bluuebunny/crossref_metadata_2025 huggingface dataset:
Implementation of an access control system based on bimodal biometrics with fusion of global decisions: Application to facial recognition and fingerprints
Authors: Boluma Mangata Bopatriciat , Ilunga Nakashama Dominique , Kadima Muamba Donatien , Bukanga Christian Parfum
Published: October 2022

Single-mode biometric systems suffer from several problems that make them unsuitable for current biometric applications that require high levels of reliability and security. These problems include the use of a single biometric trait that is prone to noise, poor capture, lack of biometric points, and deterioration of biometric input quality. In this paper, we are interested in decision fusion access control on a biometric bimodal pattern recognition system based on fingerprints and facial recognition. To realize this access control system based on facial recognition and fingerprints, we used an embedded system under Arduino, we programmed electronic systems for the automatic opening of doors without human action being. The performance evaluation of decision fusion access control on a biometric bimodal pattern recognition system is realized by means of the confusion matrix, the calculations of the evaluation parameters (Sensitivity, Specificity, Positive Predictive Value, Negative Predictive Value and False Negative). From a sample of 500 individuals, 250 of whom were registered and 250 non-registered, our access control system obtained the results of 248 true positives, 2 false negative, 1 false positive and 249 true negatives which constitute our confusion matrix. However, from the set of tests performed we can conclude that by taking advantage of the fusion of these two modalities, we increase the verification performance of system as the verification performance of bimodal system (fingerprint decision fusion and facial recognition) is applied to give even better results compared to single mode systems.
Factors Affecting Mental Illness and Social Stress in Students Using Fuzzy TOPSIS
Authors: Ibrahim Izleen , Mansor Nurul Hidayah , Bidin Jasmani
Published: October 2022

A disorder known as mental illness alters a personâ€™s emotions, thoughts, or behaviour. Any of these elements alone or in combination may cause it. If stress cannot be managed, people of all ages, races, religions, sexes, and nationalities can develop mental illnesses. The development of mental diseases is significantly influenced by stress. Risk factors for mental illness and social stress include academic stress, socioeconomic position, and financial difficulties. All of these risk variables are challenging to pinpoint because they come from many environments. The purpose of this study is to identify the key aspects that students experience that contribute to mental illness and social stress, as well as to rank those factors by using Fuzzy Technique for Order Preference by Similarity to Ideal Solution (TOPSIS). This study ranks social life, academic life, and financial status as the three factors that have the greatest influence on mental illness and social stress among college students. The following evaluation criteria are used to grade the components: family background, educational attainment, physical health, and mode of study. Additionally, Fuzzy TOPSIS is used to rank the variables according to correlation. The issues in this study are evaluated by three decision-makers using linguistic characteristics ranging from â€œvery affectedâ€ to â€œnot affectedâ€. With a proximity value of 0.469, the research demonstrates that academic life has a significant impact on studentâ€™s mental health and social stress. With a closeness coefficient of 0.358, social life is the least significant factor. The results of this study may be useful to many people, including parents, counsellors, and the kids themselves. The projectâ€™s scope could be expanded in the future by adding a range of criteria and options.
Solving the Travelling Salesman Problem by Using Artificial Bee Colony Algorithm
Authors: Jamaluddin Siti Hafawati , Mohd Naziri Noor Ainul Hayati , Mahmud Norwaziah , Muhammat Pazil Nur Syuhada
Published: October 2022

Travelling Salesman Problem (TSP) is a list of cities that must visit all cities that start and end in the same city to find the minimum cost of time or distance. The Artificial Bee Colony (ABC) algorithm was used in this study to resolve the TSP. ABC algorithms is an optimisation technique that simulates the foraging behaviour of honey bees and has been successfully applied to various practical issues. ABC algorithm has three types of bees that are used by bees, onlooker bees, and scout bees. In Bavaria from the Library of Traveling Salesman Problem, the distance from one city to another has been used to find the best solution for the shortest distance. The result shows that the best solution for the shortest distance that travellers have to travel in all the 29 cities in Bavaria is 3974km.
Short Term Forecast of COVID-19 cases in Japan Using Time Series Analysis Models
Authors: Mohamad Nor Nor Azriani , Abdul Aziz Azlan , Wan Shahidan Wan Nurshazelin , Wan Shahidan Wan Nurshazelin , Muhamad Siti Nor Nadrah
Published: October 2022

The new strain of coronavirus (COVID-19) was found to have started in Wuhan, China in late December 2019. The virus has spread to countries all over the world including Japan. The World Health Organization (WHO) declared COVID-19 as a pandemic on 11 March 2020 due to the increasing number of confirmed cases and deaths daily. The COVID-19 outbreak has impacted the nation of Japan adversely and the number of confirmed cases in Japan continues to increase day by day. On 7 April 2020, Japan declared a state of emergency to prevent the pandemic from worsening. This study is conducted to forecast new daily confirmed cases of COVID-19 in Japan over a short-term period. Four univariate time series models were applied: the Naïve Model, Mean Model, Autoregressive Integrated Moving Average (ARIMA) Model and Exponential State Space Model. This study analyses daily data from 22 January to 10 April 2020 collected from the Our World in Data website. The prediction involves five phases of data analysis and five different partitions of estimation and evaluation parts in every model to ensure the accuracy of forecast values. R and R Studio software were used in this study to analyze the data. The results reveal that Naïve model with 99 percent of estimation part and 1 percent evaluation part produces the lowest value of error measures for Mean Error (ME), Root Mean Square Error (RMSE), Mean Absolute Error (MAE), Mean Absolute Percentage Error (MAPE), and Mean Absolute Scaled Error (MASE).
Evaluation of the Best E-commerce Websites in Malaysia Using Fuzzy AHP
Authors: Muhamad Siti Nor Nadrah , Zaib Umairah Najwa , Ab Hamid Mohd Halimi
Published: October 2022

E-commerce, often known as electronic commerce, is a method of doing business that involves purchasing and selling products and services via a digital network like the internet. Since there are various types of e-commerce websites in Malaysia like Lazada, Shopee and PGMall, the consumers have difficulties choosing which e-commerce websites to access for online shopping. The organisation also finds it hard to make a judgement about which sites to use for their online transaction and human judgement for decision making is not reliable in our daily life.  The Fuzzy AHP method was used in this study to select the best e-commerce websites in Malaysia. The research aim is to determine the criteria when choosing e-commerce websites, identify sub-criteria that impact e-commerce website rankings and investigate the best rank of e-commerce in Malaysia. In this study, two decision-makers examine three criteria and eight sub-criteria to determine the best e-commerce websites in Malaysia. There are three websites to choose from Shopee, Lazada, and PGMall. The criteria are system quality, information quality, and service quality. Besides, the sub-criteria are access speed, visual appearance, response time, reliable information, update information, accurate information, tracking order status, and payment alternatives. The primary data was used by distributing a set of questionnaires to the experts in the field. Shopee is the best e-commerce website in Malaysia, according to the results, with a normalised score of 0.4488. Lazada comes in second with a normalised 0.4360, and PGMall with a normalised 0.1153. As a result, Shopee outperforms the other two online transaction platforms, Lazada and PGMall.
Development of Mobile Application with Geolocation Technology for Car Service Workshop
Authors: Othman Nor Arzami , Osman Mohd Nizam , Sedek Khairul Anwar , Mohd Bohari Muhammad Farid
Published: October 2022

Mobile application with geolocation function has been on the market for quite some time. It has been implemented on most of the application to detect the user current location. With the lack of use and awareness of this features, we took that opportunities to develop mobile app and collaborate with YS Auto Workshop. It will detect the customer current location when they request for car breakdown from YS Auto workshop. Notification will be sent to the manager of the workshop and can see the marker on user current location and take an action. Main objectives are to design and develop mobile app and to evaluate its usage using user acceptance test in improving the user needs. Agile methodology has been used based on requirement and it is suitable in the development of mobile application. The development of the system has use agile method which has fifth phases including planning, analysis, design, development, and testing. Three expert users involve during Functionality Testing meanwhile thirty random selected respondents from district of Batang Kali involved in the experiment and perform Heuristic Evaluation and User Acceptance Test questionnaires. Analysis shown that application is interesting and helpful. The system is developed successfully and can make more improvement for the future.
e-Runner: A Mobile Application for Campus Food Delivery Service
Authors: Hamid Jiwa Noris , Adnan Ammar , Mohd Ekhsan Hawa
Published: October 2022

Nowadays, technology has played a vital role in revolutionizing the food delivery service and benefits the students, runners, and food outlets in many ways. Life as a student is known to be challenging due to academic load, assignment deadlines, bouncing back and forth to class, extra-curricular activities, etc. This is a typical daily scenario on campus that require good time management. In the preliminary investigation of this study, students prefer to take away their food and dine in their rooms so that they will not waste their time by spending too much time in the cafeteria. It is found that convenience is the prime factor for the students as the orders can be made as simple as a few clicks on any mobile device, and the food and beverages are delivered to their doorstep. Additionally, this can prevent them from spending too much or wasting time buying food. Since food delivery becoming popular and preferable recently, thus, this study is aimed to develop a mobile application named e-Runner for the campus food delivery system. Students can make a food order, check the order status, and view a variety of food and beverages from several food outlets. The modified Waterfall Model has been used as the methodology of this study and consists of 4 phases, namely Requirement Analysis, Design, Implementation, and Testing. The application has been tested using two types of testing; Functionality and Usability Testing. The testing results show that this application has many benefits, such as saving time, convenience and act as an all-in-one platform. Furthermore, it can enhance students' lifestyles and can improve customer experience.
Comparison of Fuzzy Time Series and ARIMA Model for Predicting Stock Prices
Authors: Nor Syazwina Binti Mohd Hanafiah  , Shafii Nor Hayati Binti , Nur Fatihah Binti Fauzi  , Diana Sirmayunie Mohd Nasir  , Nor Azriani Mohamad Nor
Published: October 2022

The stock market has always been a contentious topic in society, and it is a place where economic standards are established. The stock market is incredibly unpredictable and turbulent. This means that the shares may fluctuate for reasons that are sometimes difficult to understand.  Due to this uncertainty, many investors believe the stock market as a risky investment.  Therefore, having an accurate picture of future market environment is crucial to minimising losses. Forecasting is a technique of predicting the future based on the outcome of the previous data.  There are a wide range of forecasting algorithms, however, this study only focuses on these two techniques: Auto Regressive Moving Average (ARIMA) model and Fuzzy Time Series (FTS) Model. The goal of this study is to evaluate and compare the effectiveness of the ARIMA model and the FTS model in predicting sample data of stock prices of Top Glove Corporation Berhad since this company is the largest glove supplier in the world and plays a significant role in the Covid-19 global pandemic crisis. The error measures that were taken into consideration consist of Root Mean Square Error (RMSE), Mean Square Error (MSE), and Mean Absolute Percentage Error (MAPE). These measurements were computed numerically and graphically using a statistical programme called EViews.  The outcome shows that the ARIMA model performs better than the FTS model in terms of forecasting accuracy and provides the lowest values of MAPE, MSE, and RMSE, which are 10.58757, 0.926354, and 0.962473, respectively.
Fires in the Waste Management Sector in Romania. Frequency, Causes and Spatial Distribution
Authors:   Center for Geographic Research, Cluj-Napoca Subsidiary of the Romanian Academy, Cluj-Napoca, Romania. Email: magdalena.dragan@academia-cj.ro., Drăgan Magdalena
Published: October 2022

"Fires in the waste management sector in Romania. Frequency, causes and spatial distribution. Large waste fires are severe hazards to the human health and to the environment due to the sudden release of pollutants they imply. In this study we take a first step towards a better understanding of this phenomenon in Romania by creating and analyzing a waste fire database. Starting from a public data set regarding firefighting interventions in the waste management sector between 2016 and 2020, we have identified three main types of fires – fires at the municipal waste collection points, surface waste fires and fires at waste recycling facilities. We further calculated the frequency of these fires, identified their causes, and their spatial distribution. Keywords: waste fires, health, hazard, persistent organic pollutants, fire causes. "
The Elderly Dependency Rate in Urban Areas of Transylvania Region Between 1992 and 2021
Authors:   Doctoral School of Geography, Faculty of Geography, Babeș-Bolyai University, Cluj-Napoca, Romania. Email: raisa.tarus@ubbcluj.ro., Țăruș Raisa , Dezsi Ștefan ,   Department of Human Geography and Tourism, Center for Research on Settlements and Urbanism, Babeş-Bolyai University, Cluj-Napoca, Romania. Email: stefan.dezsi@ubbcluj.ro.
Published: October 2022

"The Elderly Dependency Rate in Urban Areas of Transylvania Region between 1992 and 2021. Population ageing becomes a serious issue not only in developed countries, but also in a post-socialist country such as Romania. Nowadays, the demographic tendencies of ageing trends are visible in the demographic dynamics of developed countries, especially in Central and Eastern European Countries in the context of economic growth and population loss. For example, in Romania, it is noticeable in urban areas and rural areas where the demographic trajectories show the presence of a certain demographic phenomenon in age structure of population such as “population ageing”. In the last decades, Romania has entered a period of rapid and dramatic ageing demographic phase. In this respect, first we investigate the phenomenon of population ageing in Transylvania region. Secondly, the paper presents the calculation of elderly dependency rate based on demographic statistical data provided by the National Institute of Statistics. Thirdly, it drives some possible social-economic effects of the progressive process of ageing tendency. Keywords: Ageing population, elderly people, population decline, Romania, Transylvania region "
Unele aspecte referitoare la geografia universitară clujeană din perioada 1940-1947
Authors:   Institute of Geography of the Romanian Academy, 12 Dimitrie Racoviță Street, sector 2, RO-023993, Bucharest, Romania. Email: geacusorin@yahoo.com., Geacu Sorin
Published: October 2022

"Some aspects related to Geography in the Cluj University between 1940 and 1947. The study includes a series of information that came out from the research of the archives belonging to the Romanian National Archives in Bucharest, regarding the troublesome period when the Cluj School of Geography and its Institute took refuge in Sibiu and Timișoara, and then came back to Cluj. The paper approaches several aspects concerning the organization and framing of the School of Geography departments, promotions that took place during that time, but also purges made on political criteria, as well as the involvement of staff members of the Institute of Geography within the Cluj University in the national action to support the territorial integrity of Transylvania, by means of their scientific research and studies. Keywords: „King Ferdinand I” University, refuge, Centre of Transylvanian Studies, Scientific sessions of Geography professors, Romanian Geographical Review, Transylvania, studies, territorial integrity. "
Participative Planning in the Context of Metropolitan Governance. A Case of Cluj Metropolitan Area
Authors:   Faculty of Geography, Babes-Bolyai University, Research Centre for Sustainable Development, 5-7 Clinicilor Street, 400006 Cluj-Napoca, Romania. Email: julia.nagyy@gmail.com., Nagy Júlia A. , Pop Ana-Maria ,   Centre for Regional Geography, Faculty of Geography, Babeș-Bolyai University, Cluj-Napoca, Romania.
Published: October 2022

"Participative Planning in the Context of Metropolitan Governance. A Case of Cluj Metropolitan Area. Public participation became an essential element of the modern governance practice and a norm in the contemporary spatial planning. It is also endorsed as an important component in creating sustainable development and an efficient tool in strengthening legitimacy. Nevertheless, there is also a lack of confidence in management decisions and in political structures as mechanisms to conduct effective strategic governance and to address the needs of various stakeholders in the strategy and policy formulation. The aim of study is to examine how public participation is perceived in the view of different stakeholders in a complex governance setting of a metropolitan area. The findings show that the process of public participation is perceived differently depending on the group of stakeholders and the actual public involvement differs between the rural areas and the urban core. Although public engagement is widely endorsed, there are different views on what this process should comprise. Nevertheless, the question of how far the common citizens actually influenced the spatial development of the metropolitan area, is open for debate. Keywords: public participation, metropolitan governance, public engagement, strategic planning "
Elements and Aspects of Cohesion in the Tourism of Sălaj County
Authors:   ‟Babeș-Bolyai” University, Faculty of Geography, Centre for Regional Geography, Cluj-Napoca, Romania. Email: rozalia.benedek@ubbcluj.ro., Benedek Rozalia
Published: October 2022

"Elements and Aspects of Cohesion in the Tourism of Sălaj County. This present research highlights leisure time, through the potential of various cultural resources, offered and practiced throughout history in the current perimeter of Sălaj County. The sites of human settlements in the studied area show that the inhabitants of these lands have found a favorable place here to form developed communities, which is an important perspective in describing the topics covered. The tourist activity is getting amplified at county level also due to the strategies undertaken by the Tourist Information Centers. They are involved in organizing and developing events for promotion and capitalization, offering new perspectives for certain traditional activities, which in their absence would risk being lost due to lack of profitability. Thus, tourism receives a cohesive character, determining the maintenance of local values and their transformation into economic goods. The centers with the highest degree of cohesion are those in Zalău and Șimleu Silvaniei, which have managed to develop a tradition of annually organized festivals. Keywords: leisure time, tourism, history, cohesion, Sălaj, Șimleu Silvaniei, Zalău. "
THE STUDENTS’ PERCEPTION OF THE ONLINE TEACHING-LEARNING DURING COVID-19 PANDEMIC
Authors: BUTOI Elisabeta , GICĂ Oana Adriana , BESSEL Zsolt
Published: October 2022

The Covid-19 outbreak forced educational institutions to shift from face-to-face to online teaching-learning in a very short time. The students and teachers had to learn by doing and to adapt quickly. Therefore, the focus of this study was to examine the main determinants of students’ perceived learning experience and satisfaction with the online classes. The data was gathered from bachelors’ students. The quantitative approach was implemented to analyse the subject. The findings show positive influence of faculty support, course design and students’ involvement on the students’ perceived learning experience through the e-learning platform and online classes. The student satisfaction with online teaching-learning is predicted by the perceived learning experience through the e-learning platform and online classes. The findings also emphasize the role of information and communication technologies (ICTs), as in the digital era the use of e-learning platforms is essential for the educational institutions.
Article history: Received 31 August 2022; Revised 19 September 2022; Accepted 27 September 2022; Available online 25 October 2022; Available print 25 November 2022.
JEL Classification: M10, M12, M15, M54
Anna Bon di Venezia, la osadía de ser mujer y compositora en el siglo XVIII
Authors: Galván Gabriela Susana
Published: October 2022

El artículo explora y analiza la primera sonata del opus 1 de la compositora veneciana haciendo foco en distinguir y reconocer sus gestos compositivos y cómo dialogan estos con el canon dominante con la finalidad de divulgar un repertorio que ha permanecido sistemáticamente relegado.
Lo figural como acontecimiento sensible
Authors: Geymonat Analía Amalia
Published: October 2022

El concepto de lo figural como presencia en el cine de Brakhage es evidencia de su irrupción como acontecimiento sensible. Entender el lenguaje de formas y colores definiendo sensaciones, a la manera de fibrilaciones sensoriales que van potenciando la experiencia de la abstracción, inscribe cuestiones epistemológicas acerca de la potencia expresiva de la imagen fílmica.
La destreza de lo cotidiano
Authors: Reggiani Catalina
Published: October 2022

Cuatro poemas de la autora.
Interacciones humano-animal: introducción al dossier
Authors: Díaz-Videla Marcos
Published: October 2022

El Dr. Marcos Díaz Videla, coordinador del dossier “Interacciones humano-animal”, presenta los contenidos del mismo.
Cuatro desafíos para la enseñanza de la psicología desde una perspectiva decolonial
Authors: Poó Fernando Martín , Ostrovsky Ana Elisa
Published: October 2022

Criticar los saberes y las prácticas disciplinares desde una perspectiva decolonial implica un ejercicio de revisión constante e imaginación propositiva. Quienes nos dedicamos a la docencia universitaria y proponemos programas de estudio en carreras de psicología nos enfrentamos a una serie de desafíos derivados de la necesidad de conjugar los requerimientos curriculares y la pregnancia de lo heredado con la revisión constante de lo impartido. La mirada decolonial nos permite repensar nuestra localización geopolítica y las perspectivas asumidas. En este trabajo presentamos algunos de esos desafíos que identificamos como un conjunto de problemas a revisar en la enseñanza de la psicología. El primero de ellos consiste en la pregunta por la identidad, el segundo subraya el carácter interseccional de la perspectiva decolonial, el tercer desafío se centra en el problema del lenguaje y el último se ocupa de la tensión entre la autonomía y la dependencia académica.
Advertising Special Project in Online Media: Characteristics of Phenomenon in Russian Research
Authors: Boldina K. A.
Published: October 2022

A review of Russian studies, which are devoted to the study of the content and structural features of advertising special projects, is made. This phenomenon is at the intersection of multimedia journalism, digital marketing and Public Relations. It has not yet received a clear definition and does not have a strict classification due to the dynamic development within the last decade (since the first examples of special projects appeared in 2012). At the same time, special projects can be called one of the permanent areas of the editorial offices work of modern Russian online media. Creating special projects for brands allows the media to maintain self-sufficiency by providing a creative and most effective advertising service. An overview of the Russian scientists’ opinion on the distinctive characteristics of the special project from other journalistic materials is included in the article. It contains options for interpreting the definition of “advertising special project” and options for the kinds and types of the phenomenon. It is concluded that researchers attribute special projects to non-standard media materials, note their integrative nature, attraction to multimedia and the mandatory presence of marketing goals.
Secondary Specialized Educational Institutions of Tyumen in 1920—1930s
Authors: Borodulina E. V. , Skochin A. V.
Published: October 2022

Issues related to the material and personnel aspects in the initial period of the formation of secondary specialized educational institutions in Tyumen in the 1920—1930s are considered. Attention is paid to the study of the process of creating a network of educational institutions, areas of student training are identified, and data on the dynamics of the number of students are given. The analysis results of the material base of technical schools formation are presented. The problems that students had to face in the learning process were identified. An assessment of the material and technical conditions of educational activities is made. The authors dwell on the study of the staff of secondary specialized educational institutions of the city. Attention is paid to the analysis of the level of education and qualifications of teachers. The material working conditions of the teaching staff are investigated. The authors note a certain dynamics in solving the material and personnel problems of technical schools in the period under study, despite the fact that the existing opportunities of educational institutions were significantly inferior to the needs of the population in obtaining professional education. The conclusion is made about the degree of provision of educational institutions of the city with teaching and administrative personnel. The impact of this problem on the quality of student training is assessed.
Territorial Distribution of Soviet Industry in Context of Preparation of USSR for a Major War (Late 1920s — Early 1940s)
Authors: Davydov A. Yu.
Published: October 2022

The author considers the complex process of preparing the USSR for war in the context of the implementation of “socialist reconstruction” (a term put forward by I. V. Stalin in November 1929), which meant a radical restructuring of the economic sphere and related institutions. The article poses a complex problem that presents a symbiosis of a number of topics — the NEP, industrialization, the construction of socialism in the Stalinist way, preparations for a big war. Comprehending the key trends in the evolution of the modernization breakthrough of the late 1920s — early 1940s, the author points to two stages. The first (actually continuing the NEP) was dominated by the principles of the planned use of resources, the content of the second was reduced to the next assault on socialism. The researcher comes to the conclusion that the damage caused to the national economy turned out to be significant and became the reason for the disproportionality of its development. The document presents evidence of the fallacy of the territorial organization of heavy industry and, above all, the military-defense complex on the eve of June 22, 1941. The cause of the catastrophe of the first period of the Great Patriotic War is revealed in the loss of the most important enterprises located mainly in areas close to the western border.
Naval Policy of Canada during First World War (1914—1918)
Authors: Simonenko E. S.
Published: October 2022

The activities of the Navy Ministry of Canada during the First World War are analyzed in the article. For the first time in Russian historiography, the main directions of Canada’s maritime policy are formulated within the framework of the government’s military course during the First World War. The sources for the study were the debates of the House of Commons of the Canadian Parliament, publications in the Canadian press, the military series of historical and statistical collections and journalism of those years. The state of Canadian naval bases and ports, as well as the features of the development of the shipbuilding industry of the dominion during the war years is characterized. It is proved that during the war years, Canada’s maritime policy was determined by the British Admiralty and developed in two directions: imperial and national. The development of the imperial direction of maritime policy was carried out in the interests of Great Britain. It provided for the recruitment of Canadian volunteers for service in the Royal Navy and the development of a shipbuilding industry for the needs of the British Navy. The national direction of maritime policy provided for the protection of Canadian coasts and territorial waters, for which the infrastructure of Canadian naval bases and ports was actively used. To perform patrol and escort functions, state and private vessels were involved not only for military, but also for civilian purposes.
Strategy to implement RapidArc® using HD120™MLC for irradiation of whole pelvis and lower para-aortic lymph nodes in cervical carcinoma
Authors: Chairmadurai 1 Arun , Goel Harish Chandra , Ganesan Vasu , Subramani 1 Vikraman , Jain 1 Sandeep Kumar , Kumar 1 Vikash
Published: October 2022

Purpose: To compare the utility of RapidArc® technique with mono or dual isocentre using high-definition 120 multileaf collimator (HD120™MLC) for irradiation of whole pelvis and lower para-aortic lymph node (PALN) in cervical carcinoma.Methods: Ten patients having more than 22-cm treatment target length were delivered 45 Gy in 25 fractions by RapidArc® technique using mono or dual isocenter. Dose distribution characteristics were monitored using various indices. Doses to critical organs were also compared for the sparing effects.Results: Conformity and dose-gradient indices for mono or dual isocenter plans were comparable. However, mono-isocentric plan decreased the heterogeneity index (0.07±0.01) as compared to dual-isocentric plan (0.08±0.01; p<0.05). Mean and maximal doses to various critical organs remained comparable. The mean dose to bowel bag was significantly reduced (p<0.05) in mono-isocentric plan (18.78±5.18 Gy) as compared to dual-isocentric plan (19.20±5.27 Gy). Mono-isocentric plan required 1.3 times higher exposure time than the dual-isocentric plans but reduced the overall treatment time by eliminating intra-fraction patient shift that is inevitable in dual isocenter plan.Discussion: Feasibility of mono-isocentric RapidArc® plan using HD120™MLC for irradiation of whole pelvis and PALN relied on ‘Maximum Leaf Span’, which restricted the ‘leading-leaf’ to surpass the ‘trailing-leaf’ beyond 15-cm. This difficulty was overcome by truncating the field size and fixing the jaws at dedicated positions in mono-isocentric plan.Conclusion: The strategy used in mono-isocentric plan enhanced the utility of RapidArc® using HD120™MLC and also minimized the intra-fraction set-up variations and overall treatment time.
An ultrathin compact metamaterial based wideband reflective linear polarization rotator
Authors: Sood 1 Deepak , Gopal 1 Krishan
Published: October 2022

In this paper, a wideband and compact metamaterial based reflective polarization rotator is theoretically and experimentally demonstrated. The proposed design converts linearly polarized incident wave to its cross polarized wave and exhibits wideband reflective polarization rotation from 8.40 to 12.41 GHz with relative bandwidth of 38.5%. The structure exhibits linear polarization conversion for wide oblique angles of incident wave. The proposed structure is compact with its unit cell size of ~0.19λ0 and ultrathin with its overall thickness of ~0.055λ0 (at the center frequency of 10.41 GHz) as compared to the existing polarization rotators. A prototype of the proposed design has been fabricated and its experimental verifications are observed in agreement with the simulated results.
Pulmonary dynamics of anatomical structures of interest in 4DCT imaging
Authors: Hernández-Juárez Sarahí , Mejía-Rodríguez Aldo Rodrigo , Arce-Santana Edgar R.
Published: October 2022

The present work shows an application of the Chan-Vese algorithm for the semi-automatic segmentation of anatomical structures of interest (lungs and lung tumor) in 4DCT images of the thorax, as well as their three-dimensional reconstruction. The segmentation and reconstruction were performed on 10 CT images, which make up an inspiration-expiration cycle. The maximum displacement was calculated for the case of the lung tumor using the reconstructions of the onset of inspiration, the onset of expiration, and the voxel information. The proposed method achieves appropriate segmentation of the studied structures regardless of their size and shape. The three-dimensional reconstruction allows us to visualize the dynamics of the structures of interest throughout the respiratory cycle. In the future, it is expected to have more evidence of the good performance of the proposed method and to have the feedback of the clinical expert, since the knowledge of the characteristics of anatomical structures, such as their dimension and spatial position, helps in the planning of Radiotherapy (RT) treatments, optimizing the radiation dose to cancer cells and minimizing it in healthy organs. Therefore, the information found in this work may be of interest for the planning of RT treatments.
Use of magnetic resonance imaging and computed tomography in postmortem diagnostics
Authors: Najar-Céspedes Andrea Paola , Fuentes-Martínez Esteban de Jesús
Published: October 2022

Introduction: Given the heterogeneous nature and inherent complexity of forensic medical expertise, the expert (medical professional or related areas) must make the best use of the technical and technological tools at his disposal. Imaging, referring to the set of techniques that allow obtaining images of the human body for clinical or scientific purposes, in any of its techniques, is a powerful support tool for establishing facts or technical evidence in the legal field. Objective: To analyze the use of magnetic resonance and computed tomography in postmortem diagnosis. Methodology: information was searched in the databases PubMed, Science Direct, Springer Journal and in the search engine Google Scholar, using the terms “X-Ray Computed Tomography”, “Magnetic Resonance Spectroscopy”, “Autopsy” and “Forensic Medicine” published in the period 2008–2015. Results: MRI is useful for the detailed study of soft tissues and organs, while computed tomography allows the identification of fractures, calcifications, implants and trauma. Conclusions: In the reports found in the literature search, regarding the use of nuclear magnetic resonance and computed tomography in postmortem cases, named by the genesis of the trauma, correlation was found between the use of imaging and the correct expert diagnosis at autopsy.
The prevalence and characterization of implant-related findings in panoramic radiographs
Authors: Sánchez Silvia Barrientos , Rodríguez Ciodaro Adriana , Martínez Laverde David , Curan Cantoral Alejandro
Published: October 2022

Introduction: In Colombia, the last oral health study showed that about 70% of the population has partial edentulism while 5.2% will have lost all their teeth between the age of 65 and 79. Rehabilitation with implants is an increasingly used option, which requires clinical and radiographic follow-up. Panoramic radiography is a low-cost option, in which it is possible to observe areas of bone loss, mesiodistal angulation of the implant, relationship with anatomical structures and lesions suggestive of peri-implantitis. Reports and analysis of relevant data on radiographic findings associated with dental implants are required to determine the risk factors for their success in patients who use them. Objective: To determine the prevalence and characterize the findings associated with osseointegration implants in panoramic radiographs. Methods: A descriptive cross-sectional observational study was carried out with 10,000 digital panoramic radiographs selected by convenience from radiological centers in the city of Bogota, Colombia, of which 543 corresponded to the sample analyzed for the presence of implants. The following were evaluated for each implant: location, position, angulation and distances to adjacent structures, using the Clínicalview® program (Orthopantomograph OP200D, Instrumentarium, USA). Results: The frequency of radiographs with implants was 5.43% with a total of 1,791 implants, with an average of 3.2 per radiograph. They were found in greater proportion in the upper jaw with a supracrestal location and an angulation of 10.3 degrees. 32% had implant/tooth or implant/implant distances that were less than optimal. 40.9% were restored and 1.2% showed lesions compatible with periimplantitis. Conclusions: A high percentage of the implants reviewed have a risk factor that affects their long-term viability, either due to angulation, supracrestal or crestal position, proximity to teeth or other implants, or because they are not restorable.
Control chest x-ray in patients with asymptomatic posttraumatic pneumothorax
Authors: Correa-Restrepo Julieta , Restrepo-Moreno Mónica , Peláez Luis Guillermo , Díaz-Cadavid Rafael , López-Vasco Yuliana , Rojas María Alejandra , Mejía-Toro David Alejandro , Morales-Uribe Carlos Hernando
Published: October 2022

Introduction: Chest trauma has a high incidence and pneumothorax is the most frequent finding. The literature is scarce on what to do with asymptomatic patients with pneumothorax due to penetrating chest trauma. The aim of this study was to evaluate what are the findings of the control radiography of patients with penetrating chest trauma who are not initially taken to surgery, and their usefulness in determining the need for further treatment. Methods: A retrospective cohort study was performed, including patients older than 15 years who were admitted for penetrating chest trauma between January 2015 and December 2017 and who did not require initial surgical management. We analyzed the results of chest radiography, the time of its acquisition, and the behavior decided according to the findings in patients initially left under observation. Results: A total of 1,554 patients were included, whose average age was 30 years, 92.5% were male and 97% had a sharp weapon wound. Of these, 186 (51.5%) had no alterations in their initial X-ray, 142 had pneumothorax less than 30% and 33 had pneumothorax greater than 30 %, hemopneumothorax or hemothorax. Closed thoracostomy was required as the final procedure in 78 cases, sternotomy or thoracotomy in 2 cases and discharged in 281. Conclusion: In asymptomatic patients with small or moderate pneumothorax and no other significant lesions, longer observation times, radiographs and closed thoracostomy may be unnecessary.
Assessment of the ponticulus posticus based on the skeletal relationship in strict lateral radiographs
Authors: Cook García Blásquez Jonathan
Published: October 2022

Objective: To evaluate the ponticulus posticus according to the skeletal relationship found in strict lateral radiographs at the Centro Dental Docente of the Universidad Peruana Cayetano Heredia during the period 2015–2017, using the classification according to the degree of mineralization described by Selby and Steiner’s skeletal relationship classification. Material and methods: It was performed on digital strict lateral radiographs using a 20-inch screen using the SIDEXIS XG program, observing the degree of mineralization of the ponticulus posticus: without evidence of the bony spicule over the vertebral artery = absent bridge, when spicule formation and/or calcification was noted or evident in the middle of the bridge or incompletely = partial bridge, when the bony arch was evident finished visualizing = complete bridge and the classification of the skeletal relationship by measuring the ANB angle: Class I = 0–4°; Class II = >4° and Class III = <0°: the statistical analysis was done with the SPSS V program.22.0 for Windows using the Chi-square tests. Results: Of the 925 digital strict lateral radiographs evaluated, 283 radiographs were found to present ponticulus posticus and the highest frequency was found in the absent type (69.4%), the partial type (17.1%) and the complete type (13.5%). The ponticulus posticus was present in 25.1% of the female and 38.4% of the male. The skeletal relationship associated with ponticulus posticus was present in Class II (19.1%), Class I (10.4%) and Class III (1.1%). Conclusions: The ponticulus posticus is an anatomical variant present in 30.6% of cases. No statistically significant difference was found between the presence of ponticulus posticus and skeletal relationship or sex.
Application of infrared thermography in radiation protection and other medical fields
Authors: Yao Zhen , Zhao Minyan , Liu Yulong
Published: October 2022

Infrared thermal imaging technology is another new branch for medical imaging after traditional medical imaging technologies such as X-ray, ultrasound and magnetic resonance (MRI). It has the advantages of noninvasive, nondestructive, simple and fast. Its application can radiate multiple clinical departments. This paper mainly expounds the principle, influencing factors of medical infrared thermography and its application in radiation protection and other medical fields.
Neuropsychological and magnetic resonance imaging (MRI) diagnostics in secondary progressive multiple sclerosis
Authors: Penner Iris-Katharina , Gass Achim , Schreiber Herbert , Wattjes Mike Peter
Published: October 2022

Background: Multiple sclerosis is often a longitudinal disease continuum with an initial relapsing-remitting phase (RRMS) and later secondary progression (SPMS). Most currently approved therapies are not sufficiently effective in SPMS. Early detection of SPMS conversion is therefore critical for therapy selection. Important decision-making tools may include testing of partial cognitive performance and magnetic resonance imaging (MRI). Aim of the work: To demonstrate the importance of cognitive testing and MRI for the prediction and detection of SPMS conversion. Elaboration of strategies for follow-up and therapy management in practice, especially in outpatient care. Material and methods: Review based on an unsystematic literature search. Results: Standardized cognitive testing can be helpful for early SPMS diagnosis and facilitate progression assessment. Annual use of sensitive screening tests such as Symbol Digit Modalities Test (SDMT) and Brief Visual Memory Test-Revised (BVMT-R) or the Brief International Cognitive Assessment for MS (BICAMS) test battery is recommended. Persistent inﬂammatory activity on MRI in the first three years of disease and the presence of cortical lesions are predictive of SPMS conversion. Standardized MRI monitoring for features of progressive MS can support clinically and neurocognitively based suspicion of SPMS. Discussion: Interdisciplinary care of MS patients by clinically skilled neurologists, supported by neuropsychological testing and MRI, has a high value for SPMS prediction and diagnosis. The latter allows early conversion to appropriate therapies, as SPMS requires different interventions than RRMS. After drug switching, clinical, neuropsychological, and imaging vigilance allows stringent monitoring for neuroinﬂammatory and degenerative activity as well as treatment complications.
Analysis of innovation chain structure of global geographic infor-mation industry
Authors: Wang Yue , Wang Tao
Published: October 2022

Taking the geographic information industry as the research object, using the authorized invention patent data, this paper puts forward the research method of industrial innovation chain structure based on the geographic information industry chain. Then, from the perspective of overall structure and specific regional structure, the development status of the innovation chain is quantitatively evaluated, which is helpful to all countries in the world. The structural integrity and leading links of the innovation chain especially in China, the United States and Japan are compared and analyzed. The results show that: (1) from the perspective of the overall structure, the global innovation chain presents an “inverted triangle” structure due to the weak innovation ability of downstream links. From the perspective of specific regional structure, the innovation chain of geographic information industry in most countries and regions is incomplete, and there are broken links or isolated links. The global innovation chain except China has cracks between the upstream and downstream due to the relative weakness of the midstream links, showing “hourglass-shaped” structure with a wide upper part, narrow lower part and narrow middle part. (2) Relatively speaking, China’s industrial innovation chain is relatively complete, and the midstream link has significant comparative advantages in the global market. However, the industry university research cooperation in the innovation chain is weak, the degree of marketization is low, and the technological competitiveness lags behind that of the United States.