bluuebunny/crossref_metadata_2025 huggingface dataset:
Perspectives of Using Lignin as Additive to Improve the Permeability of In-Situ Soils for Barrier Materials in Landfills
Authors: Di Matteo Lucio , Bulletti Lorenzo , Capecchi Eliana , La Viola Antonio , Piccinino Davide , Piscopo Vincenzo
Published: June 2020

Very often, in-situ soil does not meet the requirements for landfill barriers; therefore, it is necessary to purchase the material from quarries. An increasing number of by-products have been proposed as alternative landfill barrier materials. The present study investigated the performance of two soils of Central Italy (alluvial and volcanic soils) with an organosolv lignin (sulfur-free lignin (SFL)), a widespread by-product in the world. Laboratory investigations indicated that the volcanic soil mixed with 10% in weight of lignin did not reach the permeability value required for landfill bottom liners, also showing high compressibility. On the contrary, the addition of 20% to 30% lignin to the alluvial soil reached the permeability value recommended for the top-sealing layer of landfills: scanning electron microscope analysis indicated that the improvement was due mainly to the physical binding. Large-scale investigations should be carried out to evaluate the long-term performance of the mixtures. The increasing production of organosolv lignin worldwide gives this by-product the opportunity to be used as an additive for the realization of the top-sealing layer. The approach can save the consumption of raw materials (clayey soils from quarries), giving lignin a potential new field of application and recovering in-situ soils.
Damage Indices and Photogrammetry for Decay Assessment of Stone-Built Cultural Heritage: The Case Study of the San Domenico Church Main Entrance Portal (South Calabria, Italy)
Authors: Randazzo Luciana , Collina Matteo , Ricca Michela , Barbieri Loris , Bruno Fabio , Arcudi Anna , La Russa Mauro F.
Published: June 2020

In recent decades, increasing attention is being paid to the multidisciplinary approach that allows the performance of both a preventive conservation and a more invasive restoration action. In this context, the present study aims to acquire information and data from field surveys undertaken in San Domenico Church, Southern Calabria, in order to provide a tool for the recording and the inventory of damage and decay phenomena, and assess their causes and scale. The subsequent calculation of damage indices also provided useful information in order to allow the prioritization of conservation and preservation responses.
Predicting the Volume of Response to Tweets Posted by a Single Twitter Account
Authors: Fiok Krzysztof , Karwowski Waldemar , Gutierrez Edgar , Ahram Tareq
Published: June 2020

Social media users, including organizations, often struggle to acquire the maximum number of responses from other users, but predicting the responses that a post will receive before publication is highly desirable. Previous studies have analyzed why a given tweet may become more popular than others, and have used a variety of models trained to predict the response that a given tweet will receive. The present research addresses the prediction of response measures available on Twitter, including likes, replies and retweets. Data from a single publisher, the official US Navy Twitter account, were used to develop a feature-based model derived from structured tweet-related data. Most importantly, a deep learning feature extraction approach for analyzing unstructured tweet text was applied. A classification task with three classes, representing low, moderate and high responses to tweets, was defined and addressed using four machine learning classifiers. All proposed models were symmetrically trained in a fivefold cross-validation regime using various feature configurations, which allowed for the methodically sound comparison of prediction approaches. The best models achieved F1 scores of 0.655. Our study also used SHapley Additive exPlanations (SHAP) to demonstrate limitations in the research on explainable AI methods involving Deep Learning Language Modeling in NLP. We conclude that model performance can be significantly improved by leveraging additional information from the images and links included in tweets.
Parking Site Selection for Light Rail Stations in Muaeng District, Khon Kaen, Thailand
Authors: Prasertsri Narueset , Sangpradid Satith
Published: June 2020

Khon Kaen District is in the central, north-east part of Thailand and is being developed to handle the country’s growth. Khon Kaen District is undertaking the project of building a light rail as a facility for the people. Consequently, one of the problems is ensuring adequate parking for people using the light rail service. In general, the symmetry concept naturally used in decision making to finding an optimal solution for decision and optimization problems. In this paper, multi-criteria decision analysis (MCDA) and multi-objective decision making (MODM) were used to solve the parking site selection problem, which made the decision easier. This paper proposed an analytic hierarchy process (AHP) technique, combined with the geographical information system (GIS), to evaluate the weight of the criteria used in the analysis and find potential parking solutions. Furthermore, this paper proposed the application of a linguistic technique with fuzzy TOPSIS methods to analyze the appropriateness of parking site selections from potential candidates to support use of the light rail. The results of the MCDA show that the most suitable parking lot location is along the light rail and closest to the business area. The results of the fuzzy TOPSIS method, both positive and negative ideal decisions, can help inform decision makers in selecting which candidate site is optimal for parking.
Cloud Detection for Satellite Imagery Using Attention-Based U-Net Convolutional Neural Network
Authors: Guo Yanan , Cao Xiaoqun , Liu Bainian , Gao Mei
Published: June 2020

Cloud detection is an important and difficult task in the pre-processing of satellite remote sensing data. The results of traditional cloud detection methods are often unsatisfactory in complex environments or the presence of various noise disturbances. With the rapid development of artificial intelligence technology, deep learning methods have achieved great success in many fields such as image processing, speech recognition, autonomous driving, etc. This study proposes a deep learning model suitable for cloud detection, Cloud-AttU, which is based on a U-Net network and incorporates an attention mechanism. The Cloud-AttU model adopts the symmetric Encoder-Decoder structure, which achieves the fusion of high-level features and low-level features through the skip-connection operation, making the output results contain richer multi-scale information. This symmetrical network structure is concise and stable, significantly enhancing the effect of image segmentation. Based on the characteristics of cloud detection, the model is improved by introducing an attention mechanism that allows model to learn more effective features and distinguish between cloud and non-cloud pixels more accurately. The experimental results show that the method proposed in this paper has a significant accuracy advantage over the traditional cloud detection method. The proposed method is also able to achieve great results in the presence of snow/ice disturbance and other bright non-cloud objects, with strong resistance to disturbance. The Cloud-AttU model proposed in this study has achieved excellent results in the cloud detection tasks, indicating that this symmetric network architecture has great potential for application in satellite image processing and deserves further research.
Gustatory Function and the Uremic Toxin, Phosphate, Are Modulators of the Risk of Vascular Calcification among Patients with Chronic Kidney Disease: A Pilot Study
Authors: Chen Shih-I , Chiang Chin-Ling , Chao Chia-Ter , Chiang Chih-Kang , Huang Jenq-Wen
Published: June 2020

Patients with chronic kidney disease (CKD) have an increased risk of vascular calcification (VC), including aortic arch calcification (AAC). Few investigated the influence of gustatory function on the probability of having VC. We examined whether gustatory function results modulated the probability of having VC in patients with CKD. We prospectively enrolled adults with CKD (estimated glomerular filtration rate <60 mL/min/1.73 m2), with their AAC rated semi-quantitatively and gustatory function assessed by objective and subjective approaches. Multiple logistic regression was used to analyze the relationship between gustatory function results and AAC. Those with AAC had significantly better objective gustatory function in aggregate scores (p = 0.039) and categories (p = 0.022) and less defective bitter taste (p = 0.045) and scores (p = 0.037) than those without. Multiple regression analyses showed that higher aggregate scores (odds ratio (OR) 1.288, p = 0.032), or better gustatory function, and higher bitter taste scores (OR 2.558, p = 0.019) were each associated with a higher probability of having AAC among CKD patients; such an association was modulated by serum phosphate levels. In conclusion, better gustatory function was independently correlated with having AAC among CKD patients. A follow-up of VC severity may be an underrecognized component of care for CKD patients with a preserved gustatory function.
Simplified Numerical Model for Analyzing the Effects of the Urban Heat Island upon Low-Rise Buildings by Using a Free-License Thermal Simulation Program
Authors: Oropeza-Perez Ivan
Published: June 2020

In this document, the thermal effect of a heat island upon an urban area and its surrounding low-rise buildings is analyzed with the building thermal simulation program EnergyPlus and its EnergyPlus weather files (EPW). By using a top-down approach, a simplified numerical model is developed, which is used to simulate the urban heat island effect, and that deals with the performance of various cooling methods according to the physical, urban, and climatic characteristics of the urban site. The calculated results of outdoor air temperature considering the heat island effect achieve good agreement with the already-published results. Then, different methods of shading and cooling, varying physical values such as urban thermal transmittance, and urban thermal absorption are applied in order to find the most influencing feature upon the indoor temperature drop into a simulation loop. With this, it is found that a maximum average decrease of indoor temperature of 5.1 °C can be achieved. Furthermore, carrying out a sensitivity analysis, it is found that the albedo of both building surface and urban layout is the most influencing parameter onto the indoor thermal comfort. With this, it is expected to have a reliable model that helps to understand the urban heat island effect in a simple and cheap manner and in terms of the indoor thermal comfort of its surrounding buildings.
On the Impact of Maximum Speed on the Power Density of Electromechanical Powertrains
Authors: Schweigert Daniel , Gerlach Martin Enno , Hoffmann Alexander , Morhard Bernd , Tripps Alexander , Lohner Thomas , Otto Michael , Ponick Bernd , Stahl Karsten
Published: June 2020

In order to achieve the European Commission’s ambitious climate targets by 2030, BEVs (Battery Electric Vehicles) manufacturers are faced with the challenge of producing more efficient and ecological products. The electromechanical powertrain plays a key role in the efficiency of BEVs, which is why the design parameters in the development phase of electromechanical powertrains must be chosen carefully. One of the central design parameters is the maximum speed of the electric machines and the gear ratio of the connected transmissions. Due to the relationship between speed and torque, it is possible to design more compact and lighter electric machines by increasing the speed at constant power. However, with higher speed of the electric machines, a higher gear ratio is required, which results in a larger and heavier transmission. This study therefore examines the influence of maximum speed on the power density of electromechanical powertrains. Electric machines and transmissions with different maximum speeds are designed with the state-of-the-art for a selected reference vehicle. The designs are then examined with regard to the power density of the overall powertrain system. Compared to the reference vehicle, the results of the study show a considerable potential for increasing the power density of electromechanical powertrains by increasing the maximum speed of the electric machines.
Conserving Mekong Megafishes: Current Status and Critical Threats in Cambodia
Authors: Campbell Teresa , Pin Kakada , Ngor Peng , Hogan Zeb
Published: June 2020

Megafishes are important to people and ecosystems worldwide. These fishes attain a maximum body weight of ≥30 kg. Global population declines highlight the need for more information about megafishes’ conservation status to inform management and conservation. The northern Cambodian Mekong River and its major tributaries are considered one of the last refugia for Mekong megafishes. We collected data on population abundance and body size trends for eight megafishes in this region to better understand their conservation statuses. Data were collected in June 2018 using a local ecological knowledge survey of 96 fishers in 12 villages. Fishers reported that, over 20 years, most megafishes changed from common to uncommon, rare, or locally extirpated. The most common and rarest species had mean last capture dates of 4.5 and 95 months before the survey, respectively. All species had declined greatly in body size. Maximum body weights reported by fishers ranged from 11–88% of their recorded maxima. Fishers identified 10 threats to megafishes, seven of which were types of illegal fishing. Electrofishing was the most prevalent. Results confirm that Mekong megafishes are severely endangered. Species Conservation Strategies should be developed and must address pervasive illegal fishing activities, alongside habitat degradation and blocked migrations, to recover declining populations.
The Ecosystem Resilience Concept Applied to Hydrogeological Systems: A General Approach
Authors: de la Hera-Portillo África , López-Gutiérrez Julio , Zorrilla-Miras Pedro , Mayor Beatriz , López-Gunn Elena
Published: June 2020

We have witnessed the great changes that hydrogeological systems are facing in the last decades: rivers that have dried up; wetlands that have disappeared, leaving their buckets converted into farmland; and aquifers that have been intensively exploited for years, among others. Humans have caused the most part of these results that can be worsened by climate change, with delayed effects on groundwater quantity and quality. The consequences are negatively impacting ecosystems and dependent societies. The concept of resilience has not been extensively used in the hydrogeological research, and it can be a very useful concept that can improve the understanding and management of these systems. The aim of this work is to briefly discuss the role of resilience in the context of freshwater systems affected by either climate or anthropic actions as a way to increase our understanding of how anticipating negative changes (transitions) may contribute to improving the management of the system and preserving the services that it provides. First, the article presents the basic concepts applied to hydrogeological systems from the ecosystem’s resilience approach. Second, the factors controlling for hydrogeological systems’ responses to different impacts are commented upon. Third, a case study is analyzed and discussed. Finally, the useful implications of the concept are discussed.
SOME ASPECTS OF THE EVALUATION ACTIONS OF MILITARY OFFICERS OF ANTI-TERRORIST OPERATION AND THEIR DIFFERENCES FROM EVALUATION THE ACTIONS OF THE SAME PERSONS DURING THE UNITED FORCES OPERATION
Authors: Vlasiuk A.
Published: June 2020

The article lays out certain aspects that are being investigated within the framework of the research work “Development of a methodology for conducting military forensic assessments of the actions of officials (leaders, commanders, chiefs) of counter-terrorism entities during an anti-terrorist operation” based on the analysis of the structure of the forensic expert methodology, as well as their differences from the evaluation of the actions of the same persons during the operation of the united forces in repelling armed aggression of the Russian Federation.

Thus, research of certain aspects of the evaluation of the actions of officials (leaders, commanders, chiefs, other military personnel) of the anti-terrorist operation and the actions of the same persons during the operation of the united forces, indicates differences in international and national legislative, other regulatory regulation of their activities. In particular, in various state-authorized bodies of the state security and defense sector, forces and means that were used (are used) during the operation, management of the operation, goals, objectives, functions, planning, provision and organization of its implementation, use as directed by personnel military units, the legality of using weapons, etc.

At the same time, the conducted studies provide the basis for understanding the need to further improve the legal regulation of operations by forces and means of the Armed Forces of Ukraine, the Security Service of Ukraine, other bodies of the security and defense sector and searching and providing answers to questions that arise in modern conditions administration of justice, including in the course of conducting forensic military examinations.
CLINICAL STRUCTURE OF MENTAL VIOLATIONS OF PERSONS WHO HAVE COMMITTED A CRIME OF SEXUAL NATURE
Authors: Kozeratska O.
Published: June 2020

The article deals with the results of a scientific study carried out as part of a Doctor’s thesis “Forensic psychiatric assessment of persons who have committed a crime of sexual nature”. In order to achieve the goal of the study, the author analyzed 287 cases of forensic psychiatric examinations in relation to subjects who committed sexual offenses and were on forensic psychiatric examinations of an expert institution from the years 2000 up to 2015 (16 years).

In order to determine the relationship between the degree of violation of the ability to be aware of their actions and to guide them and resolve expert issues by the author, from the group of “imputability” empirically a group of “limited imputability” was selected that was artificially formed on the basis of the domestic concept of “limited saneness”. It was established that the discovered clinical features in this scientific research can be used to determine the criteria of “limited imputability” in the forensic psychiatric evaluation of persons who committed a criminal crime of sexual nature.
Voltammetric detection of hydrochlorothiazide at molybdenum oxide modified screen-printed electrodes
Authors: Khanfar M. F. , Abu-Nameh E. S. M. , Afaneh A. T. , Saket M. M. , Ahmad A. , Faraj W. , Khalil M. , Al Khotaba H. , Al Bujog M.
Published: June 2020

Electrochemical oxidation of hydrochlorothiazide (HCT) was investigated both experimentally and theoretically to explore the connection between thermodynamics and the oxidation potential. In this work, screen printed carbon electrodes were modified with molybdenum oxide by means of voltammetry. The modified surfaces demonstrated significant sensitivity toward hydrochlorothiazide detection in pH 2.00–buffered aqueous solutions. The employed method was validated and used for hydrochlorothiazide quantification in commercial drug products. In this work, we presented results of density functional calculations for the standard reduction potential of the HCT (H)2|HCT couple in aqueous solution. After consideration of 20 density functionals with 4 different basis sets, it was found that the hybrid meta functionals provide the most accurate prediction of the reduction potential in comparison with the available experimental data. The reported reduction potential is underestimated with GGA and MGGA and is overestimated with hybrid and meta hybrid functionals. Our results highlighted the importance of including solute-solvent hydrogen bonding effects in the theoretical modeling of redox processes.

Keywords: Molybdenum oxide, Hydrochlorothiazide, Screen-printed electrodes, Electrochemical deposition, Density functional theory (DFT).
Ibuprofen/β-CD complexation by controlled annealing of their mechanical mixture
Authors: Pereva St. , Sarafska Ts. , Petrov V. , Spassova M. , Bogdanova S. , Spassov T.
Published: June 2020

Ibuprofen/β-cyclodextrin complex was formed applying a modified melting method, consisting in melting only the drug in the mechanical mixture of ibuprofen and β-cyclodextrin. The ibuprofen inclusion into β-CD was monitored by differential scanning calorimetry after initial release of the water molecules from the CD cavity and was proved by X-ray diffraction and FTIR analyses.

Keywords: β-cyclodextrin, ibuprofen, inclusion complex, melting method
Koleksiyon Toplanmasından Müze Yapılarına Geçiş Aşamaları ve İlk Müze Okulu (İzzediniye) Açma Girişimi
Authors: UZUN AYDIN Derya
Published: June 2020

İnsanoğlu, erken tarihlerden itibaren önemli eşyaları toplama ve saklama ihtiyacı içinde olmuştur. Eserlerin toplanması, korunması ve halka sunulması koleksiyonculuk anlayışından müze anlayışına giden yolu açmıştır. Neticede müzelerde yer alan hazineler de, aslında koleksiyonların ilk örnekleridir. Tarihte ortaçağ döneminde, kiliseler birer “koleksiyoncu” iken yerini sonradan soylulara bırakmıştır. Asıl “müze koleksiyonu” kavramı da Rönesans evresiyle önem kazanmıştır.
19.yüzyılda daha da önem kazanan ve bir çeşit “koleksiyon evi” olarak görebileceğimiz müzeler, Osmanlı topraklarında da aynı ihtiyaçlardan doğmuştur. Bu yüzyıllarda doğan Osmanlı müzeciliği, Osmanlı hükümeti tarafından “Müze-i Hümayun” adıyla anılmıştır. Osmanlı müzeciliğine geçiş aşamaları da;artan ve çoğalan hazineleri toplama ve saklama gereksinimini karşılamaya yönelik olmuştur. Sıra; bu müzelere ya da koleksiyon evlerine gerekli olacakdonanımlı elemanları yetiştirmeye gelmiştir. Neticede, 1875’te Osmanlı padişahı tarafından onaylanan bir tezkere ile “müzecilik ve eski eserler alanında uzman yetiştirmek” amacıyla bir müze okulu yani “Müzeyi Hümayun Mektebi-İzzediniye” açılması planlanmıştır. Böylelikle kazı yapabilecek, eser toplayabilecek ve bunları koruyabilecek kişiler (bir çeşit koleksiyoncu) yetişmiş olacaktır. Ancak bu okul, tüm çabalara rağmen eğitime başlayamamış ve sonrasında da yerini “Sanayi-i Nefise Mektebi”ne bırakmıştır.
Orientation Effect on Statics and Natural Frequency of Cantilever Beam
Authors: Noerpamoengkas Ardi , Ulum Miftahul , Ismail Ahmad Yusuf
Published: June 2020

Statics and frequency analyzes are important because the structure can support the static and dynamic loads. Most previous studies of statics and frequency did not involve the gravity load. The previous studies of gravity effect to the cantilever beam included the hanging, horizontal, and inverted positions. The gravity load direction is applied referred to the longitudinal and lateral beam directions in this study. The closer to the inverted position the smaller the natural frequency. The highest values of the maximum displacement and the maximum Von-Mises stress are happened if longitudinal position is horizontal and lateral orientation angle is 0°. The change of lateral orientation angle does not influence the natural frequency in this condition. Keywords—Cantilever beam, gravity load, natural frequency, orientation angle, statics
EFEKTIVITAS PERAWATAN UNIT BOILER: STUDI KASUS DI PT. BEURATA SUBUR PERSADA
Authors: Saputra Maidi , Kurniawan Redha , Munawir Al
Published: June 2020

A boiler is a tool used to produce steam that is used for various purposes in palm oil mills. In a boiler system, the readiness and conditioning of the equipment are considered to meet the planned production targets. Maintenance, in particular on a boiler unit, is something that must be considered and essential to implement. This study aims to get an overview of the maintenance of the boiler unit at PT. Beurata Subur Persada. This research uses several methods in getting the desired results, including descriptive data collection/field interviews, from the observation and interview process with PT. Beurata Subur Persada, the planning of the maintenance process by factory conditions, is planned maintenance. Keywords: Boiler, Palm oil mills, Maintenance, Planned maintenance, PT. Beurata Subur Persada
Peningkatan Kualitas Manajemen Pendidik dan Tenaga Kependidikan di PAUD
Authors: Jf Nurul Zahriani , Latif Muhammad Abdul
Published: June 2020

Artikel ini mengkaji tentang peningkatan kualitas manajemen pendidik dan tenaga kependidikan di PAUD (Pendidikan anak usia dini). Manajemen adalah salah satu upaya untuk mengelola PAUD menjadi lembaga yang bermutu dan mencipatakan generasi yang siap untuk menghadapi langkah-langkah selanjutnya dalam kehidupannya. Peningkatan kualitas manajemen dibutuhkan untuk meningkatkan kualitas pendidik dan tenaga kependidikan, sehingga proses pelaksanan kegiatan di lembaga pendidikan anak usia dini berjalan secara maksimal serta efektif dan efesien. Metode yang digunakan dalam penelitian ini adalah Library Research dengan menelusuri kajian-kajian yang keterkaitan dengan artikel ini baik berupa hasil penelitian ataupun kajian dalam bentuk lain. Hasil penelitian menunjukkan peningkatan kualitas manajemen pendidik dan tenaga kependidikan perlu memperoleh pelatihan-pelatihan teknis dalam penyelenggaran administrasi penyelenggaraan pembelajaran dalam lembaga pendidikan anak usia dini sehingga layanan pendidik dan tenaga pendidikan akan lebih berkualitas dan akan lebih optimal sesuai harapan masyarakat. Peningkatan kulialitas ini mengarah  pembangunan pendidikan yang bermutu, membentuk pendidik dan tenaga kependidikan yang handal, produktif, kreatif, dan berprestasi.
METODE DRILL DALAM PERENCANAAN PEMBELAJARAN MATEMATIKA DI SEKOLAH DASAR
Authors: Nurhasanah Nurhasanah
Published: June 2020

Penelitian bertujuan untuk meningkatkan hasil belajar siswa mata pelajaran Matematika Penggunaan metode prosedur pelaksanaanya terdiri dari empat langkah pada setiap siklusnya, yaitu perencanaan, pelaksanaan, pengamatan dan refleksi. Instrument yang digunakan yaitu lembar kerja siswa (LKS), lembar observasi siswa, lembar pengamatan guru, alat evaluasi hasil belajar dan lembar fefleksi, yaitu pernyataan-pernyataan berupa panduan untuk mengetahui pendapat teman sejawat. Kegiatan pembelajaran tidak hanya menilai hasil tetapi juga proses. Ini terlihat dalam kemampuan siswa dalam melakukan pembelajaran Matematika tentang penjumlahan dan pengurangan pada bilangan pecahan. Setelah dilakukan perbaikan-perbaikan proses pembelajaran dengan menerapkan Metode Drill hasil belajar siswa menunjukkan adanya perubahan yang signifikan
Hubungan Kecerdasan Logis-Matematis dan Motivasi Belajar dengan Kemampuan pemecahan Masalah Peserta Didik Kelas XI SMA Negeri 14 Sinjai
Authors: Usman U.
Published: June 2020

Penelitian ini bertujuan untuk mengetahui dan mendeskripsikan hubungan antara kecerdasan logis-matematis dan motivasi belajar terhadap kemampuan pemecahan masalah, baik secara sendiri-sendiri maupun secara bersama-sama. Sampel yang digunakan berjumlah 55 orang yang ditentukan simple random sampling. Pengukuran terhadapmotivasi belajar menggunakan instrumen angket model skala likert dengan rentangan skor 1-5. Kecerdasan logis-matematis dan kemampuan pemecahan masalah diukur dengan instrumen tes. Data penelitian diolah dengan teknik regresi sederhana, regresi ganda dan korelasi taraf signifikansi α = 0.05.Hasil penelitian menunjukkan (1) terdapat hubungan yang positif antara kecerdasan logis-matematis dan kemampuan pemecahan masalah peserta didik kelas XI SMA Negeri 14 Sinjai dengan kontribusi sebesar 15,8%; (2) terdapat hubungan yang positif antara motivasi belajar dan kemampuan pemecahan masalah peserta didik kelas XI SMA Negeri 14 Sinjai dengan kontribusi sebesar 23,2 %; (3) terdapat hubungan yang positif antara kecerdasan logis-matematis dan motivasi belajar dengan kemampuan pemecahan masalah peserta didik kelas XI SMA Negeri 14 Sinja dengan kontribusi sebesar 25,8 %. Hasil ini menunjukkan bahwa kecerdasan logis-matematis dan motivasi belajar memberikan pengaruh dalam mendukung kemampuan pemecahan masalah peserta didik, meskipun  pengaruh yang diberikan rendah diakibatkan banyaknya faktor lain yang lebih besar mendukung kemampuan pemecahan masalah peserta didik.
Pengembangan Media Pembelajaran Biologi Menggunakan Teknologi Augmented Reality (AR) Berbasis Android pada Konsep Sistem Saraf
Authors: Aripin Ipin , Suryaningsih Yeni
Published: June 2020

Augmented Reality (AR) merupakan teknologi terkini yang dapat menjadi solusi bagi pendidik untuk menyajikan pembelajaran yang inovatif, informatif, menarik, dan dapat menyajikan objek maya secara virtual 3D dalam bentuk nyata serta disajikan secara real time (waktu nyata), sehingga mampu menyajikan konsep abstrak menjadi lebih nyata. Penelitian ini bertujuan untuk mengembangkan aplikasi pembelajaran Biologi menggunakan teknologi AR berbasis Android pada konsep sistem saraf yang layak dan efektif digunakan dalam pembelajaran Biologi.  Metode penelitian pengembangan yang digunakan pada penelitian ini adalah model pengembangan menurut Akker dengan empat tahapan, yaitu tahapan penelitian pendahuluan (Preliminary Research), tahapan prototipe (Prototyping Stage), tahapan evaluasi sumatif (Summative Evaluation) serta refleksi sistematik dan dokumentasi (Systematic Reflection and Documentation). Instrumen penelitian yang digunakan terdiri atas tes (penguasaan konsep) dan non tes (lembar penilaian ahli, angket, dan wawancara).Data kemudian dianalisis secara kualitatif dan kuantitatif. Hasil penelitian menunjukkan bahwa media pembelajaran Biologi berbasis AR yang dikembangkan menurut penilaian ahli termasuk  layak (valid) digunakan dengan ketegori sangat baik untuk aspek media, kategori baik untuk aspek konten, dan kategori sangat baik untuk aspek pedagogik. Berdasarkan hasil implementasi dalam pembelajaran Biologi media AR yang dikembangkan tergolong efektif dan dapat meningkatkan pencapaian ketuntasan belajar siswa sebesar 76%.
Evaluation of the depressive state of mobile technical systems operator subjected to electromagnetic noise radiation
Authors: Sidorenko A. V. , Saladukha M. A.
Published: June 2020

This paper presents the results of the work aimed at a study of the patterns of changes in the nonlinear electroencephalogram (EEG) parameters, including fractal dimension and self-similarity exponent, when the operator is irradiated with electromagnetic noise radiation. Together with the above-mentioned nonlinear parameters, a change in the spectral power density of the rhythmic components in EEG (delta-, theta-, alpha-, and beta-rhythms) has been studied. Investigation of the fractal dimension, self-similarity exponent, and spectral power density during irradiation was associated with possible changes of the parameters in the case of operator’s depression or minor depression. The radiation source was represented by a transistor electromagnetic-noise generator with the power of 30 mW operating over the frequency range of 5 GHz. The methods for calculation of the nonlinear parameters including fractal dimension and self-similarity exponent have been described. To realize the principal objectives of the work, the Java-based software was developed. The relevant literature demonstrating the changes in fractal dimension, self-similarity exponent, spectral power density of the delta-, theta-, alpha-, beta-rhythms in the case of depression and minor depression has been reviewed. Electroencephalograms were registered according to the “10/20” scheme using the MBN Neurocartograph electroencephalograph. The analyzed leads were Fp1, Fp2, T3, T4, P3, P4, O1, O2, F3, F4, C3, C4. As shown by the results of this work, there is no distinct depressive state of the operator exposed to electromagnetic noise radiation, judging by changes in the self-similarity exponent, fractal dimension, and spectral power density. However, when the operator was irradiated with electromagnetic noise radiation, the observed tendency in variation of the parameters was characteristic for minor depression.
Mel de abelhas na alimentação de estudantes e servidores do IF Baiano campus Governador Mangabeira
Authors: Silva Marília Dantas e , Lima Ana Paula Oliveira , Costa Cristiane Oliveira
Published: June 2020

Dos produtos fornecidos pelas abelhas, o mel é o mais conhecido e difundido. Foi um dos primeiros alimentos do homem, e praticamente todas as civilizações antigas o utilizaram como alimento e recurso medicinal. O presente trabalho teve como objetivo avaliar a utilização do mel de abelhas, por estudantes e servidores do Campus do IF Baiano de Governador Mangabeira e sensibilizar os mesmos sobre a importância do uso do mel. A coleta de dados ocorreu entre novembro de 2018 e março de 2019, através da aplicação de entrevistas estruturadas com 100 pessoas. Foi possível diagnosticar que 68% dos estudantes e 62% dos servidores informaram ter o hábito do consumo do mel, sendo que utilizam com maior frequência quando estão doentes. No Brasil o consumo per capita anual de mel é de apenas 300g. Quando foi questionado sobre o que motivaria esse baixo consumo, os estudantes (43%) indicaram que a falta de costume do uso do mel seria o motivo para essa realidade. Já 50% dos servidores informaram que a falta de conhecimento sobre a importância do mel seria a principal razão. Em relação às atividades de sensibilização no Campus foram realizadas 11 palestras, uma oficina para a preparação de receitas à base de mel e a produção de uma cartilha informativa sobre mel. Todas essas ações foram muito positivas e acredita-se que contribuíram para um aumento no consumo do mel, que é um alimento altamente nutritivo, e que pode substituir os adoçantes industrializados com a mesma eficiência de sabor e de forma muito mais saudável.
Comparative effect of Rhizophagus irregularis strain on cassava root development and Phosphorus uptake under acidic soils conditions of Walungu territory, Eastern DR Congo.
Authors: Byamungu Ndeko Adrien , Chuma Basimine Geant , Mukengere Bagula Espoir , Mugumaarhahama Yannick , Nabintu Ndusha Bintu , Rehema Pierrette , Mushagalusa Nachigera Gustave
Published: June 2020

Objective: In the highlands of South-Kivu province of DR Congo, cassava is grown on marginal land not suitable for other crops. Walungu territory for instance is dominated by acidic soils and has the highest nutrient depletion rate in the country. On such types of soil, nutrient depletion is accompanied by a decrease in the availability of phosphorus and many other nutrients. The use of Arbuscular mycorrhizal fungi (AMF) would therefore be an alternative to improve the phosphate nutrition of cassava under different soil conditions.
Methodology and results: The experiment reported in the current study was conducted in pots under semi-controlled conditions. Ferrallitic soil from Walungu was used. Soil was sterilized or not and then inoculated with the AMF Rhizophagus irregularis (RI) strain. Results showed that inoculation with an exotic AMF strain (Rhizophagus iregularis) has significantly increased root abundance (number of roots) in both sterilized and unsterilized soil and root dry weight in sterilized soil only. However, in unsterilized soil, root dry weight decreased with AMF inoculation. In Walungu acidic soils, P supply could significantly influence the effect of mycorrhizal inoculation on root development and root abundance. AMF inoculation has significantly increased the shoot P concentration when P was supplied. In sterilized soil, mycorrhizal inoculation had a depressant effect on soil phosphorus concentration, especially when P was not supplied.
Conclusion and application of results: Our results suggest that the introduced Rhizophagus iregularis strain increases P uptake in the rhizospheric soil, especially when phosphorus is not applied to the sterilized or unsterilized soil. The use of the Rhizophagus irregularis strain as a biofertilizer could improve phosphorus nutrition and root development in cassava.
Keywords: Arbuscular mycorrhizae, Rhizophagus irregularis, P uptake, Cassava, Ferrallitic soil
Acoustical assessment of urban residential environment
Authors: Nurzyński Jacek
Published: June 2020

The quality of urban residential environment depends on several factors, acoustical conditions are among the most important. Outdoor noise affects conditions inside the building, determines required sound insulation of external walls and the whole building envelope. It defines the comfort level on balconies and terraces, and also the quality of the closest building surroundings. Recent tendencies in spatial planning, related to the sustainable development idea, as rational land use, densification of existing built-up areas, revitalization of city centers etc, have possible far-reaching acoustical consequences. Besides, the environmental management and spatial planning present quite different attitude towards assessment of residential areas in terms of acoustics. The paper examines the problem of noise just from the perspective of spatial planning and building industry. The acoustic classification scheme is proposed for residential areas. It gives clear rules for acoustical planning and appropriate urban development policy. It is also an applicable tool for investors, developes, local authorities, and above all a final user to assess real quality and adequate value of the premises.
Warm mix asphalt with zeolite additions
Authors: Kukiełka Jerzy , Woszuk Agnieszka , Franus Wojciech
Published: June 2020

In this study, preliminary results of zeolite application to reduce the compaction temperature of mix asphalt are presented and discussed. The reference mix was an asphalt concrete AC 16 W containing 35/50 penetration grade bitumen and designed for binder course. Two types of the zeolites were used for tests: natural zeolite klinoptilolit and synthetic NaP1 one. The optimal amount of zeolite addition was determined on the basis of the compactibility test results in the Marshall compactor as well as in the gyratory compactor. The results of stiffness modulus and waterproofness tests confirm the possibility to reduce the compaction temperature of asphalt mixes with zeolite additions to 1300C level.
A load capacity of cyclic loaded reinforced concrete beams
Authors: Goszczyńska Barbara , Trąmpczyński Wiesław , Bacharz Magdalena , Bacharz Kamil
Published: June 2020

In this paper, an effect of cyclic and variable loads on the capacity of reinforced concrete beams is investigated. The study was conducted on 28 reinforced concrete beams including 12 two-span beams - statically indeterminate and 16 simply supported single-span beams. Those beams were differentiated by the structure and degree of longitudinal reinforcement (two degrees of reinforcement) and load applied programs (three programs types) including the monotonic load, load with unloadings and cyclic load. The last one was taken as a sinusoidal cyclic load with 100,000 cycles carried out for three ranges of loading forces. On the basis of a comparative analysis it can be concluded that in the case of the two-span beams, the imposition of 252,000 load cycles results in 20% drop of the beam capacity. Such an effect is not observed for load with unloadings and in the case of simply supported beams.
Experimental verification of numerical model of integral bridge
Authors: Jarosz Jakub
Published: June 2020

The paper presents the results of analyses of displacements for a real reinforced concrete integral bridge. The research consisted of the measurement of vertical displacement in the middle of the span and lateral displacement of the abutment. Ten load cases were considered. Two of them concerned vehicles placed motionlessly, the rest ones – braking vehicles. Moreover, the influence of initial braking velocity was analysed. The results of research were compared with numerical simulations. Two options of numerical models were considered. In the first case, cooperation between construction of span and road layers was ignored, but in the second one it was not. In the both options, the same soil conditions were assumed.Cooperation between construction and road layers was took into consideration by the increase of stiffness of span. A real heterogeneous cross section was reduced to homogeneous one. Road layers were converted to equivalent concrete layers. Neutral axis, moment of inertia and thickness were calculated for a reduced cross section and applied into model.Relations between displacements and duration were presented for load cases with braking vehicles. Displacements due to braking forces and static load were compared.
Research on anchorages of the structural strengthening system with prestressed CFRP strips
Authors: Paśko Paulina , Piątek Bartosz , Siwowski Tomasz
Published: June 2020

The CFRP composite materials due to their excellent mechanical properties are more often used in civil engineering. In recent more than ten years has been observed e.g. much wider application of CFRP strips in structural strengthening. The research on this subject clearly showed the advantages of prestressed strips application in contrast to passive one. The CFRP utilization is much more effective in terms of strength and economy. However, the system effectiveness depends on reliability of anchoring used for prestressed strips. The main goal of the research presented in the paper was to develop a new, innovative, effective and reliable anchoring system for CFRP strips. The achievement of quite high carrying capacity of new anchorages was able thanks to combining friction, bonding and rivet clamping in one CFRP-steel joint. The research results revealed the effectiveness of new anchoring system with carrying capacity level of about 70% of the CFRP ultimate tensile strength.
Forecasting development of road technology based on the Delphi method – selected issues
Authors: Radziszewski Piotr , Nazarko Joanicjusz , Król Jan , Kowalski Karol , Sarnowski Michał
Published: June 2020

An objective of this research project is an analysis of development directions of new materials, technologies and pavement structures used in road industry, taking into account special environmental conditions and sustainable development rules. Results of the first round of conducted study based on the foresight method are described in this paper. Such results are helpful to provide support for making a long term strategy decisions by the government. Selected results and analysis in the scope of identification of the main research areas and hypothesis connected with developments of road technology are shown in this paper with a special focus on the construction of the durable pavements. It was found that the most important task is related to developments of the asphalt and cement pavements technology providing at least 30 years durability period. The construction of such pavements is possible only when high quality of work is provided and there is further road technology development as a result of the science and industry cooperation.
Experimental investigations of punching shear concrete slabs with different types of transverse reinforcement
Authors: Urban Tadeusz , Krawczyk Łukasz , Gołdyn Michał
Published: June 2020

The results of support zone thick concrete slabs experimental investigation are presented in the paper. The experimental program consisted of 4 square reinforced concrete flat models to 1:2 scale made of the same concrete with the same dimensions and the same flexural reinforcement. The aim of tests was proved the influence of different transverse reinforcement types on punching shear load capacity. One of the models was a comparative slab made without transverse reinforcement. In the other slabs three types of transverse reinforcement were used: typical stirrups enclosing flexure reinforcement, stirrups situated between flexure reinforcement and ladders. The test results show a few percent difference in load capacity between models with transverse reinforcement, the most effective were typical stirrups enclosing the main reinforcement.
Corrugated sheet as a bracing of flat truss chords at their out-plane buckling
Authors: Biegus Antoni
Published: June 2020

Corrugated sheet properly connected with the upper chord of the flat truss can be taken into account in the assessment of the out-plane stability of the upper and bottom chord as well. The term of lateral bracing by the corrugated roof sheeting in purlinless truss chords was discussed. The calculation models for assessment of the lateral supporting of the bottom truss chords a as the flexible restraint in the roof corrugated sheets were given. The procedures of the assessment of resistance due to out-plane buckling of the bottom truss chord braced by roof sheeting were presented.
Parametric study on the rotation capacity of stiffened end-plate beam-to-column connection
Authors: Ostrowski Krzysztof , Kozłowski Aleksander
Published: June 2020

Rotation capacity is one of the joint parameters needed to be taken into account of the real joint behaviour in a global analysis. It has a special influence on the plastic design of steel frames. The results of the parametric study of the stiffened bolted end-plate beam-to-column connection have been presented in the paper. The main investigated parameters are: thickness of end plate “tp”, horizontal bolt spacing “w” and distance of the bolt to plate edge “cg1”. The analysis was performed with the use of finite element method, based on the numerical experiment plan.
Study of the zero shear viscosity of SBS copolymer modified bitumens
Authors: Słowik Mieczysław , Andrzejczak Marta
Published: June 2020

The paper presents the results of the zero shear viscosity (ZSV) determined by using a dynamic shear rheometer (DSR). The tests were conducted with the use of 50/70 penetration grade bitumen produced from Venezuelan and Russian crude oils (named V50/70 and R50/70, respectively). Specimens of the tested polymer modified bitumens were combined with modified bitumen concentrate (containing 9% of SBS copolymer) by mixing them together. The objects of the tests were modified bitumens containing 1.5%; 3.0%; 4.5%; 6.0% and 9.0% of SBS copolymer. Zero shear viscosity (ZSV) was determined with the use of two methods: the creep method at various levels of shear stress in the time sequence and a method in which kinematic, sinusoidal angular deformation was applied. The tests were conducted at a constant temperature of 60˚C. The results of two ZSV tests gave similar findings for 50/70 penetration grade bitumen and modified bitumen with low SBS copolymer content (1.5%). In the case of modified bitumen with higher SBS copolymer content, i.e. 3%; 4.5%; 6%; 9%, zero shear viscosity determined by two methods gave different results.
Application of FT-IR technique to bituminous materials
Authors: Zofka Adam , Maliszewska Dominika , Maliszewski Maciej
Published: June 2020

Spectroscopy is a fundamental method used in the material science that relies on the interaction of the electromagnetic radiation with a matter. Infrared spectroscopy allows for material fingerprinting as well as detection and quantification of compounds in a sample. In principle, IR spectrometers record the absorption of electromagnetic energy by chemical bounds in a sample as a function of wavelength. Chemical bounds have unique spectra bands at specific wavelengths regardless of the composition of the remaining molecular structure. The absorbance at these specific wavelengths can be used to quantify a particular functional group in the analyzed material. Absorbance peaks are easily identified on the IR spectra and can be used to fingerprint a compound in a mixture, especially when compared to the original unmodified IR spectra. In the recent years, the FT-IR method has become a popular tool for the quality assurance in the practical applications as well as it became a very useful tool in studying various construction materials, e.g. portland cement, bitumen, etc.