bluuebunny/crossref_metadata_2025 huggingface dataset:
Automatic Selection and Parameter Optimization of Mathematical Models Based on Machine Learning
Authors: Zhang Shuangbo
Published: April 2024

With the rapid progress of machine learning (ML) technology, more and more ML algorithms have emerged, and the complexity of models is also constantly increasing. This development trend brings two significant challenges in practice: how to choose appropriate algorithm models and how to optimize hyperparameters for these models. In this context, the concept of Automatic Machine Learning (AutoML) has emerged. Due to the applicability of different algorithm models to different data types and problem scenarios, it is crucial to automatically select the most suitable model based on the characteristics of specific tasks. AutoML integrates multiple ML algorithms and automatically filters based on the statistical characteristics of data and task requirements, aiming to provide users with the best model selection solution. Hyperparameters are parameters that ML models need to set before training, such as learning rate, number of iterations, regularization strength, etc., which have a significant impact on the performance of the model. AutoML integrates advanced hyperparameter optimization techniques to automatically find the optimal parameter combination, thereby improving the model's generalization ability and prediction accuracy. This article studies the automatic selection and parameter optimization of mathematical models based on ML.
The prospect exploration of artificial intelligence technology and its application
Authors: Gu Fangyu
Published: April 2024

With the rapid development of science and technology, artificial intelligence technology has become one of the most popular research fields in today's society. From intelligent voice assistants to self-driving cars, to medical diagnostics and financial risk control, AI technology has shown huge potential and value in all fields. This paper deeply explores the current situation, development trend and its application prospect of artificial intelligence technology in various industries. This paper briefly introduces the development process of artificial intelligence technology, including its origin, development status and key technologies. Then, it focuses on the application cases of AI technology in healthcare, finance, education, industry and other fields, and evaluates its impact and potential value. It discusses the challenges of artificial intelligence technology, such as data security and privacy protection, algorithm fairness and moral considerations. In view of these problems, the corresponding solution strategies and development suggestions are put forward. The future development trend of artificial intelligence technology is discussed, including the research and application of cutting-edge technologies such as deep learning, natural language processing and emotional computing. The conclusion pointed out that artificial intelligence technology will continue to change human life in the future and bring more innovation and breakthrough to various industries.
Research on Stock Price Prediction and Quantitative Stock Picking Strategy Based on Deep Learning
Authors: Ji Jiahao
Published: April 2024

With the continuous development of the domestic stock market and the continuous improvement of the financial system system, and at the same time, the domestic stock market gradually rises in the financial system, based on the prediction research of the domestic stock market will become more and more important. In order to solve the problems of low precision and poor accuracy of short-term stock price prediction, this paper selects the bi-directional long- and short-term memory network of attention mechanism (WOA-BiLSTM-Attenion) model under the whale optimization algorithm for stock price prediction. The modeling of bi-directional long- and short-term memory network with attention mechanism can reduce the loss of historical information and increase the influence of important information. On this basis, Whale Optimization Algorithm (WOA) is then used for hyperparameter selection to reduce human interference. The experimental results show that compared with BP, LSTM, BiLSTM, BiLSTM-Attention, the WOA-BiLSTM-Attenion model has a better effect on stock closing price prediction, with a value of 13.9446, and the value of 0.9477, which has a higher accuracy, with a view to providing certain reference for the prediction research in other fields.
La manufacture des objectifs optiques de Zeiss
Authors: Daigle Allain
Published: April 2024

Les objectifs sont classés en fonction de leur longueur focale, mais ils se caractérisent aussi souvent par leur provenance: nombre de cinéastes sauraient distinguer un objectif ordinaire de marque inconnue d’un autre portant la signature de Zeiss. Ce parcours soutient que les différences de qualité attribuées aux objectifs ont émergé au fil du temps et sont dans une large mesure le résultat du processus historique d’industrialisation qui s’est déroulé à la fin du XIXe et au début du XXe siècle. Ce parcours s’intéresse en particulier à la société Zeiss, qui a joué un rôle clé dans l’émergence de l’optique moderne. Les années 1890 à 1915 coïncidant avec les débuts du cinéma, nous verrons comment la société Zeiss a développé non seulement des objectifs, mais aussi un vaste marché et un ensemble de croyances relatives au fonctionnement et aux critères de qualité des objectifs de précision.
La remédiation des images de cinéma dans le jeu vidéo
Authors: Therrien Carl , Aycock John , Poremba Cindy
Published: April 2024

Bien avant l’apparition des simulations photoréalistes en 3D, les développeurs de jeux vidéo ont été obnubilés par un désir de mimétisme. Le jeu vidéo est prisonnier d’un paradoxe qui explique en partie cette obsession : foncièrement interactif, il procure un effet d’immédiateté bien supérieur à celui des médias produits à partir de prises de vues réelles. Cependant, en matière de réalisme visuel, il parvient difficilement à les égaler. Ce livre numérique raconte l’histoire de cette obsession, mettant en relief les efforts que les concepteurs de jeux ont déployés ainsi que les multiples défis technologiques rencontrés. Il souligne également en quoi la remédiation de séquences vidéo filmées a donné lieu à un phénomène intermédial inédit : la vague du « cinéma interactif » des années 1990, dont la contribution à l’histoire du jeu vidéo demeure sujette à débat.
Industrialisation du dessin animé aux États-Unis
Authors: Massuet Jean-Baptiste
Published: April 2024

Lorsque l’on évoque le terme « dessin animé », un certain imaginaire se déploie assez instantanément, imaginaire qui repose en grande partie sur un modèle industriel hérité des productions de Walt Disney. La logique technique qui sous-tend ce modèle a une longue histoire, qui s’inaugure en grande partie aux États-Unis dans un contexte qu’il convient d’interroger. Les années 1910 témoignent en effet d’une série de tâtonnements et d’expérimentations permettant de concevoir des dessins animés dans un temps réduit afin d’en accroître la production, et donc la rentabilité. En ce sens, la mise en place par l’industrie du dessin animé de méthodes calquées sur l’imaginaire technique de la caméra de cinéma s’avère moins le fait d’un désir d’intégration aux formes filmiques dominantes que d’une tentative de mécanisation de la production d’images en mouvement.
L’Afrique de l’Ouest à l’heure des acquisitions massives de terres
Authors: Minville-Gallagher Myriam
Published: April 2024

Cet article présente, de manière succincte, les premières conclusions de la première phase de l’étude sur les acquisitions massives de terres en Afrique de l’Ouest et leurs conséquences sur la souveraineté alimentaire et les moyens d’existence des exploitations familiales. Il explore l’ampleur et la nature des acquisitions, les stratégies et modalités de cession, le rôle des acteurs (inter)nationaux et leurs motivations. Les premiers résultats laissent à penser que le phénomène handicape les activités agricoles des communautés à la base et provoque la hausse des inégalités et des conflits sociaux.
Mouvement paysan et réforme agraire aux Philippines
Authors: Talbot Geneviève
Published: April 2024

Les réformes agraires sont souvent perçues comme un outil essentiel à la lutte à

l’accaparement des terres. L’analyse de la mobilisation paysanne aux Philippines

pour le renouvèlement du programme de réforme agraire est une illustration

de la capacité d’influence et du pouvoir du mouvement paysan. Lors de cette

mobilisation, un nouvel acteur est apparu : les organisations internationales.

Cependant, il reste à voir si la capacité de mobilisation du mouvement paysan

persistera une fois la réforme adoptée et si cette dernière sera un outil efficace pour

contrer l’accaparement des terres.
Vers des formes alternatives positives d’investissement dans l’agriculture
Authors: Kay Sylvia
Published: April 2024

Le phénomène de l’accaparement des terres nécessite un changement de paradigme, non pas opposant l’investissement dans l’agriculture, mais le refaçonnant, afin qu’il serve un développement rural durable et réellement en faveur des plus pauvres. Dans la lignée de cette approche alternative, il faut ainsi se réapproprier la notion d’investissement. La reconnaissance des petits agriculteurs comme les principaux investisseurs dans l’agriculture est la première étape vers la récupération du lieu de souveraineté. L’article explore deux exemples de formes alternatives positives d’investissement, les régimes d’investissement de Cuba et du Zimbabwe.
Notre Terre, Leur Business
Authors: Monee Mike
Published: April 2024

Paroles de chanson
Le féminisme n’est pas mort, il est bien vivant, nous l’avons rencontré
Authors: Jammal Nadine
Published: April 2024

Éditorial
Enjeux pour la prochaine politique énergétique du Québec
Authors: Mousseau Normand
Published: April 2024

Cet article fut écrit, en bonne partie, lors d’un séjour à l’École de physique des Houches, en France. Je tiens à remercier les organisateurs de l’École d’été pour leur invitation et tout le personnel de l’École pour un environnement de travail exceptionnel.
Une démocratie citoyenne
Authors: Cuvillier Anne-Isabelle
Published: April 2024

Une population dont le territoire est planifié par d’autres, aménagé par d’autres, géré par d’autres, exproprié par d’autres, dans un but et une perspective établis par d’autres et auprofit des autres est réduite à l’insignifiance. – René Lévesque
Le pétrole... et après
Authors: Gagnon Gabriel
Published: April 2024

Éditorial
L’anarcho-indigénisme
Authors: Dupuis-Déri Francis , Pillet Benjamin
Published: April 2024

Au moins depuis la publication du livre L’Entraide de Pierre Kropotkine1, au début du XXe siècle, les anarchistes s’intéressent aux sociétés autochtones qui offrent des exemples de sociétés plus égalitaires et moins autoritaires. En 2005, le Mohawk Gerald Taiaiake Alfred, originaire de Kahnawá:ke, a proposé le terme « anarcho-indigénisme » pour désigner cette dynamique de convergence entre les idées et les pratiques des autochtones traditionalistes et des anarchistes altermondialistes. Nous avons lancé, voici quelques mois, un projet de livre sur ce thème, dont chaque chapitre sera une entrevue avec un ou une autochtone qui livrera ses réflexions au sujet de la politique, du pouvoir, de l’égalité et de la liberté, en se référant à ses expériences et à celles de sa communauté. Nous vous présentons ici des extraits de deux des entrevues déjà réalisées. Le livre devrait paraître aux éditions Lux.
La crise des années 1960-1970 revisitée
Authors: Roc Jean-Claude
Published: April 2024

Vers la fin des années 1960, le système de production capitaliste est l’objet d’une crise profonde. De crise latente, elle devient ouverte avec les chocs pétroliers et les révoltes ouvrières. Certaines analyses ne retiennent que son aspect économique et négligent ses aspects institutionnels. L’objectif de ce texte est de combler ce vide.
Cartes des nations autochtones; Prières
Authors: Langevin Ève Marie , Fortin François
Published: April 2024

Introduction
Hommage à Nicole Laurin
Authors: Jammal Nadine
Published: April 2024

Intermède
Harmonie et cadavre exquis
Authors: Langevin Ève Marie , Caragioiu Melania Rusu
Published: April 2024

Voici une petite expérience que nous avons tentée, en nous inspirant de mots-clés des auteur.e.s de cette section qui nous semblaient avoir des résonnances les uns avec les autres, comme un écho une connexion « comme la réverbération de ta mort lointaine ». (Miron, 1971).
Les correspondances
Authors: Langevin Ève Marie
Published: April 2024

Liminaire
Musique, l’art d’exister
Authors: Orlovsky Anatoly
Published: April 2024

Éditorial
Un autre monde est nécessaire. Ensemble, il devient possible. Retour à un temps d’activisme des gauches
Authors: Seleanu André
Published: April 2024

Reprise des reportages sur le Forum social mondial de Porto Alegre du 31 janvier au 5 février 2002.
Deconstructing a Janamsakhi Illustration:
Authors: Panjwani Priyanka
Published: April 2024

It is rightly said that “All art is in part about the world in which it emerged.” As part of a North Indian hagiographic manuscript written in the 19th century, the miniature painting analyzed in this essay depicts a miracle of the founder of Sikhism-Guru Nanak. This essay will deconstruct the visual elements in the watercolor painting and link it to different styles of miniature painting of that period. It will also attempt to answer a fundamental question formulated by French art historian and archaeologist Oleg Grabar– can a work of culture be meaningfully understood through the application of techniques developed outside of it? The dynamism of icons and symbols due to cross-cultural influences is evident through this investigative process.
Fabric of Faith: Faith in Conservation
Authors: Jaspal Namita
Published: April 2024

This paper describes methods of cleaning, mending and display for preserving historical objects of clothing. The examples used in the paper are garments worn by the sixth Guru of the Sikhs, Hargobind Singh ji, and 18th century Sikh leader Banda Singh Bahadur.
Identification of Deforestation in Protected Forest Areas Using Land Cover mapping (A Case Study of Bukit Suligi Protected Forest)
Authors: Salman Sahuri  , Fajrin  , Fikri Saiyidinal , Fikri Defwaldi , Armi Ilham
Published: April 2024

In order to identify deforestation in Protected Forest Areas, land cover mapping has been used as a relevant method. This research aims to identify and map deforestation rates around the Bukit Suligi Protected Forest Area, as well as changes in land cover classes that occurred during the 2015-2022 period. The results showed that the deforestation rate reached 1,362.55 hectares per year or about 10.45% per year, a very alarming figure. This indicates a serious threat to forest sustainability and biodiversity in the area.
Electricity Productivity Analysis of Thin Solar Panels
Authors: Alfandi Alfandi Ramadhan , Dewi Arfita Yuana , Putra Andi Muhammad Nur , Bandri Sepannur , Erhaneli
Published: April 2024

The requirement for electrical energy is anticipated to witness a 70% increase between the years 2000 and 2030, owing to the inevitable population growth that will consequently lead to a surge in electricity demand. To ensure an adequate supply of electrical energy, one can harness the potential of abundant energy sources, such as solar energy, which can be converted into electrical energy. Solar energy offers numerous advantages, including its environmentally friendly and clean nature, as well as its ability to avoid air pollution. The prevailing types of solar panels, namely polycrystalline and monocrystalline, are widely utilized, despite their considerable weight. However, in the future, the development of thin solar panels is expected, primarily due to their lightweight nature, which renders them suitable for a wide range of electronic devices. The objective of this study is to analyze the power productivity generated by thin solar panels. During sunny weather, the first thin solar panel generated power ranging from 0.87 watts to 15.60 watts, with the lowest value recorded as the minimum and the highest value documented as the maximum. Furthermore, under both sunny and cloudy weather conditions, the power generated ranged from 0.52 watts to 11.17 watts, with the lowest and highest values representing the minimum and maximum power outputs, respectively. Finally, during cloudy and rainy weather, the power generated ranged from 0.21 watts to 4.72 watts, with the lowest and highest values representing the minimum and maximum power outputs, respectively. This discrepancy can be attributed to the optimal absorption of power by thin solar panels under sunny weather conditions.
Identification of Groundwater Potential Based on Remote Sensing and Geographic Information Systems in The City of Padang
Authors: Wahyu Pratama  , Dwi Marsiska Driptufany  , Defwaldi  , Fajrin  , Ilham Armi
Published: April 2024

Water is a basic need for living creatures, including humans. The need for water can be obtained from various sources, including: rainwater, surface water, or groundwater. The estimated quantity and distribution of water on earth is 97% of the water on earth is in the sea and the remaining 1.7% is at the earth's poles in the form of ice, 1.7% is underground water and only 0.1% is as water. surface and atmosphere. Padang City still lacks clean water, because Padang City PDAM water often experiences problems. So many people use drilled wells or dug wells. Therefore, it is very necessary to identify groundwater in Padang City. Identification of Padang City's groundwater potential in this research uses Remote Sensing data and Geographic Information Systems. The Geographic Information System application is used to identify groundwater potential through overlaying a tiered quantitative method on the parameters of vegetation density, land cover, soil texture, rock type, rainfall and slope to obtain the distribution of groundwater potential. The results of this research are that the groundwater potential in Padang City consists of several classes, namely no potential, low, medium and high. Groundwater potential in Padang City is dominated by low groundwater potential covering an area of 37,369,903 Ha, medium area covering an area of 25,159,745 Ha, high potential covering an area of 7,493.06 Ha and no potential area covering an area of 113,030 Ha. Based on validation using data from 59 drilled wells in Padang City which was overlaid with a groundwater potential map for Padang City, it was found that 11 (18.65%) drilled wells were not suitable and 48 (81.35%) drilled wells were suitable.
Spatial Dynamics of Rice Plant Health in Kerinci District Using Remote Sensing Data
Authors: Delvina Delvina Audina Fadli , Fajrin  , Fikri Saiyidinal , Driptufany Dwi Marsiska , Defwaldi
Published: April 2024

One many districts sustain enhancement production rice in Jambi Province is Regency Kerinci. However if seen from amount production paddy, in the Regency Kerinci experience decline, based on data from Regency BPS Kerinci seen that amount production rice is unstable. Therefore it needs to be done monitoring to plant rice. Monitoring plant paddy can done through image remote sensing. Objective from this research, namely detect and analyze level health plant paddy quickly by using NDVI and NDRE parameter indices as well showing connection between health plant rice in quantity production rice in the Regency Kerinci . From the NDVI calculation it states that in 2018 the plants rice is in very good condition with an area of 11409.8 ha, in 2019 plants rice in condition well with an area of 10028.59, in 2020 plants rice in condition well with an area of 8382.77 ha , while in 2021 plants rice in condition both with an area of 9536.74 ha. Based on results NDRE calculation in 2018 crops paddy declared unhealthy or plant immature rice with an area of 8212.22, in 2019 plants unhealthy rice with an area of 7430.7 ha, in 2020 plants paddy declared healthy with an area of 6746.78 while in 2021 plants paddy declared unhealthy with an area of 13,392 ha. Multiple linear regression results showing coefficient determination of 0.814, that is that NDVI variable and NDRE variable simultaneous influential to variable amount production paddy amounting to 81.4%.
Efectividad del entrenamiento de atletismo en las capacidades físicas condicionales de los niños y adolescentes
Authors: Toledo Sánchez Marisol , Mato Medina Oscar Enrique , Prieto Noa Juan , López Pérez Juan Pablo
Published: April 2024

Athletics training allows the development of conditional physical capacities, influences the mastery of skills and their effectiveness in play and competition. For this reason, it is essential to develop conditional physical capacities in childhood and adolescence. In this process of sports initiation, the development of conditional physical capacities plays a fundamental role in the training of future athletes, as well as in their physical performance. Therefore, an investigation was carried out in which it was motivated to strengthen the conditional physical capacities in a group that trains athletics in the University Gymnasium, which are made up of a population of 21 subjects, children and adolescents of both sexes, with ages of 6 to 15 years, who worked for 4 months for 5 days a week. The verification raised in this research, when applying an exercise program for the effectiveness of athletic training in conditional physical capacities, there were significant differences between the results of the second test compared to the first in the categories of speed, abdominals, squats and throwing ball. This makes it possible to ensure that the applied program was successful and that the values of the second test were improved in relation to the first and that the alternative hypothesis is accepted that a program of athletic training exercises facilitates the improvement of conditional physical capacities.
Comportamiento de la fuerza explosiva en las karatecas de la categoría 11-12 años en Cienfuegos
Authors: Suárez Calderón Aliuska , Enrique Melián Yovanny , Naranjo Lobaina Amanda
Published: April 2024

Karate-Do is a martial art and it needs the explosive force that allows the execution of most of the movements of the karatecas, this must be trained because explosive actions are carried out in Kumite (hand-to-hand combat) and in kata (imaginary combat). This article aims to assess the behavior of explosive force in karate men of the 11-12 year old category in Cienfuegos. Different methods were applied, including statistical-mathematical and document analysis, with the revision of the Karate-Do Athlete's Comprehensive Preparation Program. Two measurements related to the behavior of the explosive force were carried out, through the variables: offensive and defensive movements, tractions and plates, this allowed to improve the sporting results in athletes of that category, expressed in higher indexes of the explosive force.
USE OF Prunus armeniaca L. SEED OIL AND PULP IN HEALTH AND COSMETIC PRODUCTS
Authors:   Iğdır University Vocational School of Technical Sciences, Iğdır, Türkiye, Karadağ Musa
Published: April 2024

Apricot (Prunus armeniaca L.) is grown at high altitudes. Apricot is a stone fruit that can grow at an altitude of 1000-2700 m (Khursheed et al., 2020). Apricot is widely used in the cosmetics industry, pharmaceutical industry and food industry. Apricots are valuable sources for functional foods and nutraceuticals. Apricot kernel and pulp are rich in polyphenols, fatty acids, carotenoids, minerals, vitamin A, ascorbic acid, thiamine, riboflavin, niacin and pantothenic acid and ascorbic acid. It also contains microelements such as Zn, Ca, Cu, Fe, Mg, Na, Mn, P and K. Apricotoil-based massage cream, moisturising cream, bleaching cream and skin mask are produced from apricot kernel pulp, contributing to recycling. In order to extract oil from apricot kernel, oils are extracted by cold press method. For the extraction of bioactive compounds from apricot kernels, various techniques such as solvent extraction, ultrasonication, enzyme assisted, microwave assisted and aqueous extraction are used. In general, our findings indicate that apricot kernels are a valuable source of oil with potential applications in food and cosmetic industries.
A case report of HER 2 positive vulvar extramammary Рaget disease
Authors: Rykov I. V. , Kushniruk E. K. , Raskin G. A.
Published: April 2024

The low incidence, nonspecific clinical picture and absence of pathognomonic symptoms of vulvar adenocarcinoma make primary diagnosis very difficult. It could take months from the appearance of first symptoms to the final diagnosis and the start of specific treatment.

There are limited options of standard treatment for this pathology. Therefore, attempts to use therapy that has proven itself in the other malignant tumors, based on molecular biological characteristics, are promising.

Overexpression of HER2, which plays an important role in the carcinogenesis processes, is often observed in cases of extramammary Paget’s disease. We report a case of extramammary Paget’s vulvar cancer treated with a combination of cytostatic and targeted anti-HER2 agents.
Leukoencephalopathy is a rare complication of PD1 inhibitor therapy
Authors: Zhukova N. V. , Ovsyanikov V. V. , Antimonik N. Yu. , Morozova A. S.
Published: April 2024

The indications for immunotherapy are expanding every year and the therapeutic algorithms for most types of solid tumors are steadily evolving towards the wider and earlier use of immune checkpoint inhibitors (ICI). However, everything has its price, and along with the treatment response, this class of drugs has brought a number of peculiar autoimmune complications associated with ICI and called immune-related adverse events (irAEs). Taking into account the peculiarities of the mechanism of action, the range of complications of this therapy is limited only by the list of structures and tissues of the human body. A special place is occupied by neurological adverse events due to their diversity, complexity of diagnosis requiring multidisciplinary approach, and relatively low prevalence.

The purpose of this work is to describe the peculiarities of the course and diagnosis of leukoencephalopathy on the background of skin melanoma treatment with the use of checkpoint inhibitors. A clinical case of a patient with melanoma IIC who developed retrograde amnesia and convulsive syndrome on the background of immunotherapy is presented. On the basis of clinical picture and examination data the diagnosis of «leukoencephalopathy» was established. Any organs and systems can be affected during the whole period of ICT treatment. Clinicians should keep in mind the possibility of leukoencephalopathy development after the start of this therapy.
Lymphoproliferative disease: could they be localized in the pancreas?
Authors: Dinikin M. S.
Published: April 2024

Primary involvement of the pancreas in non-Hodgkin’s lymphoma is very rare. The symptoms of the tumor are nonspecific, and the results of instrumental diagnostics are often similar to pancreatic adenocarcinoma. Considering the fundamental differences in approaches to treatment and prognosis of these diseases, making an accurate diagnosis is only possible through morphological examination of tumor tissue samples. The difficulty of collecting a sufficient number of tissue samples, especially for immunohistochemical analysis, and the need for repeated tumor biopsies, in some cases lead to unnecessary surgical interventions.
Applying lean in aerospace manufacturing for waste reduction
Authors: Habib Md Ahsan , Asmatulu Eylem , Rahman Muhammad M.
Published: April 2024

Lean manufacturing shows significant promise for addressing various simultaneous, competitive demands, including high process and merchandise quality, low cost, and reductions in lead times. These requirements have been found within the aerospace sector, and efforts are now well established to implement lean practices. Although lean manufacturing was originally developed for the automotive industry, aerospace manufacturing industries have found that these lean principles can also be applied in this high-precision industry to improve production efficiency significantly. In this paper, the main objective is to provide background on lean manufacturing, present a summary of potential wastes and introduce the tools and techniques that are used to transform the industry into a high-performing lean enterprise. The method applied in this article is divided into three major parts. Firstly, define lean manufacturing and lean cycle for the aerospace sector. Secondly, examine lean implementation in the aerospace manufacturing sector. Finally, discuss the lean action plan in the aerospace sector. The goal of lean implementation in the aerospace sector is to construct a learning organization and achieve continuous improvement. Thus, the aerospace manufacturing suppliers can increase their competence within the present competitive market.
The use of machine learning for electrical component end-of-life predictions
Authors: Rust Ryan , Elshennawy Ahmad
Published: April 2024

Diminishing Manufacturing Sources and Material Shortages (DMSMS), also referred to as obsolescence, is a sector of product sustainment that is receiving more attention as certain technologies continue to have longer and longer system life cycles. Much of the research today points towards a need for better electrical component end-of-life (EOL) predictors. A small-scale case study was performed to explore the use of machine learning for obsolescence forecasting of flash memory chips. The Random Forest classification algorithm was able to predict the Active vs. Obsolete status in both the training data and the test data with an OOB error rate of 10.87%. The Random Forest regression algorithm was able to predict an obsolescence date of an obsolete component on average 0.75 years after the actual discontinuation of the component and 1.08 years for active components. The regression analysis had an overall error rate of 0.53%. This study demonstrates opportunities and challenges for using machine learning as a future DMSMS forecasting tool.
Comparing the regional and international accreditation programs of NCAAA and ABET for undergraduate engineering education evaluations
Authors: Alarifi Ibrahim M. , Rahman Muhammad M. , Asmatulu Ramazan
Published: April 2024

This research study was focused on the accreditation of a local university and its programs during the 2017-2018 and 2018-2019 periods. Accreditation requires that the university be under the consideration by an autonomous agency for the quality assurance. Accreditation can be done for the entire institution or for individual programs within an institution. Accreditation is a voluntary process that many institutions go through with multiple steps. Usually, universities request accreditation agencies to assess their programs, faculty, and students' achievements to establish if they meet the quality requirements every six years. When requirements are met, the organization is regularly reassessed and accredited to make sure that the whole body persists in meeting the standards. Majmaah University (MU) of Saudi Arabia has been recently prepared for both regional (National Commission for Academic Accreditation and Assessment - NCAAA) and international (Accreditation Board for Engineering and Technology - ABET) accreditation programs. Most of the undergraduate engineering teaching programs were certified by both NCAAA and ABET. These accreditation programs have mainly similar outcomes although there were some small variations. This study provides the details on the similarity, differences, strengths, and weaknesses of the two accreditation systems and the required documentations to meet the accreditation criteria and demands.
Item Theoretical study on instability of the base solutions of Lorenz system via Ordinary Differential Equations
Authors: Davani Sina , Asmatulu Ramazan
Published: April 2024

The Lorenz system is well-known for producing chaotic solutions for a particular range of technical systems and process characteristics. To examine the instability, fluctuation parameters in the form of exponential functions are introduced to the base solutions of the ODEs, and numerical and computational methodologies are used to determine the range of values that cause instability under different conditions. This paper will focus on the Lorenz system's instability of Ordinary Differential Equations (ODE) that regulates the thermal-hydrodynamic behavior of a two-dimensional fluid layer which is equally warmed (distributed) from bottom to top. The boundary layer of instability is also examined and compared with numerical and computational methods, and the accuracy of the solutions is thoroughly investigated. The study will give considerable insight into the requirements for stability of numerous technical systems such as DNA analysis, chemical reactors, thermosyphons, Malkus waterwheel, electric circuits, DC motors, pipelines, and power generation using micro as well as nanoscale techniques.
Real-time kinematics directed swarm robotics for construction 3D printing
Authors: Wang Darren , Zhu Robert
Published: April 2024

Architectural advancements in housing are limited by traditional construction techniques. Construction 3D printing introduces freedom in design that can lead to improvements in building design, resource efficiency, and cost. Designs for current construction 3D printers have limited build volume and, at the scale needed for printing houses, transportation and setup could become issues. This work is an exploration of and proposal for a swarm robotics-based construction 3D printing system that could bypass these issues. In this system, a central computer will coordinate the movement and actions of a swarm of robots which are each capable of extruding concrete in a programmable path and navigating on both the ground and the structure. The central computer will create paths for each robot to follow by processing the G-code obtained from slicing a CAD model of the intended structure. The robots will use readings from real-time kinematics (RTK) modules to keep themselves on their designated paths. The current progress in hardware and software is available on GitHub for collaborative development of this proposed approach towards construction.
A virtual STEM outreach program for elementary and middle school students during COVID-19
Authors: Shen Anthony
Published: April 2024

Gender inequality has been a persistent problem in higher education and industry in the STEM fields in the United States. While progress has been made in the last decade, there is a potential for increasing inequality in the time of COVID-19 with the inability to engage students in a face-to-face forum. In order to introduce elementary and middle school students to robotics and STEM, a monthly, virtual online outreach curriculum, mostly led by female students has been developed to stimulate student excitement and encourage girls to get involved in the fields of science and technology. Robotics is used as a conduit to teach and stimulate interest in STEM. A fun, hands on, and interactive curriculum for a series of educational online workshops has been developed, covering the engineering design process, competitive robotics, 3D CAD tutorial, programming, and robot mechanics. Our findings suggest that in elementary school, girls and boys are approximately equally interested in STEM. The outreach workshop appears to be a useful way to encourage and engage boys and girls in STEM virtually during COVID 19.
Analysis of Elementary School Students' Mathematical Literacy Abilities Through Diagnostic Assessments Based on Metacognitive Abilities at Field Experience Practice In-Service Teacher Professional Program
Authors: Tarusu Deysti T. , Makawawa Junita C.
Published: April 2024

The importance of the relationship between mathematical literacy skills and higher-order thinking skills is in line with the 3 competencies needed in the 21st century. Mathematical literacy skills are very important for students to understand the function of mathematics in everyday life through the formulation, use, and interpretation of mathematics in various contexts. This research aims to analyze and describe the mathematical literacy abilities of elementary school students through diagnostic assessments based on metacognitive abilities at PPL PPG Daljab. The type of research used in this research is descriptive qualitative with research subjects of 60 elementary school students who were reviewed through a diagnostic assessment based on metacognitive abilities. data collection through test results and questionnaire results. Data reduction, data presentation, and conclusion drawing are carried out in data analysis. The research results obtained are that applying innovative learning models or methods can improve and develop the mathematical literacy skills of elementary school students, especially class V. So, teachers need to familiarize students with working on story problems, especially open-ended type story problems, and innovate in learning to motivate them. students to be actively and directly involved in the problem-solving process so that they can improve students mathematical literacy skills.
Determination of Phenolic and Flavonoid Content in Ziziphus Jujuba Mill. Fruit Collected from Farah Province, Afghanistan
Authors: Ayoubi Rabia , Foladi Mohammad Musa , Lutfi Salma , Zhakfar Aqa Mohammad
Published: April 2024

The fruit of jujube (Ziziphus jujuba Mill.), a member of the Rhamnaceous family, is a valuable exporting dry fruit of Afghanistan. The plant is found in some provinces of the country, but Farah province produces it more. The purposes of this study were to standardize the jujube fruit collected from Farah Province and to determine the amount of its phenolic and flavonoid contents. Jujube fruit (JFs22) was collected from medicinal plant sellers in Kabul. After identification and pharmacogenetic evaluation of JFs22, the amount of phenolic and flavonoid content in the fruit was determined using UV-Vis spectroscopy. The test sample was Ziziphus jujuba. The JFs22 had 10.27±0.532% foreign matter, 4.58±0.33% moisture, 1.97±0.09% total ash, 0.26±0.04% acid insoluble ash, 50.69±0.30% water soluble extractive content, and 24.93±0.59% methanolic extractive value. The JFs22 had flavonoids, alkaloids, tannins, phenolic substances, saponin, and mucilage as its active ingredients. The total phenolic (TPC) and total flavonoid (TFC) contents of the methanolic extract of JFs22 were 9.84±1.65 mg gallic acid equivalent (GAE) and 0.55±0.04 mg rutin equivalent (RE) in 3 grams of dry fruit weight, respectively. Although in most of the cases, the values obtained from the pharmacogenetic evaluation of JFs22 ​​were lower than the standard, nevertheless, they are within the standard range available in pharmacopeias, and this may be considered a good quality of tested jujube fruit and notice for paying much attention for its processing. The determination of TPC and TFC of JFs22 showed that the Farah province jujube fruit has many polyphenols.
Effect of Pure Corn Oil on Growth Performance of Japanese Quail (Coturnix Coturnix Japonica)
Authors: Sangary Mohammad , Olfat Ghulam Haidar , Safi Mohammad Asif , Neyazi Abdul Jawid
Published: April 2024

In recent years, consecutive research has been conducted on the nutrient requirements of the quails to find an optimum and affordable legitimate growth promoter. Different types of vegetable oil have been tested so far. This study aimed to evaluate the effects of pure corn oil (PCO) on growth performance and live body weight gain in Japanese quails. A total of 80 four-day-old quail chicks were divided into two groups: control (20 checks) and experimental (60 checks). The experimental group was subdivided into three subgroups (G1, G2, and G3) of 20 chicks per group. All the control and experimental group chicks were fed a commercial grower quail diet in all three growth phases. Despite the commercial diet, the G1, G2, and G3 experimental groups were fed 1, 3, and 5% PCO, respectively. The values for live body weight did not significantly change after adding PCO to the quail’s diet. According to the study's findings, adding PCO to the commercial diet of Japanese quails in various amounts had no beneficial effects on feed consumption and growth rate. Additionally, it had an insignificant (p>0.05) detrimental impact on the growth performance of the quails compared to control groups. In conclusion, we can say that adding PCO to quail's commercial diet in the hot months of the year under Afghanistan's climate has no positive impact on growth and further slows down the rate of body weight gain.
Analisa Penerapan Metode OCRA Pada Pertukaran Mahasiswa Dalam Mendukung Kampus Merdeka Dengan Pembobotan ROC
Authors: Siregar Tesa Aurelia
Published: April 2024

The independent campus is one of the programs from the policy of the ministry of education and culture that has been approved by the president to motivate students to improve their abilities by participating in learning activities carried out for one or up to three semesters according to interests outside the study program or college, where students follow the lesson. However, in the selection of student exchanges in support of independent campuses, there are often problems, namely the student section is confused in determining it because of the large amount of data that does not meet the criteria but has already registered. So in this study, a decision support system is needed as a system for determining eligible students in an independent campus exchange. As for the selection of student exchanges in supporting an independent campus, there are five criteria including GPA, non-academic achievements, skills, ethics and academic sanctions. So with this, a decision support system is urgently needed to solve problems using the ROC (Rank Order Centroid) and OCRA (Operational Competitiveness Rating Analysis) methods which will produce weight values ​​for each criterion and preference values ​​from the first ranking alternative. So that the chosen one in the selection of the independent campus student exchange is Alternative A1, namely Tasya Salsabilla with a value of 1,071.
Memprediksi Produksi Boba Di Xing Fu Tang Di Centre Point Mall Medan Mengguanakang Metode Fuzzy Mamdani
Authors: Sanjaya Roma
Published: April 2024

PT. BOBA BAHAGIA MEDAN or known as XING FU TANG is an outlet that sells BOBA drinks, after the success of its first grand opening in 2018 last year at Lippo Plaza Mall Medan. Now it has several outlets in Medan Malls, one of which is at Center Point Mall Medan. With sales that can be said to be quite busy at one of the outlets in Center Point Mall Medan. Of course it is very interesting to do research with the title "Predicting BOBA Production at XING FU TANG CENTER POINT MEDAN Using the Fuzzy Mamdani Method". Having a problem formulation such as in determining the amount of Boba production in accordance with sales every day. The purpose of this study is to find out how the predictions for producing boba are in accordance with sales and existing stock of goods, so that there is no overstock of boba. This study uses the library method, observation and direct interviews with the management of Xing Fu Tang Center Point Mall Medan. The existing data sources were obtained directly from the company where the research was conducted. And the data was analyzed using the Mamdani Decision Support System and Fuzzy Method. The theoretical basis used in this study is to describe theories related to Decision Support Systems and the Mamdani Fuzzy Method. From the research conducted, it can be concluded that Xing Fu Tang Center Point Mall Medan is very concerned about producing Boba so that there are no mistakes and excess stock which can be very influential for the company, because Boba that has been produced must be sold immediately and cannot stay overnight because it will affect the taste. the taste of boba itself and the fatal thing is that it can cause losses to the company
Analisa Aplikasi Keluhan Pelanggan Pada Pt Pln Ulp Medan Selatan Dengan Metode Servqual
Authors: Situmorang Cathrin Desri Natalia , Sihaloho Dumariana
Published: April 2024

PLN (Persero) is a state-owned organization owned by the majority of the public that has the capacity as a provider of electricity frameworks spread throughout Indonesia. The most common way to check customer complaints is by using the website in particular to provide information. Where this takes a few minutes to take care of customer complaints more quickly and accurately. So it can contribute with information to utilize websites that make information more coordinated with PCs which makes it easier to track information, process information, and report customer complaints quickly. This exploration provides an outline of the timeliness spent on filing customer complaints by utilizing a website-based framework. With this website-based framework, it will facilitate the process of inputting data for a more accurate information so that it can work in the most common way of finding and providing clearer information and all the data is more accurate, it can be formed according to customer wishes. One of the methods that can be used to measure customer complaints is the servqual method. This method makes a thorough evaluation of customer complaints,. The evaluation is completed in 5 components of administrative quality, namely: Tangibles (direct evidence), Reliability (reliability), Responsiveness (responsiveness), Assurance (assurance), Emphaty (attention). Customer dissatisfaction exists due to an imbalance between customer expectations and perceived service performance.
Analisis Perbandingan Kompresi File Audio Menggunakan Algoritma Shannon Fano Dengan Algoritma Fibonacci Code
Authors: Simanjuntak Sari Magdalena
Published: April 2024

Compression is a technique used to reduce the size of the data that serves to reduce memory capacity and speed up the data transfer process. In this study, the method used is the Shannon Fano method and the Fibonacci Code. In the Shannon Fano method the compression process is carried out by knowing the frequency of occurrence of each symbol which will then be sorted from the largest to the smallest frequency, while the Fibonacci Code method uses the Fibonacci integer series to encode the bit value of the data or file to be compressed. The file to be compressed is an audio file with an MP3 extension, to perform compression in reducing the size of the audio file, the technique used is lossless. Lossless technique is a compression technique that can restore compressed files converted to their original form (decompression). The algorithms used in file compression both use lossless techniques. Files that have been compressed using the Shannon Fano and Fibonacci Code methods will be compared to find out which method is more efficient in compressing audio files. The results showed that the method of Shannon Fano and Fibonacci can compress audio files. Based on the analysis of the compression ratio results generated using the Shannon Fano algorithm, there was a 69% change using 48 data samples, while the compression ratio results generated using the Fibonacci algorithm experienced a 66% change using the same 48 data samples as the Shannon Fano algorithm