bluuebunny/crossref_metadata_2025 huggingface dataset:
Tendencia temporal de la mortalidad por desnutrición en Colombia, 2005-2019
Authors: Forero Ballesteros Luis Carlos , Forero Torres Ana Yibby
Published: March 2022

Objetivo. Describir la tendencia temporal general y desagregada por edad y sexo de la mortalidad por desnutrición en Colombia en el período 2005-2019.

Método. Estudio ecológico a partir de datos secundarios de mortalidad por desnutrición como causa básica de defunción según estadísticas vitales. Se calcularon las tasas de mortalidad anuales por 100 000 habitantes, crudas, específicas por edad y sexo y estandarizadas por edad. Se utilizó el método directo y se tomó como población de referencia la propuesta por la Organización Mundial de la Salud 2000-2025. Se efectuó una regresión lineal segmentada o de puntos de cambio.

Resultados. Se analizó un total de 26 200 registros de muerte por desnutrición para el período de estudio, que corresponde a 0,84% del total de defunciones en Colombia. La tasa de mortalidad en el grupo de 0 a 4 años fue de 9,9 por 100 000 habitantes; en los de 85 y más años, fue de 137 muertes por 100 000 habitantes. Todos los ajustes significativos en la tendencia del modelo fueron negativos, lo que indica una reducción en las tasas de mortalidad. El porcentaje de cambio anual fue significativo para el período 2007-2017, cuando la tasa de mortalidad disminuyó 2,8% en los hombres (intervalo de confianza del 95% [IC95%]: −4,3-−1,3) y 3,2% en las mujeres (IC95%: −5,0-−1,4).

Conclusiones. La mortalidad por desnutrición en Colombia es un evento de baja prevalencia en general, más elevada en los extremos del curso de vida, con una tendencia al descenso, principalmente en los grupos de edad más jóvenes y en las mujeres.
Preliminary screening and microbiological evaluation on the environmental
hygiene for galley equipment, safety equipment and cabin common facilities of a
local airline in Malaysia
Authors: Wing G.K. , Rollon D.W. , Kuan C.H. , Ajau D. , M.A.R. Nor-Khaizura , Hasan H. , Radu Son
Published: March 2022

Over the last two decades, only a handful of research have been conducted pertaining to
food safety in the aviation industry. The gap of knowledge in in-flight food safety
literature has long been silenced. Therefore, it was the objective of this study to conduct
preliminary screenings to evaluate the environmental quality of the service equipment
(GE), safety equipment (SE) and common facilities (CF) within the confinement of
commercial aeroplanes in Malaysia. A total of 112 swab samples (n = 112) were analyzed
to detect the prevalence of Escherichia coli, Vibrio, Salmonella and coliforms using
conventional microbiological methods. The qualitative aerobic mesophilic plate count
revealed that 99 (88.39%) and 13 (11.61%) were reported as positive and negative
samples, respectively. It was reported that all 17 samples taken from the long-haul flight
were positive, with 8 (9.14%), 4 (3.57%) and 5 (4.46%) samples belonging to the GE, SE,
and CF, respectively. Forty-five positive swab samples taken from medium-haul flight
sectors showed that 30 (26.79%), 8 (9.14%), 7 (6.25%) samples were that of the GE, SE,
and CF, respectively. Meanwhile, 19 (16.96%), 8 (9.14%), and 10 (8.93%) of the shorthaul flights samples were that of the GE, SE, and CF, respectively. It was therefore
concluded that GE, SE and CF were reported at 57 (50.89%), 20 (17.86%) and 22
(19.64%), respectively. In view of the large numbers and high percentages of positive
sample results, it is our opinion that the cleaning, sanitizing and disinfecting procedures of
the galley equipment, safety equipment and common facilities are revisited. The assurance
in conformance to the hazard analysis and critical control points (HACCP) management
system may enhance the safety and reliability of all stakeholders especially the flight
attendants who are the final custodians of the environmental hygiene and that of
themselves.
Pendampingan Penyusunan Standard Operational Procedure (SOP) dan Desain Kemasan bagi IKM Makanan di Kabupaten Kediri dan Kota Batu
Authors: Kodir Abdul , Islam Muh Ariffudin , Pradana Galih Wahyu , Kusumaningrum Trias Madanika , Rozaq Khoirur
Published: March 2022

Batu and Kediri City are areas in East Java with very high tourism potential. The creativity of business actors seizes this opportunity with the many emerging SMIs engaged in processed food/beverages which are commonly used by tourists for souvenirs. To create a good food company, it requires a good application of SOP and attractive product packaging and in accordance with the Indonesian National Standard. The purpose of this activity is to provide training in the preparation of Standard Operational Procedure (SOP) and design product packaging in the processed food/beverage business in Batu City and Kediri. The training and mentoring method is used to achieve the goal of increasing the competitiveness of the Food Small and Medium Industries (IKM) in Batu City and Kediri City. The training participants were 50 processed food and beverage businesses that had potential but had constraints on the preparation of SOPs and product packaging that had not been maximized. The results of this training showed a change in the behavior of participants, initially, only 10% of participants in Kediri and 6.7% in Batu had an SOP to 100%. Furthermore, participants who did not design their packaging properly in Kediri were 66.7% and in Batu 70% higher the results had increased to 100%. These results indicate that the participants experienced an increase in their ability to prepare SOPs and design packaging.
Motivating Students of SMK Muhammadiyah 1 Palu for Increasing English Language Vocabulary
Authors: Said Mawardin M , Rita Ferry , Waris Abdul , Jamiluddin H
Published: March 2022

Main issue of this commuity service is Motivating Students. Its objective was Increasing Vocabulary of English Language. Its specific target is SMK Muhammadiyah 1 Palu has students who have more vocabulary so that they can easily understand and express sentences of the EFL (English as a Foreign Language). They can be global students if they can increase vocabulary to express the internatonal language. Commuicative method was used to reach the objective. Formerly they were shy and unconfident in expressing the language vocabulary, but after being motivated to increase the global language vocabulary they then were confident to practice it by interacting with the community service team and have spirits better better than before to increase the vocabulary of English so that they can express the lingua franca words. The team motivated them to increase their English vocabulary practically and accompanied them to apply the practical ways of increasing the EFL vocabulary so that they have been able to express its words. They can be motivated to increase the vocabulary by telling them status and significances of English in Indonesia.Keywords: Motivating, Increasing, English, Language, Vocabulary
Pelatihan Pengajaran Fisika Berbasis Simulasi Menggunakan Perangkat Lunak PhET Bagi Guru IPA di Bangka sebagai Perangkat Laboratorium Virtual
Authors: Tiandho Yuant , Gusa Rika Favoria , Indriawati Anisa , Aldila Herman , Kurniawan Widodo B.
Published: March 2022

Meskipun ilmu fisika merupakan salah satu ilmu yang sangat penting dalam pengembangan teknologi saat ini namun di mata mayoritas peserta didik masih dianggap sebagai ilmu yang sulit dan tidak menarik. Hal ini kemungkinan disebabkan oleh masih banyaknya guru yang hanya menerapkan metode ceramah ketika proses belajar mengajar fisika. Alternatif untuk mengatasi permasalahan tersebut adalah diterapkannya praktikum agar peserta didik dapat memiliki pengalaman langsung terkait konsep fisika yang ada. Namun, beberapa sekolah di Bangka tidak memiliki fasilitas laboratorium yang memadai sehingga kegiatan praktikum tidak dapat berjalan dengan baik atau bahkan tidak dapat dilaksanakan. Pada program pengabdian kepada masyarakat ini, dilakukan pelatihan penggunaan perangkat lunak PhET sebagai solusi laboratorium virtual. Penggunaan laboratorium virtual selain efisien dari segi biaya juga mudah untuk dilakukan dan memungkinkan peserta didik melakukan praktikum virtual secara mandiri. Setelah dilakukan kegiatan pelatihan mayoritas peserta memberikan respon positif terhadap penggunaan PhET dalam proses belajar mengajar. Selain itu, perangkat lunak PhET mudah digunakan.
Pelatihan Pengelolaan Keuangan Keluarga Di Masa Pandemi pada Karyawan Tidak Tetap di Fakultas Ekonomi Unesa
Authors: Handayani Susi , Hariyati Hariyati , Wuryani Eni , Mariana Mariana , Putikadea Insyirah
Published: March 2022

The Covid-19 pandemic has impacted to almost all levels of society, including non-permanent staff named Tenaga Kependidikan Tidak Tetap (TKTT) and cleaning staff at Faculty of Economics Unesa. As an effort to help the economic conditions of non-permanent staffs family at Faculty of Economics Unesa, it is necessary to have community service activities that can reduce their burden and provide knowledge about financial management on family during this pandemic. The activities are about distributing daily needs stuffs and financial management training during the Covid-19 pandemic. Knowledge and understanding of financial management are very important as the key to solve financial problems during this pandemic. The aim of this activity is expected the non-permanent staff at Faculty of Economics can make their financial well plan and well manage to improve their welfare on future and happiness of their families. Financial management training has been held offline by adhering to World Health Organisation (WHO)s health protocols during the Covid-19 pandemic. The results of the activity show that the participants are excited because they get new knowledge on how to manage their financial and being able to distinguish between needs and wants on their lifestyle.
Penerapan Alat Cuci Tangan Otomatis untuk Masyarakat Kelurahan Bukit Merapin Kota Pangkalpinang
Authors: Gusa Rika Favoria , Naruari Dede , Yandi Welly
Published: March 2022

Since the beginning of 2020, the world has faced an outbreak of the Corona Virus Disease (COVID-19). Corona virus can be transmitted when someone touches nose, mouth or eyes after touching a surface that has been contaminated with the virus from a person who coughs or sneezes. To prevent contracting COVID-19, one way that can be done is to get used to washing hands with soap and running water, especially when in public places. With the automatic hand washing equipment, people do not need to touch the water tap to wash their hands, thus minimizing the possibility of spreading the virus. The hand washing device is made consisting of a water tap that can flow water automatically when an ultrasonic sensor captures hand movements around the mouth of the faucet and a water reservoir that can be filled automatically based on the reading of the water level by the ultrasonic sensor. This automatic hand washing tool has been used in sub-district office and mosque in Bukit Merapin sub-district, Pangkalpinang.
Pelatihan Pembuatan Modul Berbasis Kurikulum 2013 bagi Guru di Kabupaten Magetan
Authors: Puspasari Durinta , Puspasari Durinda , Nikmah Choirul , Rosy Brillian
Published: March 2022

The 2013 curriculum-based teaching materials making training is a means to improve the ability of teachers in making teaching materials that are relevant to the 2013 curriculum. So the teacher does not have a reference in learning. This training was given to vocational teachers in the Office Administration Skills Program in Magetan Regency. The purpose of the activity is 1) giving teachers knowledge about the 2013 curriculum and relevant teaching materials; 2) provide assignments for the preparation of modules based on 2013 Curriculum; 3) provide assistance to teachers to develop modules that are relevant to the 2013 Curriculum. The method of implementing PKM is by way of training and mentoring to teachers.The implementation of PKM consists of stages: 1) the delivery of material related to educational objectives based on the 2013 curriculum, the nature of learning, the understanding of teaching materials, and modules; 2) mentoring the making of curriculum-based learning modules in 2013. Keywords: training, modules, curriculum 2013
DEVELOPMENT OF SCIENCE TEACHING MATERIALS BASED GUIDED DISCOVERY FOR TRAINING SCIENCE PROCESS SKILLS
Authors: Imran Yuliana Anggraini , Agustini Rudiana , Taufikurohmah Titik
Published: March 2022

The purpose of this research is to produce science teaching materials based guided discovery for training science process skills. This study adapted to 4D (four D models) that consists define, design, develop, and disseminate, but the stage is done only to develop stage. Teaching materials include syllabus, RPP, worksheets, student books, and science process skill test. This research tested at SMPN 5 Pamekasan. Feasibility of teaching material from the aspect of validity, practicality and effectiveness. Descriptive data were analyzed quantitatively. The validity results showed that teaching material is very valid. Practicality of teaching material show with the value of implementation learning process is excellent category and is supported by the activity of science process skills that have been shown in the study. The effectiveness of the teaching materials obtained from the increase pretest to posttest results of students science process skills with high category N Gain score and as much as 98% of students responded positively to learning guided discovery model. Based on the results, we can conclude that teaching materials based guided discovery that has been developed has been qualified validity, practicality, and effectiveness so that it can be used to train science process skills.
PENGEMBANGAN MEDIA BERBASIS KOMPUTER LECTORA INSPIRE DALAM PEMBELAJARAN SUBTEMA LINGKUNGAN SOSIALKU UNTUK MENINGKATKAN HASIL BELAJAR SISWA KELAS III SEKOLAH DASAR
Authors: Irawan David Budi
Published: March 2022

ABSTRACTThis research has the objective of producing a viable, effective and efficient computer based Lectora Inspire media used to improve the learning outcomes of third grade students. This type of research is the development of 4D (Four D Model) from Thiagarajan. The results show that the Lectora Inspire media is oriented towards a scientific approach worthy of use and dissemination. Judging from the implementation of learning process using Lectora Inspire media can be concluded practically used to improve the outcome of 3rd Grade student learning result. The result of pretest and posttest used to test the effectiveness through T-Test is known that the value of sig. (2-tailed) 0.000 <0,05, because the sig value. (2-tailed) 0.000 smaller 0.05 it can be concluded that there are differences in learning outcomes before and after being treated using computer-based media and it can be concluded that Ho is rejected, thus there are differences in student learning outcomes before and after treatment is given. Thus, it can be concluded that the use of Lectora Inspire Media in the learning process to improve the learning outcomes of third grade students is feasible, practical and effective for use in Social Science learning materials of ethnic and cultural diversity of the nation in Indonesia for 3rd Grade Elementary School.Keywords: Feasibility, Lectora Inspire, Media, Practicality, Effectiveness. ABSTRAK                                                                                          Penelitian ini memiliki tujuan menghasilkan media berbasis komputer Lectora Inspire yang layak, efektif dan efisien digunakan untuk meningkatkan hasil belajar siswa Sekolah Dasar kelas III. Jenis penelitian ini adalah pengembangan 4D (Four D Model) Thiagarajan. Hasil penelitian menunjukkan media Lectora Inspire berorientasi pendekatan saintifik layak untuk digunakan serta disebarluaskan. Ditinjau dari ketelaksanaan Proses Pembelajaran menggunakan media Lectora Inspire dapat disimpulkan praktis digunakan untuk meningkatkan hasil belajar siswa kelas III SD. Hasil uji pretest dan posttest yang digunakan untuk menguji keefektifan melalui Uji-T yaitu diketahui bahwa nilai sig. (2-tailed) sebesar 0,000<0,05, karena nilai sig. (2-tailed) sebesar 0,000 lebih kecil 0,05 maka dapat disimpulkan bahwa ada perbedaan hasil belajar sebelum dan sesudah diberi perlakuan menggunakan media berbasis komputer maka dapat disimpulkan bahwa Hoditolak, dengan demikian terdapat perbedaan hasil belajar siswa sebelum dan sesudah diberikan perlakuan. Jadi, dapat disimpulkan bahwa penggunaan Media Lectora Inspire dalam proses pembelajaran untuk meningkatkan hasil belajar  siswa SD kelas III layak, praktis serta efektif digunakan dalam pembelajaran Ilmu Pengetahuan Sosial materi keberagaman suku dan budaya bangsa di Indonesia SD kelas III Sekolah Dasar.Kata Kunci: Kelayakan, Lectora Inspire, Media, Kepraktisan, Keefektifan.
PENGARUH PEMBELAJARAN DARING TERHADAP KEMAMPUAN LITERASI SAINS CALON GURU SEKOLAH DASAR: SEBUAH STUDI PENDAHULUAN
Authors: Naila Ishmatun , Khasna Fenny Tanalinal
Published: March 2022

ABSTRACTThe purpose of this study was to analyze the impact of online learning on the scientific literacy skills of pre-service elementary school teachers during the Covid-19 pandemic period. This study used descriptive qualitative method. The subjects of this study were 38 pre-service elementary school teachers in Elementary Biology Basic Concepts class. Data collection was carried out by using online questionnaires, observations, and interviews. The data is obtained by filling in the questions which are distributed to all respondents in the google form. The aspect of scientific literacy skills in this study uses four indicators including; identify, understand, demonstrate, and respond to scientific phenomena. The results of this study indicate that there is an effect of online learning on the literacy skills of pre-service elementary school teachers.Keywords: Coronavirus Disease, Elementary Biology Basic, Online Learning, Pre-Service Elementary Teacher, Scientific Literacy.ABSTRAKTujuan penelitian ini adalah untuk menganalisis dampak pembelajaran daring terhadap kemampuan literasi sains calon guru sekolah dasar selama pandemi Covid-19. Penelitian ini menggunakan metode deskriptif kualitatif. Subjek penelitian ini adalah 38 calon guru Sekolah Dasar khususnya pada  mata kuliah Konsep Dasar Biologi SD. Pengumpulan data dilakukan dengan kuesioner online, observasi, dan wawancara. Data diperoleh melalui pengisian pertanyaan yang dibagikan kepada semua responden dalam bentuk google formulir. Aspek kemampuan literasi sains pada penelitian ini menggunakan empat indikator diantaranya; mengidentifikasi, memahami, mendemonstrasikan, dan menanggapi fenomena sains. Hasil dari penelitian ini menunjukkan bahwa ada pengaruh pembelajaran daring terhadap kemampuan literasi calon guru Sekolah Dasar.  Kata Kunci: Coronavirus disease, Biologi SD, Pembelajaran Daring, Calon Guru, Literasi sains.
MENINGKATKAN KEMAMPUAN BERBAHASA INDONESIA SISWA SD LUVETA SURABAYA MELALUI LITERASI BERBASIS MEDIA DIGITAL
Authors: Rohmah Nur
Published: March 2022

The purpose of this study was to improve the Indonesian language skills of Luveta Elementary School Surabaya students through digital media-based literacy. This research is a qualitative research. The research subjects were students of SD Luveta Surabaya. Data collection techniques were carried out by means of observation, interviews, and documentation. Based on the results of the study, it was found that digital media-based literacy activities helped students in developing oral and written skills. At the habituation stage is the key to the success of literacy. The average student still has problems because the vocabulary is still lacking so that the ability to compose sentences is still not optimal. However, at the development stage students begin to be able to adapt and be able to understand well the contents of the reading and be able to express opinions with the right diction, the sentence structure still needs to be improved and also needs to practice loading conclusions. While in the third stage of learning, students are getting better because they are able to read with good pronunciation and intonation. Meanwhile, to make student resumes, there are no scores below the average, meaning that the clarity of content, spelling, completeness, wording, and neatness is getting better.
EVALUASI PELAKSANAAN PELATIHAN PELAYANAN TERPADU SATU PINTU SECARA DARING TAHUN 2021
Authors: Kholik Abdul , Sembiring Helena Ras Ulina
Published: March 2022

One Stop Service (e.g PTSP) is one of the government programs to provide fast, easy, cheap, transparent, sure and affordable services. One of the determinants of the success of PTSP in service is human resources in mastering the technical licensing process. To meet these needs, in 2021 the DKI Jakarta BPSDM will conduct online PTSP Training to anticipate the Covid-19 pandemic. In order to realize good training, it is necessary to evaluate to get input for the development of further training programs. The evaluation was carried out using the CIPP (Context – Input – Process – Product) evaluative model. The results show that in general the PTSP 2021 online training has not been carried out effectively, both in terms of context, input, process and product. The participants felt that this training was very useful, so it needed to be continued with improvements, and it was recommended to use blended learning.
An Instructional Design for The Improvement of Counting Skills in 3-Year-Old Children
Authors: Carbonell-Jornet Aida , Diago Pascual D. , Arnau David , García-Moreno Miguel A.
Published: March 2022

The aim of this pre-experimental study is to evaluate the acquisition level of counting skills of a 3-year-old classroom made up of 14 children through a specific instructional design. To this end, an instructional proposal to improve these mathematical skills was designed. Before and after the intervention, we measured the students’ level regarding counting skills through an evaluation of their counting abilities. The results indicate that the designed intervention increased the acquisition level of skills related to counting principles, constituting an effective instrument to enhance counting skills for 3-year-old children. In particular, after the intervention children improved significantly in skills related to the one-to-one correspondence principle and the order-irrelevance principle, both showing a large effect size in their observed differences. The cardinality principle, stable-order principle and abstraction principle also showed gains, but the differences were found to be statistically non-significant. Finally, the role of the age of the participants was also analyzed in relation to their acquired counting skills, indicating that children in the older age range improved their counting skills more than children in the younger group.
Using a Touch Point Instructional Package to Teach Subtraction Skills to German Elementary Students At-Risk for LD
Authors: Urton Karolina , Grünke Matthias , Boon Richard T.
Published: March 2022

This study replicates and extends prior research on multisensory mathematics instruction (Grünke, Urton, & Karnes, 2018) by integrating a touch points strategy, performance feedback, reward system, and a reinforcing card game into an instructional package. A multiple baseline design across participants was used to evaluate the effects of the touch points package on the subtraction skills of four German female first year students at-risk for learning disabilities. During intervention, the students were administered eight to eleven treatment sessions to learn how to subtract a one-digit subtrahend from a two-digit minuend up to 18 crossing over the tens barrier. Results indicated that all students made substantial increases in their subtraction performance during intervention. Student performance improved from 0 to 2 out of 10 math problems solved correctly during baseline to between 8 and 10 problems correct by the end of the intervention. Effect sizes observed across the four participants indicated the effectiveness of the intervention ranged from high to very high.
Examining Elementary School Teachers Perceptions of and Use of Formative Assessment in Mathematics
Authors: Martin Christie L. , Mraz Maryann , Polly Drew
Published: March 2022

Formative assessment and related processes continue to prove to be a high-leverage instructional practice that has potential to support all learners, especially those who demonstrate misconceptions with significant mathematics concepts. Teachers use formative assessment practices in varied ways and share different perspectives of the value of these assessments for student learning. This article will share survey results of 65 teachers across grade levels. Findings indicate teachers find formative assessment beneficial for identifying gaps in learning, offers opportunity to increase student learning, and supports their teaching practices. These results support prior research; however, there were notable findings that offer insight into improving the use of formative assessment. The survey showed that formative assessment was used primarily to identify gaps, but not used to identify strengths of the learner. Formative assessment prompts focus on the learner but does not include reflection of the efficacy of the tool that was used or instruction. Commercially created materials, a large expense for schools, was not identified as useful. Teachers identified barriers to using formative assessment. Implications for improving formative assessment practices are shared and continued research.
Can Music Support Calculation Skills A Pilot Study Using Electrophysiological Measures
Authors: Korkmaz Nurdan , Doğan Temur Özlem
Published: March 2022

The purpose of this study is to electrophysiologically assess the effect of an individualized education program supported with musical activities on the success of primary school students with computational difficulties. A mixed-methods design consisting of qualitative and quantitative methods was employed as the research model. The research group consists of four students with mild special learning difficulties and learning difficulties in mathematics, among the students attending the third and fourth grades at a primary school in Kütahya city center. By examining the primary school mathematics curriculum, 12 mental processing gains were identified for addition and subtraction, one of the third-grade mental processing gains. An assessment form, training module, and math songs were prepared in line with these acquisitions. An assessment form was applied to the participants as a pre-test and post-test to determine the effect of the training module and math songs on the students’ success.

Additionally, electroencephalogram (EEG) of the participants were recorded before and after the training module, and math songs were applied for 12 weeks. During the EEG recordings, 10 questions were asked to the participants that would enable them to make mental operations. The power densities of the EEG data were calculated using the Welch method in the MATLAB. To analyze the qualitative data of the research, descriptive analysis technique was used. As a result of the study, when the effects of the evaluation form of the participants’ mental processing skills were examined, it was seen that the training module and math songs positively affected the mental processing skills of the students. In addition, it has been shown that the prepared training module and math songs increase the success of the participants, supported by electrophysiological evaluations.
How a Measuring Perspective Influences Pre-service Teachers Reasoning about Fractions with Discrete and Continuous Models
Authors: Alqahtani Muteb M. , Powell Arthur B. , Webster Victoria , Tirnovan Daniela
Published: March 2022

How teachers interpret and express fractions critically influences their teaching and their students’ fraction knowledge. Internationally, the mathematics education community has been studying ways to enhance pre-service elementary teachers’ rational number knowledge, particularly fractions. To address the challenge of augmenting pre-service teachers’ fraction knowledge warrants theoretical and empirical revisions to standardized practices for teaching fractions. This study investigates how reexamining fractions from a distinctive measuring perspective influences pre-service teachers’ reasoning about fractions. For four 75-minute sessions, 46 pre-service teachers enrolled in a teacher preparation program at a university in the United States revisited fractions from a measuring perspective. They engaged in tasks that focused on comparing continuous quantities and identifying relative magnitudes. The data for this study comprise their pre- and post-tests that assessed how they identify and represent fractions with discrete and continuous models. For each model, we analyzed participants’ reasoning by attending to their written strategies. Findings revealed three main strategies: partition, construction, and symbolic manipulation. In general, participants expressed more strategies on the post-test for all fraction models. Partitioning was the most frequent strategy on the pre- and post-tests. However, the frequencies of strategies changed after the intervention. For example, with all models, there was an increase in partitioning strategy and a decrease in symbolic manipulation strategy. The results highlight affordances of a measuring perspective to support participants to shift from procedural strategies such as symbolic manipulation to more conceptual strategies to identify and represent fractions.
Indoor Radon Concentration and Risk Estimation: the EURA PROJECT
Authors: Barca D. , Bjosvik L. Liguori , Edman G. , Eliasson U. H. , Gervino G. , Philemark C. , Due Svendson B. E.
Published: March 2022

The indoor radon concentration level has been monitored in selected locations in four European countries (Iceland, Italy, Norway, and Sweden) during a yearlong measurement campaign using time-integrated passive radon dosimeters containing CR-39 track detectors. The measurements were carried out in private houses and public buildings like schools, for an exposure time of up to 6 months for each detector. Experimental data shows a great variation between different geographic areas, and often the average levels are over the acceptable radon limit of 300 Bq/m3recommended by the International Commission on Radiological Protection (ICRP). To investigate a relationship between indoor radon exposure and lung cancer, estimating the cumulative levels of exposure to indoor radon for an individual or population is necessary. We analyse the data sets and investigate the factors influencing indoor radon concentrations in order to determine the best use of the experimental information. The results show that the variables associated with indoor radon levels are strictly linked to the soil geology. Analyzing the data sets enables improved assessment of radon exposure in a given area. The average absorption effective dose equivalent for a person is computed, and the risk of lung cancer per year is evaluated. Doi: 10.28991/HEF-2021-02-04-01 Full Text: PDF
Modeling Gravity Segregation In Stratified And Dipping Reservoir Of Volatile Oil
Authors: Syahrial Ego
Published: March 2022

In this paper, we investigate gravity segregation in stratified and dipping reservoir of volatile oil under gas injection. A new efficient compositional simulation approach was used in this study to investigate the influence of gravity segregation and their magnitude in the case of gas injection into a volatile oil reservoir. The results show that in stratified and dipping reservoirs where the permeability decreases with depth, smaller the vertical to horizontal permeability ratio, lesser is the effect of gravity segregation, better is the sweep efficiency and hence better is the recovery. In the case of increasing permeability with depth in stratified dipping reservoirs, an up-dip gas injection into a volatile oil reservoir was found to be a favourable condition in term of recovery. Gravity forces have a considerable effect on volatile oil recovery via gas injection and the need for determining not only the fluid characteristics but also the reservoir heterogeneities was significant
Сравнение пылеудерживающей способности лиственных и хвойных пород города Ташкент, Узбекистан
Authors:   Кафедра Ботаники и физиологии растений, Биологический факультет, Национальный университет Узбекистана имени Мирзо Улугбека, ул. Университетская, 4, Ташкент, 100174, Узбекистан, Зейберт Е. , Акиншина Н. ,   Отдел Прикладной экологии и устойчивого развития, Национальный университет Узбекистана имени Мирзо Улугбека, ул. Университетская, 4, Ташкент, 100174, Узбекистан, Митусов А. ,   Казахстанско-Немецкий университет, ул. Пушкина, 111, Алматы, 050010, Казахстан
Published: March 2022

Целью исследования является изучение пылеудерживающей способности кроны деревьев и определение возможности использования этого параметра для оценки запыленности воздуха разных зон города. Показатель пылеудерживающей способности выражен в массе пыли, которую может удержать единица площади зеленой массы деревьев. Растительный материал был отобран на трех участках города Ташкент с разными экологическими условиями (освещение, температура, источники пыли) по следующим видам: катальпа красивая – Catalpa bignonioides Walt., платан кленолистный – Platanus acerifolia, сосна эльдарская – Pinus eldarica и можжевельник виргинский – Juniperus virginiana. По итогам исследования наибольшие значения пылеудержания при сравнении с хвойными отмечены у лиственных пород: у платана – 2,4 мг/см2, 1,2 мг/ см2, 13,3 мг/см2 и катальпы – 8 мг/см2, 3,6 мг/см2; у сосны – 0,185 мг/ см2, 0,062 мг/см2, 0,785 мг/см2 и можжевельника – 2,2 мг/см2, 0,4 мг/см2. В результате определена способность удержания пыли из расчета общего выброса пыли в г. Ташкент, который составил в среднем 24,6 ± 6,9 тыс. тонн в период с 2009 по 2018 г. Платан способен удержать на себе около 0,61 %, сосна – 0,16 % от среднегодовой (2009–2018 гг.) массы аэрозолей (на 100 тыс. деревьев). Выполненные расчеты позволяют заключить, что для компенсации (удержания) годового выброса пыли в Ташкенте необходимо примерно 17–19 млн деревьев платана или 60–62 млн сосен
Return on Equity (ROE), Price Earning Ratio (PER), Volume Perdagangan dan Harga Saham Masa Lalu terhadap Harga Saham
Authors: Anjani Erinaratna , Handri
Published: March 2022

Abstract. The study aims to determine the effect of Return on Equity, Price Earning Ratio, trading volume and past stock price on stock price. The author uses 6 samples listed on IDX30 on the Indonesia stock exchange with a time span of quarter I/2018 – quarter IV/2021. The research method used is explanory research with data analysis using panel data regression. The results showed that the variabels of ROE, PER, Trading Volume and Past Stock Price had a sufficient relationship. Simultaneous hypothesis test results show that the variabel ROE, PER, Trading Volume and Past Stock Price have a significant effect on stock prices. While the partial test results show that Price Earning Ratio, Trading Volume and Past Stock Prices have an effect on stock prices, while Return on Equity has no effect on stock price.

Abstrak. Penelitian ini bertujuan untuk mengetahui pengaruh Return on Equity (ROE), Price Earning Ratio (PER), Volume Perdagangan dan Harga Saham Masa Lalu terhadap Harga Saham. Penulis menggunakan 6 sampel yang terdaftar di IDX30 di Bursa Efek Indonesia dengan rentang waktu selama Kuartal I/2018 – Kuartal IV/2021. Metode yang digunakan yaitu explanatory research dengan analisis data menggunakan regresi data panel. Hasil penelitian menunjukan bahwa variabel ROE, PER, Volume Perdagangan dan Harga Saham Masa Lalu memiliki hubungan yang cukup. Hasil uji hipotesis secara simultan menunjukan bahwa variabel ROE, PER, Volume Perdagangan dan Harga Saham Masa Lalu berpengaruh secara signifikan terhadap harga saham. Sedangkan hasil pengujian secara parsial diperoleh hasil bahwa Price Earning Ratio, Volume Perdagangan dan Harga Saham Masa Lalu berpengaruh terhadap harga saham, sedangkan Return on Equity tidak berpengaruh terhadap harga saham.
Pengaruh Pembiayaan Bagi Hasil Mudharabah dan Musyarakah terhadap Return On Asset pada Bank Umum Syariah yang Terdaftar di Otoritas Jasa Keuangan Periode 2015-2019
Authors: Elsa Prastika  , Azib
Published: March 2022

Abstract. This study aims to determine the effect of Mudharabah Financing and Musyarakah Financing on Return On Assets (ROA) in Islamic Commercial Banks recorded at the Financial Services Authority (OJK) in 2015-2019. The data collection method in the research subject was obtained by tabulating secondary data in the form of financial reports at Islamic Commercial Banks registered with the Financial Services Authority in 2015-2019. Quantitative data analysis method is carried out by processing SPSS software in the form of classical assumptions testing, testing F test and t test to draw conclusions. The results of this study indicate that Mudharabah Financing and Musyarakah Financing have a positive and significant effect of 65.3% on Return On Assets (ROA) in Islamic Commercial Banks registered with the Financial Services Authority (OJK) in 2015-2019 either partially or simultaneously.

Abstrak. Penelitian ini bertujuan untuk mengetahui pengaruh Pembiayaan Mudharabah dan Pembiayaan Musyarakah terhadap Return On Asset (ROA) di Bank Umum Syariah yang terdatar di Otoritas Jasa Keuangan (OJK) pada tahun 2015-2019. Metode pengumpulan data dalam subjek penelitian diperoleh dengan menabulasi data sekunder dalam bentuk laporan keuangan di Bank Umum Syariah yang terdaftar di Otoritas Jasa Keuangan pada tahun 2015-2019. Metode analisis data kuantitatif dilakukan dengan mengolah data perangkat lunak SPSS dalam bentuk asumsi klasik menguji, menguji statistik uji F dan menguji uji t untuk menarik kesimpulan yang menarik. Hasil penelitian ini menunjukkan Pembiayaan Mudharabah dan Pembiayaan Musyarakah memiliki pegaruh positif dan signifikan sebesar 65,3% terhadap Return On Asset (ROA) di Bank Umum Syariah yang terdaftar di Otoritas Jasa Keuangan (OJK) pada tahun 2015-2019 baik secara parsial maupun simultan.
Tinjauan Hukum Islam Terhadap Penggunaan Sedotan Plastik di Coffee Shop
Authors: Imadi Haliya Azka , Agus Putra Panji Adam , Yusup Akhmad
Published: March 2022

Abstract. All forms of muamalah activities are permissible until evidence shows the prohibition on bringing benefit to humankind and/or rejecting anything destructive. However, in practice, there are still many who ignore the benefits of doing business. Such as buying and selling drinks using plastic straws at the Kopi X coffee shop, where sellers ignore the impact of using plastic straws on drinks. Therefore, this study aims to determine the review of Islamic law regarding plastic straws at the X Coffee Shop, Bandung. Field studies with a sociological juridical approach were used to collect data for this research. In addition, observations, interviews, documentation, and literature studies were also conducted to strengthen the research data. Meanwhile, this research uses data reduction, data presentation, and conclusion to analyze research data. This study concludes that the use of plastic straws in drinks at the X Coffee Shop is dangerous because it contains chemicals that are not good for the body. Therefore, this is against Islamic law because the harm from using plastic straws outweighs the benefits.

Abstrak.  Segala bentuk kegiatan bermuamalah bersifat boleh sampai ada bukti yang menunjukkan larangannya dengan alasan membawa kemaslahatan bagi umat manusia dan atau menolak segala sesuatu yang merusak. Namun praktiknya, masih banyak yang mengabaikan kemaslahatan dalam berbisnis. Seperti halnya kasus jual beli minuman menggunakan sedotan plastik di kedai kopi Kopi X Bandung, dimana penjual mengabaikan dampak penggunaan sedotan plastik pada minuman. Oleh karena itu, penelitian ini bertujuan untuk mengetahui tinjauan syariat Islam tentang penggunaan sedotan plastik di Kedai Kopi X Coffee Bandung. Studi lapangan dengan pendekatan yuridis  sosiologis digunakan untuk mengumpulkan data penelitian ini. Selain itu, observasi, wawancara, dokumentasi, dan studi kepustakaan juga dilakukan untuk memperkuat data penelitian. Sedangkan reduksi data, penyajian data, dan penarikan kesimpulan digunakan untuk menganalisa data penelitian. Penelitian ini menarik simpulan bahwa penggunaan sedotan plastik pada minuman di Coffee Shop Kopi X merupakan hal yang berbahaya karena mengandung zat kimia yang tidak baik bagi tubuh. Oleh karena itu, hal ini bertentangan dengan hukum Islam, karena bahaya dari penggunaan sedotan plastik lebih besar daripada manfaatnya.
Tinjauan Etika Bisnis Islam pada Tabungan Paket Lebaran Sembako
Authors: Fauziah Alfira Eka , Suprihatin Titin , Eprianti Nanik
Published: March 2022

Abstract. Islamic business ethics are rules, rules, norms based on the Al-Quran and Hadith which are used as references or guidelines by business people in carrying out their business activities. In this study, the business practice of saving basic necessities in Sindangkasih Village is not in accordance with the principles of Islamic business ethics, where the information and transparency provided by business actors are not evenly distributed. This study aims to find out the practice and review of Islamic business ethics by business actors in the Eid food package savings in Sindangkasih Village. The research method used is a qualitative method with a descriptive qualitative approach with the type of field data or field research and data collection through observation, interviews, questionnaires, documentation and literature studies. The results of this study indicate that business actors saving basic necessities in the Sindangkasih Village have not been maximal in applying Islamic business ethics, namely the principles of honesty and the principle of balance/fairness. So the practice of saving basic necessities in the Sindangkasih Village has not been fully or optimally implemented in implementing Islamic business ethics.

Abstrak. Etika bisnis Islam merupakan aturan, kaidah, norma-norma yang berlandaskan Al-Quran dan Hadist yang dijadikan sebagai acuan atau pedoman oleh pelaku bisnis dalam menjalankan aktivitas bisnisnya. Pada penelitian ini praktik usaha tabungan paket lebaran sembako di Kelurahan Sindangkasih tidak sesuai dengan prinsip etika bisnis Islam, dimana tidak meratanya informasi serta transparansi yang diberikan oleh pelaku usaha. Penelitian ini bertujuan untuk mengetahui praktik serta tinjauan etika bisnis Islam oleh pelaku usaha pada tabungan paket lebaran sembako di Kelurahan Sindangkasih. Metode penelitian yang digunakan adalah metode kualitatif dengan pendekatan kualitatif yang bersifat deskriptif dengan jenis data lapangan atau field research dan pengambilan data melalui observasi, wawancara, kuesioner serta studi literatur. Hasil penelitian ini menunjukan bahwa pelaku usaha tabungan paket lebaran sembako di Kelurahan Sindangkasih belum maksimal dalam menerapkan etika bisnis Islam yaitu pada prinsip kejujuran dan prinsip keseimbangan/keadilan. Maka praktik tabungan paket lebaran sembako di Kelurahan Sindangkasih belum sepenuhnya atau secara maksimal dalam menerapkan etika bisnis Islam.
Analisis Fikih Muamalah terhadap Praktik Pemberian Imbalan Penjualan Sapi Kurban yang Melibatkan Pihak Ketiga
Authors: Nuraeni Elma , Febriadi Sandy Rizki , Hamdani Fahmi Fatwa Rosyadi Satria
Published: March 2022

Abstract. Ju’alah contract is a commission given to someone because of something he did. Ju’alah literally means something that is charged to someone else to do or an order that is intended for someone to then run or do. This study aims to find answer to the main problems, namely how the theory of Ju’alah contracts in fiqh muamalah, how the practice of giving rewards for selling sacrificial cattle involving third parties in Kubangsari Village, Tasikmalaya City, how theanalysis of muamalah fiqh on the practice of giving rewards for selling sacrificial cattle in Kubangsari Village, Tasikmalata City. In this study the authors used qualitative research methods with data collection techniques by means of interviews, observation, and documentation. The mechanism for the practice of giving rewards for the sale of sacrificial cattle to third parties in Kubangsari Village, Tasikmalaya City itself is by means of a broker to find a buyer for the owner of the livestock, after the livestock is sold, the broker will get wages from the procceds from the sale of the livestock. The result of this study are the sale of sacrificial cows in Kubangsari Village is included in the Ju’alah contract, namely the giving of rewards is carried out at the end when the work has been completed.

Abstrak. Akad ju’alah adalah komisi yang diberikan kepada seseorang karena sesuatu yang ia lakukan. Secara harfiah ju’alah bermakna sesuatu yang dibebankan kepada orang lain untuk dikerjakan atau perintah yang ditujukan untuk seseorang untuk kemudian dijalankan atau dikerjakan. Penelitian ini bertujuan untuk mencari jawaban dari pokok permasalahan, yaitu bagaimana teori akad ju’alah dalam fikih muamalah, bagaimana praktek pemberian imbalan penjualan sapi kurban yang melibatkan pihak ketiga di Desa Kubangsari Kota Tasikmalaya, bagaimana analisis fikih muamalah terhadap praktek pemberian imbalan penjualan sapi kurban di Desa Kubangsari Kota Tasikmalaya. Dalam penelitian ini penulis menggunakan metode penelitian kualitatif dengan teknik pengumpulan data dengan cara wawancara, observasi, serta dokumentasi. Mekanisme praktek pemberian imbalan penjualan sapi kurban terhadap pihak ketiga di Desa Kubangsari Kota Tasikmalaya itu sendiri yaitu dengan cara seorang makelar mencarikan pembeli untuk pemilik hewan ternak, setelah hewan ternak tersebut laku terjual maka makelar akan mendapatkan upah dari hasil penjualan hewan ternak tersebut.  Hasil dari penelitian ini yaitu Transaksi penjualan sapi kurban di Desa Kubangsari ini termasuk ke dalam akad ju’alah, yaitu dalam pemberian imbalannya dilakukan di akhir saat pekerjaan tersebut sudah selesai dilakukan.