bluuebunny/crossref_metadata_2025 huggingface dataset:
Predicting Frequent and Feared Crime Typologies: Individual and Social/Environmental Variables, and Incivilities
Authors: Caridade Sónia , Magalhães Mariana , Azevedo Vanessa , Dinis Maria Alzira Pimenta , Maia Rui Leandro , Estrada Rui , Sani Ana Isabel , Nunes Laura M.
Published: March 2022

The lack of organisation in urban spaces plays a decisive role in the level of integration, communication and social bonds of the residents, impacting the citizens’ feelings of trust and security. Different personal variables and contextual characteristics have been associated with the fear of crime (FOC). The main objective of this study is to analyse how individual and social/environmental variables, and incivilities, predict crime against people and property, crime that has either happened or is feared to happen. Five hundred and fifty-four residents (M = 43.82; SD = 18.38) in the Historic Centre of Porto (HCP), Portugal, answered 61 items of the Diagnosis of Local Security (DLS) Questionnaire. The results of this study show that in the most frequent crime category, 72% of occurrences represent crime against property. In the feared crime category, there is a preponderance of crime against people (61%). Age of the respondents predicted the most frequent and feared crime, while sex predicted the most feared crime only. Social/environmental variables, as well as incivilities, also predict the frequent and feared crime in two typologies, i.e., crime against people and crime against property. Practical implications to reduce FOC and areas for further investigation are discussed.
The Role of the Hypothalamus–Pituitary–Adrenal (HPA) Axis in Test-Induced Anxiety: Assessments, Physiological Responses, and Molecular Details
Authors: Hinds Jenalee A. , Sanchez Edwin R.
Published: March 2022

Test anxiety may be a contributing factor to low-performing examination scores among students. There can be numerous physiological responses in the body that lead to test anxiety. One is the body’s response to stress, which activates the brain to release hormones that stimulate central and peripheral nervous responses. The hypothalamus–pituitary–adrenal (HPA) axis is a known responder during stress, causing an elevation of cortisol in the blood, a glucocorticoid (GC) hormone that affects sympathetic nervous responses. Stressors during testing include the method of information delivered, prior knowledge of the subject material, emotional state, or how accurately the student can retain knowledge. A student’s emotional state of mind is essential and may cause hyperactivation of the HPA axis during stress encountered during testing, exacerbating cortisol levels and nervous responsiveness. This review discusses the potential involvement of the HPA stress axis on an individual’s performance during testing and assessment.
ANALYSIS OF THE AXIAL TENSILE STRENGTH OF MASONRY MADE OF AUTOCLAVE-HARDENED CELLULAR CONCRETE BLOCKS ON VARIOUS MORTARS AND ADHESIVE COMPOSITIONS
Authors:   National Research Moscow State University of Civil Engineering, DZHAMUEV B.K.
Published: March 2022

The article presents the results of a comparative analysis of the axial tensile strength of masonry made of autoclaved cellular concrete blocks with cement mortars of various grades and polyurethane adhesive compositions of various manufacturers. The tests were carried out on prototypes made of two cubes of 150x150x150 mm glued together. As cellular concrete, blocks of autoclaved hardening of the compressive strength class B1.5, B2.5, B3.5 were used. M200 and M300 cement mortars, "Tytan Professional”, "Technonicol", "Bonolit" and “KUDO” foamed polyurethane glues were used as a binder. The experiment was performed in the Laboratory of the Department of Reinforced Concrete and Masonry Structures of the Moscow State University of Civil Engineering. On the basis of the experiment, the values of the increase in the strength of the masonry under axial tension were obtained depending on the binder.
SELECTION OF CONCRETE FORMULATIONS FOR THE CREATION OF SOIL-CEMENT PILES IN DIFFICULT ENGINEERING AND GEOLOGICAL CONDITIONS
Authors:   Engineering company Mosinzhproekt, DOLEV A.A. , ALEKSEEV V.A. ,   Department of Computer Science, BAZHENOVA O.YU. ,   National Research Moscow State University of Civil Engineering
Published: March 2022

Strengthening of soils by jet technology in difficult ground conditions has now become widespread, including in the construction of buried and underground structures. At the same time, a sufficient amount of experimental data has accumulated to predict the properties of the resulting soil cement. The purpose of the work is to determine the optimal consumption of materials for soil-cement structures, taking into account complex engineering and geological conditions. The study of mineral-based hardening systems in water-saturated soils with inclusions of organic deposits or in conditions of high filtration has a number of features that make it difficult to assign optimal technologies and components of cement-based solutions for the formation of soil cements. To determine the final parameters of soil cement, the parameters of soil cement piles at the facilities during the construction of the subway, laboratory data on mixing mineral components and soils of different types, scientific and technical data were analyzed.
MODIFICATION OF LOW-QUALITY CLAY-STOCK RAW MATERIALS WITH NANOSILICA GEL AND ITS INFLUENCE ON THE PROPERTIES OF CERAMIC SHARD
Authors:   Novosibirsk State University of Architecture and Civil Engineering (Sibstrin), ILINA L.V. , TACKY L.N. ,   Novosibirsk State University of Architecture and Civil Engineering (Sibstrin), ULYANOVA O.V. ,   Novosibirsk State University of Architecture and Civil Engineering (Sibstrin)
Published: March 2022

In connection with the prospects for growth in the volume of construction of individual residential buildings, the demand for facing ceramic bricks and large-format porous wall blocks is increasing. With a shortage of high-quality clay raw materials for the production of plastic molded ceramic bricks, it is recommended to switch to the production of semi-dry pressing products. An important task is to increase the strength of ceramic bricks, both carrying a load in the wall and performing a heat-insulating role. It is recommended to introduce an aqueous solution of nanosilica gel into the charge. The main raw material was non-caking dusty loam of the Verkh-Tulinskoye deposit, containing more than 70% of dusty fractions (5-50 microns). As an additive, we used Lakesil-30 nanosilica gel produced by the Compass Scientific and Technical Center (Kazan). In the article, the authors used both standard research methods and modern methods of X-ray phase analysis to establish the material composition of a ceramic shard. It has been established that, at optimal prescription and technological parameters, the introduction of Lakesil-30 gel with mixing water into the raw mixture increases the strength limit by 32.8% compared to the non-additive composition, without affecting the average density and water absorption of the ceramic shard. ... The quantitative phase composition of the shard has been studied. It has been experimentally established that the strength of a ceramic shard is increased due to the use of an additive of Lakesil-30 nanosilica gel in an optimal dosage. To ensure the maximum strength of the ceramic shard, it is necessary that the processes of interaction of the aqueous solution of the additive with the clay component are completed during firing.
CAUSES OF DAMAGE TO MASONRY AFTER RESTORATION
Authors:   OOO « PI Georekonstrukcia», ORLOVICH R.B. , GORSHKOV A.S. ,   Saint-Petersburg State University of Industrial Technologies and Design, DERKACH V.N. ,   Branch office of the RUE "Institute BelNIIS" - Scientific-Technical Center, ZIMIN S.S. ,   Saint-Petersburg state polytechnical university, GRAWIT M.V. ,   Saint-Petersburg state polytechnical university
Published: March 2022

The article provides the analysis of the causes of damage in the masonry of historical buildings after their restoration. It has been established that the use of mortars of an increased grade and, accordingly, stiffness during repairs of historical masonry leads to an increase in tensile stresses in bricks under temperature and humidity effects. The reasoning behind the use of such mortars is to increase the strength and durability of the restored areas of historical masonry. The results of numerical simulation show that the masonry mortar must be sufficiently strong in compression and, at the same time, sufficiently plastic. It is shown that the use of hard mortars based on a cement binder, compared with plastic mortars based on a lime binder, on average doubles the value of normal tensile stresses at a temperature difference ∆Т=+100С.. This effect is much higher when stones swell due to their moisture. According to the results, for restoration work with brickwork, one should use mortars in accordance with the technology corresponding to this historical period, i.e., lime with additives that were identified during laboratory tests of samples taken from historical masonry. Low-grade mineral solutions with a low modulus of elasticity are preferable. It increases the crack resistance of the masonry under temperature and humidity effects. The article also shows that improper jointing of masonry joints facilitates the destruction of masonry. It happens when areas of accumulation of rainwater are formed, leading to increased wetting of stones in areas of direct impact of rainfall.
THE RELATIONSHIP OF DEFLECTIONS AND FREQUENCIES OF NATURAL TRANSVERSE VIBRATIONS OF CIRCULAR ISOTROPIC PLATES OF VARIABLE THICKNESS ACCORDING TO THE LAW A SQUARE PARABOLA WITH A THICKENING TO THE CENTER
Authors:   Orel state University named after I. S. Turgenev, TURKOV A.V. ,   South-West State University, POLESHKO S.I. ,   Orel state University named after I. S. Turgenev, FINADEEVA E.A. ,   Orel state University named after I. S. Turgenev, MARFIN K.V. ,   Orel state University named after I. S. Turgenev
Published: March 2022

The relationship between the maximum deflections W0 from a static uniformly distributed load q and the fundamental frequency of natural transverse vibrations ω of a round isotropic plate of variable thickness according to the law of a square parabola with a thickening in the center under homogeneous conditions of support along the outer contour, depending on the ratio of the thickness of the plate in the center to the thickness along the edge, is considered.According to the results of the study, graphs of the dependence of the maximum deflection and the frequency of natural vibrations of the plate on the ratio t2/ t1 are constructed. It is shown that for round plates of linearly variable thickness at t2/t1≤1.1, the coefficient K with an accuracy of 5.29% coincides with the analytical coefficient for round plates of constant thickness.
DEFORMATION OF FIBER CONCRETE UNDER A SINGLE DYNAMIC IMPACT TAKING INTO ACCOUNT THE INFLUENCE OF INITIAL STRESSES FROM THE STATIC LOAD
Authors:   National Research Moscow State University of Civil Engineering, SAVIN S.Yu. ,   Research Institute of Construction Physics of the Russian Academy of Architecture and Construction Sciences, MEDYANKIN M.D. ,   National Research Moscow State University of Civil Engineering, SHARIPOV M.Z. ,   National Research Moscow State University of Civil Engineering
Published: March 2022

An analysis of the experimental studies presented in the scientific literature indicates that the strength and deformability of fiber-reinforced concrete under dynamic additional loading may depend on the initial level of stresses caused by a preliminarily applied static load. In this regard, the purpose of this study was to build improved models of fiber-reinforced concrete deformation of operated fiber-reinforced concrete structures of bearing systems of buildings and structures during their dynamic additional loading, taking into account the nonlinearly elastic law of material deformation at the stage of loading with a static load, as well as changes in the parameters of viscous resistance during loading. As a model of the force resistance of fiber-reinforced concrete of loaded fiber-reinforced concrete structures during their dynamic additional loading caused by an emergency situation, the Kelvin-Voigt model for an elastic-viscous body was adopted. On the basis of the adopted model, an analytical solution of the differential equation of uniaxial compression of fiber-reinforced concrete was obtained under its single dynamic additional loading from an arbitrary level of initial stresses acting in it from a previously applied static load. A step-iterative approach to determining the parameters of state diagrams of fiber-reinforced concrete under static-dynamic loading conditions is proposed. An analysis of the obtained dependences between stresses and strains shows that an increase in the level of initial stresses acting in a compressed concrete element at the moment a dynamic load is applied to it leads to a decrease in the dynamic strength of concrete with the same impact parameters.
A Bibliometric Analysis of Nanocrystalline Cellulose Synthesis for Packaging Application Research Using VOSviewer
Authors:   Departemen Kimia, Universitas Pendidikan Indonesia, Indonesia, Sari Maulidah Gusnine , Bayu Dani Nandiyanto Asep
Published: March 2022

Nanocrystalline cellulose is a type of renewable nano material that has many beneficial properties and has applications in various fields, one of which is packaging. This study aims to present an analytical map of studies in the manufacture of nanocrystalline cellulose using VOSviewer software. Based on the keywords “synthesis nanocrystalline cellulose” and “packaging application”, there were 500 related articles published in the 2017-2021 range. The results of the analysis show that the number of research articles on nanocrytalline cellulose synthesis has increased significantly every year. This is due to the need for new environmentally friendly and biodegradable materials for packaging. This research is expected to be a reference for researchers in determining the research topic to be carried out
Determining the Stopping Point on GPS Data Using Density Based Spatial Clustering of Application with Noise and Gaussian Mixture Model Cluster
Authors: Faeni You Ari
Published: March 2022

GPS data is an interesting thing to research. Various studies have been conducted to find information based on GPS data. In this paper, we propose a novel model for determining the stopping point on a GPS data for cases of human movement without using transportation modes. Further, this information can be used to determines human behavior such as fraud and favorite spot. The GPS data used in this research is the travel data of the SUSENAS survey officers at the time of updating the census block for 27 households. Density Based Spatial Clustering Of Application With Noise (DBSCAN) And Gaussian Mixture Model (GMM) Clustering model is used to create the model. The model made using a flowchart and applied to the GPS data that has been collected. The results of the developed model show that the stopping points generated using the DBSCAN cluster model are better than the stopping points generated using the GMM cluster model. Furthermore, the results of this study will be used to make model of surveyor fraud.
Mapping of the Reading Literacy Activity Index in East Java Province, Indonesia: an Unsupervised Learning Approach
Authors: Al Azies Harun , Rositawati Ayu Febriana Dwi
Published: March 2022

One of the educational problems that must be faced by East Java Province is the low reading culture of the community. The level of reading culture can be indicated by the Reading Literacy Activity Index (Alibaca Index). Alibaca Index of East Java is only 33.19 which value is included in the low category. So, this research uses the indicators that compose the Alibaca Index to classify regencies/cities in East Java Province. The analysis process carried out in this research uses one of the unsupervised learning algorithms, namely the K-Means algorithm. Analysis using the K-Means algorithm for grouping regencies/cities in East Java Province based on the indicators that compose the Alibaca index gives the results that the regencies/cities of East Java Province are divided into 3 clusters based on the optimal number of clusters according to the result of the elbow and silhouette method. Cluster 1 consists of 20 regencies and cities, cluster 2 consists of 10 regencies, and cluster 3 consists of 8 cities. Each cluster has different characteristics, cluster 1 is the cluster with the lowest skill dimension, while the cluster 2 area is an area that dominates the access dimension, alternative dimension, and cultural dimension, meanwhile, the third cluster does not have dominance in these 3 dimensions, which means that cluster 3 is the government's priority for improving reading activities, so the result of the analysis can help the government to develop strategic policies to achieve educational equity, especially concerning literacy levels based on the characteristics of each regency/city in East Java Province.
Data Collection Improvement: Daily Self-Enumeration Accommodation Survey
Authors: Setyadi Ignatius Aditya
Published: March 2022

Until now, BPS - Statistics Indonesia has conducted monthly accommodation surveys both for the star and non-star accommodation categories to provide information on commercial accommodation activities at the national and regional levels. Both star and non-star accommodation categories are done by complete enumeration in each region. Statistics include guest night and room capacity to obtain the occupancy rate of a hotel room. The data contains daily accommodation information that is collected every month, so then it will be entered completely in each region following the observation month. Due to the timeliness requirements for monthly press releases, BPS has implemented online data entry since 2017. It may seem obvious, regions that have more interest will have an impact on a bigger number of accommodations, which also affects the number of enumerators and may lead to such problems especially in response burden. Unfortunately, the same problem is also not easily avoided by regions with less accommodation, mostly due to the distance issues to the accommodation area and its spread in the region. Therefore, a new data collection strategy is required to provide respondents with convenience in order to increase response rates, as well as to reduce the workload of enumerators which also leads to the lower cost. The outbreak of COVID-19 has posed unprecedented problems for National Statistical Offices (NSOs) around the world, including BPS – Statistics Indonesia. This crisis has led us to think in new ways and make decisions that will change our statistical operations in order to meet ongoing data needs even throughout the epidemic. The purpose of this paper is to discuss the evolution of accommodation surveys, which are designed to not only solve problems but also achieve objectives. Currently, there are nearly 180 active users of this self-enumeration accommodation survey for about 142 distinct accommodations across Indonesia. Moreover, this addition has proven to have succeeded in increasing the response rate average from 57.17% in 2020 to 68,35% in 2021.
Measuring The Economic Contribution of Tourism: An Improvement in Indonesia
Authors: Mun'im Akhmad
Published: March 2022

The implementation of the international standard manual is an effort made by every national statistical office (NSO) in developing its official statistics so that they have comparability at the global level. The methods recommended in the international standard manual have also been refined and adapted to other standard manuals so that the resulting official statistics are consistent with each other. Statistics Indonesia (BPS) as the Indonesian NSO adopts various international standard manuals, including the International Recommendations for Tourism Statistics (IRTS) and Tourism Satellite Accounts: Recommended Methodological Framework (TSA:RMF) 2008 manuals recommended by UNWTO in calculating the tourism contribution in the Indonesian economy. Both recommend the utilization of the supply and use table (SUT) framework that explains tourism supply-demand in measuring tourism contributions. This approach is an improvement from the previous approach which used shock analysis under input-output (I-O) framework in calculating tourism contributions. Through the supply-demand of tourism sector approach, the amount of tourism direct gross domestic product (TDGDP) is obtained which shows the contribution of tourism to the national economy. During 2016-2019, the tourism sector contributed around 4.6 – 4.9 percent to the Indonesian economy.
Impact Evaluation of Child Labor on Health in Next 7 and 14 Years in Indonesia
Authors: Hamdani Febri , Sulistyaningrum Eny
Published: March 2022

This study aims to determine the impact of child labor on children's health both in next 7 and 14 years. Using two health indicators, growth in height and lung capacity. Child labor indicator is using child working hours. Three waves of longitudinal data from the Indonesian Family Life Survey (IFLS) are used,  IFLS-3, IFLS-4, and IFLS-5.  In addition to the child labor variable as the focus of this study, other variables are also used as control. The technique of analysis used is the Instrumental Variable where the head of the household’s education as the instrument variable. The robustness check is also performed to ensure the model. The analysis shows that in next 7 years, child labor has less effect on health. Child labor negatively affects height growth but does not affect lung capacity. However, in next 14 years child labor negatively affects health, for both height growth and lung capacity. This is confirmed by the result of the robustness check, where child labor is preponderant in next 14 years than 7 years.
Application of Spatial Empirical Best Linear Unbiased Prediction (SEBLUP) of Open Unemployment Rate on Sub-District Level Estimation in Banten Province
Authors: Apriliansyah Apriliansyah , Wulansari Ika Yuni
Published: March 2022

The open unemployement rate is an indicator for measuring unemployment. Banten Province recorded as the highest on open unemployment rate number in Indonesia on 2018. A high open unemployment rates indicate serious problems in society. This problem must be resolved synergistically from the national level to the level of small areas such as sub-districts. However, data for the small area level has not been fulfilled due to the insufficient number of samples. We apply spatial EBLUP to estimate the open unemployment rates in the districs of Banten. Such a method of small area estimation is essential because some districts have small labor forces and direct estimation for them is not reliable. SEBLUP takes advantage of the correlation of the neighboring districts. Data that used for direct estimation is from National Labor Survey (Sakernas) and Village Potential (Podes) 2018. This research showed that SEBLUP model can increased the precision from direct estimation method or EBLUP. There are two districts that have highest category of open unemployment rate which are Curugbitung, and Koroncong
Satu Data Indonesia in Sectoral Statistics: Concept of Satu Data Metadata Framework (SDMF)
Authors: Raja Hakiki Sandhika , Adlan Chaidir Arsyan
Published: March 2022

Satu Data Indonesia is a policy contrive to encourage the problem of inadequate data governance in Indonesia. This policy makes 4 main principles, namely metadata, data standards, reference codes, and interoperability as metrics of success in its implementation. In this study, we analyze the satu data Indonesia implementation in Kutai Timur Regency. We found that the integration of the satu data principle is challenging to apply technically because sectoral data in Indonesia has 2 characteristics based on the preparation of the list of data needs, namely the centralized data list, and the decentralized data list. Decentralized data list is a list of data that is partially prepared in each agency without any coordination with other stakeholders for completing the satu data principles. To accommodating this condition, we design the Satu Data Metadata Framework (SDMF) a data standard framework that is in accordance with the conditions of data governance in Indonesia. SDMF utilizes contextual layer and discovery layer of metadata to provide temporal attribute called Satu Data Resource Identifier (SDRI) for integration purpose
Preserving Women Public Restroom Privacy using Convolutional Neural Networks-Based Automatic Gender Detection
Authors: Kristiyani Desi , Wijayanto Arie Wahyu
Published: March 2022

Personal safety and privacy have been the significant concerns among women to use and access public restrooms/toilets, especially in developing countries such as Indonesia. Privacy-enhancing designs are unquestionably expected to ensure no men entering the rooms neither intentionally nor accidentally without prior notice. In this paper, we propose a facial recognition approach to ensure women's safety and privacy in public restroom areas using Convolutional Neural Networks (CNN) model as a gender classifier. Our main contributions are as follows: (1) a webcam feed automatic gender detection model using CNN which may further be connected to a security alarm (2) a publicly available gender-annotated image dataset that embraces Indonesian facial recognition samples. Supplementary Indonesian facial examples are taken from a government-affiliated college, Politeknik Statistika STIS students' photo datasets. The experimental results show a promising accuracy of our proposed model up to 95.84%. This study could be beneficial and useful for wider implementation in supporting the safety system of public universities, offices, and government buildings.
Optimizing of restricted parking spaces – examples from the Netherlands
Authors:   IBDiM, Rymsza Barbara , Kaperczak Krzysztof
Published: March 2022

Abstract: The article discusses how to improve the efficiency of using parking areas reserved for handicapped drivers. The authors notice that by following the current regulations the use of the areas is not optimal if the demand for parking spaces is high. Thus a few examples from the Netherlands are presented: signs allowing for more flexible parking which could be used in Poland. Keywords: Transport policy; Parking spaces; People with disabilities
Perancangan Film Dokumenter Tentang Pembaganan Ikan Bilih Di Danau Singkarak
Authors: Andika Randy Riski
Published: March 2022

Sebagai ikan endimik di Danau Singkarak Sumater Barat yang kaya nilai ekonomis. Ikan bilih (mystacoleucus padangensis) setiap tahun cenderung mengalami penurunan populasinya. Hal ini disebabkan oleh berbagai factor baik factor alam maupun dari factor manusai. Salah satu Factor penyumbang kerusakan pada ekosistem ikan bilih adalah pembaganan. Metode pembaganan ini memiliki beberapa dampak buruk baik terhadapa endemic ikan bilih dan berbagai ekosistem danau singkarak lainnya. Tujuan dari perancangan ini adalah menciptakan sebuah media informasi sekaligus media edukasi untuk masyarakat sekitar berkaitan dengan dampak akibat pembaganan. Metode yang digunakan dalam perancangan ini menggunakan metode 5W + 1H. Media yang digunakan dalam perancangan ini adalah media utama dalam bentuk audio visual dilengkapi dengan beberapa media pendukung seperti spanduk, poster, stiker, pin, x-banner, t-shirt dan totebag.
Investigation of synergetic effect of adsorption and photocatalysis for the removal of tetracycline by BiFeO3 immobilized on copolymer seeds
Authors: Bilgin Şimşek Esra , Balta Zeynep
Published: March 2022

The utilization of powdered photocatalysts can cause problems such as agglomeration and difficulty in separation in conventional applications. In this work, deposition of photocatalyst particles on a co-polymeric network was suggested to solve this issue. For this purpose, ferrite type perovskite BiFeO3 particles were immobilized on the sulphonated polystyrene-divinyl benzene seeds via a facile impregnation process and the heterostructured catalyst (BFO@co-STR/DVB) exhibited boosted removal performance towards tetracycline antibiotic. The co-polymer itself showed attractive adsorption (93% removal) towards tetracycline due to the robust π–π stacking or hydrophobic relationship. The photocatalytic performance of optimal BFO@co-STR/DVB catalyst had the greatest value of apparent rate constant (0.037 min-1), which was 6.16 times higher than that for bare BiFeO3 (0.006 min-1). Moreover, the heterostructured photocatalyst displayed the highest catalytic efficiency as 98.5% which was mainly assigned to the synergetic effect of adsorption and photocatalysis. Therefore, detailed adsorption mechanism was examined by applying three kinetic models and the pseudo-second order model (qe=88.9 mg/g; R2=0.993) was fitted well describing well the adsorption. The impact of perovskite amount on the polymer structure was also investigated. Apart from tetracycline molecule, the photocatalytic activity of the heterostructured catalyst with respect to different pharmaceutical (isoniazid) was also investigated and the adsorptive removal of isoniazid over the co-STR/DVB polymer was calculated as 80.0% while it significantly increased to 98.2% in the BFO@co-STR/DVB photocatalytic system. This study demonstrated the effective utilization of the perovskite deposited co-polymeric network in the field of “photocatalysis”.
Production of liquid fuel from co-pyrolysis of jatropha cake with tyre waste
Authors: Babajo Sulaiman
Published: March 2022

This paper introduces the technique that can be used to produce liquid fuel in high quantity, and the technique is called co-pyrolysis technique. Co-pyrolysis is a process which involves two or more materials as feedstock. To the best of my knowledge, there have not been any research about the co-pyrolysis of Jatropha seed cake with tyre waste. The feedstock materials were Jatropha cake and tyre waste. The characterization of the feedstock materials were carried out based on proximate and ultimate analysis. The Jatropha cake with tyre waste were in particle form and were pyrolyzed in an externally heated fixed bed reactor with nitrogen as an inert gas. The reactor was heated by means of electrical furnace. The products of the experiment were: liquid fuel, char and gas. The ratio of jatropha cake to tyre waste materials were 1:1, 1:2 and 1:3 respectively. The parameters that has more influence on the production of liquid fuel yields includes: feed ratio, temperature and reaction time. The maximum liquid yield obtained from the co-pyrolysis of Jatropha cake with tyre waste was 68.0 wt% (that is at the parameters of: feed ratio 1:1, temperature 500 oC and reaction time of 45 minutes).
Characterisation study of solid wastes: A case of districts in Tekirdağ
Authors: Güneş Elçin , Gümüş Bayındır Kübra , Aydın Nesli , Cifci Deniz İzlen
Published: March 2022

In this study, solid waste characterisation of high-income, middle-income, low-income regions and market areas in Tekirdağ Metropolitan Municipality was carried out in winter and summer, 2016. As a result, the amount of organic wastes (kitchen wastes, park and green wastes) and packaging waste (paper, cardboard, bulky cardboard, plastics, glass, metals and bulky metals) in Tekirdağ were determined as 41.02% and 32.4% respectively, by waste sampling. When waste characterisation was analysed based on the districts, it was seen that paper and plastic waste is mostly produced from the Çorlu district. The reason for this could be the high level of welfare of the citizens living in Çorlu and the high number of working people compared to other districts due to the high density of industrial facilities. It was also seen that the ash percentage of waste is high in the districts of Hayrabolu, Şarköy, Muratlı, Marmaraereğlisi, Malkara and Saray, which are the districts not covered by natural gas distribution grid. Waste samples were characterised in the Tubitak Energy Institute Laboratory to determine the moisture content, calorific value and glow loss. The results showed that there is a high moisture and organic matter in the wastes, which makes the incineration method not suitable for the treatment of solid wastes in Tekirdağ. The results of this study highlighted that there is a potential for introducing recycling schemes especially in high income regions in Tekirdağ. To initiate such programmes, collected municipal waste could be separated in two streams in place; organics and co-mingled dry-recyclables.
Degree of Pb stabilization in MSWI fly ash using size-fractionated natural fishbone hydroxyapatite
Authors: Nag Mitali , Saffarzadeh Amirhomayoun , Shimaoka Takayuki , Nakayama Hirofumi
Published: March 2022

Incineration is a common technique worldwide for treating Municipal Solid Waste (MSW). However, incineration residues (e.g., bottom and fly ash) require special treatment to prevent environmental risks due to the high content of heavy metals. The present study evaluated the stabilization degree of Pb, a toxic heavy metal in MSW incineration fly ash (IFA) treating by size-fractionated natural fishbone (FB) hydroxyapatite (HA). Bones from various fish species were used at different size fractions (<600 µm, 600 µm–2 mm, and 0–2 mm). The effect of different fishbone hydroxyapatite (FB-HA) sizes was studied by batch tests under the FB/IFA ratios of 0.0 and 1:10 (wt.), the contact or settling time of 6, 12, 24, and 672 hours, and the fixed W/S ratio of 1.5 mL/g. Using only 10% FB, Pb stabilization efficiency after 672 hours obtained 95.55% and 94.24% for FB sizes <600 µm and 600 µm–2 mm, respectively, and about 86.1% for non-fractionated FB (0–2 mm). The results indicated that contact time was the most critical factor for enhanced Pb stabilization. The FB particle size of 0–2 mm was deemed appropriate for Pb immobilization in short and long time settling periods. The adsorption isotherms were fitted well with the Langmuir and Freundlich models. The RL values of the Langmuir model were less than one and the n values of the Freundlich isotherm lie between 3 and 5, conferring the favorable adsorption of Pb to FB-HA for all size fractions.
Being, Belonging and Becoming in Africa: A Postcolonial Rethinking
Authors: Seife Kidane
Published: March 2022

This paper focuses on the nature and significance of belonging and its intersection with Identity and being in the world. Its primary impetus is to address the question of belonging as it arises in postcolonial multi-ethnic, language, religious and racial identities in Africa. Where does ethnic and national Identity intersect and diverge? It remains a highly politicised and contested issue. Narratives on African belongings provide insights into the shape and complexity of the contemporary African debate and illustrate how, in the presentation of belonging as having multiple and competing manifestations, what it is to belong per se is rendered indistinct. This exemplifies the critical problem where Belonging is concerned. While Belonging is invoked as an issue of crucial existential concern in public discourse and across a broad range of disciplines, there is an apparent and troubling lack of conceptual or linguistic apparatus. The notion can be grasped and critically analysed. Therefore, this paper seeks to explore and redress this problematic situation. Consideration of Belonging also involves Identity and thinking of how these two concepts are articulated together in theory. This latter question is explored by surveying the theoretical and conceptual frameworks from which ‘senses’ of Identity and Belonging are commonly expressed in postcolonial Africa. Belonging qua correct relation represents an entirely new way of understanding, in existential terms, what it is to belong (or not), not only in the postcolonial African context but wherever and whenever the question arises.
cuenca como soporte para la obtención de biocombustibles de primera generación
Authors: Montico Sergio , Bonel Beatriz , Di Leo Néstor
Published: March 2022

Las unidades de paisaje representan ambientes agroproductivos donde los flujos de energía determinan la productividad y la generación de energía como biomasa. La producción física agrícola representa una fuente bioenergética, dado que en base al procesamiento de granos es posible obtener biocombustibles. Los parámetros energéticos son buenos estimadores de la gestión de la energía en la producción de cultivos en distintos escenarios productivos, siendo posible obtener también la energía potencial que proveerían como biocombustibles. La obtención de biodiesel y bioetanol de los granos de soja y maíz, respectivamente, posibilita aumentar la oferta energética surgida de la producción de las unidades de paisaje en una cuenca. En este trabajo a partir de un relevamiento de las condiciones productivas de los cultivos de soja y maíz en diferentes unidades de paisaje y a través de parámetros energéticos, se realizó un análisis de la producción de energía desde el agroecosistema a la obtención del biocombustible. Se hallaron diferencias significativas en la generación de energía de los granos y de los biocombustibles entre las unidades de paisaje de la cuenca rural estudiada. Aun debe profundizarse más este enfoque para encontrar mayor precisión respecto a los balances energéticos, principalmente de la etapa industrial, tema en debate
perímetro de una cuenca hídrica: su tratamiento objetivo en la definición de índices geomorfológicos
Authors: Barrera Daniel , Presutti Miriam
Published: March 2022

Para relacionar la forma de una cuenca con su respuesta hidrológica se utilizan comúnmente índices de forma adimensionales que incluyen su área A y perímetro “suavizado”, como el coeficiente de compacidad de Gravelius. El perímetro de una cuenca depende de la resolución espacial en la que se lo determine. A fin de tornar objetivos dichos índices, proponemos reemplazar el borde de la cuenca por una poligonal de “segmentos básicos” Sb iguales y consecutivos, quedando acotado el perímetro una vez elegido dicho segmento. Además, proponemos que Sb sea función de , y los índices de forma resulten invariantes con respecto al área, permitiendo comparar objetivamente cuencas de distinto tamaño. Se varió la longitud de Sb para tres cuencas diferentes, de modo que las poligonales resultantes eliminan ciertos detalles pero preservan la forma de la cuenca. Se comprobó un buen ajuste lineal log-log entre Sb y la cantidad de segmentos en el perímetro, comprobando así que el borde de cuenca se comporta como un objeto fractal. Se analizó la variación del coeficiente de Gravelius en función de la longitud de Sb. Se propone usar Sb=1/5 para determinar los índices de forma, y Sb=1/20 para los índices que relacionan longitudes de ríos.
INTEGRATION MODEL TPB AND PERCEIVED RISK OF INTENTION OF USE APPLICATIONS AND GAMES ONLINE FREEMIUM PAID VERSION: INDONESIAN STUDENTS CONTEXT
Authors: Putra Harmanda Berima , Pradita Nungki , Mansyur Anwar
Published: March 2022

This study examines how the Theory of Planned Behavior and perceived risk can affect the intention to switch users of free versions of freemium online applications and games to use paid versions of freemium online applications and games. Data was collected using an online questionnaire which was distributed to 226 students at several universities in Indonesia. This study was analyzed using Structural Equation Modeling with Amos. The results showed that attitude proved to have a positive effect on intention. Subjective norms proved to have a positive effect on perceived behavioral control and attitudes. Perceived behavioral control has a positive effect on attitudes and intentions. Subjective norms were not shown to have a negative effect on intentions. Perceived performance risk does not affect attitudes and intentions to use freemium paid versions of online applications and games.
Educación Virtual en escenarios post pandemia
Authors: Piña-Ferrer Lenys
Published: March 2022

Educación Virtual en escenarios post pandemia
Material Nature: An Opportunistic Paradigm of Architecture & Landscape Ecology Based upon Influences of Shipping Industry Waste, Small Scale Coastal Erosion and Natural Growth
Authors:   American University of Sharjah, Farr Marcus
Published: March 2022

In “Material Nature: An opportunistic paradigm of architecture & landscape ecology”, the influences of shipping industry waste, small scale coastal erosion and natural growth become the vehicle for architectural speculation. It leverages the material waste gathered from industry and creates a new material trajectory based upon need and the aesthetic of ecology. Material Nature is a series of architectural pavilions made from a mixture of residual, off-cast materials designed specifically to be weatherized. Its design is intended to provide a useful architectural community amenity in an area of high recreational activity, while simultaneously realizing a potential for architecture to be born from waste, and to return to nature without providing further waste.
Nature Play: An Outdoor Learning Environment for Head Start
Authors:   Ball State University, Harwood Pamela
Published: March 2022

At Nature Play a 1.5-acre field has been transformed into a nature-based outdoor learning environment for the 300 preschool children at Head Start. Beyond simply getting children to play outside, we are taking play, which is culturally thought of as a recess time for teachers, into a learning environment. The central area of Nature Play is a large certified outdoor classroom called the Habitat Hub. It has room for two classes and acts as the starting point for the children’s outdoor adventures. This timber frame structure is made of disease dash trees re-harvested, milled down, with hand cut mortise and tenon joints to form an undulating tree like canopy under which the children learn.
Educational training in Physical Education in the context of current technological virtuality
Authors:   Instituto Superior de Formación Docente Salomé Ureña, Bennasar Miguel
Published: March 2022

The study's primary purpose focused on analyzing educational training in Physical Education and the use of technological tools in the current context as a way of perceiving the reality of the use of technological platforms in academic exchanges in a virtual way. The research is methodologically attached to descriptive field studies. The data collection instrument was the survey, made up of 12 items, with their alternatives, which allowed the informants to extract the information from which the analyzes were based. For validity, expert judgment was applied, and reliability was determined using the Cronbach Coefficient, whose result was 0.89. As conclusions, the students stated that ICTs represent a significant fact for understanding educational realities. Likewise, they showed disagreement about Physical Education being versatile under the virtual modality.
Differentiated effects of COVID-19 on university students
Authors:   Universidad Veracruzana, Mercado Ricardo , Otero Alma
Published: March 2022

The confinement due to the coronavirus had effects after implementing virtual education at all educational levels. To identify the students' perception about the teaching-learning conditions that prevailed during COVID-19, distinguishing those that allowed them to continue learning from those that did not work in the academic areas of higher education in health sciences. And economic-administrative, exploratory, descriptive and correlational research was carried out with students from the Universidad Veracruzana de México. The sample consisted of 665 non-probabilistic and non-random with a general population. It was inquired about the teacher's teaching activities, learning, academic interaction, digital knowledge, new understanding acquired, socio-emotional difficulties experienced and management strategies, and the technological resources and connectivity used. Among other results, it was found that students from the first semesters and women were the populations most likely to put metacognitive skills into practice.
Implementation of a virtual classroom in Moodle for learning mathematics within the framework of relational education
Authors:   Universidad de Investigación y Desarrollo, Gómez Ricardo
Published: March 2022

The departmental school Pio XII, located in Colombia, is one of the educational centers that implemented the relational education system. Thanks to this process, shortcomings were evidenced in the personalized attention offered by teachers. In this sense, the present research aims to establish the incidence of implementing a virtual classroom designed in Moodle for the learning of mathematics under the considerations of the relational system with the seventh-grade students of this institution. It was carried out with a quantitative approach, based on a correlational cross-sectional design, where seven previously designed instruments were applied. The information of the three scenarios was collected: before, during, and after the implementation of the virtual classroom, which led to making comparisons of 46 different processes. The results reveal that the virtual classroom makes the analyst's attention time more efficient since it allows the student to develop metacognitive skills that strengthen her autonomy process. In addition, as a consequence, it was shown that the virtual classroom generates a progressive increase in the students' academic results.
Autorregulación del aprendizaje y rasgos de personalidad en estudiantes universitarios
Authors: Cepeda Danna , Mahecha Jenny
Published: March 2022

The present investigation analyzes the relationship between the self-regulation of learning and the personality characteristics of university students belonging to the Minuto de Dios University Corporation - UNIMINUTO of Bogotá - Colombia the sample consisted of 75 men and women between 18 and 45 years of age. From the application of the instruments: Gordon's personality profile and inventory (ancestry, responsibility, emotional stability, sociability, caution, originality, commitment, vitality, and self-esteem) and the self-report questionnaire - self-regulation of learning, the correlational analysis was carried out. Using Spearman's Rho (significance level p<0.05). The results suggest that students who know and apply learning self-regulation techniques tend to be dominant (ancestry) independent, so they take responsibility for their personal goals (commitment), emotionally stable, and friendly. On the other hand, students who are cautious, original, and oriented towards understanding others tend to give little importance or use, to a lesser extent, the use of self-regulated learning strategies.