bluuebunny/crossref_metadata_2025 huggingface dataset:
A case report: Bilateral reconstruction of C2 lateral masses with expandable titanium cages following axis (C2) solitary plasmacytoma resection with 2-year follow-up
Authors: Mousavi Seyed Reza , Mohammadzadeh Sahand , Rezvani Alireza , Khalili Hoseinali , Begijonovich Mavlonov Jaloliddin , Motlagh Mohammadhadi Amirshahpari , Farrokhi Majid Reza
Published: June 2023

Background:

Solitary plasmacytoma (SP) caused the collapse/destruction of the C2 vertebral body in a 78-year-old male. To provide sufficient posterior stabilization, the patient warranted lateral mass fusion to supplement the bilateral pedicle/screw rod instrumentation.

Case Description:

A 78-year-old male presented with neck pain alone. X-rays, computed tomography, and magnetic resonance studies documented C2 vertebral collapse with the complete destruction of both lateral masses. The surgery required a laminectomy (i.e., bilateral lateral mass resection), plus placement of bilateral expandable titanium cages from C1 to C3 to supplement the screw/rod occipitocervical (O-C4) fixation. Adjuvant chemotherapy and radiotherapy were also administered. Two years later, the patient remained neurologically intact and radiographically had no evidence of tumor recurrence.

Conclusion:

In patients with vertebral plasmacytomas and bilateral lateral mass destruction, posterior occipital-cervical C4 rod/screw fusions may warrant the additional bilateral placement of titanium expandable lateral mass cages from C1 to C3.
MENTAL PERSONALITY DISORDERS: CURRENT STATE OF THE PROBLEM STATEMENT
Authors: Spytska Liana
Published: June 2023

The purpose of the research work was to determine the characteristics of external driving factors that lead to the development of destructive neoplasms in the mental activity of an individual, as well as to identify internal determinants that provoke violations in the behavioural an cognitive-emotional spheres of a person. At the same time, it became important to determine modern ways of supporting the mental health of an individual to ensure the process of restoring his social and psychological ties in society. The research paper presents data that reflect the current state of the problem of mental disorders of the personality in the global space, highlight their ethology and describe effective approaches to combating them. The obtained results of the scientific research are significant for workers in the psychological field, who implement their professional activities in psychotherapeutic practice, as well as for teachers and social organizations for a comprehensive understanding of the symptoms and course of mental disorders of the personality and directions of therapy.
Geological and geochemical characteristics of Late Ordovician volcanic levels of the Gözdağ Formation in the İstanbul-Zonguldak Tectonic Unit (NW Turkey): Implications for global events during the Ordovician
Authors: ŞEN Fatih
Published: June 2023

The İstanbul-Zonguldak Tectonic Unit is regarded as the easternmost fragment of Avalonia-Carolina and stands for Far East Avalonia. Its stratigraphy also is characterized by discontinuous sedimentation from Late Ediacaran to Late Carboniferous. In the western part of the block, known as the İstanbul Terrane, the Gözdağ Formation is represented by lagoonal sedimentary rocks consisting of shale-sandstone with limestone of Middle Ordovician-Lower Silurian age. Here, I report on stratigraphic positions and petrographical and geochemical data of fine- and coarse-grained tuffs and lavas in the Late Ordovician strata of the Gözdağ Formation. The fine- and coarse-grained tuffs have pyroclastic and the lavas have porphyritic, vitrophyric and aphanitic textures. The fine-and coarse-grained tuffs are Sandbian and Katian ages, and the lavas are Hirnantian ages, according to the stratigraphic positions of the Late Ordovician volcanic rocks. Geochemically, the-fine grained tuffs have High-K calc-alkaline character and the coarse-grained tuffs and lavas have calc-alkaline affinity. They are devoid of noticeable with-in plate components, as deduced by the presence of obvious negative Nb anomalies, and they have subduction signatures. In conjunction with the data from literature, the Sandbian fine-grained tuffs were deposited in a lagoonal depocenter in the İstanbul-Zonguldak Tectonic Unit during the Taconic orogeny formed in the earliest late Ordovician between the Piedmont Terrane and Laurentia. The Katian coarse-grained tuffs were deposited in a shallow marine in it during the last phase of the consumption of the Teisseyre-Tornquist Ocean from volcanoes occurred in volcanic arc-related settings. Besides, I the Hirnantian lavas flowed in a lagoonal depocenter in it during the soft-docking of Avalonia and Baltica, known as the pre-Caledonian orogeny.
On How Traffic Signals Impact the Fundamental Diagrams of Urban Roads
Authors: Zhang Chao , Li Yechen , Arora Neha , Osorio Carolina
Published: June 2023

Being widely adopted by the transportation and planning practitioners, the fundamental diagram (FD) is the primary tool used to relate the key macroscopic traffic variables of speed, flow, and density. We empirically analyze the relation between vehicular space-mean speeds and flows given different signal settings and postulate a parsimonious parametric function form of the traditional FD where its function parameters are explicitly modeled as a function of the signal plan factors. We validate the proposed formulation using data from signalized urban road segments in Salt Lake City, Utah, USA. The proposed formulation builds our understanding of how changes to signal settings impact the FDs, and more generally the congestion patterns, of signalized urban segments.
Prioritization of an Automated Shuttle for V2X Public Transport at a Signalized Intersection – A Real-life Demonstration
Authors: Halbach Maik , Wesemeyer Daniel , Merk Lukas , Lauermann Jan , Heß Daniel , Kaul Robert
Published: June 2023

Public transport prioritization is used at signalized intersections to reduce travel times and increase the attractiveness of public transport. In the future, analog communication technologies for public transport prioritization are soon to be replaced by the promising vehicle-to-everything (V2X) technology. This abstract presents a holistic approach using V2X communication in public transport prioritization for an automated vehicle. In order to take full advantage of the V2X technology, this means to V2X-enable the traffic infrastructure and change the way of communication as well as the traffic light control. The approach was implemented and tested under real-life conditions at the research intersection Tostmannplatz in Braunschweig.
Multi-vehicle Stochastic Fundamental Diagram Consistent with Transportations Systems Theory
Authors: Cantarella Giuio Erberto , Cipriani Ernesto , Gemma Andrea , Giannattasio Orlando , Mannini Livia
Published: June 2023

This paper describes a general approach to the specification the stable regime speed-flow function, for motorways, as a part of the stable regime Stochastic Fundamental Diagram consistent with main assumptions of Transportation Systems Theory. Main original elements are: • Specification of speed-flow functions consistent with travel time function, such as BPR-like functions; • Calibration from disaggregate data, say data from single vehicle trajectories; • Specification of the speed r. v. distribution consistent with those used in RUT for route choice behavior modelling, such as Gamma, Inv-Gamma.
Student study group break-even value and adjustment of the educational program portfolio
Authors: Azoev G. L.
Published: June 2023

The need to raising the extra-budgetary funding of the university brings to the fore the goal of increasing the admission of applicants under tuition agreements. This is not news for university employees, but, unfortunately, achieving the goal faces a number of unsolved private tasks. First of all, it is unclear what the cost of one study group should be in order to provide all the necessary conditions for the university development, including the salaries of professors and teachers at least twice the average salary of the home region. How, using the answer to this question, to manage the portfolio of educational programs and the admission campaign. The proposed answers to the questions are based on a marketing approach, which presents formulas for calculating the break-even value of a bachelor’s group, an algorithm for determining the structure of the group, recommendations for adjusting the portfolio of programs and calculating the total amount of university income from extra-budgetary admission, ensuring the planned university development.
Improving the information security sustainability of the economy financial sector
Authors: Kachurin V. V. , Akhmadeev R. G.
Published: June 2023

The legal certainty of the legislative acts in force in the Russian Federation concerning the organizational and legal basis for countering the funds laundering of criminal origin and clear regulation of the financial monitoring procedure, as well as the interaction of authorities are fundamental elements for the purpose of financial control. At the same time, countering the money laundering is a global aspect that directly affects both society and the economic system of most economically developed countries. The study analyzes the main activities of Russia Bank, aimed at ensuring the sustainability of information security in the financial sector of the economy, as well as ongoing activities aimed at limiting the spread of cybercrime based on an automated incident handling system. In order to solve strategic tasks in the financial security field of market entities, practical recommendations are proposed to improve the mechanism of countering to cyber crimes on the basis of financial monitoring of acquiring operations and corporate bank cards.
Tolerance features to uncertainty and students’ viability depending on their gender
Authors: Pelepchuk L. O. , Tsvetkova N. A.
Published: June 2023

The study subject is tolerance to uncertainty and viability. The purpose of the work is to determine their level in male and female students and identify intersex distinctions. The methodological tools were: a personality-oriented approach and a testing methods (the McLane uncertainty tolerance test modified by E.N. Osin and the human viability test by E.A. Rylskaya). The sample consisted of 70 boys and 70 girls. The following main results are noted: students have a moderate overall level of tolerance to uncertainty and viability. Boys showed higher results in tolerance to uncertainty and its general level, and girls – in viability. The obtained data are important for assessing the psychological readiness of students to adapt to situations of uncertainty and to be productive in them. The study needs to be continued on a wider sample, taking into account regional specifics. The authors concluded that the complete absence of students with a high level of viability in the sample means that the measures implemented by the institutions of family and education are insufficient.
The energy strategy of Turkey
Authors: Konovalova A. Yu.
Published: June 2023

The article is devoted to the energy strategy of Turkey, which is not fixed in legislation, but its particular elements are presented in various national strategies, development plans and programs. The author aims to identify the strengths and weaknesses of the country’s energy policy, as well as opportunities and risks using SWOT analysis. In the article, the author highlights the main elements and directions of Turkey’s energy strategy and notes that many mentioned tasks have already been achieved, that indicates a high level of the energy policy implementation. However, author believes that after 2023, when updating strategic plans, numerical indicators will undergo changes, and the general vectors of the Turkish energy sector development will remain unchanged. In addition, the article presents a general state analysis of Turkish energy sector, the main energy resources, suppliers and infrastructure.
Public transport development and changing transport behavior
Authors: Sakulyeva T. N.
Published: June 2023

The purpose of the article is to identify the tasks of developing urban transport infrastructure and changing the transport behavior of passengers. Urban transport should allow solving the following tasks: the possibility of planning the travel time, ensuring the reliability and safety of the trip, creating conditions for the availability of transport services at their cost, safety and comfort, as well as providing transport services at minimal economic costs. In the process of applying analytical research methods, actual problems of urban infrastructure have been identified and directions for solving these problems have been proposed. Human transport behavior in the conditions of rapid development of information and communication technologies has been analyzed. The growing digitalization leads to the creation of a wide variety of proposals for the implementation of mobility and its use. In addition to multimodality, this also applies to suggestions for information support and organization of systems.
Application of the customs reimport procedure in foreign trade transactions
Authors: Lysenko E. A.
Published: June 2023

The study relevance of the customs procedure of reimport consists in the absence of a unified approach to its analysis, the lack of systematization of the conditions for its application, resulting in violations of the law on the part of declarants (less than 1 % of the total number of claimed procedures). The purpose of the study is to develop a methodological approach to the economic and statistical analysis of the procedure application of reimport. The tasks that make it possible to achieve this goal were: analysis of the legal basis for the application of the customs procedure of reimport, identification of the stages of the economic and statistical analysis of the procedure implementation and the formulation of conclusions based on the results of this analysis. When solving problems, general scientific methods were used: system analysis, synthesis, comparison, modeling, as well as graphical and statistical methods. As a result of the study, a methodological approach is proposed based on the models’ presentation of placement under the reimport, depending on the previous procedures, with the identification of features and factors affecting the procedure application under study; the conditions for the application of the reimport are systematized to exclude illegal actions in the field of customs; the directions in which violations of customs legislation occur and models are developed to prevent these violations.
Base-pairing of uracil and 2,6-diaminopurine: from cocrystals to photoreactivity
Authors: Stolar Tomislav , K. D. Pearce Ben , Etter Martin , Truong Khai-Nghi , Krajnc Andraž , Mali Gregor , Rossi Barbara , Molčanov Krešimir , Lončarić Ivor , Meštrović Ernest , Užarević Krunoslav , Grisanti Luca
Published: June 2023

The information molecule of the first life on Earth is presumably ribonucleic acid (RNA). RNA is a polymer built out of four canonical nucleobases: adenine (A), uracil (U), guanine (G), and cytosine (C). However, it remains unclear how canonical nucleobases got selected from the hundreds available in nature. Here, we show that the non-canonical nucleobase 2,6-diaminopurine (D) base pairs with U in water and the solid state without the need to be attached to the ribose-phosphate backbone. Depending on the temperature and water availability in the system, D and U assemble in thermodynamically stable hydrated and anhydrated D-U base-paired cocrystals. Structural studies show that the water molecules contribute favorably to the stabilization energies in D-U cocrystal hydrate due to the role of water in forming inter-layer hydrogen bonds. In the anhydrate cocrystal form, D and U molecules exhibit advantageous homomeric stacking interactions and hydrogen bonding. Under UV irradiation, an aqueous solution of D-U base-pair undergoes photochemical degradation, while a pure aqueous solution of U does not, thus demonstrating that base-pairing alters the photostability of U. To understand this decreased photostability of U, we model the main channel for U photodestruction, i.e., covalent photodimerization. Our simulations suggest that D may trigger the U photodimerization because of its ability to form hydrogen bonds with π-stacking dimers of U. Our results indicate that complementary base-pairing of D and U in prebiotic surface environments may have played a role in chemical evolution. In a broader context, supramolecular interactions between small biological building blocks may offer new insights into the origin of life.
Dihydrolevoglucosenone (Cyrene) as a bio-based green alternative to organic solvents for the preparation of supramolecular gels consisting of self-assembling dipeptide derivatives
Authors: Sugiura Shintaro , Shintani Yuki , Higashi Sayuri L. , Shibata Aya , Ikeda Masato
Published: June 2023

Herein, we describe the use of Cyrene, a bio-based green solvent, to prepare supramolecular gels composed of self-assembling dipeptide derivatives. The gelation behavior was evaluated using a conventional tube-inversion method. The basic properties of the obtained supramolecular gels, including critical gel concentrations, gel-to-sol transition temperatures, and viscoelastic properties, were assessed. In addition, the self-assembled fibrous network inside the gels was investigated via confocal laser scanning microscopy after fluorescence staining. The results offer important insights into the preparation of supramolecular gel-based materials with minimal environmental damage for practical applications.
Electron spin polarization in supramolecular polymers with complex pathways
Authors: Hong Kyeong-Im , Kumar Abhinandan , Garcia Ana M. , Majumder Subrata , Carretero Amparo
Published: June 2023

Mastering the manipulation of the electron spin plays a crucial role in comprehending the behavior of organic materials in various practical applications, such as asymmetric catalysis, chiroptical switches, and electronic devices. A promising avenue for achieving precise such control lies in the Chiral Induced Spin Selectivity (CISS) effect, where electrons with a favored spin exhibit preferential transport through chiral assemblies of specific handedness. Chiral supramolecular polymers emerge as excellent candidates for exploring the CISS effect due to their ability to modulate their helical structure through noncovalent interactions. Chiral supramolecular polymers capable of responding to external stimuli are particularly intriguing, sometimes even displaying chirality inversion. This study unveils spin selectivity in chiral supramolecular polymers, derived from single enantiomers, through scanning tunneling microscopy (STM) conducted in scanning tunneling spectroscopy (STS) mode. Following two distinct sample preparation protocols for each enantiomer, we generate supramolecular polymers with opposite handedness and specific spin transport characteristics. Our primary focus centers on chiral -conjugated building blocks, with the aim of advancing novel systems that can inspire the organic spintronics community from a supramolecular chemistry level
Calcium-Stabilised Transition Metal Bis(Formyl) Complexes: Structure and Bonding
Authors: Parr Joseph , White Andrew , Crimmin Mark
Published: June 2023

Reaction of a molecular calcium hydride with a series of group 9 dicarbonyl complexes [M(C5Me5)(CO)2] (M = Co, Rh, Ir) led to the formation of both mono(formyl) and bis(formyl) complexes. The bis(formyl) complexes are unique. They have been characterised by multinuclear NMR spectroscopy and examples have been crystallographically characterised for the first time.
Automated Analysis of Nano-Impact Single-Entity Electrochemistry Signals using Unsupervised Machine Learning and Template Matching
Authors: Zhao Ziwen , Naha Arunava , Ganguli Sagar , Sekretareva Alina
Published: June 2023

Nano-impact single-entity electrochemistry (NIE) is an emerging technique that enables electrochemical investigation of individual entities, ranging from metal nanoparticles to single cells and biomolecules. To extract meaningful information from NIE experiments, statistical analysis of large datasets is necessary. In this study, we developed a method for the automated analysis of NIE data based on unsupervised machine learning and template matching approaches. Template matching not only facilitates downstream processing of the NIE data but also provides a more accurate analysis of the NIE signal characteristics and variations that are difficult to discern with conventional data analysis techniques, such as the height threshold method. The developed algorithm enables fast automated processing of large experimental datasets recorded with different systems, requiring minimal human intervention and thereby eliminating human bias in data analysis. As a result, it improves the standardization of data processing and NIE signal interpretation across various experiments and applications.
pH drives electron density fluctuations that enhance electric field-induced liquid flow
Authors: Pullanchery Saranya , Kulik Sergey , Schönfeldová Tereza , Cassone Giuseppe , Hassanali Ali , Roke Sylvie
Published: June 2023

Liquid flow along a charged interface is commonly described by a classical continuum theory, which assumes ionic groups as responsible, uniformly distributed point charge carriers. Within this framework, electric field-induced flow (electro-osmosis or -phoresis) arises from charged ionic groups at the surface that interact with an external field. Changing bulk pH doubles the electrophoresis and osmosis by changing the number of surface charges. Here, we challenge this idea, combining measurements of hydrophobic nanodroplet velocity in water under an external field, all-optical surface charge density, and surface molecular structure measurements with quantum level computations. We show that classical continuum theory fails under the general case that the pH of the solution is varied and that the resulting increase in mobility originates from charge density fluctuations. The force that propels the droplets originates from gradients in the fluctuating electron polarizability that interact with the external electric field. Basic solutions display hydroxide-induced and electric field-enhanced charge asymmetry. This doubles the solutions’ charge conductivity, manifesting as a change in the solutions’ polarizability. The electromagnetic energy gradient responsible for the propelling force is proportional to the solutions’ polarizability, which leads to the remarkable influence of bulk pH on electrophoresis (and -osmosis). This general mechanism deeply impacts a plethora of processes in biology, chemistry, and nanotechnology and provides a unified explanation of how pH influences hydrodynamics.
Lógica difusa para regular la velocidad de un motor de corriente continua (CC)
Authors: Tejada Muñoz Guillermo
Published: June 2023

Este estudio se enfoca en diseñar y describir el funcionamiento de un controlador difuso para regular la velocidad de un motor de corriente continua (CC), el cual es ampliamente utilizado en diversas áreas, como naves espaciales, maquinaria de defensa, robótica, trenes eléctricos, vehículos eléctricos y grúas. Los resultados del controlador difuso se compararon con los de un controlador proporcional integral derivativo (PID), que se sintonizó utilizando herramientas de MATLAB. Se midieron los transitorios de la curva de velocidad del motor, como el tiempo de subida (rise time), el tiempo de estabilización (settling time) y el sobreimpulso (overshoot). En términos de transitorios, el controlador difuso propuesto logró mejores resultados que el controlador PID sintonizado por MATLAB.
Comparativa entre RESNET-50, VGG-16, Vision Transformer y Swin Transformer para el reconocimiento facial con oclusión de una mascarilla
Authors: Tafur Acenjo Brenda Xiomara , Tello Pariona Martin Alexis , Escobedo Cárdenas Edwin Jhonatan
Published: June 2023

En la búsqueda de soluciones sin contacto físico en espacios cerrados para la verificación de identidad en el contexto de la pandemia por el SARS-CoV-2, el reconocimiento facial ha tomado relevancia. Uno de los retos en este ámbito es la oclusión por mascarilla, ya que oculta más del 50 % del rostro. La presente investigación evaluó cuatro modelos preentrenados por aprendizaje por transferencia: VGG-16, RESNET-50, Vision Transformer (ViT) y Swin Transformer, los cuales se entrenaron en sus capas superiores con un conjunto de datos propio. Para el entrenamiento sin mascarilla, se obtuvo un accuracy de 24 % (RESNET-50), 25 % (VGG-16), 96 % (ViT) y 91 % (Swin). En cambio, con mascarilla se obtuvo un accuracy de 32 % (RESNET-50), 53 % (VGG-16), 87 % (ViT) y 61 % (Swin). Estos porcentajes de testing accuracy indican que las arquitecturas más modernas como los transformers arrojan mejores resultados en el reconocimiento con mascarilla que las CNN (VGG-16 y RESNET-50). El aporte de la investigación recae en la experimentación con dos tipos de arquitecturas: CNN y transformers, así como en la creación del conjunto de datos público que se comparte a la comunidad científica. Este trabajo robustece el estado del arte de la visión computacional en el reconocimiento facial por oclusión de una mascarilla, ya que ilustra con experimentos la variación del accuracy con distintos escenarios y arquitecturas.
THỰC TRẠNG SẢN XUẤT, SỬ DỤNG DẦU LẠC TRUYỀN THỐNG Ở TỈNH THỪA THIÊN HUẾ VÀ ẢNH HƯỞNG CỦA CHẾ ĐỘ XỬ LÝ NHIỆT ĐẾN CHẤT LƯỢNG BAN ĐẦU CỦA DẦU LẠC
Authors: Nguyễn Thị Thủy Tiên , Trần Bảo Khánh , Lê Thị Khánh Huyền , Đỗ Thị Bích Thủy , Nguyễn Hiền Trang
Published: June 2023

Sản xuất dầu lạc truyền thống ở Thừa Thiên Huế vẫn còn nhỏ lẻ, quy trình không thống nhất, chủ yếu dựa trên kinh nghiệm của các hộ sản xuất nên chất lượng không ổn định. Người sản xuất ít quan tâm đến chất lượng nguyên liệu ban đầu. Khoảng 61,3% số hộ không xử lý lạc nhân trước khi ép và 6,5% không lắng lọc dầu trước khi đem đi tiêu thụ. Bột lạc được hấp trung bình 28,38 phút trước khi ép. Tất cả các cơ sở sản xuất không có công đoạn sấy sau khi hấp. Lý do chính để người tiêu dùng sử dụng sản phẩm này là nhờ vào tính nguyên chất, đậm đặc (89%) và an toàn (88%) vì không sử dụng hóa chất trong quá trình sản xuất và bảo quản. Chúng tôi đánh giá chất lượng ban đầu của dầu lạc dựa trên tỷ lệ dầu thu được, màu và mùi, hàm lượng tạp chất không tan, hàm lượng nước trong dầu, chỉ số iốt, peroxide, xà phòng và axit với các chế độ xử lý nhiệt khác nhau bao gồm hấp và hấp kết hợp sấy. Kết quả cho thấy thời gian hấp bột lạc 30 phút và sấy bột chưng trong 5 phút ở 100 °C giúp nâng cao tỷ lệ dầu thu được, màu sắc dầu sáng hơn, hàm lượng nước trong dầu thấp hơn và chất lượng dầu thu được tốt hơn so với mẫu không có quá trình sấy bột lạc sau khi chưng.
XÂY DỰNG KHUNG ỨNG DỤNG AI CHATBOT TRONG LĨNH VỰC QUY CHẾ ĐÀO TẠO
Authors: Đoàn Hồng Phước , Lê Văn Tường Lân , Nguyễn Văn Trung
Published: June 2023

Trong vài thập niên gần đây, trợ lý ảo thông minh (AI chatbot) đã và đang được nghiên cứu và phát triển trong nhiều lĩnh vực như thương mại điện tử, chăm sóc sức khỏe, du lịch và giáo dục do những thuận lợi của chúng trong việc tương tác giữa người và máy bằng ngôn ngữ tự nhiên. Quy chế đào tạo đại học giúp cho sinh viên đưa ra kế hoạch học tập phù hợp. Tuy nhiên, hiện tại sinh viên chỉ tiếp cận các quy chế này thông qua sổ tay sinh viên, các cố vấn học tập hoặc chuyên viên phòng Đào tạo. Việc này làm mất rất nhiều thời gian của sinh viên, cán bộ giảng dạy cũng như chuyên viên các phòng ban trong nhà trường. Để giải quyết vấn đề này, chúng tôi đề xuất một khung ứng dụng AI chatbot dựa trên nền tảng Rasa và áp dụng thử nghiệm vào lĩnh vực quy chế đào tạo đại học. Kết quả chạy thử nghiệm chương trình cho thấy rằng độ chính xác của mô hình hiểu ngôn ngữ tự nhiên là 84,6% và độ chính xác theo đánh giá của các chuyên gia là 89,3%.
MỘT CẢI TIẾN CỦA PHOBERT NHẰM TĂNG KHẢ NĂNG HIỂU TIẾNG VIỆT CỦA CHATBOT THÔNG TIN KHÁCH SẠN
Authors: Ngô Văn Sơn , Nguyễn Thị Minh Nghĩa , Hoàng Thị Huế , Nguyễn Hữu Liêm , Võ Viết Minh Nhật
Published: June 2023

Chatbot hỗ trợ thông tin du lịch bằng tiếng Việt đang thu hút nhiều sự quan tâm của giới nghiên cứu và cả kinh doanh. Các chatbot truyền thống thường được xây dựng dựa trên cơ sở các quy tắc, kiến thức hay trạng thái hữu hạn nên thường kém hiệu quả. Gần đây, nhờ những bước tiến lớn của học máy trong xử lý ngôn ngữ tự nhiên, chatbot đã đạt được những bước tiến đáng kể trong phân loại ý định, trích xuất thực thể và phân tích tình cảm. Bài báo này đề xuất một cải tiến của mô hình tiền huấn luyện nhằm xây dựng một chatbot thông tin khách sạn bằng tiếng Việt. Với đề xuất điều chỉnh các mô hình tiền huấn luyện nhằm đánh giá xem mô hình nào hoạt động tốt nhất, kết quả mô phỏng cho thấy rằng đề xuất của chúng tôi đã mang lại hiệu quả đáng kể với Accuracy 96,4%, F1-score 96,9% và Precision 97,4%.
Plasmon-Exciton Interaction in Perspective Hetero-Systems
Authors: Ohon Natalia , Bulavinets Tetiana , Yaremchuk Iryna , Lesyuk Rostyslav
Published: June 2023

Surface plasmons and excitons have been widely studied experimentally and theoretically for various material systems. However, a number of aspects require further deeper study and understanding, among which the connection of these quasi-particles occupies an important place. New physical effects arise when plasmons and excitons in nanostructures begin to be localized at certain small distances, as a result, we can talk about their coupling. Complex systems containing the excitation of plasmons and excitons, as well as their coupling, show interesting optical properties that they cannot exhibit individually. In this type of system, the plasmon enhances the coupling between the system and the external field, and the exciton controls certain spectral properties, which opens up new possibilities for tuning their optical response. The transferred energy between plasmons and excitons becomes an important factor affecting their interaction when the resonance frequency of the localized plasmon is very close to the molecular energy transition frequency. Two types of coupling can occur depending on the ratio between the strength of the coupling and the energy losses of individual components in the system, namely strong and weak. In addition to the mutual coupling between the plasmon and the exciton, their different linewidths and ability to couple to an external field provide a variety of means to tune the optical properties of hybrid systems. Thus, it enables precise control of light at the nanometer scale, opening up possibilities for new electronics and photonics applications. In this review, we highlight the features of weak and strong modes of plasmon-exciton coupling, modern trends, and perspectives in the study of hetero-systems semiconductor–metal, metal–2D material, semiconductor–molecule, etc. Semiconductor-metal hybrid nanostructures open up exciting opportunities for the study of quantum phenomena, optical processes, and multiparticle interactions and confidently lead to application in new photonics devices.
Study of the Nuclear Structure for Some Nuclei Using Self-Consistent RPA Calculations with Skyrme-Type Interaction
Authors: Kareem Noor M. , Alzubadi Ali A.
Published: June 2023

In the present research, some static and dynamic nuclear properties of the closed-shell nuclei; 58Ni, 90Zr, 116Sn, and 144Sm nuclei have been studied using the Random Phase Approximation (RPA) method framework and different Skyrme parameterizations, particularly SyO-, Sk255, SyO+, SLy4, BSk17, and SLy5. In particular, in studies of static properties such as nuclear densities for neutrons, protons, mass, and charge densities with their corresponding rms radii, the single-particle nuclear density distributions All the obtained results agreed well with the relevant experimental data. Concerning the dynamic properties, the excitation energy, transition density, and giant resonance modes for the excitation to the low-lying negative partite excited states 1–, 3–, 5–, and 7– have also been studied. The findings indicate that estimates of RPA with Skyrme-type interactions are a good way to describe the properties of the structure of even-even, closed-shell nuclei.
Numerical Study of 25.459% Alloyed Inorganic Lead-Free Perovskite CsSnGeI3-Based Solar Cell by Device Simulation
Authors: Abdulmalik Muhammed O. , Danladi Eli , Obasi Rita C. , Gyuk Philibus M. , Salifu Francis U. , Magaji Suleiman , Egbugha Anselem C. , Thomas Daniel
Published: June 2023

The toxic lead component as well as the expensive and less stable spiro-OMeTAD in perovskite solar cells (PSCs) pose a great deal of hindrance to their commercial viability. Herein, a computational approach towards modeling and simulation of all inorganic cesium tin-germanium triiodide (CsSnGeI3) based perovskite solar cell was proposed and implemented using solar cell capacitance simulator (SCAPS–1D) tool. Aluminium doped zinc oxide (ZnO:Al) and Copper Iodide (CuI) were used as electron and hole transport layers (ETL and HTL) respectively. The initial device without any optimization gave a power conversion efficiency (PCE) of 24.826%, fill factor (FF) of 86.336%, short circuit current density (Jsc) of 26.174 mA/cm2 and open circuit voltage (Voc) of 1.099 V. On varying the aforementioned parameters individually while keeping others constant, the optimal values are 1000 nm for absorber thickness, 1014 cm-3 for absorber layer defect density, 50 nm for ETL thickness, 1017 cm-3 for ETL doping concentration and 260 K for temperature. Simulating with these optimized values results to PCE of 25.459%, Voc of 1.145 V, Jsc of 25.241 mA/cm2, and a FF of 88.060%. These results indicate that the CsSnGeI3 is a viable alternative absorbing layer for usage in the design of a high PCE perovskite solar cell device.
Utilizing Spectroscopy and Optical Microscopy to Characterize Titanium Dioxide Thin Films
Authors: Al Dmour Hmoud
Published: June 2023

This paper presents the surface electronic structure and morphological characteristics of the nano-crystalline titanium dioxide (nc TiO2) films derived from the two different sol-gels. Using Scanning tunneling microscopy/spectroscopy (STM/S), it was found that the particles of nc-TiO2 produced from batch A have a surface band gap of ~3.3 eV while the particles of nc-TiO2 produced from batch B have a surface band gap of ~2.6 eV. On other hand, the small particles have aggregated together to form larger particles ranging from ~120 nm to 150 nm in size and distributed randomly over the surface of the batch A nc-TiO2 films. For batch B nc-TiO2films, the small particles have formed larger particles but with their size ranging from 200 nm to 225 nm. That is ascribed to differences between sol-gels used to prepare nc-TiO2 films. As a result of that, the electric power of batch A nc-TiO2/P3HT solar cells is enhanced by more than 8 times in comparison with batch B solar cells.
Preparation and Characterization of Cu2CrSnS4 Thin Films Deposited at Different Temperatures
Authors: Talib Huda , Bakr Nabeel A. , Abed Mohammed A.
Published: June 2023

In this study, Cu2CrSnS4 thin films are prepared using chemical pyrolysis technique at various deposition temperatures (200, 250, 300, 350, 400 and 450 °C) and without any annealing process. The structure characteristics of the films have been studied by X ray diffraction (XRD), micro-Raman spectroscopy, and Field Emission Scanning Electron Microscope (FESEM), while the optical characteristics are investigated by UV-Visible spectrophotometry, and the electrical properties aree described by Hall Effect test. Results of XRD for Cu2CrSnS4 (CCTS) films showed the tetragonal crystal structure of stannite phase with (112) preferred orientation. The results of Raman spectroscopy of the prepared CCTS thin films showed a clear peak at ~ 336 cm-1. Furthermore, the morphology results and through (FESEM) images of thin films surface showed different forms and shapes with different granular size ranging from 40 to 294 nm. Optical examination of the ultraviolet-visible spectrum showed an optical energy gap of (1.69-1.59 eV) which are considered to be suitable for thin films solar cells applications. The electrical measurements through Hall Effect test showed that the films have charge carriers of (p-type). From results analysis, the optimized temperature of the prepared (CCTS) samples was 350 oC.
Self-perceived health of older adults in Latin America and the Caribbean: a scoping review
Authors: Kaufman Hannah , Howell Samantha , Stolow Jeni , Andrinopoulos Katherine , Anglewicz Philip , Burt Martín , Castro Arachu
Published: June 2023

Objective.

To systematically map the existing evidence on self-perceived health among adults aged 60 and older in Latin America and the Caribbean, describe the use of the single-item measure of self-perceived health with this population, and identify gaps in the existing literature.

Methods.

Following PRISMA Extension for Scoping Reviews guidelines, eight databases were searched for publications that were published between 2009 and 2019 and reported self-perceived health of adults over 60 years old in Latin America and the Caribbean. Data on study characteristics, sample characteristics, and the use and analysis of the self-perceived health measure were charted.

Results.

The database and secondary searches identified 516 articles. After removing duplicates and assessing titles and abstracts for inclusion, 263 full-text articles were assessed for eligibility using the inclusion criteria and an additional 89 articles were excluded. Ultimately, 174 articles were included in the scoping review. Studies included participants from 17 countries in the region, led in frequency by Brazil with 120 articles. The self-perceived health question most often included a five-category response scale (130), and response options were predominantly divided into two (86) or three (48) categories for analysis.

Conclusions.

. Information on the health and social needs of people aged 60 and older across Latin America and the Caribbean, particularly their perceptions of health, is limited. We highlight the need to expand research throughout the region, include particularly vulnerable populations, utilize data from longitudinal and qualitative studies, and call for transparency in how questions and responses are worded and analyzed. This review serves to inform future studies, programs, and policies directed at this population.
A simplex and multiplex PCR assay for simultaneous detection of beef, pork, and chicken meat in sausages based on mitochondrial DNA Cytochrome oxidase sub-unit I
Authors: Boyrusbianto F.T. , Utama D.T. , Khikmawati I. , Fadhila A. , Volkandari S.D. , Abdurrahman Z.H. , Pramono A. , Cahyadi M.
Published: June 2023

Adulteration in the processed beef product industry has long been an issue affecting consumers’ rights and legal protection as beef is an expensive raw material. The intense market competition opens up opportunities for manufacturers of processed beef products to counterfeit and mixes their products with other cheap meat ingredients such as chicken and pork. In addition, the use of pork to substitute beef in the production of sausages without proper labelling on the final products is both an adulteration and halal assurance issue in the Muslim-majority market. Multiplex PCR is a sensitive assay used for the identification of raw materials used in the production of processed food and it reduces the cost and time of analyzing a large number of samples. The purpose of this research was to apply the multiplex PCR assay targeting mitochondrial DNA Cytochrome Oxidase SubUnit I (COI) sequence and to determine the detection limits for DNA concentrations in beef, pork, and chicken. The DNA genomes that were extracted from each meat were diluted to concentrations of 25; 10; 1; 0.1; 0.01; and 0.001 ng/µL, and then used as a DNA template for the simplex- and multiplex-PCR. The results of simplex- and multiplex-PCR showed that the COI primers used were able to amplify the DNA of bovine, porcine, and chicken accurately as indicated by amplicons of 263 bp, 168 bp, and 596 bp, respectively. It was concluded that the simplex- and multiplex-PCR methods using COI primers can be used to identify bovine, porcine, and chicken DNA isolated from sausages with a sensitivity of 0.001 ng/μL.
Melting behaviour of cocoa butter substitutes synthesised by enzymatic glycerolysis of coconut oil and palm stearin blends
Authors: Subroto E. , Indiarto R. , Pangawikan A.D. , Lembong E. , Wulandari E. , Selica A. , Hartomo J.I.
Published: June 2023

Cocoa Butter (CB) is a speciality fat required in various products, but its availability is limited and has adverse health effects. Therefore, an alternative to CB is needed. This study aimed to synthesise cocoa butter substitutes (CBS) rich in monolaurin by enzymatic glycerolysis of coconut oil (CNO) and palm stearin (PS) blends. The ratios of CNO to PS used were 7:3, 6:4, and 5:5 (w/w). Several characteristics related to the melting behaviour of CBS were analysed. The results showed that CBS contained monoacylglycerol (MAG) and diacylglycerol (DAG) about 55.89-57.28% and 34.27-39.57%, respectively, while MAG fraction contained monolaurin of 25.31-37.07%. CBS rich in monolaurin produced from the CNO-PS ratio of 6:4 had the slip melting point and the melting point similar to CB, namely, 34.87±0.08°C and 36.75±0.14°C, respectively. In addition, the melting profile and solid fat content (SFC) were also comparable to CB but slightly lower than CB. The obtained CBS had 5% compatibility with CB to maintain the same melting profile as CB. CBS synthesised by enzymatic glycerolysis of coconut oil and palm stearin blends has the potential to partially replace CB.
Test please ignore
Authors:   , Yeates Stuart
Published: June 2023

test please ignore
Analysis of the Clinical Effects of Clopidogrel in the Treatment of Unstable Angina and the Influence of Triacylglycerol and Total Cholesterol Levels
Authors: Ning Yuzhen , Yang Huailu , Shuang Lian
Published: June 2023

Objective: To explore the clinical value of clopidogrel as the main treatment for patients with unstable angina. Methods: From January 2020 to December 2022, we assigned 50 cases to the control group (basic treatment) and 50 cases to the observation group (basic treatment with clopidogrel). The clinical data of both groups of patients were analyzed. Results: The total effective rate of the observation group was significantly higher than that of the control group after treatment (P < 0.05). Before treatment, there were no significant differences in the duration of angina pectoris and frequency of attacks between the two groups (P > 0.05); after treatment, the duration of angina pectoris and frequency of attacks in the observation group were significantly lower than those in the control group (P < 0.05). Before treatment, there were no significant differences in hemorheological indices, triacylglycerol (TG), total cholesterol (TC), and platelet aggregation rate between the two groups (P > 0.05); however, after treatment, they were significantly lower in the observation group than in the control group (P < 0.05). Before treatment, there was no significant difference in the scores of SF-36 between the two groups (P > 0.05); after treatment, the SF-36 score of the observation group was significantly higher than that of the control group (P < 0.05). Conclusion: Clopidogrel can promote the rehabilitation of patients with unstable angina during treatment. Compared with conventional basic treatment, it can reinforce the final therapeutic effect. In addition, our study showed that the duration of angina pectoris and the frequency of attacks were shortened after clopidogrel therapy and the treatment had an effect on improving patients’ hemorheological indices, TG, TC, and platelet aggregation rate. Clopidogrel therapy plays an important role in ensuring the quality of life of patients after recovery.
Penerapan Model Pembelajaran Inquiry pada Materi Pengukuran untuk Meningkatkan Hasil Belajar Siswa
Authors: Irmina Falentina Genoveva , Hau Rambu Ririnsia Harra , Elizabeth Agustina
Published: June 2023

Penelitian ini bertujuan untuk meningkatkan hasil belajar siswa kelas X dengan menerapkan model pembelajaran Inquiry pada materi pengukuran. Metode penelitian yang digunakan adalah penelitian tindakan kelas yang dilaksanakan di SMA Negeri 1 Talibura. Subjek penelitian ini adalah siswa kelas X MIA 2 Tahun Ajaran 2022/2023 yang berjumlah 28 orang. Teknik pengumpulan data yang digunakan dalam penelitian ini adalah tes dan observasi. Adapun teknik analisis data yang digunakan adalah kuantitatif deskriptif. Hasil penelitian menunjukkan bahwa pada pra siklus ketuntasan hasil belajar siswa mencapai 71,42% kriteria cukup, pada siklus I mencapai 78,57% kriteria cukup dengan rata-rata nilai 68,57, dan pada siklus II mencapai 96,42% kriteria baik sekali dengan rata-rata nilai 84,82. Hal ini menunjukkan bahwa hasil belajar siswa kelas X MIA 2 telah melebihi indikator pencapaian persentase ketuntasan klasikal yang memenuhi nilai KKM sebesar 80%. Dengan demikian penerapan model pembelajaran Inquiry dapat meningkatkan hasil belajar siswa kelas X MIA 2 pada materi pengukuran.

Kata Kunci:

Inquiry; Hasil Belajar; Pengukuran

Implementation of the Inquiry Learning Model on Measurement to Improve Students' Learning Outcomes

ABSTRACT

This study aimed to improve the learning outcomes of class X students by applying the inquiry learning model to measurement. The research method used was classroom action research conducted at SMA Negeri 1 Talibura. The subjects of this study were 28 class X MIA 2 students for the 2022/2023 Academic Year. Data collection techniques used in this study were tests and observation. The data analysis technique used was descriptive quantitative. The results showed that in the pre-cycle completeness of student learning outcomes reached 71.42% sufficient criteria, in cycle I, it reached 78.57% sufficient criteria with an average value of 68.57, and in cycle II, it reached 96.42% very good criteria with an average value of 84,82. This showed that the learning outcomes of class X MIA 2 students had exceeded the indicator of achieving the percentage of classical completeness that meets the KKM value of 80%. Thus, the implementation of the Inquiry learning model could improve the learning outcomes of class X MIA 2 students on measurement.
Competencias mediáticas y digitales, frente a la desinformación e infoxicación
Authors: Portugal Rigliana , Aguaded Ignacio
Published: June 2023

El estudio aborda el panorama de confianza que existe a nivel mundial, frente a plataformas digitales y medios tradicionales. Destaca un crecimiento acelerado de la desconfianza que tienen los usuarios ante los citados medios. En ese contexto se explica la situación de desinformación e infoxicación que caracteriza la esfera digital internacional, la cual promueve la presencia, cada vez mayor, de noticias falsas (fake news). Por tanto, el periodismo en la convergencia mediática, caracterizada por lógicas multipantalla, requiere del fortalecimiento de las competencias mediáticas (saber, saber hacer y saber ser) de usuarios que consumen y producen contenido (prosumers), así como de competencias digitales que se expresan en la gestión de información, la comunicación, la creación del contenido, la resolución de problemas y la seguridad (Ávalos, Pérez-Escoda y Monge, 2019, p. 238). La experiencia del fact checking es ejemplo de competencia mediática, desarrollada con sentido crítico frente a la desinformación e infoxicación.