hóa và sự biến động của chỉ số sinh trắc ruột (RGL) theo giới tính, mùa vụ và địa điểm của loài cá Butis butis (Hamilton, 1822). Qua phân tích 715 mẫu cá (412 đực và 303 cái) thu được tại 4 địa điểm gồm: Duyên Hải - Trà Vinh (TV), Trần Đề - Sóc Trăng (ST), Hòa Bình - Bạc Liêu (BL) và Đầm Dơi - Cà Mau (CM) cho thấy, B. butis có miệng dưới hàm có hai hàng răng, răng hàm ngoài lớn hơn răng hàm trong. Chỉ số sinh trắc ruột (RGL=0,48±0,01 SE) của loài cá này nhỏ hơn 1 (t-test, t=-0,52; p<0,001). Những điều này chứng tỏ loài cá B. butis thuộc nhóm cá ăn động vật. Giá trị RGL của cá đực (0,46±0,01 SE) nhỏ hơn cá cái (0,50±0,01 SE; t=6,46; p<0,001), nhưng giá trị này ở mùa khô (0,49±0,01 SE) tương đương ở mùa mưa (0,48±0,01 SE; t=0,43; p=0,67). RGL biến động theo điểm thu mẫu và đạt giá trị cao nhất tại CM (0,50±0,01 SE) và thấp nhất BL (0,47±0,01 SE) và ST (0,48±0,01 SE) (1-way ANOVA; F=3,70; p=0,01). RGL cũng thay đổi theo tháng thu mẫu (F=3,04; p=0,01) và sự tương tác giới tính × mùa vụ (2-way ANOVA; F=12,95, p<0,001) và mùa vụ × địa điểm thu mẫu (F=3,28; p=0,02). Kết quả đã bổ sung thêm thông tin về đặc điểm dinh dưỡng của loài cá B. butis.
NGHIÊN CỨU THÀNH PHẦN HÓA HỌC VÀ HOẠT TÍNH SINH HỌC CỦA CAO CHIẾT LOÀI WEIGELA X “BRISTOL RUBY”
Authors: Hùng Nguyễn Đức , Dung Lê Phương
Published: March 2022

Trong nghiên cứu này, cao chiết ethanol từ phần rễ của loài W. x “Bristol ruby” đã được định tính thành phần hóa học và đánh giá hoạt tính sinh học. Kết quả định tính cho thấy, sự có mặt của flavonoid, terpenoid, coumarin và saponin triterpene, nhưng không có alkaloid, steroid và glycoside tim. Cao chiết ethanol từ phần rễ của loài W. x “Bristol ruby” có hoạt tính kháng oxy hóa với giá trị EC50 là 71,94 µg/mL. Hoạt tính gây độc trên dòng tế bào ung thư đại trực tràng CT26 cho thấy cao chiết ethanol từ phần rễ của loài W. x “Bristol ruby” có hoạt tính ức chế tế bào ung thư với giá trị IC50 là 11,83 µg/mL khi so sánh với đối chứng dương 5-Fluorouracil với giá trị IC50 là 36,76 µg/mL. Nghiên cứu đề xuất sự cần thiết tiếp tục tiến hành phân lập các hợp chất tinh sạch có trong cao chiết ethanol từ phần rễ của loài W. x “Bristol ruby” và đánh giá hoạt tính sinh học của các hợp chất này.
CHỈNH ĐỊNH BỘ ĐIỀU KHIỂN PID BẰNG HỆ MỜ ÁP DỤNG CHO ROBOT DELTA BA BẬC TỰ DO
Authors: Thành Lê Minh , Thắng Nguyễn Chiến , Ngôn Nguyễn Chí
Published: March 2022

Robot Delta ba bậc tự do là loại robot song song có phạm vi sử dụng khá rộng trong các ngành công nghiệp như in 3D, robot hàn, robot gấp thuốc trong các nhà máy sản xuất thuốc tây,… Vì vậy, để điều khiển bám quỹ đạo của robot Delta có rất nhiều phương pháp điều khiển, trong đó bộ điều khiển PID là một chọn lựa phù hợp cho điều khiển robot Delta vì chi phí thiết kế và thực nghiệm thấp. Tuy nhiên, các tham số của cánh tay như trọng lượng, khớp và ma sát có thể thay đổi và ảnh hưởng đến hoạt động của cả hệ, mà ở đó bộ điều khiển PID không còn duy trì điều khiển bám theo quỹ đạo. Vì vậy, bài báo này đưa ra phân tích, so sánh và đánh giá giải thuật điều khiển tự chỉnh định FUZZY-PID cho bộ điều khiển PID kinh điển để có được hiệu suất tốt hơn của hệ điều khiển vòng kín. Các kết quả mô phỏng trên MATLAB/Simulink chứng minh hiệu quả của giải thuật điều khiển với thời gian xác lập 0,658 (s) và độ quá điều chỉnh nhỏ 3,75 %.
CƯỜNG ĐỘ HUỲNH QUANG CỦA CHẤM LƯỢNG TỬ CdTe PHÁT XẠ ĐỎ TĂNG BẤT THƯỜNG BỞI ION Cu2+
Authors: Bắc Hoàng Quang , Đức Vũ Anh , Nhàn Nguyễn Thị , Hảo Nguyễn Văn , Quang Nguyễn Văn , Dũng Mai Xuân
Published: March 2022

Sự phụ thuộc của hoạt tính hóa học theo kích thước của chấm lượng tử bán dẫn (QDs) có vai trò quan trọng trong triển khai ứng dụng QDs vào các lĩnh vực như quang xúc tác, cảm biến hóa học và tổng hợp QDs. Trong bài báo này, chúng tôi nghiên cứu ảnh hưởng của ion Cu2+ đến tính chất hấp thụ và phát xạ huỳnh quang (PL) của chấm lượng tử CdTe tan trong nước để làm sáng tỏ tiềm năng ứng dụng của CLT CdTe làm cảm biến huỳnh quang phát hiện ion Cu2+. Nằm ngoài dự đoán ban đầu, trong khi CLT nhỏ, phát xạ màu xanh lá cây hoặc phát xạ màu vàng cường độ PL không thay đổi khi tăng nồng độ của Cu2+ từ 10-8 M lên 10-5 M, cường độ PL của CLT CdTe phát xạ đỏ tăng lên khoảng 3,3 lần. Ở vùng nồng độ Cu2+ lớn hơn, cường độ PL của CLT nhỏ giảm dần, trong khi PL của CLT lớn không thay đổi đáng kể. Kết quả này gợi ý việc sử dụng CLT CdTe với kích thước phù hợp để phát hiện ion Cu2+ trong nước.
MÔ PHỎNG CẢI TIẾN KÊNH VI LƯU ỨNG DỤNG PHÂN TÁCH TẾ BÀO UNG THƯ TỪ DÒNG MÁU SỬ DỤNG PHƯƠNG PHÁP BẤT ĐIỆN DI
Authors: Việt Nguyễn Ngọc
Published: March 2022

Phát hiện các tế bào ung thư tuần hoàn (CTCs) đã nổi lên như một giải pháp hấp dẫn trong nhận diện sớm ung thư. Thông thường, các tế bào CTCs, cũng như các tế bào ung thư khác có kích thước lớn hơn các tế bào bình thường. Nghiên cứu này trình bày các khảo sát số của một kênh vi lưu liên tục kết hợp phương pháp bất điện di (DEP) trong việc phân tách CTCs. Các điều kiện thích hợp của điện trường kích thích và lưu lượng dòng chảy trong vi kênh đã được áp dụng để cách ly hiệu quả các tế bào CTCs khỏi các tế bào bình thường trong mẫu máu. Hiệu suất của quá trình phân tách CTCs được đánh giá thông qua quan sát các quỹ đạo dịch chuyển tế bào. Một số thiết kế vi kênh cũng được xem xét để tìm kiếm cấu hình tối ưu. Các kết quả đã chứng tỏ rằng, các tế bào CTCs có thể phân tách khỏi các tế bào máu thường (gồm WBCs, RBCs, PLTs) với các hệ số thu hồi và tính tinh khiết xuất sắc tại một kênh có độ cao phù hợp và một lưu lượng dòng vận chuyển tế bào máu lên tới 10 µL/min. Nghiên cứu có thể cung cấp những hiểu biết giá trị cho thiết kế các thiết bị vi lưu để bắt các tế bào ung thư trong các ứng dụng y sinh khác nhau.
DỰ BÁO SẢN LƯỢNG ĐIỆN TỈNH BẠC LIÊU DÙNG MẠNG HỌC SÂU
Authors: Ngôn Nguyễn Chí , Thảo Trần Văn , Vinh Nguyễn Xuân
Published: March 2022

Quy hoạch hệ thống điện là một yêu cầu quan trọng trong việc chủ động xây dựng và phát triển cơ sở hạ tầng ngành điện. Nó vừa giúp đáp ứng tốt hơn yêu cầu ngày càng cao của khách hàng, nhất là yêu cầu phát triển công nghiệp, vừa mang lại lợi ích trong kinh doanh, truyền tải, phân phối và cung cấp điện. Công cụ dự báo các chỉ số điện năng đóng vai trò quan trọng, quyết định cho công tác quy hoạch khả thi và bám sát thực tiễn phát triển của xã hội. Nghiên cứu này nhằm đề xuất một giải pháp ứng dụng mạng học sâu LSTM (long short-term memory) để dự báo sản lượng và doanh thu điện thương phẩm của tỉnh Bạc Liêu đến năm 2050. Mô hình dự báo này được so sánh với hàm dự báo toán học tuyến tính thường dùng và giá trị dự báo về sản lượng điện trong Đề án quy hoạch phát triển điện lực tỉnh Bạc Liêu giai đoạn 2016-2025, có xét đến 2035. Kết quả dự báo sản lượng điện của tỉnh Bạc Liêu là phù hợp với xu thế phát triển trong quá khứ của các quốc gia ở châu Âu. Ngoài ra, khả năng mở rộng ứng dụng mô hình dự báo này là hoàn toàn khả thi.
A Study on Sustainability of Corporate Social Responsibility during and Post-Covid-19
Authors: Dillip Anand M
Published: March 2022

As part of the United Nations Development Programmes, COVID-19 provides an opportunity to rethink and enhance resilience in order to accomplish long-term development goals. The industrial sector, as well as multinational corporations, should concentrate on difficulties and challenges pertaining to the welfare of society, as well as identifying the priorities of the community, which is a necessity in a pandemic situation. Companies must concentrate their efforts on corporate social responsibility programmes that are aligned with global sustainable development goals during the emergency period of the crisis. Another element is that the ecosystem, which is defined as the community of living species, has been exploited, which has had an impact on the symbiotic interaction between them. Throughout this paper, we have looked at how industries and corporations should handle their ethical, social, legal, and economic duties, as well as how these responsibilities correspond with the Constitution and the Sustainable Development Goals.
Connection between Breast Cancer and Poverty
Authors: Sangamithra A , Thilagavathy S
Published: March 2022

Poverty is associated with the higher cancer rates, cancer risk factors like tobacco used and obesity, and lack of access to cancer screening and the treatment. Breast cancer may be caused by the occurrence of malignant tumors, is one of the structures of composing the organs, which is formed due to uncontrolled reproduction of cells that went through a complex process of transformation and may evolve by direct extension or through metastatic dissemination. The main symptoms are palpable nodes and deformations especially the cambers or retractions in the breast part. Constitutional symptoms such as asthenia, fever and weight loss may also compose a clinical condition. People with lower socio economic status have high cancer deaths than those with higher socio economic status, regardless of the demographic factors which includes race/ethnicity. Only small things can be known about the breast cancer among economically disadvantaged women, except the two generally accepted facts, low income women are likely to be diagnosed more with the later stage of the disease and have higher mortality rates. Being uninsured may lead to health services, and thereby creating delays or even the absence of screening, diagnostic and also the treatment services. Lack of access may account for women diagnosed when the cancer is advanced, reducing the women’s chances of survival.
Hereditary Motor Sensory Polyneuropathy and Optic Nerve Atrophy: Case Report
Authors: Мирзоян А.Р. , Куликова С.Л. , Лихачев С.А. , Рушкевич Ю.Н. , Забродец Г.В. , Мальгина Е.В. , Голец Ю.Н.
Published: March 2022

Наследственная моторно-сенсорная полинейропатия (невральная амиотрофия Шарко – Мари – Тута, ШМТ) характеризуется аутосомно-доминантным, аутосомно-рецессивным и Х-сцепленным типами наследования, проявляется слабостью и мышечными атрофиями конечностей, снижением глубоких рефлексов, а также умеренными сенсорными нарушениями. Помимо явлений полинейропатии могут наблюдаться такие симптомы, как атрофия зрительных нервов, пигментный ретинит, глухота, атаксия, гломерулопатия, спастичность и т. д. В настоящее время не существует единой классификации заболевания, в связи с генетической гетерогенностью и клиническими особенностями каждого из типов ШМТ. В статье представлен клинический случай пациента 8 лет с ШМТ, у которого помимо прогрессирующей полинейропатии наблюдалась атрофия зрительных нервов. Причиной заболевания явилась гетерозиготная мутация в 7-м экзоне гена MFN2 (chr1:12059066G>A, rs879253777). При описании случая авторами сделан акцент на сложность дифференциальной диагностики описанного случая с хронической воспалительной демиелинизирующей полинейропатией, так как заболевание дебютировало после вирусной инфекции, отмечалось накопление контраста корешками спинного мозга по данным МРТ, имелась частичная положительная динамика в виде нарастания мышечной силы и улучшения зрения на фоне терапии кортикостероидами.

Hereditary motor sensory neuropathy (Charcot–Marie–Tooth neuropathy, CMT) is characterized by autosomal dominant, autosomal recessive, and X-linked types of inheritance, manifested by weakness and muscular atrophy of the limbs, decreased deep reflexes, and moderate sensory impairments. Additional symptoms of CMT are optic atrophy, retinitis pigmentosa, deafness, ataxia, glomerulopathy, spasticity etc. Currently, there is no single classification of CMT, because each type of CMT has got genetic heterogeneity and clinical features. The article presents a clinical case of 8-year-old patient with progressive polyneuropathy and optic nerve atrophy associated with«Неврология и нейрохирургия. Восточная Европа», 2020, том 10, № 3405Наследственная моторно-сенсорная полинейропатияи атрофия зрительных нервов: описание клинического случаяheterozygous mutation in the exon 7 of the MFN2 gene (chr1: 12059066G> A, rs879253777). The authors pointed out the difficulty of differential diagnosis of the case with chronic inflammatory demyelinating polyneuropathy, because the disease began after a viral infection, and the spinal roots accumulated the contrast on MRI. The therapy with corticosteroids gave a partial positive effect (increase of muscle strength and improvement of vision).
Use of Multiparametric MRI in Diagnostics of Clinically Significant Prostate Cancer
Authors: Кобильнык Ю.С. , Мыцик Ю.О. , Боржиевский А.Ц. , Дутка И.Ю. , Строй О.О. , Дац И.В. , Комнацька И.М. , Воробець Д.З. , Дмытрив В.Я. , Мацькевич В.Н.
Published: March 2022

Введение. Рак предстательной железы (РПЖ) – наиболее распространенная злокачественная опухоль у мужчин.Цель. Оценить диагностическую эффективность применения мультипараметрической МРТ (мпМРТ) в выявлении клинически значимого РПЖ.Материалы и методы. В исследование вошло 26 мужчин с подозрением на РПЖ. Всем па-циентам проводилось комплексное клиническое обследование, которое включало мпМРТ. Оценка полученных изображений МРТ осуществлялась по системе PI-RADS.Результаты. Распределение пациентов в зависимости от оценки по системе PI-RADS было следующим: 1 балл – 2 (7,69%) пациента, 2 балла – 5 (19,23%) пациентов, 3 балла – 8 (30,77%)пациентов, 4 балла – 6 (23,08%) пациентов и 5 баллов – 5 (19,23%) человек. В подгруппе пациентов с оценкой 5 клинически значимый РПЖ был обнаружен в 100% случаев. В подгруппе с оценкой новообразования 4 клинически значимый РПЖ был диагностирован в 5 (83,33%) случаях, а у 1 (16,67%) пациента – клинически незначимый вариант опухоли. В подгруппе па-циентов с 3 баллами клинически значимый РПЖ был диагностирован в 4 (66,67%) случаях, у 1 (16,67%) пациента – клинически незначимый вариант новообразования и у 1 (16,67%) пациента – доброкачественная гиперплазия простаты.Выводы. Применение мпМРТ и системы PI-RADS версии 2 позволяло в 85,7% случаев выявлять клинически значимый вариант и избегать ненужных пункционных биопсий при отсутствии его лучевых признаков.

Introduction. Prostate cancer (PC) is the most common malignant tumor in men.Purpose. To evaluate the diagnostic effectiveness of multiparametric MRI (mpMRI) in detection of clinically significant PC.Materials and methods. The study included 26 men suspected of having PC. In all patients, a comprehensive clinical examination was performed, which included mpMRI. The evaluation of the received images was carried out in accordance with the PI-RADS system.Results. The distribution of patients according to the PI-RADS was the following: 1 point – 2 (7.69%) patients, 2 points – 5 (19.23%) patients, 3 points – 8 (30.77%) patients, 4 points – 6 (23.08%) patients and 5 points – 5 (19.23%) persons. In the subgroup of patients with 5 points, clinically significant PC was detected in 100% of cases. In the subgroup of patients with tumors of 4 points, clinically significant PC was diagnosed in 5 (83.33%) cases, and in 1 (16.67%) patient – clinically insignificant tumor. In the subgroup of patients with 3 points, clinically significant PC was diagnosed in 4 (66.67%) cases, 1 (16.67%) patient – clinically insignificant tumor, and in 1 (16.67%) patient – benign prostatic hyperplasia.Conclusion. The use of mpMRT and PI-RADS version 2 allowed to detect a clinically significant PC in 85.7% of cases and to avoid unnecessary puncture biopsies.
Results of Local Intraperitoneal Chemotherapy in Resectable Gastric Cancer of the Stage IIA–IIIC
Authors: Ревтович М.Ю.
Published: March 2022

Цель исследования. Повысить эффективность радикального лечения рака желудка (РЖ) IIА–IIIC стадий путем применения локальной адъювантной интраперитонеальной химиотерапии (ИХТ).Материалы и методы. Проанализированы результаты проспективного рандомизированного исследования, включающего 157 пациентов с резектабельным раком желудка IIА–IIIC стадий (III–IV тип по Borrmann), у 67 из которых была проведена адъювантная ИХТ с применением цисплатина, депонированного на монокарбоксицеллюлозе.Результаты. Комбинация радикальной операции и локальной ИХТ позволила в сравнении с группой хирургического контроля снизить: 1) частоту прогрессирования РЖ на 23,2% (р=0,038); 2) частоту метахронной перитонеальной диссеминации на 33,1% (р<0,001); 3) 4-летнюю кумулятивную инцидентность перитонеальной диссеминации с 44,6±7,20% до 10,9±4,70% (рGray<0,001). Применение адъювантного лечения позволило увеличить показатели 4-летнейвыживаемости: 1) скорректированной с 43,9±7,6% до 67,0±7,5% (рlog-rank=0,04); 2) выживаемо-сти, свободной от диссеминации, – с 43,6±7,4% до 67,7%±7,4% (рlog-rank=0,03).Вывод. Полученные результаты подчеркивают необходимость и целесообразность применения локальной адъювантной ИХТ у пациентов, страдающих РЖ IIА–IIIC стадии, для предупреждения последующего прогрессирования опухолевого процесса, и прежде всего предотвращения развития метахронной перитонеальной диссеминации.

Purpose. To increase the effectiveness of radical treatment of the stage IIA-IIIC gastric cancer (GC) by means of administering local adjuvant peritoneal chemotherapy (IPC).Materials and methods. In the article, there are analyzed the results of prospective randomized study of 157 patients with resectable GC of the stage IIA–IIIC (types III–IV, according to the Borrmann classification); in 67 patients, there was administered the cisplatin/polymer-based adjuvant IPC.Results. The combination of radical surgery and local IPC let to reduce (1) the frequency of GC progression by 23,2% (р=0,038), (2) the frequency of peritoneal dissemination by 33,1% (р<0,001), and (3) 4-year cumulative incidence of peritoneal dissemination from 44,6±7,20% to 10,9±4,70% (рGray<0,001). As a consequence, it was possible to increase (1) 4-year adjusted survival from 43,9±7,6% to 67,0±7,5% (рlog-rank=0,04), (2) 4-year dissemination-free survival from 43,6±7,4% to67,7%±7,4% (рlog-rank=0,03).Conclusion. The study results highlight the therapeutic efficacy and the benefits of local adjuvantIPC for the stage IIA–IIIC GC patients to prevent subsequent disease recurrence, and especially the development of metachronous peritoneal metastases.