bluuebunny/crossref_metadata_2025 huggingface dataset:
Spectroscopy of Single Crystal Diamond Plates Modified by Proton Beams to Create NV Centers
Authors: Eseev Marat , Makarov Dmitry , Kostin Aleksey , Podoylov Igor , Kharlamova Anastasia , Ladvischenko Aleksandr , Makarova Ksenia , Yelisseyev Alexander , Vins Victor , Kasatov Dmitrii , Kolesnikov Iaroslav , Savinov Sergey , Shchudlo Ivan M. , Sokolova Evgeniia , Taskaev Sergey , Babunts Roman
Published: October 2023

Currently, synthetic diamonds are finding new applications. Quantum devices can be created based on diamond plates with the desired concentration of defects in the structure of the crystal lattice. NV color centers can be used in quantum applications by irradiating plates with high-energy particles, followed by annealing at temperatures above 800°C to develop the spin-optical properties of the centers Diamond plates are subjected to electron irradiation and much less often to proton irradiation. As a result, synthetic diamond plates with NV centers ob-tained by proton irradiation are less studied, although proton irradiation makes it possible to obtain a layered structure of NV centers. In this work, single crystal diamond plates irradiated with protons were studied using polarization microscopy, IR spectroscopy and ODMR spectros-copy. It is shown that when creating NV centers, the distribution and concentration of C – defects in the sample, as well as mechanical stresses before and after irradiation (with subsequent an-nealing), can differ significantly from each other.
The Role of Imaging Investigations in Evaluation of Cochlear Dimensions in Candidates for Cochlear Implantation- Our Experience
Authors: Neagos Cristian Mircea , Domuta Eugenia Maria , Vlad Anca Gabriela , Neagos Adriana
Published: October 2023

Backround Cochlear implant is the first approved cranial nerve stimulator that works by directly stimulating the cochlear nerve. Various attempts have been made to evaluate the dimensions of the cochlea related to cochlear implantationThe preoperative computed tomographic examination is essential in assessing the anatomical aspect of the cochlea, but also in determining its dimensions, in order to choose an appropriate electrode, in order to obtain the best possible audiological performance.
Method
In the present paper, we aimed to carry out an observational study, regarding the role of cochlear measurements in the preoperative evaluation of patients proposed for cochlear implant. The purpose of the study was to measure the cochlea and to establish the existence of a correlation between the size of the cochlea and the age and gender of the patients.
Results
From the group of 35 examined patients, 54% (n= 19) were male and 46% (n=16) female. The average length of the cochlea in the age group 0-4 years is 7.82 mm in the left ear and 7.86 in the right ear, in the age group 4-7 years it is 7.82 mm and 7.94 mm respectively, for the age group 7-14 years the dimensions increase to 8.48 and 8.77 mm respectively, and after 14 years these dimensions reach 9.12, respectively 9.18 mm. Comparative measurements of the length of the cochlea by age groups show an increase in length with the patient's age, but this increase does not exceed 1.5 mm for both the right and left ears. The measurements of the width of the cochlea, by age group, start from 6.84 mm left ear and 6.81 mm right ear at 0-4 years, 6.94 mm and respective 6.97 mm at the group 4-7 years, 7.71 mm and respective 7.55 mm at 7-14 years , and reaching 8.19 mmm and 8.12 mm at the age of over 14 years.
Conclusions
From the study carried out it can be concluded that the evaluation of the dimensions of the cochlea is important for cochlear implantation, the size variables, although small, are still an element to be considered in correlation with the age of the patient and the implanted ear. This increase is statistically insignificant, but it still exists, even if from a theoretical point of view, it is considered that the dimensions of the cochlea remain constant.
A Facile Two-Step Thermal Process for Producing Dense Phase Pure Cubic Ta-Doped Lithium Lanthanum Zirconium Oxide Electrolyte for Upscaling
Authors: Karuppiah Diwakar , Komissarenko Dmitrii , Yuzbasi Nur Sena , Liu Yang , Warriam Sasikumar Pradeep Vallachira , Hadian Amir , Graule Thomas , Clemens Frank , Blugan Gurdial
Published: October 2023

An inorganic solid electrolyte is the most favorable candidate for replacing flammable liquid electrolytes in lithium batteries. Lithium Lanthanum Zirconium Oxide (LLZO) is considered as a promising solid electrolyte due to its safe operating potential window (0-5V) combined with its good electrochemical stability. In this work, 250 g batches of pre-sintered Tadoped (Li7La3Zr1.6Ta0.4O12, TaLLZO) were synthesized for bulk production of dense LLZO electrolyte. A simple two-step thermal treatment process was developed. The first thermal step at 950 °C initiates nucleation of LLZO carefully controlling process parameters such as heating atmosphere, temperature and dopant concentration. In the second thermal step at 1150 °C, sintered discs were obtained as solid electrolytes, with relative densities of 96%. X-ray diffraction analysis confirmed the phase purity of the sintered TaLLZO disc, and refined data was used to calculate the lattice parameter (12.944 Å). Furthermore, the presence of the Ta dopant in the disc was confirmed through X-ray photoelectron spectroscopy (XPS) analysis. The ionic and electronic conductivity values of TaLLZO disc were 104 S cm-1 and 10-10 S cm-1, respectively. These values confirm that the prepared (Ta-LLZO) discs exhibit ionic conductivity while being electronically insulating, being suitable for use as solid electrolytes with the requisite electrical properties.
Obstructive Sleep Apnea in Patients with Comorbidities and Neck Cancer-Clinical Review
Authors: Kiss Beata , Neagos Cristian Mircea , Jimborean Gabriela , Hédi Katalin Sárközi Balogh , Szathmary Mioara , Neagos Adriana
Published: October 2023

Introduction and objectives Obstructive sleep apnea (OSA) is defined as a cause of daytime sleepiness, as well as a clinical manifestation of sleep-disordered breathing. In the literature, there are numerous controversial studies regarding the etiology of this condition, but it is universally accepted that a significant role in its onset is played by the reduced activity of the upper airway muscles. Additionally, OSA has been associated with a series of comorbidities, such as type II diabetes, metabolic syndrome, cardiovascular and pulmonary conditions, as well as head and neck tumors, especially oropharyngeal and laryngeal tumors. The purpose of this review is to examine and demonstrate the prevalence of OSA in patients with associated pathologies, especially in patients with head and neck tumors, as well as the role of surgical and non-surgical therapeutic methods in improving the quality of life. Material and methods Taking into consideration the stated objective, a systematic analysis of the available literature was conducted, encompassing PubMed, Medline and Scopus databases. The evaluation was based on several keywords, including head and neck cancer, diabetes, diabetic, overlap syndrome, cardiovascular conditions, laryngeal neoplasm, radiotherapy, chemotherapy, as well as the concept of quality of life in laryngectomized patients and patients with OSA. Results Our results demonstrate the involvement of OSA in the presence of comorbidities and also, an increased incidence of OSA in patients with laryngeal cancer. It is important to note that surgical and post-surgical treatment can play a significant role in triggering OSA in these patients. Conclusions The clinician must recognize the increased prevalence of OSA in patients with head and neck cancer, as well as the coexistence of OSA with certain comorbidities. They should actively engage in early diagnosis and establish optimal treatment methods to improve the quality of life for patients with associated conditions such as head and neck tumors or cardiovascular pathology.
Aero-Structural Design Optimization of Wind Turbine Blades
Authors: Batay Sagidolla , Baidullayeva Aigerim , Zhao Yong , Wei Dongming
Published: October 2023

Wind energy is becoming increasingly important as a renewable energy source due to its environmental and economic benefits. Wind turbines are key components in wind energy systems, and their performance is critical for efficient power generation. Wind turbine blades are the most critical components as they interact with the wind, and their design has a significant impact on the overall system performance. Therefore, it is essential to optimize the design of wind turbine blades to enhance their efficiency and reduce their costs. This paper presents an aero-structural optimization approach for wind turbine blade design. The optimization aims to maximize the torque generated by the blade while minimizing its mass. The optimization is implemented using DAFoam software for CFD simulation, TACS for FEM simulation, and Mphys under the OpenMDAO framework for fluid-structure interaction between the CFD and FEM. The optimization results show a 6.78% increase in torque and a 4.22% decrease in mass, which demonstrates the effectiveness of the proposed approach. Aerodynamic optimization focuses on maximizing the blade's torque by modifying the blade's shape. The optimization results show that the optimized blade generates more torque than the original blade design. Additionally, structural optimization aims to minimize the blade's mass while maintaining its structural integrity. This is achieved by adjusting the thickness of the blade's cross-section. The proposed aero-structural optimization approach presents an effective solution for the design optimization of wind turbine blades. The approach considers the interaction between the aerodynamic and structural aspects of the blade and optimizes them simultaneously. This leads to an optimized design that is efficient and cost-effective, which is crucial for the widespread adoption of wind energy systems. The results of this study highlight the importance of considering the interaction between the aerodynamic and structural aspects of wind turbine blades and the effectiveness of the proposed optimization approach in enhancing their performance.
The 3 31 Nucleotide tRNA Evolution Theorem and the Origin of Life
Authors: Lei Lei , Burton Zachary Frome
Published: October 2023

There are no theorems (proven theories) in the biological sciences. We propose that the 3 31 nt minihelix tRNA evolution theorem be universally accepted as one. The 3 31 nt minihelix theorem completely describes evolution of type I and type II tRNAs from ordered precursors (RNA repeats and inverted repeats). Despite diversification of tRNAome sequences, statistical tests overwhelmingly support the theorem. Furthermore, the theorem relates the dominant pathway for the origin of life on Earth, specifically, how tRNAomes and the genetic code may have coevolved. Alternate models for tRNA evolution (i.e., 2 minihelix, convergent and accretion models) are falsified. In the context of the pre-life world, tRNA was a molecule that via mutation could modify anticodon sequences and teach itself to code. We relate the clearest history to date of the chemical evolution of life on Earth. From analysis of tRNA evolution, ribozyme-mediated RNA ligation was a primary driving force in evolution of complexity during the pre-life to life transition on Earth.
Assessment of Spatiotemporal Changes in Precipitation Extreme Climate Indices over Chungcheong Region of South Korea during 1973–2020
Authors: Cho Hyungon , Adelodun Bashir , Kim Hyo-Jeong , Kim Gwangseob
Published: October 2023

This study analyzed the changes and trends in twelve extreme precipitation-based climate indices obtained using daily data from 10 synoptic stations in the Chungcheong region of South Korea during the 1973-2020 period. The climate indices were used to assess the trends in the extreme precipitation characteristics of duration, frequency, and intensity using the innovative trend analysis (ITA) method. The results of the ITA were further compared with two other non-parametric test methods such as Mann-Kendall (MK) and Spearman’s rho (SR). The results showed that the most stations exhibited significant increasing trends in all the investigated climate indices at a 95% confidence level as indicated by the ITA method, with only a few stations indicating significant decreasing trends in R95p, R99p, Rx3day, and Rx5day. The sub-trend analysis further revealed the dominance of neutral behavior around the low-value cluster, especially for the extreme precipitation duration. At the same time, increasing trends dominate the high-value cluster in most stations. Meanwhile, only R10mm, R95p, and R99p exhibited monotonic trends in the Boeun, Seosan, and Boeun stations, respectively. Further, the ITA exhibited superior performance over the MK and SR methods by indicating the presence of more significant trends in the climate indices at most stations. The distribution of extreme precipitation indices for duration, frequency, and intensity indicate the pronounced risk of flood condition around the north-central and some parts of southern regions, while the western region indicate a potential drought risk, which could greatly impact the water resources and consequently agricultural activities in the study area. The results of this study provide essential information for addressing the climate-related problems of water resources management and agriculture in the study area and other related climatic regions.
A Projection of Environmental Impact of a Low Emission Zone Planned in Warsaw, Poland
Authors: Holnicki Piotr , Kałuszko Andrzej , Nahorski Zbigniew
Published: October 2023

Low Emission Zone (LEZ) is an important mechanism to limit the negative environmental impact of traffic pollution in an urban area. Car traffic in the zone is strictly regulated to meet certain technical and environmental criteria. Such solutions of urban environment protection are gaining popularity, especially in European conurbations. Nowadays there are above 300 zones in Europe, mostly established in Italy and Germany. So far there are no LEZs in Eastern and Central European countries. However, the Warsaw authorities are just discussing launching of a LEZ in the city in 2024. According to the ongoing project, the zone is to be launched gradually, in five phases between 2024 and 2032, with the traffic criteria being tightened accordingly. The progressive emission reductions of the predominant pollutants in LEZ in consecutive phases were estimated on the basis of the Real Driving Emissions (RDE) test, carried out in 2020 by the ICCT. The gradually reduced emissions of NOx and PM were subsequently utilized as the input dataset for the regional CALPUFF model predictions, to calculate concentrations of these main traffic-induced pollutants within the LEZ area. The direct effect of the zone activation is reduction of air pollution in the urban center, which is mostly exposed to the pollution risk due to heavy traffic. Computer simulations reveal that implementation of the zone in the case of Warsaw will result in a quite significant reduction of NOx concentrations within the LEZ, such that its mean concentration in the zone becomes comparable to the rest of the conurbation. However, it will bring only a slight reduction of PM2.5 concentrations. This situation is due to the long-standing dominance of coal combustion in the Polish economy, which also applies to the urban municipal sector. As a consequence, particulate matter emissions of this sector are clearly predominant over the road traffic contribution. Balance can be achieved once the ongoing de-carbonization of the national economy has been completed.
Anti-IL1 Therapy Does Not Affect the Response to SARS-COV-2 Vaccination and Infection in Patients with Systemic Autoinflammatory Diseases
Authors: Geck Leonie , Tascilar Koray , Simon David , Kleyer Arnd , Schett Georg , Rech Juergen
Published: October 2023

Patients with sAID are a population at high risk of severe COVID outcomes but evidence on the efficacy of SARS-CoV-2 vaccination in this group of patients is scarce. To investigate the efficacy of SARS-CoV-2 vaccination in patients with systemic autoinflammatory diseases (sAID) receiving interleukin-1 inhibition is important. Vaccination responses from 100 sAID patients most of whom were treated with IL-1inhibitors (N=96) and 100 healthy controls (HC) were ana-lyzed. After 2nd SARS-CoV-2 vaccination, sAID patients showed similar anti-SARS-CoV-2 anti-body responses (mean (SD): 6.7 (2.7)) compared to HC (5.7 (2.4)) as well as similar neutralizing antibodies (85.1 ±22.9% vs. 82.5 ±19.7%). Anti-SARS-CoV-2 antibody responses and neutralizing antibodies were similar in sAID patients after SARS-CoV-2 infection and double vaccination. Furthermore, while antibodies increased after 1st and 2nd vaccination in sAID patients they did not further increase after 3rd and 4th vaccination. No difference was found in antibody responses between anakinra and anti-IL-1 antibody treatments and also the additional use of colchicine or other drugs did not impair vaccination responses. Primary and booster SARS-CoV-2 vaccination lead to protective antibody responses in sAID patients, which are at the same level of vaccination responses in HC and in sAID patients after SARS-CoV-2 infection. Immunomodulatory treatments used in sAID do not seem to affect antibody responses to the SARS-CoV-2 vaccine.
Analyzing the Transferability of Anomaly Detection Knowledge from Computer Science and Mathematics Publications to the Field of Oil and Gas Research
Authors: Chigarev Boris
Published: October 2023

Anomaly detection in equipment processes plays an important role in the oil and gas sector. Algorithms for detecting anomalies in measured data are best understood in computer science and mathematics. Therefore, a possible transfer of knowledge from the latter knowledge area to the former can play a significant role. This paper addresses such a task by analyzing bibliometric data of Computer Science and Mathematics papers published in MDPI journals and publications found on the SPE search platform. It is shown that the main algorithms both extensively studied in MDPI publications and found in SPE publications and reflecting the anomaly detection problem are Random Forest, Support Vector Machine, Long-term Memory Method and Recurrent Neural Network. The main advantages and disadvantages of these methods are briefly described. Examples of classical, highly cited publications describing the work of these algorithms are given. Examples of papers describing their application in the oil and gas industry are given. The sections of SPE disciplines with the largest number of publications using the above algorithms that are frequently used for anomaly detection are presented.
All Bi-Unitary Superperfect Polynomials over F2 with at Most Two Irreducible Factors
Authors: Chehade Haissam , Miari Domoo , Alkhezi Yousuf
Published: October 2023

In this paper, we give all non splitting bi-unitary superperfect polynomials divisible by one or two irreducible polynomials over the prime field of two elements. We prove the nonexistence of odd bi-unitary superperfect polynomials over F2.
A Review: Development of Plant Protection Methods and
Advances in Pesticide Application Technology in Agro-Forestry Production
Authors: Zheng Jiaqiang , Xu Youlin
Published: October 2023

After reviewing the history of the struggle between human beings and plant diseases, insects and weeds, especially reviewing the thoughts of plant protection in ancient Chinese agricultural books, the target recognition of plant pests and the six types of plant protection methods and 36 subdi-vision measures were summarized. Then the development overview of pesticide application technology was focused and reviewed systematically by combining the development timeline of pesticide application and the key technologies including the performance measurement and the simulation and modeling of pesticide spraying system. And three suggestions for further research were proposed from the perspectives of human-being and environmental health, the sustainable and eco-friendly application medium, and the efficiently application equipment system in plant protection.
Robust Control of An Inverted Pendulum System Based on Policy Iteration in Reinforcement Learning
Authors: Dengguo Xu , Yan Ma , Jiashun Huang , Yahui Li
Published: October 2023

This paper is primarily focused on the robust control of an inverted pendulum system based
on the policy iteration in reinforcement learning. First, a mathematical model of the single inverted
pendulum system is established through a force analysis of the pendulum and trolley. Second,
based on the theory of robust optimal control, the robust control of the uncertain linear inverted
pendulum system is transformed into an optimal control problem with an appropriate performance
index. Moreover, for the uncertain linear and nonlinear systems, two reinforcement-learning control
algorithms are proposed using the policy iteration method. Finally, two numerical examples are
provided to validate the reinforcement learning algorithms for the robust control of the inverted
pendulum systems.
Origin and Long-Term Trend of Italian Breeding Forest Birds in the Mediterranean Context
Authors: Massa Bruno
Published: October 2023

The author attempts to reconstruct the climatic vicissitudes of the Mediterranean to explain why only broadly distributed Eurasian forest species have penetrated the Mediterranean peninsulas. He has carried out a bibliographic survey of the status of breeding forest birds in Italy over 15 decades (1872-2022) in order to establish an objective long-term trend (stable, increasing, decreasing, etc.). The number of breeding forest birds in Italy amounts to 61; their distribution, with a few exceptions, indicates that they are widespread in Eurasia, but only a small percentage of Eurasian forest species have colonized Italy and the other Mediterranean peninsulas, namely 49 in Iberian, 61 in Italian and 64 in Balkan peninsulas; a small percentage of them (between 10.9 and 14.3%) belongs to trans-Saharan migrants. The similarity between the forest species on the three peninsulas (Iberian, Italian and Balkan) results between 0.45 and 0.48, indicating a certain differ-ence in the overall fauna on the three territories. Not all species have penetrated southwards into the three peninsulas; for example, some that stopped in the Italian Alps have instead arrived to the forests of Greece, at a latitude corresponding to southern Italy, or species that in Italy stopped in the northern Apennines in the other two peninsulas have instead arrived far south. Iberian peninsula and the island of Corsica hold three endemic species among breeding forest birds, Italian and Balkan peninsulas have not endemic species. Overall, the Mediterranean presently hosts mainly neo-endemic taxa among forest bird species; the only paleo-endemics can be considered the three species of nuthatches living in Corsica, Algeria, and Turkey (other than Caucasus and the islet of Lesvos) and Le Vaillant’s woodpecker in the Maghreb (North Africa). Italian forests cover ca. 40% of land surface and since 1980’ are increasing, but 22% of them do not have a natural origin. However, it is difficult to know the true increase of forests, because some of them are fired every year. The presence of some ecologically demanding forest birds depends on the age of the trees, permanent open spaces and other characteristics at the edge of woodland.
The Influence of Ferroelectric Dipoles on the Output Performance of Triboelectric Nanogenerator
Authors: Li Chunlong , Huang Hui , Ju Dengfeng , Liu Hongjing , Liu Kewen , Gao Lingxiao , Mu Xiaojing
Published: October 2023

A method based on ferroelectric dipole to enhance surface charge density of triboelectric generator was proposed. By using the ferroelectric properties of polyvinylidene fluoride (PVDF), a positive charge trap was formed in the triboelectric layer to enhance the electric generating performance of the triboelectric material, so as to improve the surface charge density of the triboelectric nanogenerator. The PVDF film was fabricated by casting and uniaxial tensile process, and integrated into the triboelectric nanogenerator with vertical separation structure. The influences of the embedding direction, thickness and polarization intensity of the PVDF film on the output of the triboelectric nanogenerator were systematically studied. The results showed that the embedded PVDF piezoelectric film with a thickness of 100 µm and a maximum polarization electric field of 90 MV/m increased the peak power of the triboelectric nanogenerator by 2.6 times. This work has provided a new insight into regulating the properties of the triboelectric nanogenerator.
Adaptive Kinematic Control of Underwater Cable-Driven Parallel Robot
Authors: Kodama Katutoshi , Morinaga Akihiro , Yamamoto Ikuo
Published: October 2023

We previously proposed on the underwater cable-driven parallel robot (UCDPR), a system comprising multiple surface robots, and designed a modeling and trajectory tracking control method for it. However, the conventional trajectory tracking control of the UCDPR using the kinematic controller faced several issues. These included challenges in control gain tuning due to model uncertainty and a decline in trajectory tracking performance caused by changes in system characteristics due to environmental factors like current velocity. In response, this study focuses on the development of an adaptive kinematic controller. The aim is to mitigate the effects of uncertainties and other factors while ensuring effective trajectory tracking. This is achieved by incorporating an adaptive modification term into the conventional kinematic controller, which can be tuned adaptively in real-time. To validate the effectiveness of the adaptive kinematic controller, we conducted numerical simulations using a planar 2-DOF UCDPR.
Local Curvature Estimation and Grasp Stability Prediction Based on Proximity Sensors on a Multi-Fingered Robot Hand
Authors: Suzuki Yosuke , Yoshida Ryoya , Tsuji Tokuo , Nishimura Toshihiro , Watanabe Tetsuyou
Published: October 2023

This study aims to realize a precision grasp of unknown-shaped objects. Precision grasping requires a detailed understanding of the surface shapes such as concavity and convexity. If an accurate shape model is not given in advance, it must be addressed by sensing. We have proposed a method for recognizing detailed object shapes using proximity sensors equipped on each fingertip of a multi-fingered robot hand. Direct sensing of the object’s surface from the fingertips enables both avoidance of unintended collision during the approach process and recognition of surface profiles for use in planning and executing stable grasping. This paper introduces local surface curvature estimation to improve the accuracy of local surface recognition. We propose practical and accurate models to estimate local curvature based on various characteristic tests on the proximity sensor and to estimate the distance to the nearest point. In actual experiments, it was shown that it was possible to estimate the position of the nearest point with a mean error of less than 2 mm and to predict grasping stability in reasonable real-time for the object shape.
PELATIHAN MANAJEMEN BANK SAMPAH BAGI MASYARAKAT DI KECAMATAN MUARA GEMBONG
Authors: Ramadhan Agphin Muhammad , Iriani Tuti
Published: October 2023

This activity is a community service activity carried out by a team of lecturers and students of the Civil Engineering FT UNJ in collaboration with Muara Gembong sub-district and the Pantai Mekar village apparatus. Problems that occur in Muara Gembong are related to critical environmental conditions in coastal areas. Plastic waste that is scattered increasingly makes the environment irregular. This problem is a domino effect of the high level of abrasion in the region. The output target to be achieved is that the community gets knowledge about waste management through a waste bank. In addition, this activity can motivate people to manage waste. The waste bank system is expected to be effective in protecting the environment. This can be an additional income for the customers of the waste bank. The method of activity consists of the preparation and implementation stages. The preparation stage is in the form of regional observation and communication with partners. Then, the implementation phase is in the form of debriefing and training in waste bank management.

 

Abstrak

Pelatihan Manajemen Bank Sampah bagi Masyarakat di Kecamatan Muara Gembong, Kabupaten Bekasi, Provinsi Jawa Barat merupakan kegiatan pengabdian masyarakat yang dilakukan oleh tim dosen dan mahasiswa Rumpun Teknik Sipil FT UNJ bekerja sama dengan kecamatan Muara Gembong dan aparatur desa Pantai Mekar. Permasalahan yang ditemui berkaitan dengan kondisi lingkungan yang kritis di wilayah pesisir Muara Gembong. Sampah-sampah plastik yang berserakan semakin membuat lingkungan tidak teratur. Permasalahan ini merupakan efek domino dari semakin tingginya tingkat abrasi di wilayah tersebut. Target luaran yang ingin dicapai adalah masyarakat mendapatkan pengetahuan mengenai pengelolaan sampah melalui bank sampah. Selain itu, kegiatan ini dapat memotivasi masyarakat dalam mengelola sampah. Konsep bank sampah diharapkan selain menjaga lingkungan sekitar dapat pula menjadi tambahan pemasukan bagi para nasabah bank sampah. Metode kegiatan terdiri dari tahap persiapan dan pelaksanaan. Tahap persiapan yaitu berupa observasi wilayah dan menjalin komunikasi dengan mitra. Kemudian, tahap pelaksanaan berupa pembekalan dan pelatihan manajemen bank sampah.
Training 21st Century English Language Teachers in Turkish Context: Development of a Technology-Enhanced Measurement Curriculum
Authors: ŞENTÜRK Burcu , AKSU DÜNYA Beyza , DEMİR Mehmet Can
Published: October 2023

A case study that included 26 English Language teacher candidates was designed for developing an evidence-based measurement curriculum in Turkey, examining teacher candidates’ experiences on the newly developed course and taking remedial actions for updating the syllabus if needed. Data was collected using multiple sources: a pre-course survey, weekly discussion board on Edmodo and a post-course survey. Survey data obtained from rating-scale items was analyzed using descriptive statistics and data visualization packages embedded in R. Open-ended survey data and discussion board data were content-analyzed using MaxQDA software. The results revealed that students had limited awareness regarding assessment for learning concept and digital tools that could be used for assessment for learning purposes at the beginning of the course. Course content, in-class activities and projects helped them develop hands-on skills in developing sound language assessments as well as raised their awareness with respect to the importance of computer-based language assessment.
The Effect Of Using E-Portfolios On The Self-Regulation Skills Of Students: A Meta-Analysis Study
Authors: MUTLUER Ceren
Published: October 2023

The change of self-regulation skills, one of the variables determining success in education, with measurement and evaluation techniques in the education process has been the subject of many studies. However, each research result leads to different results due to the planned situation and limitations. For this reason, e-portfolios used in the education process were examined with a meta-analysis study to evaluate whether they were effective on students' self-regulation skills from a more general point of view. The research is limited to published academic studies written in Turkish and English between 2000 and 2023. When the criteria determined in the research were examined, only 19 studies were found by these criteria. Theoretically, when the effect sizes in each study were examined, a meta-analysis was carried out with the random effects model. The analyzes of the research were made with the CMA version 3 program. As a result of the research, it was concluded that using e-portfolios greatly and significantly affect students' self-regulation skills.
Inspeção predial - Aferição de estanqueidade de SVVI e retrossifonagem de fumaça proveniente de churrasqueira em empreendimento residencial de múltiplos pavimentos
Authors:   Laboratório de Ensayos y Modelos Estructurales, Universidad Federal de Rio Grande do Sul, Porto Alegre, Brasil., Covatti L. , Medeiros A. ,   Departamento Académico de Construcción Civil, Universidad Tecnológica Federal de Paraná, Curitiba Brasil., Filho L. C. P. S. ,   Laboratório de Ensayos y Modelos Estructurales, Universidad Federal de Rio Grande do Sul, Porto Alegre, Brasil.
Published: October 2023

Manifestações patológicas em construções com Habite-se recém adquiridos vem se tornando cada fez mais frequente no Brasil. Alguns desses problemas podem ser altamente nocivos para a saúde humana, como é o caso de infiltrações e retrossifonagem de fumaça proveniente da queima de combustível sólido produzidos em churrasqueiras. Foram realizadas duas simulações de uso extremo de churrasqueira em uma construção de múltiplos pavimentos na cidade de Curitiba, Paraná, Brasil onde haviam relatos destas manifestações patológicas. Foi possível constatar que as manifestações patológicas eram provenientes de falhas de projeto, execução e uso e operação do empreendimento.
Manifestações patológicas em concreto: estudo de caso em edificação residencial
Authors:   Faculdade de Engenharia Civil, Faculdade Multivix, Serra – ES, Brasil., Lima D. N. , Alvarenga M. ,   Faculdade de Engenharia Civil, Faculdade Multivix, Serra – ES, Brasil., Souza T. C. ,   Faculdade de Engenharia Civil, Faculdade Multivix, Serra – ES, Brasil., Sarmento Junior R. G. ,   Departamento de Engenharia Civil, Faculdade Multivix – Serra – ES, Brasil., Vieira G. ,   Departamento de Engenharia Civil, Universidade Federal do Espírito Santo, Vitória – ES, Brasil.
Published: October 2023

Este estudo apresenta uma análise das anomalias em uma edificação unifamiliar, executada em estrutura de concreto, com o objetivo de identificar suas principais causas, prevenções e soluções. Para isso, foi realizada uma pesquisa teórica sobre as intercorrências de sintomas patológicos em estruturas, além disso foi realizada uma verificação dos ambientes da residência, por meio de um checklist, com apresentação de registro fotográfico e descrição das anomalias identificadas. Diversas anomalias foram encontradas na edificação, incluindo trincas, fissuras e desplacamento. Foram identificadas possíveis causas relacionadas à baixa qualidade do concreto utilizado na construção, bem como problemas de projeto e execução. Essas questões estavam associadas à autoconstrução, ausência de um projeto de engenharia e arquitetura adequado, além da falta de envolvimento de um profissional de engenharia contratado para a execução da obra. Conclui-se que é fundamental o uso de técnicas adequadas de projeto e execução afim de evitar anomalias em estruturas de concreto armado, e que a adoção de soluções eficazes é essencial para garantir a segurança e durabilidade das construções.
Método de inspeção e recebimento de edificações novas
Authors:   Grupo de Avaliações e Perícias de Engenharia, INBEC, Universidade Paulista, São Paulo, Brasil., Grossi M. V. F.
Published: October 2023

As inspeções de recebimento são úteis em diversas situações, podendo ser demandadas por incorporadores, construtores, consumidores, agentes financiadores, seguradoras e entidades públicas. Para colaborar, foi realizado trabalho (GROSSI, 2019) propondo métodos de inspeção de recebimento de edificações novas, com base em normas técnicas, legislação e técnicas construtivas consagradas, observado aspectos de segurança, habitabilidade e durabilidade. Este é um tema de muita importância na América Latina, onde há muitos estudos voltados para inspeção predial durante o uso, porém, com poucas referências sobre recebimento de edificações novas. A pesquisa deste trabalho teve como base bibliografias brasileiras e internacionais. O trabalho considera a maioria dos sistemas construtivos, buscando identificar anomalias manifestas e potenciais, tanto na edificação, quanto em seu terreno e na vizinhança.
Estudo comparativo da eficiência entre diferentes tipos de tratamento de juntas de concretagem
Authors:   Universidade Federal de Pernambuco (UFPE), Recife, Brasil., Andrade T. , Moura Jr. J. M. ,   Escola Politécnica de Pernambuco (POLI), Universidade de Pernambuco (UPE), Recife, Brasil., Monteiro E. C. B. ,   Escola Politécnica de Pernambuco (POLI), Universidade de Pernambuco (UPE), Recife, Brasil. Universidade Católica de Pernambuco (UNICAP), Recife, Brasil., Póvoas Y. V. ,   Escola Politécnica de Pernambuco (POLI), Universidade de Pernambuco (UPE), Recife, Brasil.
Published: October 2023

É comum questionamentos em concretagens onde estão previstas juntas de concretagem horizontais, qual o tratamento a ser adotado para unir o concreto novo com o concreto já lançado e endurecido. A NBR 14931 (ABNT, 2023) cita o corte verde, o apicoamento, barras extras de ligação e salgamento com brita como procedimentos recomendáveis para o tratamento dessas juntas. Este trabalho, através da moldagem de prismas com juntas transversais no centro do prisma e ensaio de resistência à tração na flexão, procurou avaliar o desempenho relativo de diversos tratamentos de juntas estudados. Para o experimento, foram confeccionados para cada tipo de junta 04 prismas, sendo utilizadas juntas apicoadas, juntas com corte verde, com emprego de retardador de superfície e juntas vassouradas com vassouramento da superfície. Além desses tratamentos, foram moldados prismas sem nenhum tipo de tratamento na junta e prismas sem junta de concretagem para determinar a resistência à tração do concreto de referência, utilizado no experimento. Os resultados mostraram que todas as juntas de concretagem tratadas tiveram desempenhos semelhantes e significativamente superior a junta não tratada.
Analysis of the properties of mortars produced with coconut fibers treated with triethroxy(octyl)silane
Authors:   Engenharia Civil, Instituto Federal de Educação, Ciência e Tecnologia de Rondônia, Porto Velho, Brasil., Brasil Cavalheiro R. , Blodow do Nascimento C. ,   Engenharia Civil, Instituto Federal de Educação, Ciência e Tecnologia de Rondônia, Porto Velho, Brasil., Silva Monteiro Barbosa C. E. ,   Engenharia Civil, Instituto Federal de Educação, Ciência e Tecnologia de Rondônia, Porto Velho, Brasil., Batista Mota W. K. ,   Engenharia Civil, Instituto Federal de Educação, Ciência e Tecnologia de Rondônia, Porto Velho, Brasil., Mota Barroso G. ,   Engenharia Civil, Instituto Federal de Educação, Ciência e Tecnologia de Rondônia, Porto Velho, Brasil., Días da Silva E. ,   Engenharia Civil, Instituto Federal de Educação, Ciência e Tecnologia de Rondônia, Porto Velho, Brasil., Costa de Oliveira V. ,   Engenharia Civil, Instituto Federal de Educação, Ciência e Tecnologia de Rondônia, Porto Velho, Brasil., César Pierozan R. ,   Engenharia Civil, Instituto Federal de Educação, Ciência e Tecnologia de Rondônia, Porto Velho, Brasil.
Published: October 2023

The aim of this study was to assess the effect of triethoxy(octyl)silane treatment on coconut fiberswhen incorporated into mortars. Vegetable fibers are commonly utilized in such composites. However, they can degrade in alkaline environments. The experimental approach involved treating coconut fibers with triethoxy(octyl)silane at different mass percentages relative to the cement. The findings revealed that cementitious composites incorporating treated vegetable fibers demonstrated enhanced workability, water retention, and water absorption properties compared to untreated materials. Moreover, there was no notable decline in mechanical properties. These results highlight the potential of triethoxy(octyl)silane treatment as a means to improve the performance and durability of cementitious composites incorporating vegetable fibers, thus contributing to the development of sustainable and resilient construction materials.
Efecto del óxido de grafeno en la microestructura del cemento y en la durabilidad del hormigón
Authors:   Departamento de Ingeniería Civil: Construcción, E.T.S. de Ingenieros de Caminos, Canales y Puertos. Universidad Politécnica de Madrid. C/ Profesor Aranguren, s/n, 28040, Madrid, España., Djenaoucine L. , Picazo Á. ,   Departamento de Tecnología de la Edificación, E.T.S. de Edificación. Universidad Politécnica de Madrid. Avda. Juan de Herrera, 6, 28040, Madrid, España., de la Rubia M. Á. ,   Departamento de Ingeniería Civil: Construcción, E.T.S. de Ingenieros de Caminos, Canales y Puertos. Universidad Politécnica de Madrid. C/ Profesor Aranguren, s/n, 28040, Madrid, España., Gálvez J. C. ,   Departamento de Ingeniería Civil: Construcción, E.T.S. de Ingenieros de Caminos, Canales y Puertos. Universidad Politécnica de Madrid. C/ Profesor Aranguren, s/n, 28040, Madrid, España., Moragues A. ,   Departamento de Ingeniería Civil: Construcción, E.T.S. de Ingenieros de Caminos, Canales y Puertos. Universidad Politécnica de Madrid. C/ Profesor Aranguren, s/n, 28040, Madrid, España.
Published: October 2023

El óxido de grafeno (OG) es un aditivo nanométrico que puede mejorar el comportamiento de los materiales cementicios. Para evaluar el efecto del OG en la durabilidad del hormigón se realizaron tres dosificaciones de hormigón, sin OG y con un 0,0005% y 0,005% de OG en peso de cemento. La durabilidad fue evaluada mediante ensayos de resistividad eléctrica, difusión de cloruros y permeabilidad al agua, mostrando una mejora significativa de la protección del hormigón frente al ataque de agentes externos. De acuerdo a los resultados, con la adición de OG, el coeficiente de difusión de iones cloruro disminuyó y aumentó la resistividad eléctrica. Por lo indicado se puede concluir que la incorporación de OG a materiales cementicios puede aumentar significativamente su durabilidad.
Evaluación del uso de microsílice como Material Cementicio Suplementario (MCS) en el hormigón
Authors:   Departamento de Ingeniería Civil, Facultad de tecnología, Universidad Privada del Valle, Cochabamba, Bolivia., Escobedo Villaruel J. F. , Rocha J. H. A. ,   Programa de Engenharia Civil, Universidade Federal de Rio de Janeiro, COPPE/UFRJ, Rio de Janeiro, Brasil., Cayo N. G. ,   Ciência e tecnologia da madeira, Universidade Federal de Lavras, Lavras, Brasil.
Published: October 2023

La presente investigación tiene por objetivo evaluar el uso de la microsílice como MCS, en sustitución de 5, 10, 15 y 20% y adición de 5 y 10%, ambos con relación al peso del cemento para un hormigón con resistencia media de diseño de 25 MPa. La metodología consistió en la caracterización físico-química de los materiales (cemento y microsílice) y la evaluación de la trabajabilidad, propiedades físicas (absorción, densidad e índice de vacíos) y propiedades mecánicas (resistencia a la tracción y compresión) para las edades de 7, 28 y 56 días. Los resultados demuestran que el uso microsílice disminuye la trabajabilidad para elevados porcentajes de sustitución. Con respecto a las propiedades mecánicas, se presenta una mejora significativa especialmente para la adición y sustitución de cemento por 5% de microsílice. Por otro lado, las propiedades físicas mejoran significativamente para la adición de 5% de microsílice. En este sentido, el uso de microsílice como MCS es factible, especialmente para porcentajes menores, teniendo los mejores resultados a 5% de microsílice
SOLANDA: “De lo planificado a la realidad de lo construido”
Authors:   Facultad de Arquitectura, Diseño y Artes, Universidad Internacional del Ecuador, Quito, Ecuador., Morillo-Aguilar N. J. , Lara M. L. ,   Departamento de Construcción y tecnologías arquitectónicas, Universidad Politécnica de Madrid, España.
Published: October 2023

Cuando se habla de Solanda, se habla de un ícono proyectual, vivienda progresiva, informalidad, caos y la construcción del Metro de Quito. Al explorar el sitio se evidencia un proceso paulatino de crecimiento de sus construcciones a causa de un plan habitacional de los 80, que indagó modestamente sobre las necesidades del usuario, la técnica constructiva, los materiales empleados, la concepción de vivienda progresiva y las particularidades del suelo donde se ubica Solanda, pues es una meseta rodeada de grandes quebradas y drenajes naturales, que hoy en día evidencia aquellos avenamientos, rellenos y ligereza de suelo. El construir en un suelo inestable húmedo pantanoso trae consigo no solo inestabilidad geomorfológica sino también percepción de inseguridad física, caos social y desconfianza constructiva.
Análise experimental do desempenho de copolímero acrílico no tratamento de superfícies de cobertura
Authors:   Engenharia Civil, Instituto Federal de Educação, Ciência e Tecnologia de Rondônia, Porto Velho, Brasil., Gomes Fonseca G. , Costa de Oliveira V. ,   Engenharia Civil, Instituto Federal de Educação, Ciência e Tecnologia de Rondônia, Porto Velho, Brasil., Costa Teles Gonzaga L. B. ,   Engenharia Civil, Instituto Federal de Educação, Ciência e Tecnologia de Rondônia, Porto Velho, Brasil., Guastovara David L. ,   Engenharia Civil, Instituto Federal de Educação, Ciência e Tecnologia de Rondônia, Porto Velho, Brasil., Malta Barbosa V. ,   Engenharia Civil, Instituto Federal de Educação, Ciência e Tecnologia de Rondônia, Porto Velho, Brasil., Kemp T. K. ,   Engenharia Civil, Instituto Federal de Educação, Ciência e Tecnologia de Rondônia, Porto Velho, Brasil.
Published: October 2023

A absorção de água pelas telhas pode comprometer sua durabilidade e gerar anomalias construtivas nos sistemas de coberturas. O problema da presença de água na construção civil, que resulta em infiltrações e danos, é destacado. Desta forma, o objetivo deste estudo é avaliar o desempenho de um copolímero em diferentes tipos de telhas. A metodologia adotada é um programa experimental que inclui a caracterização geométrica das telhas, preparação dos substratos e aplicação do copolímero. As telhas foram submetidas a simulações de chuva para testar sua resistência à água. O copolímero demonstrou ser capaz de reduzir significativamente a absorção de água entre as diferentes telhas, proporcionando uma proteção adicional contra a infiltração.
Efecto de las nanoadiciones carbonosas en las funciones de percepción de la deformación y calefacción en pastas cementicias
Authors:   Departamento de Ingeniería Civil, Escuela Politécnica Superior, Universidad de Alicante, España., Moral B. , Farcas C. ,   Departamento de Ingeniería Civil, Escuela Politécnica Superior, Universidad de Alicante, España., Galao O. ,   Departamento de Ingeniería Civil, Escuela Politécnica Superior, Universidad de Alicante, España., Baeza F. J. ,   Departamento de Ingeniería Civil, Escuela Politécnica Superior, Universidad de Alicante, España., Zornoza E. ,   Departamento de Ingeniería Civil, Escuela Politécnica Superior, Universidad de Alicante, España., Garcés P. ,   Departamento de Ingeniería Civil, Escuela Politécnica Superior, Universidad de Alicante, España.
Published: October 2023

En esta investigación se ha estudiado el uso de nanoadiciones conductoras, como los nanotubos de carbono (NTC) y productos de grafito (PG), en probetas de cemento para desarrollar las funciones de percepción de la deformación y calefacción. Para ello, se han fabricado probetas de pasta de cemento con adición de 1%NTC y 5% PG y se han realizado ensayos de calefacción en corriente continua (DC) y alterna (AC) a 20V y 40V. Además, se ha estudiado la influencia de la temperatura en los ensayos de percepción de la deformación en rangos comprendidos entre 0 °C y 60 °C, obteniéndose buenos resultados en ambas técnicas. Por tanto, estos materiales ofrecen una alternativa muy interesante en la monitorización estructural y pueden tener aplicaciones en la calefacción de infraestructuras como puentes y aeropuertos, evitando el uso de sustancias corrosivas.