bluuebunny/crossref_metadata_2025 huggingface dataset:
Reinforcement of concrete with composite materials based on fiberglass
Authors: BENZERGA Ahmed Lamine , AMIEUR Mohamed , RABEHI Rachid
Published: May 2023

Many existing constructions (old and new) have significant deficiencies in terms of load-bearingcapacity which, in some cases, could jeopardize the safety of their users. Indeed, we can consider that thesestructures have arrived (or will arrive very soon) at the end of their useful life, hence the need to findtechnical and economic solutions to rehabilitate them in the most effective way possible. In the case ofreinforced concrete bridges, very many suffer from an advanced state of degradation caused by prolongedexposure to an aggressive environment or even a continuous increase in use loads. In addition, for the oldstructures, the technical standards used for their design and dimensioning had to be modified from the dateof their construction. Thus, certain structural elements in service no longer meet the performancerequirements in terms of response to loads. Indeed, it is often less expensive to reinforce the structuralelements of structures than to carry out a complete reconstruction, especially since following the evolutionof technology, several methods of reinforcement remain available on the market and with prices more andmore competitive, including that which consists of the external reinforcement of reinforced concreteelements with composite materials which, due to their strength/weight ratio and their resistance to externalagents (non-corrodible product), have very interesting advantages if they are compared to steel whether itis used passively or actively (simple reinforcement or prestressed). In addition, these composite materialscan be used both for shear and bending reinforcement for beams and for column containment. This workaims to use (FRP) Fiber Reinforced Plastics (materials generally formed of two main and distinct elements:the fiber "made from Glass" and the matrix "an epoxy resin which allows the transfer of loads between thefibers which improves the properties, in the long and short term"), to assess the influence of glass fibers onthe general behavior of concrete, in particular on its resistance, its deformations and its ductility. The resultsobtained at the end of the cyclic loading tests of the specimens confirm the importance of the contributionthat the confinement of the concrete specimens by FRP can bring in terms of resistance to compression anddeformation observed following the realization of the static loading tests. However, these cyclic loadingtests of the specimens show us the very considerable gain in the ability of the specimens to withstandloading-unloading cycles.
Makine Öğrenmesi Algoritması ile Çanakkale İlinin Güneş Işınım Şiddetinin Analizi
Authors: TEKTAŞ Necla , KORKMAZ Ebru
Published: May 2023

Geçmişten günümüze ülkelerin gelişimi için en önemli etmenlerden biri enerjidir. Yenilenebilir veyenilenemez enerji kaynakları bakımından zengin olan ülkeler hem sanayi de hem de turizm degelişmişlerdir. Ülkemiz güneş, rüzgâr ve biyokütle enerjisi gibi yenilenebilir enerji kaynaklarına uygun birbölgede yer almaktadır. Bu nedenle son yıllarda güneş enerjisi, rüzgâr enerjisi, biokütle enerjisi birçokyatırımcının ilgi odağı olmuştur. Yatırımların doğru yerde olması için araştırma, tahmin, sınıflandırma gibiistatistiksel analizler yaparak uygun bölge ve illeri belirlenmesi önemlidir. Bu çalışmada Çanakkale ilineait güneş enerjisine ait güneş ışınım şiddeti için makine öğrenmesi yöntemleri ile yatırımcılar için önçalışma amaçlanmıştır. Bu nedenle 2015-2019 yılları için güneş enerjisinden elde edilen güneş ışınım(günlük/saatlik) verileri kullanılarak Matlab programı aracılığı ile makine öğrenmesi algoritmasındasınıflama analizi dört temel algoritma ile Karar Ağaçları, Standartlaştırılmış Değişken Mesafeler, En YakınKomşu Algoritması, Naive Bayes yapılmıştır. Yapılan analiz sonucuna göre güneş ışınım verilerindemakine öğrenmesi algoritmasının sınıflama yöntemlerinden karar ağaçları algoritması ile daha iyi sonuçlarelde edilmiştir.
ZnS İnce Filmlerinin Termiyonik Vakum Ark (TVA) Tekniği İle Elde Edilmesi ve Optik ve Yüzey Özelliklerinin İncelenmesi
Authors: Elmas Saliha
Published: May 2023

Çinko sülfür (ZnS) yarı iletken ince filmleri, mikroskop camı ve polietilen taraftalat (PET) alttaşlarüzerine eş zamanlı olarak Termiyonik Vakum Ark (TVA) tekniği ile depolanmıştır. Depolanan ZnS incefilmlerin optik ve yüzey özellikleri incelenmiştir. ZnS ince filmlerin kalınlıkları cam ve PET alttaşlar içinsırası ile yaklaşık 510 ve 155 nm olarak ölçülmüştür. İki farklı alttaş üzerinde depolanan ZnS ince filmlerinkırılma indisi (n) ve yansıma (R) değerleri dalgaboyunun bir fonksiyonu olarak spektroskopik yöntemlerile belirlenmiştir. Cam ve PET alttaşlar üzerine depolanan ZnS ince filmlerinin direk bant geçişine sahipyasak enerji aralığı değerlerinin ise sırasıyla 3,44 ve 3.32 eV olarak hesaplanmıştır. ZnS ince filmlerininyüzey özellikleri incelendiğinde ise filmlerin yüzeylerinde boşluk ve çatlakların olmadığı, pürüzsüz vehomojen bir yapıya sahip olduğu görülmüştür.
The importance of classification in reducing the congestion price in peerto-peer energy trading
Authors: Hanari Amir , Baysal Mustafa
Published: May 2023

Peer-to-peer energy trading is a model in which energy can be exchanged directly betweenenergy producers and consumers. This model offers an innovative approach to energy markets. Intraditional energy trading models, energy producers collect energy at a single point and then distribute it toconsumption points. However, with peer-to-peer energy trading, energy producers can offer energy directlyto consumers, thus reducing the costs of intermediaries and distribution networks. [1], [12]The importance of the peer-to-peer energy trading model comes from several aspects: Energy Efficiency,Renewable Energy Incentives, Flexibility and Reliability etc.Peer-to-peer energy trading allows the energy system to become more decentralized and more sustainable.However, an appropriate classification and regulation is necessary for peer-to-peer energy trading to workeffectively. [2]The most important of these classifications is the distance category. Distance and peer-to-peer energytrading offers a new paradigm for efficient and sustainable energy distribution. Compared to traditionalenergy distribution models, this new approach allows energy consumers to exchange energy amongthemselves. This aims to provide a more flexible, efficient, and environmentally friendly energydistribution. [3], [13]In this study, I made simulations to see how the distance could have an effect on the energy trade betweenpeers, and as a result of the simulations, the distance and arrangement of consumers from each other wasexamined. As a result, the regulation of consumers has proven to have an effect on trade, and theclassification of consumers shows that it has a large effect on lowering the congestion price.
LINGUISTIC PROBLEMS IN THE TERMINOLOGICAL LEXICION OF INFORMATICS IN THE ALBANIAN LANGUAGE
Authors: STRORI ESMERALDA
Published: May 2023

The object of study included in this scientific work is the computer terminology, which ispenetrating from English language into the Albanian. During this penetration process, all the layers ofAlbanian language lexis are affected by several linguistic phenomena, such as synonymy, homonymy andpolysemy, which attract a special interest forscientific studies. These linguistic phenomena are non-positivefeatures in the field of terminology due to their confusion for the language. Also because of the violationof one of the most important basic principles of terminology - “only one meaning”, i.e. one term – oneconcept, which in relation to computer terms is almost impossible. Regarding the ongoing intensivepenetration of these terms into the Albanian language, it is necessary to translate them into Albanian andestablish its standardisation. This standardisation can be achieved only through a collaboration betweenlinguists and experts in the field of informatics. This scientific paper makes references to respective foreignliteratures accompanied with concrete examples extracted from vocabularies of informatics published in allthe Albanian-speaking territory.
Conducting polymer effects on hybrid S-rGO/CuO/polymer nanocomposites for SupercapBattery devices
Authors: Ates Murat
Published: May 2023

In this study, 3 different materials were combined to form hybrid nanocomposite forSupercapBattery applications. Sulfur (S) doped reduced graphene oxide (S-rGO), copper (II) oxide(CuO), and different conducting polymers such as polyaniline (PANI), poly(3,4-ethylenedioxythiophene)(PEDOT) and polypyrrole (PPy) were used as a one of the components of nanocomposites.Electrochemical performances were performed by cyclic voltammetry (CV), galvanostatic charge /discharge (GCD) and electrochemical impedance spectroscopy (EIS) measurements. EIS measurementswere analyzed by Nyquist, Bode-magnitude, Bode-phase, and Admittance plots. Long-term stability testswere obtained by CV method using 1000 charge/discharge performances at a scan rate of 100 mV×s-1.The highest specific capacitance was calculated as Csp= 171.63 F×g-1at 2 mV×s-1(electrode weight wasobtained as 12,8 mg) for S-rGO/CuO/PEDOT nanocomposite.
An Overview of Downhole Electrical Machines and their Benefits
Authors: Nouman Danish , Ullah Mian Farhan , Haider Syed Hammd , Keyani M. Bilal Khalid
Published: May 2023

– New technology to the deeper offshore areas and to the exploitation of deep offshore reservesand deep offshore reserves must offer safe, economically viable and ecologically acceptable solutions toincrease oil and gas recoveries. The use of electricity in downhole applications has shown to be beneficial.This article discusses the advantages of electrical machines in downhole applications that are alreadyavailable or developing. For downhole applications, permanent magnet devices are mostly used.
Gayrimenkul Değerlemesinde Yapay Sinir Ağlarının Kullanılması
Authors: SERTKAYA Cengiz , KÖSE Zekeriya
Published: May 2023

Taşınmaz malları değerleme vergilendirme, kredi gibi birçok finansal alanı ilgilendiren, önemi gün geçtikçe artan bir çalışma alanı olarak ortaya çıkmıştır. Taşınmaz değerleme gibi, sosyal ve ekonomik koşullara göre zaman içerisinde değişkenlik gösteren zor bir problemde, değerlemenin doğru ve objektif olarak yapılabilmesi için gelişmiş sistemlerin kullanımı zorunlu hale gelmiştir. Değerlemeye etki eden birçok parametrenin varlığı ve işlenmesi gereken büyük boyutta veri de göz önüne alındığında, klasik yöntemlerin aksine insan zekasına yakın yorumlar yapabilen makine öğrenmesi methodlarının kullanımına ihtiyaç duyulmaktadır.

 

Bu çalışmanın amacı, tasaruf finansmanı sektöründe faaliyet gösteren firmalar için gayrimenkul ekspertiz ve değerleme süreçlerinde kullanılmak üzere, makine öğrenmesi yöntemlerinden yapay sinir ağı tabanlı bir sistem önerisi sunulmasıdır. Önerilen sistemin değerleme sürecinde, Türkiye’de yaygın kullanılan ilan sitelerindeki gayrimenkul bilgilerinden yola çıkılarak, en doğru değerlemenin yapılabilmesi için uzmana bir karar desteği sağlaması hedeflenmektedir. Elde edilen sonuçlara göre önerilen sistemin, 0.86 ve 0.85  başarı değerlerine ulaştığını ve başarılı bir gayrimenkul değerleme sistemi olduğu belirlenmiştir.
The importance of databases in web programming
Authors: Blagojche Najdovski , Dimitrovska Gordana , Joshevska Elena
Published: May 2023

Databases are fundamental when working with web applications. The database is a place where the data which is necessary for the operation of a web application is entered, read, deleted and updated on a daily basis.  The aim of this paper is to consider the benefits of database’s implementation when it is used for data storage coming from a specific Web application. Hereof, in this paper are shown various advantages: starting from the exchange of data between the web application and the database, the security mechanisms available to the database, how to protect the data from the application stored in the database, how to confirm the identity of the user, data access etc. The subject of research in this paper is to regard more precisely the pros and cons of applying the database when it is used for storage of data coming from a specific Web application.
Circularly Polarized L-Shaped Defected Ground Antenna for WLAN Communication Systems
Authors: Çetinkaya Aynur Sena , Palandöken Merih
Published: May 2023

With Industry 4.0, the evolution of technology has accelerated. As the information shared by people has increased, homes, cities and working environments have begun to be equipped with smart systems with the requirements of the age. IOT (internet of things) is spreading around the world. As a benefit of the advantages of wireless communication, technologies that provide information transmission using radio waves have gained importance. The increasing population in the world and its direct effect on demand require factories to keep production under control. This allows for renewal in manufacturing by triggering the contemporary transformation of the world. The transfer of this data has become an important issue as well as the increase in the amount of data generated. Wireless communication is provided by using radio frequency and studies are carried out on the 2.4 GHz ISM band frequency, which is the most frequently used. In this paper, circular polarized reader antenna with resonance frequency at 2.4 GHz and gain of 4.7 dBi is proposed. Resonance frequency covered by WLAN (wireless local area network) (2.4, 2.5 GHz). Impedance bandwidth -10 dB is between the frequencies 2.28 GHz and 2.53 GHz.  The size of the designed antenna is 114mm x 65mm x 0.8mm.
EXPLORING THE LANDSCAPE OF SDN-BASED DDOS DEFENSE: A HOLISTIC EXAMINATION OF DETECTION AND MITIGATION APPROACHES, RESEARCH GAPS AND PROMISING AVENUES FOR FUTURE EXPLORATION
Authors: ALASALI Tasnim , DAKKAK Omar
Published: May 2023

Over the course of time, a multitude of security solutions have been proposed in order to safeguard the Internet architecture from an extensive array of malware threats. However, the task of ensuring the security of the Internet and its associated applications remains an ongoing research challenge. Researchers persistently delve into the exploration of innovative network architectures, such as the utilization of HTTP as the narrow waist, the implementation of Named Data Networking (NDN), the development of programmable networks, and the adoption of Software-Defined Networking (SDN), with the aim of designing a more dependable and resilient network infrastructure. Among these alternative approaches, SDN has emerged as a robust and secure solution for countering malicious activities. By separating the control plane from the data plane, SDN provides an array of advantages, including enhanced manageability, improved control, dynamic rule updates, advanced analysis capabilities, and a comprehensive network overview facilitated by a centralized controller. Despite its superiority over conventional IP-based networks, SDN is susceptible to various network intrusions and encounters significant challenges in terms of deployment. The purpose of this paper is to conduct a comprehensive review of approximately 70 prominent mechanisms employed for the detection and mitigation of Distributed Denial of Service (DDoS) attacks in SDN networks. These mechanisms are systematically categorized into four main groups, namely information theory-based methods, machine learning-based methods, approaches based on Artificial Neural Networks (ANN), and other miscellaneous methods. Furthermore, the paper identifies and discusses several unresolved research issues and gaps that exist in the deployment of a secure DDoS defense solution within SDN networks. The objective of this comprehensive review is to provide valuable insights to the research community, assisting in the development of more robust and reliable DDoS mitigation solutions that are specifically tailored for SDN networks.
An Improved Multi-Pulse Rectifier Circuit for Input Current Harmonic Suppression Using Passive Devices
Authors: Wahab Abdul , Khurshid Muhammad Ahmad , Mahmood Tahir
Published: May 2023

Renewable energy resources, such as solar and wind, are increasingly being integrated into power systems to promote sustainable and clean energy generation. However, the intermittent nature of these resources poses challenges in terms of harmonics, power factor and power quality. This paper focuses on the use of multi-pulse rectifiers (MPR) as a solution for enhancing the performance and grid integration of renewable energy resources. A novel approach is introduced, combining a phase-shifting transformer that provides a five-phase input to a series of 20-pulse rectifiers with a pulse-tripling circuit (PPTC). By modulating the resultant currents of bridge rectifiers with PPTC, the rectifier’s pulse number is raised from 20 to 60, resulting in enhanced reduction of input current harmonics. The proposed rectifier configuration achieves an input current with an approximate sinusoidal waveform, exhibiting a Total Harmonic Distortion (THD) of less than 4%. The proposed scheme offers several advantages. It is simple, utilizing only passive components without the need for active devices, making it easy to implement, improving the performance of rectifier, ensuring compliance with power quality standards, and enabling reliable operation in medium- and high-voltage electronic systems.
Assessment of Genetic variability among ethidium bromide-derived genotypes of cowpea (Vigna unguiculata (L.) Walp) at M7 generation
Authors: Ajayi A. T , Osekita O. S , Ojo T. F. , Omoniyi O. E.
Published: May 2023

An induced mutation is a valuable tool for creating new genetic variability to complement existing germplasm and broaden crop genetic base. Thus, creating genetic diversity is needed for effective plant breeding programs. This study was aimed at evaluating the level of variation of phenotypic traits among ethidium bromide (EtBr)-derived genotypes of cowpea evaluated during the dry season of 2021-2022. Six cowpea genotypes obtained from the Department of Plant Science and Biotechnology, Adekunle Ajasin University, Akungba-Akoko were used in the study. These were evaluated in a randomized complete block design (RCBD) in 3 replicates in the field. The traits measured were emergence percentage, number of leaves/plant, plant height, number of main branches/plant, number of peduncles/plant, peduncle length, pods/plant, pod length, seeds/pod, number of seeds/plant, 100-seed weight, and seed yield/plant. Upon statistical analysis, it was observed that G3 (IT98K-555-1) at a concentration of 0.5% for 16hrs was most suitable to broaden the genetic base of cowpea and can be selected for further breeding programs.
Short-Term Electricity Price Forecasting Using EEMD and GRU-NN
Authors: Chughatta Khalid Rashid , Haroon Shaikh Saaqib
Published: May 2023

A vital necessity for the reliable operation of the power system as well as for the financial well-being of the consumers is an accurate forecast of the price of electricity. The price of electricity is highly volatile, nonlinear, and subject to seasonal fluctuations. The price series is also affected by electrical market uncertainty and demand, which is strongly reliant on weather and electricity usage time. This study presents a short-term electricity price forecasting method that follows the similar days approach comprising Ensemble Empirical Mode Decomposition technique. The suggested method utilizes a feature selection methodology that combines the Random Forest Regressor and the Gradient Boosting Regressor to determine which features are most important for the machine learning model. To forecast the electricity price, a Gated Recurrent Unit Neural Network (GRU-NN) is employed as the machine learning model. The GRU-NN has the capability of accurately capturing complicated temporal relationships in electricity price time series, which enables it to make correct predictions. To evaluate the validity of the proposed method, data from the PJM electricity market have been used. The simulation results demonstrate that the suggested method is superior to the existing technique, with significantly improved values achieved for both the mean absolute percentage error (MAPE) and the root mean square error (RMSE).
Impact of the Size of Data on the Reliability of Short-Term Load Forecasting Using LSTM and GRU
Authors: Ashraf Abdullah , Haroon Shaikh Saaqib
Published: May 2023

Load forecasting has been an important aspect of power system operations and with the increase in integration of renewable energy resources in the main grid, the procedure is now more vital than ever. The methods developed to forecast the load of an area have also been improved with the use of artificial intelligence. This study proposes a forecasting training method using Gated Recurrent Units and compares it with the most widely used long-short term memory. The test systems are made of the historical load data from publicly available load data through PJM data miner 2 without the inclusion of weather parameters which reduces the training time of the models along with the reduction in data acquisition cost. The study also considers the impact of predicting future load without access to weather data.
Effectiveness of Sodium Iodide Root Canal Filling Pastes in Primary Teeth
Authors: Chang Soo Jin , Kim Yujin , Lee Junghwan , Kim Jongsoo , Lee Joonhaeng , Han Mi Ran , Shin Jisun , Kim Jongbin
Published: May 2023

Objectives: This study aimed to compare the physical properties and antibacterial effectiveness of iodoform based root filling pastes, Vitapex® and Metapex®, with sodium iodide root filling paste (NaI paste) for primary teeth. Materials and Methods: The physical properties (flowability, film thickness, radiopacity) of the pastes were evaluated according to ISO 6876:2012. The antibacterial activity against Enterococcus faecalis strain (ATCC 6538) was evaluated using a direct contact test. Results: There was no significant statistical difference (p > 0.05) observed in the flow and film thickness of NaI paste when compared to the currently available root canal filling materials. The average flow capacities for Vitapex®, Metapex®, and NaI paste were 15.40 mm, 21.25 mm, and 20.01 mm, respectively. The average film thickness for Vitapex®, Metapex®, and NaI paste were 33.3 μl, 22.6 μl, and 25.0 μl, respectively. However, NaI paste showed lower radiopacity than the existing materials, and this difference was statistically significant (p < 0.05) NaI paste demonstrated higher antimicrobial activity than the available materials, and this difference was also statistically significant (p < 0.05). Conclusion: Compared to the existing commercialized root canal filling materials, NaI paste exhibited similar performance in terms of flow and film thickness, and superior antimicrobial activity against E. faecalis . Hence, NaI paste could be a promising root filling material for primary teeth and may be a potential alternative to existing materials.
Prevalence and Patterns of Congenitally Missing Teeth among Pediatric Patients Aged 8 - 16 in Pusan National University Dental Hospital
Authors: Kim Eunjin , Park Soyoung , Lee Eungyung , Jeong Taesung , Shin Jonghyun
Published: May 2023

The purpose of this study was to investigate the prevalence and patterns of congenitally missing teeth in permanent teeth excluding third molars, in patients aged 8 to 16 years who visited Pusan National University Dental Hospital from January 2010 to February 2021. This retrospective study evaluated tooth agenesis and the pattern of missing teeth represented by the tooth agenesis code by reviewing panoramic radiographs and electronic medical records of 11,759 patients, including 5,548 females and 6,211 males. The prevalence of congenitally missing teeth was 10.74% (females 11.95%, males 9.66%, p < 0.0001). Patients with tooth agenesis had an average of 2.22 missing teeth, and congenitally missing teeth occurred more frequently in the mandible (8.39%) than in the maxilla (4.52%, p < 0.0001). The mandibular second premolar (58.19%) was the most frequently missing tooth. The second premolar was the most frequently missing tooth in all quadrants (30.10%, 31.67%, 43.14%, and 35.59%) when a single tooth was absent, while the first and second premolars were the most commonly absent teeth (11.69%, 11.47%, 5.94%, and 5.24%) when two or more teeth were missing. In the relationship between maxillarymandibular antagonistic quadrants and full mouth, the 1st to 4th place of the missing patterns were all involved with the 1st and 2nd premolars. This study can be clinically helpful in establishing a treatment plan for patients with missing teeth. In addition, it can be used as basic data for molecular biological research to find out the relationship between tooth agenesis and specific genes.
Assessment of Risk Factors for Developmental Defects of the Enamel in Preterm
Authors: Park Shang-yon , Lee Jaeho , Choi Hyung-Jun , Kang Chung-Min
Published: May 2023

This study aimed to determine the criteria for quantifying developmental defects of enamel in primary teeth in premature babies and to investigate the severity of developmental defects according to the gestational age, birth weight, systemic complications, and treatments received after preterm birth. Birth information, a history of complications, the duration of parenteral nutrition, and endotracheal intubation were investigated by retrospectively reviewing the admission and discharge records of premature babies in the neonatal intensive care unit. The Preterm Developmental Defects of Enamel (PDDE) index was designed by modifying the existing developmental defects of enamel index. Based on PDDE index, the evaluator scored developmental defects of enamel by classifying them as enamel hypomineralization and hypoplasia. The PDDE scores in the extremely preterm and extremely low birth weight groups were significantly higher than those in other groups. Furthermore, PDDE scores of premature babies with bronchopulmonary dysplasia, rickets, intraventricular hemorrhage, or necrotizing colitis were significantly higher than those in the control group. In addition, more than 50 days of endotracheal intubation and more than 20 days of parenteral nutrition were associated with significantly higher PDDE scores than those in the control group and were risk factors for developmental defects of enamel. This study provides basic information for identifying risk factors for developmental defects of enamel in premature babies.
Evaluation of Setting Time, Solubility, and Compressive Strength of Four Calcium Silicate-Based Cements
Authors: Jang Yuji , Kim Yujin , Lee Junghwan , Kim Jongsoo , Lee Joonhaeng , Han Mi Ran , Kim Jongbin , Shin Jisun
Published: May 2023

This study aimed to compare the physical properties of 4 kinds of calcium silicatebased cements (CSCs): 2 kinds of powder-liquid mix type (RetroMTA® [RTMX] and Endocem® MTA Zr [EZMX]) and 2 kinds of premixed type (Well-Root™PT [WRPR] and Endocem® MTA premixed [ECPR]) CSCs, respectively. Further, we assessed the setting times, solubility values, and compressive strengths of the cements. The shortest setting time was observed for EZMX (123.33 ± 5.77 seconds), followed by RTMX (146.67 ± 5.77 seconds), ECPR (260.00 ± 17.32 seconds), and WRPR (460.00 ± 17.32 seconds), respectively. The highest solubility was observed for WRPR (9.01 ± 0.55%), followed by RTMX (2.17 ± 0.07%), EZMX (0.55 ± 0.03%), and ECPR (0.17 ± 0.03%). Furthermore, the highest compressive strength was observed for ECPR (76.67 ± 25.67 Mpa), followed by WRPR (38.39 ± 7.25 Mpa), RTMX (35.07 ± 5.34 Mpa), and EZMX (4.07 ± 0.60 Mpa). In conclusion, the premixed type CSCs (WRPR and ECPR) exhibited longer setting times compared to the powder-liquid mix type CSCs (EZMX and RTMX). The solubility test showed that ECPR had the lowest solubility while WRPR had the highest solubility, with a statistically significant difference between them (p < 0.0083). Additionally, the compressive strength test showed that ECPR had the highest compressive strength, while EZMX had the lowest compressive strength, also with a statistically significant difference between them (p < 0.0083). ECPR is a promising material as it is premixed, eliminating the need for mixing time, and it has also demonstrated improved solubility and compressive strength, making it a potentially favorable option for clinical use.
Self-Protection Equipment Detection System in Heavy Weight Workshop of Politeknik Negeri Jakarta Using Artificial Intel-ligence
Authors: Rezakusuma Muhammad , Abdillah Abdul Azis , Liliana Dewi Yanti , Edistria Ega , Arifin Samsul , Muzakki Zahran
Published: May 2023

The creating process, how it works and the performance of the detection system using Artificial Intelligence. The development of this innovation contributes to the Heavy Equipment Workshop of the Jakarta State Polytechnic to detect the early potential for work accidents. The methods are device tuning, inputs, training models, performance, trials and outputs. The creating process and how the detection system works using Artificial Intelligence each has 3 steps and accuracy using 3 cameras, namely the internal webcam (1MP), the JETE external webcam (720P) and the Samsung Galaxy A22 mobile phone camera (13MP). The process of making this innovation has 3 steps, namely data input, export, file grouping. There are 3 steps to work, namely open the file, run and output. The result of the accuracy of the internal webcam is very low, the JETE external webcam is better than the internal webcam and the mobile phone camera is better than the JETE external webcam.
Investigation on Radiation Protection Status in Hospitals: A case study of selected hospitals in Kampala Uganda
Authors: Makumbi David ,   Kampala International University, Uzorka Afam , Olaniyan Ademola Olatide ,   Kampala International University
Published: May 2023

This article discusses a study into the radiation protection status of Ugandan hospitals. Four hospitals with diagnostic radiological capabilities were selected for this inquiry. This study used a questionnaire. The secondary objective was to increase staff awareness of potential radiation health hazards and concerns. Additionally, it was determined important to ascertain radiation workers' level of understanding on radiation protection in order to initiate the process of drafting Ugandan radiological laws, regulations, and codes of practice in this field. The study consists of 92 radiation workers. The study found an acceptable level of occupational radiation monitoring knowledge among radio-diagnostic staff in Kampala Uganda, as well as an acceptable level of radiation monitoring among radio-diagnostic staff in Kampala Uganda, though much work remains to be done on radiation protection practice, as some radiation workers' attitudes toward wearing personnel monitoring devices (dosimeters) were found to be insufficient. Several participants mentioned that their unit lacked personnel monitoring devices. The current study reveals that radiographer' current strategies for reducing radiation exposure to patients and to themselves are ineffective. As a result, corrective measures should be implemented in a systematic and consistent manner to ensure that radiation safety procedures and standards are followed appropriately in radiology departments.
School of public administration of National Leader Heydar Aliyev
Authors: Rahim Fərahim oğlu Sadıqov
Published: May 2023

The article is dedicated to the National Leader of the Azerbaijani people Heydar Aliyev, to his successful steps in the field of public administration, and its effective results. The genius architect of Azerbaijani statehood Heydar Aliyev is the founder of the scientific-practical school in the field of modern state administration. The article talks about the unparalleled services of Heydar Aliyev in the field of public administration, and discusses the philosophy of the management school he created. The theoretical and practical basis of the Heydar Aliyev's administration school is the political and economic activities and principles he carried out during his leadership in Azerbaijan. Even today, Heydar Aliyev's adminis-tration school is important for the formation and development of the young generation and their successful representation in state administration.

In the article, the main directions and priorities of Heydar Aliyev's administrative activity are analyzed, the main directions and strategic goals of his socio-economic policy in the field of public administration were scientifically and practically justified. Heydar Aliyev has always taken a comprehensive approach to the development of the country's economy, attached great importance to the development of the non-oil sector, and took successful steps in this field in the activities of state administration. Ensuring the territorial integrity of our country was the main line of his political administrative activities. This issue has always been in the center of his attention and has become the main priority of his foreign policy.
Assessment of the need and advantages of state intervention in the economy in the conditions of market economy
Authors: Habil Hüseyn oğlu Aslanov
Published: May 2023

National Leader Heydar Aliyev, the architect of independent state building in Azerbaijan, laid the foundations of the state regulation system that meets modern requirements in the economy, and in a complex situation, he formed an efficient state mechanism based on market economy principles which is completely different from the administrative-emirate system.

Independent state-building in Azerbaijan, its implementation based on the principles of market economy and the transformation of our country into an equal member of the system of international relations set very important and completely new tasks for the economy of our republic, including the system of regulating foreign economic relations.

In modern times, state regulation of the economy is not denied in any civilized country. The free market economy is not capable of solving all the social and economic problems of modern society, therefore the state's intervention in the economy becomes necessary in areas that the market economy cannot regulate. World experience shows that the state plays a decisive role in ensuring the normal functioning of every economic system. It can be said that in almost all countries, the state has the capacity to influence economic and social development to a great extent. The article focuses on the study of these and other issues.
SITE ADAPTATION DA RADIAÇÃO GLOBAL HORIZONTAL PARA ESTAÇÕES SOLARIMÉTRICAS NA ARGENTINA E NO BRASIL
Authors: Rodrigues de Miranda Diego , Soares Siqueira Costa Renan , De Castro Vilela Olga , Carlos Araújo da Costa Alexandre , Ariel Salazar Germán , Coutinho Pereira Alex , Boudoux Jatoba Eduardo , Codeceira Neto Alcides , Bione de Melo Filho José
Published: May 2023

Estimar a radiação solar incidente sobre certa localidade durante vários anos é necessário para o desenvolvimento de projetos fotovoltaicos e heliotérmicos de geração centralizada. Neste trabalho, técnicas estáticas de regressão linear múltipla, redes neurais do tipo multilayer perceptron e quantile mapping são empregadas para ajustar séries de irradiância global horizontal (GHI) de longo prazo, utilizando medições em terra, procedimento conhecido como site adaptation. São utilizadas duas estações solarimétricas, uma na cidade de Petrolina, no Nordeste do Brasil, e outra na província de Salta, no sítio de El Rosal, Argentina, como estudos de caso. Dados da Copernicus Atmosphere Monitoring Service (CAMS) e do European Centre for Medium-Range Weather Forecasts (ECMWF) são empregadas como variáveis regressoras nos modelos estatísticos. São testadas duas diferentes divisões dos dados em calibração (80% das amostras) e teste/operação (20% das amostras), uma delas realizando uma randomização temporal dos dados e a outra mantendo a componente temporal. Os resultados mostram que o site adaptation consegue melhores estatísticos para a estação de El Rosal (24,28% de nRMSD, -5,18% de nMBE e 1,00 de STDRatio), do que o modelo de referência da CAMS para GHI (34,67% de nRMSD, 19,28% de nMBE e 0,95 de STDRatio), enquanto que para a estação de Petrolina, os resultados obtidos (21,66% de nRMSD, 0,51% de nMBE e 0,92 de STDRatio) conseguiram resultados similares aos do modelo da CAMS (22,22% de nRMSD, 4,84% de nMBE e 0,98 de STDRatio); todos os estatísticos apresentados acima são para a divisão dos dados que mantém a componente temporal. Tanto para a estação de Petrolina quanto para El Rosal, os resultados obtidos com a divisão com randomização dos dados são mais acurados do que a que mantém a componente temporal.
ESTUDO SOBRE O IMPACTO DOS AEROSSÓIS ATMOSFÉRICOS NO FATOR ESPECTRAL DE MÓDULOS FOTOVOLTAICOS EM SÃO PAULO
Authors: Gustavo Bet Luis , Manuel Évora do Rosario Nilton , Ramos Martins Fernando , Zilles Roberto
Published: May 2023

A geração de energia elétrica a partir da energia solar é uma alternativa com potencial de contribuir para atender os objetivos de desenvolvimento sustentável no setor energético. A aplicação da tecnologia fotovoltaica em centros urbanos, com instalação de pequenas plantas geradoras, vem sendo amplamente apontada como uma alternativa viável de geração distribuída próximo a grandes polos consumidores. Ao mesmo tempo que a aplicação das tecnologias fotovoltaicas apresenta um crescimento contínuo, a poluição atmosférica, um problema crônico das grandes cidades, pode impactar negativamente a sua produtividade. Os aerossóis atmosféricos constituem o principal atenuador da radiação solar na ausência de nuvens em áreas urbanas, principalmente aquelas localizadas em regiões que apresentam estações secas bem definidas, como é o caso de São Paulo, dominadas por condições atmosféricas que favorecem o maior tempo de permanência na atmosfera. Os aerossóis modulam o total da irradiação solar incidente na superfície assim como alteram a sua distribuição espectral. Sendo assim, este trabalho buscou investigar como a variação na quantidade e na natureza dos aerossóis atmosféricos podem afetar o desempenho de sistemas fotovoltaicos operando na região metropolitana de São Paulo, via análise do fator espectral de módulos fotovoltaicos. A análise da série histórica das propriedades ópticas dos aerossóis possibilitou identificar a contribuição importante de aerossóis provenientes de queimadas em outras regiões do país. Associado a esse ciclo dos aerossóis, foi possível observar a mesma sazonalidade no fator espectral dos módulos fotovoltaicos de silício cristalino em operação, acarretando em uma defasagem de até 5% do desempenho espectral dos módulos. Essa variação no desempenho acompanhou os cenários atmosféricos com elevada espessura ótica dos aerossóis e vapor d’água.
SISTEMA FOTOVOLTAICO ISOLADO DE CONFIGURAÇÃO MISTA PARA FAMÍLIAS RIBEIRINHAS
Authors: Guilherme Lima Pena Allan , Ubaiara Brito Alaan , Miguel Lira Guedes Pedro , Monteiro Felipe , Barbosa Malheiros Josineide , Barbosa Malheiros Francisco , Carneiro Guedes Marcelino , Froes Dias Júnior Alcides , Ezequiel François Davi , Poganietz Witold-Roger , Jane Parmentier Mary
Published: May 2023

Um sistema fotovoltaico pode apresentar diferentes configurações dependendo do tipo de demanda que se deseja atender. Este trabalho apresenta um sistema de configuração mista que consiste na utilização do mesmo gerador fotovoltaico para alimentar um sistema fotovoltaico isolado com acumulador de energia e um de acoplamento direto. O sistema foi instalado na sede da Associação dos Trabalhadores Agroextrativistas da Ilha das Cinzas, localizada no estuário do Rio Amazonas, em Gurupá – Pará. Na Ilha, não há energia elétrica convencional e o acesso a serviços de saneamento básico é limitado. Como são sistemas com características diferentes, cada um necessita de uma configuração distintas entre os módulos fotovoltaicos. Para o sistema isolado com acumulação de energia as conexões entre os módulos são três ligações em paralelo de dois módulos em série. Para o sistema de acoplamento direto os seis módulos fotovoltaicos são conectados em série, onde os terminais são conectados a um conversor de frequência que aciona cargas que possuem motor de indução trifásico. A comutação entre as conexões ocorre de forma manual utilizando plugues e soquetes industriais tetrapolares de 32 A. Os terminais dos seis módulos fotovoltaicos foram conectados a três plugues enquanto cada sistema (de acumulação e de acoplamento direto) teve seus terminais conectados a três soquetes. De forma padrão, o gerador fotovoltaico é conectado ao sistema com acumulação de energia, garantindo energia elétrica em períodos sem incidência solar. Quando necessário, as conexões do gerador fotovoltaico serão comutadas manualmente para o sistema de acoplamento direto responsável por acionar cargas com motor de indução trifásico, seja para retirar a polpa do açaí, bombear água para um reservatório, irrigação de plantas ou outra atividade. O sistema misto obteve êxito em comutar as conexões terminais do gerador fotovoltaico de acordo com as demandas energéticas de cada sistema.
Interpretasi Data Anomali Magnetik Bawah Permukaan Area Penambangan Batuan Gamping PT Sarana Arga Gemilang KSO PT Semen Kupang
Authors: Mauribu Yantilinena , Tanesib Jehunias L.
Published: May 2023

Telah dilakukan penelitian di area penambangan batuan gamping PT Sarana Arga Gemilang KSO PT Semen Kupang. Penelitian ini bertujuan untuk mengetahui potensi batuan gamping yang ada di area penambangan batuan gamping menggunakan metode geomagnetik. Akuisisi data magnetik dilakukan dengan menggunakan Proton Precession Magnetometer (PPM) tipe GSM-19T dan diperoleh 205 titik ukur yang tersebar di lokasi penelitian. Proses pengolahan data magnetik meliputi koreksi diurnal, koreksi IGRF, upward continuation, dan pemodelan 2D. Hasil penelitiaan menunjukkan pola penyebaran anomali magnetik secara kualitatif memiliki 3 (tiga) pola anomali, yaitu pola anomali tinggi yang nilainya > 100 nT, pola anomali sedang (medium) dengan rentang nilai antara 0 – 100 nT, dan pola anomali rendah memilikiilai < 0 nT. Interpretasi kuantitatif melalui pemodelan 2D memberikan tampilan benda-benda atau batuan penyebab anomali di bawah permukaan area penambangan batuan gamping PT Sarana Agra Gemilang KSO PT Semen Kupang. Beberapa jenis batuan di lokasi penelitian didominasi oleh batuan gamping (limestone) dengan kontras suseptibilitas 0.00021 cgs unit, 0.00022 cgs unit, 0.00026 cgs unit, 0.00027 cgs unit dan 0.00028 cgs unit yang tersebar secara tidak merata hingga kedalaman 100 m. Selain itu terdapat batuan lempung dengan kontras suseptibilitas 0.0005 cgs unit, batuan metamorf jenis schist dengan kontras suseptibilitas 0.027 cgs unit dan batuan/benda diamagnetik dengan kontras suseptibilitas -0.0006 cgs unit, -0.008 cgs unit, -0.001 cgs unit, dan -0.01 cgs unit.
Interpretasi Bawah Permukaan Pulau Timor dengan Pemodelan 3D Berdasarkan Data Anomali Gravitasi
Authors: Ginya Selciana , Tanesib Jehunias L. , Sianturi H. L
Published: May 2023

Telah dilakukan interpretasi anomali medan gravitasi pulau Timor dengan pemodelan 3D untuk mengetahui batuan dasar pulau Timor. Data yang digunakan adalah anomali medan gravitasi udara bebas dan topografi Sandwell dan Smith yang telah direduksi terhadap model geopotensial bumi EGM2008. Koreksi data meliputi koreksi udara bebas, koreksi atmosfer, koreksi bouguer sederhana dan koreksi curvature. Data anomali bouguer lengkap dibawah ke atas bidang topografi dengan metode kontinuasi ke atas dengan ketinggian 25,9 km. Selanjutnya dilakukan pemodelan 3D dengan menggunakan program Grablox dan Bloxer. Hasil interpretasi kualitatif, diperoleh variasi anomali bouguer lengkap dari -160 mgal sampai 300 mgal. Nilai anomali positif lebih dari 0 mgal hingga sekitar 300 mgal. Anomali bernilai positif berada di hampir seluruh daratan pulau Timor dan sebagian di perairan laut Savu dan pulau-pulau di bagian utara pulau Timor serta di selatan perairan laut Timor yaitu setelah palung Timor, sedangkan anomali negatif kurang dari 0 mgal hingga sekitar -160 mgal berada di bagian selatan daratan Timor hingga perairan laut Timor dan sebagian besar laut Savu. Hasil interpretasi kuantitatif pada model 3D, tiap perlapisan didapatkan beberapa lapisan batuan di bawah permukaan yaitu batuan dolomit, granulit, sienit, dan batu sabak. Interpretasi data anomali gravitasi regional dan pemodelan 3D, diduga bahwa batuan dasar pulau Timor adalah batu sabak (slate) yaitu batuan metamorf yang terdapat pada kedalaman sekitar 3 km sampai 30 km.
Evaluasi Kualitas Daerah Aliran Sungai (DAS) Kali Dendeng Menggunakan Metode Indeks Pencemaran
Authors: Da Costa Madalena , Nipu Lidia Paskalia , Solo Anna Apriani Maniuk
Published: May 2023

Daerah aliran sungai (DAS) Kali Dendeng merupakan sumber daya air yang digunakan masyarakat Kota Kupang untuk berbagai keperluan seperti kegiatan domestik, petanian dan salah satunya diolah PDAM Kota Kupang untuk pemenuhan kebutuhan air bersih masyarakat Kota Kupang, sehingga sangat diperlukan upaya pengendalian kualitas dan kuantitas airnya untuk menjaga ketersediaan air berkelanjutan. Penelitian ini bertujuan melakukan evaluasi kualitas daerah aliran sungai  Kali Dendeng  dalam peruntukannya sebagai kualitas air kelas II. Metode yang digunakan dalam penelitian adalah survei lapangan, analisis laboratorium dan penetapan kualitas mutu air menggunakan metode Indeks Pencemaran. Hasil penelitian menunjukkan bahwa dari pengamatan secara langsung di lapangan dan pengukuran di Laboratorium diketahui  parameter yang telah melampaui standar baku mutu adalah kandungan oksigen terlarut (DO) dan BOD5. Selanjutnya hasil perhitungan indeks pencemaran pada  5 segmen atau titik lokasi diketahui  segmen 1 dan 2 masih berada dalam standar mutu kualitas air, sedangkan segmen 2, 3 dan 4 menunjukkan kualitas air sungai Kali Dendeng telah berada dalam kategori tercemar ringan.
Workplace attachment style as moderator of the relationship between political skills and organizational citizenship behaviors
Authors: Bruny Jean-Frantz , Vallée Boris , Bernardi Fabio , Rioux Liliane , Scrima Fabrizio
Published: May 2023

A number of studies have demonstrated the role played by political skills on organizational citizenship behaviors (OCBs). Other research has also shown how the work environment can affect OCBs. However, no research has yet addressed the role that workplace attachment style plays in influencing employee OCBs. The present study aims to investigate the moderating role of workplace attachment style on the relationship between political skills and Organizational Citizenship Behaviors (OCBs) using a cross-sectional design. The research was carried out with the participation of 185 French office workers. Research hypotheses were tested by means of three moderation models. The results show that political skills are positively related to OCB, and that secure and preoccupied workplace attachment styles moderate the relationship between political skills and OCB. These results therefore underline the importance of appropriate organizational environmental management in promoting OCBs.