bluuebunny/crossref_metadata_2025 huggingface dataset:
Block-hash of blockchain framework against man-in-the-middle attacks
Authors: Riadi Imam , Umar Rusydi , Busthomi Iqbal , Muhammad Arif Wirawan
Published: May 2021

Payload authentication is vulnerable to Man-in-the-middle (MITM) attack. Blockchain technology offers methods such as peer to peer, block hash, and proof-of-work to secure the payload of authentication process. The implementation uses block hash and proof-of-work methods on blockchain technology and testing is using White-box-testing and security tests distributed to system security practitioners who are competent in MITM attacks. The analyisis results before implementing Blockchain technology show that the authentication payload is still in plain text, so the data confidentiality has not minimize passive voice. After implementing Blockchain technology to the system, white-box testing using the Wireshark gives the result that the authentication payload sent has been well encrypted and safe enough. The percentage of security test results gets 95% which shows that securing the system from MITM attacks is relatively high. Although it has succeeded in securing the system from MITM attacks, it still has a vulnerability from other cyber attacks, so implementation of the Blockchain needs security improvisation.
Peningkatan kemampuan komunikasi matematis tertulis melalui pendekatan Saintifik pada materi trigonometri bagi Siswa Kelas X MAN 1 Flores Timur
Authors: Prentha Abbas
Published: May 2021

AbstrakPenelitian ini bertujuan untuk meningkatkan kemampuan komunikasi matematis tertulis siswa melalui pendekatan saintifik. Pelaksanaan tindakan kelas dilaksanakan dalam dua siklus. Subyek penelitian ini adalah siswa kelas X MIA1 MAN Flores Timur berjumlah 32 siswa terdiri dari 13 laki-laki dan 19  perempuan. Pengumpulan data saat penelitian dilakukan dengan cara observasi, catatan lapangan, dan dokumentasi. Teknik analisis data yang digunakan peneliti adalah reduksi data, penyajian data, dan penarikan kesimpulan. Hasil penelitian menunjukkan adanya peningkatan komunikasi matematika melalui pendekatan saintifik dengan indikator 1) Menyatakan ide matematis melalui tulisan, gambar, grafik atau tabel sebelum 18,75% sesudah 87,5%, 2) Memahami, menafsirkan dan mengevaluasi ide-ide matematis yang disajikan secara tertulis sebelum 28,125% sesudah 84,375%, 3) Menghubungkan berbagai ide matematis yang disajikan secara tertulis menggunakan istilah-istilah atau symbol matematika secara tepat untuk menyelesaikan permasalahan matematika dengan langkah-langkah yang terstruktur sebelum 6,25% dan sesudah 75%. Dari tiap indikator terdapat peningkatan komunikasi matematika siswa dengan pendekatan saintifik bagi siswa kelas  X MIA1 MAN Flores Timur.Kata kunci: komunikasi matematis, komunikasi matematis tertulis; pendekatan saintifik;  perbandingan trigonometri  AbstractThe study aims to improve students’ written mathematical communication skills through a scientific approach. Classroom action was carried out in two cycles. The subjects of this study were students of class X MIA1 MAN Flores Timur, totaling 32 students consisting of 13 men and 19 women. Data collection methods when research using observations, field notes, and documentation. Data analysis techniques used by researchers are data reduction, data presentation, and concluding. The result showed an increase in mathematical communication through a scientific approach with indicators 1) Express mathematical ideas through writing, pictures, graphics or tables before 18.75% after 87.5%, 2) understanding, interpreting and evaluation mathematical ideas presented in the text previously 28.125%  and after 84.375%, 3) connection mathematical ideas presented in writing using mathematical terms or symbols appropriately to solve the mathematical problem with structured steps before 6.25% after 75%. From each indicator, there is an increase in students’ mathematical communication with a scientific approach for students of class X MIA1 MAN Flores Timur.Keywords: mathematical communication; written mathematical communication; scientific approach; trigonometric comparison
Simulasi Entropi Shannon, Entropi Renyi, dan informasi pada kasus Spin Wheel
Authors: Khumaidi Ali
Published: May 2021

Entropi adalah besaran yang mengukur ketidakpastian variabel acak, dan ini adalah besaran yang merupakan kunci dalam konsep teori informasi. Entropi adalah ukuran ketidakpastian. Konsep entropi dimulai dengan terminologi yang disebut konten informasi. Shannon Entropy sering dinyatakan sebagai asal mula ukuran informasi yang digunakan dalam beberapa aplikasi. Pada penelitian ini menggunakan balanced dan unbalanced spin whell dengan nilai q = 1,000001 diperoleh entropi Shannon, Renyi dan informasi pada balanced spin wheels masing-masing 2.079442, 2.079442, 2.079439 dan pada unbalanced spin wheels masing-masing juga 1.936798, 1.936798, 1.936796 jadi nilainya dari entropi dan informasi akan cenderung shanon entropi ketika        q → 1.
Efektifitas media Aplimath pada mata kuliah kalkulus I sebagai peningkatan motivasi belajar mahasiswa
Authors: Ngastiti Pukky Tetralian Bantining , Alfan Aris , Umam Ahmad Khairul
Published: May 2021

Pada dasawarsa terakhir perkembangan teknologi begitu pesat, salah satunya di bidang smartphone. Teknologi smartphone begitu canggih salah satunya yaitu penggunaan operasi sistem android yang terus berkembang dan terbarukan. Bidang kalkulus adalah cabang ilmu matematika yang mencakup limit, differensial, deret tak terhingga, dan integral. Tujuan dari penulisan ini yaitu menguji efektivitas dari media aplimath berbasis android pada mata kuliah kalkulus I. Aplimath merupakan salah satu alternatif media pembelajaran berbasis teknologi android. Metode dalam penelitian ini menggunakan desain borg and gall dengan 6 langkah yaitu potensi dan masalah, pengumpulan data, desain produk, validasi desain, revisi desain, ujicoba produk. Hasil dari penelitian yaitu rata-rata hasil angket yang diberikan mahasiswa dari berbagai aspek penilaian yaitu sebesar 85%. Sedangkan berdasarkan hasil belajar yaitu terdapat perbedaan hasil belajar antara nilai uts dengan nilai media yaitu sebesar 13,33 dan dengan menggunakan uji-t didapat thitung 2,588 > ttabel 2,365. Dari hasil tersebut dapat disimpulkan bahwa media aplimath berbasis android pada matakulah kalkulus I efektif digunakan sebagai alternatif sumber belajar berbasis teknologi bagi mahasiswa prodi matematika di Universitas Billfath.Kata Kunci: Aplimath, Efektifitas, Kalkulus I
Proses berpikir fungsional siswa SMP dalam menyelesaikan soal matematika
Authors: Suryowati Eny
Published: May 2021

Berpikir fungsional pada penelitian ini merupakan generalisasi dari suatu hubungan antara beberapa variabel. Proses berpikir fungsional pada penelitian ini menggunakan tahapan berpikir dalam menyelesaikan soal atau masalah matematika yang terdiri dari tahap entry, attack dan review. Penelitian ini merupakan penelitian kualitatif. Metode pengumpulan data pada penelitian ini melalui pemberian soal matematika dan wawancara. Soal matematika tersebut dikerjakan secara think aloud. Instrumen penelitian yang digunakan yaitu soal matematika tentang pola dan pedoman wawancara. Sebanyak 20 siswa SMP kelas VII diberi soal matematika dan dua siswa dipilih untuk dianalisis proses berpikir fungsionalnya. Proses berpikir subjek pertama dan kedua memperoleh informasi yang terdapat pada soal, ini merupakan tahap entry. Pada tahap attack, subjek pertama membuat strategi dengan membuat tabel tentang banyak meja dan banyak orang yang bisa menempatinya lalu menemukan keteraturan pola. Subjek kedua mencari kesamaan cara untuk menghitung banyaknya orang yang bisa menempati meja pada setiap model (meja dan banyak orang yang menempati) yang terdapat pada soal. Pada tahap review, subjek pertama memperluas keteraturan pola dan subjek 2 memperluas kesamaan cara untuk menghitung banyak orang yang menempati meja. Proses berpikir subjek pertama secara parsial, mengamati keteraturan pola pada setiap bagian. Sedangkan proses berpikir subjek kedua secara induktif, cara yang berlaku disetiap model diperluas sesuai yang ditanyakan pada soal.
Peningkatan hasil belajar matematika pada Siswa Kelas IV SD Negeri Karangwuni 03 melalui pembelajaran kooperatif tipe STAD
Authors: MULYANI SRI
Published: May 2021

Penelitian ini bertujuan untuk menerapkan model pembelajaran kooperatif tipe STAD dalam upaya meningkatkan hasil belajar matematika kelas IV SD Negeri Karangwuni 03 yang berada dibawah KKM. Metode ini juga guna untuk membeikan inovasi metode pembelajaran dalam mata pelajaran ini agar siswa dapat berperan aktif dalam proses KBM. Penelitian ini merupakan penelitian Tindakan kelas dengan menggunakan tiga siklus. Berdasarkan hasil penelitian dan analisa data dapat disimpulkan melalui metode pembelajaran koopertaif tipe STAD dapat meningkatkan hasil belajar siswa pada aspek kognitif, afektif dan psikomotor pada setiap siklusnya. Pada siklus 1 menunjukkan pencapaian belum maksimal, Prosentase keberhasilan (ketuntasan) siswa dari nilai kognitif 60 %, nilai afektif 70 %, dan psikomotor 70 %. Pada siklus II Prosentasi peningkatan ketuntasan siswa pada nilai kognitif, Afektif, dan psikomotor sebesar 70% dengan nilai rata-rata 81.3 pada ketiga aspek. Kemudian untuk siklus ke III menunjukkan hasil yang cukup signifikan dengan rata-rata nilai 87.0 dan tingkat ketuntasan adalah 90-100 %.
Analisis kemampuan pemecahan masalah matematis siswa pada materi segiempat dan segitiga
Authors: Amaliah Fitri , Sutirna Sutirna , Zulkarnaen Rafiq
Published: May 2021

Penelitian ini bertujuan untuk menganalisis kemampuan pemecahan masalah matematis siswa  materi segiempat dan segitiga berdasarkan tahapan Polya. Subjek dalam penelitian ini adalah siswa kelas VIII J SMPN 1 Kotabaru Tahun Ajaran 2019/2020, yang dikelompokan menjadi 3 kategori yakni tinggi dengan Skor ≥ Mean + 1 SD, kategori sedang M – 1 SD ≤ Skor < M + 1 SD, dan kategori rendah dengan Skor < M – 1 SD. instrumen yang digunakan dalam penelitian ini adalah tes dan wawancara. Hasil penelitian menunjukkan bahwa siswa kategori kemampuan tinggi sudah mampu memecahkan masalah yang diberikan, tetapi kurang teliti dalam menuliskan kesimpulan dari solusi yang diinginkan serta kurang teliti dalam menuliskan satuan. Siswa kategori kemampuan sedang belum mampu memecahkan masalah yang diberikan karena hanya mampu memahami masalah dan merencanakan penyelesaian, siswa mengalami kesulitan dalam melakukan proses perhitungan/komputasi serta kurang teliti saat mengerjakan. Siswa kategori kemampuan rendah belum mampu memecahkan masalah yang diberikan karena siswa mengalami kesulitan dalam memahami masalah, sehingga tidak mampu melakukan tahapan selanjutnya.
Pengaruh model pembelajaran problem based learning terhadap kemampuan pemecahan masalah matematika Siswa Kelas XI SMA Negeri 15 surabaya
Authors: Putri Rani Kurnia , Roichan Dinda Inggit Prasesti
Published: May 2021

Penelitian ini dilatar belakangi oleh rendahnya siswa dalam kemampuan pemecahan masalah matematika. Agar kemampuan pemecahan masalah matematika siswa tidak rendah maka dibutuhkan model pembelajaran. Model pembelajaran yang dimaksud adalah model pembelajaran Problem Based Learning. Adapun rumusan  masalah dalam penelitian ini yaitu “Apakah terdapat pengaruh model pembelajaran Problem Based Learning terhadap kemampuan pemecahan masalah matematika siswa kelas XI SMA Negeri 15 Surabaya”. Tujuannya adalah untuk mengetahui ada tidaknya pengaruh model Problem Based Learning terhadap kemampuan pemecahan masalah matematika siswa kelas XI SMA Negeri 15 Surabaya. Populasi dalam penelitian ini adalah seluruh siswa di kelas XI SMA Negeri 15 Surabaya tahun pelajaran 2019/2020. Sampel yang digunakan dalam penelitian ini yaitu kelas XI-IPA 3 sebagai kelompok eksperimen dan kelas XI-IPA 2 sebagai kelompok kontrol. Hasil penelitian secara keseluruhan menunjukkan bahwa berdasarkan analisis data nilai thitung adalah 2,15. Dengan menggunakan taraf signifikan α = 5% dan dengan derajat kebebasan (dk) = 63, ttabel = 1,9983, karena thitung > ttabel, maka H0 ditolak dan H1 diterima. Sehingga dapat ditarik kesimpulan bahwa ada pengaruh model pembelajaran Problem Based Learning terhadap kemampuan pemecahan masalah matematika siswa kelas XI SMAN 15 Surabaya.
Community of Practice Among Faculty Team-Teaching Education Doctorate (Ed.D.) Students: A Reflective Study
Authors: M Clark Christopher , Olson Kate , Hacifazlioglu Ozge , L Carlson David
Published: May 2021

Aim/Purpose: The purpose of the study was to contribute to knowledge about the ways in which incorporating a Community of Practice into doctoral seminar teaching and course management could be a practical and sustainable path to professional development for doctoral faculty aspiring to become stewards of the practice of teaching.

Background: This report documents a reflective self-study conducted by four professors engaged in a community of practice while team-teaching a linked pair of EdD seminars on action research at Arizona State University.

Methodology: This reflective study used field notes and written reflections as its sources of data to examine how participants’ identities as professors of education changed during and after participating in a team-taught professional doctoral pair of courses.

Contribution: An important goal of the community of practice was to promote faculty professional development as stewards of the practice of teaching. Engaging in disciplined reflection on teaching is uncommon in American graduate education and rarely documented in the literature of post-compulsory education.

Findings: Analysis of post-hoc reflective accounts and contemporaneous notes revealed a general pattern of gradual transformation by the teaching team members. The professors moved from anxious concern about appearing competent to growing confidence and appreciation for the potential of a community of practice to provide significant professional benefits to students and faculty. Salutary features of reflective team teaching in a community of practice persist in participants’ subsequent teaching practice.

Recommendations for Practitioners: Reported benefits include eagerness for team teaching, increased openness to pedagogical suggestions from peers, comfort with being observed by colleagues while teaching, and willingness to revise plans when initial plans and practices are not working effectively for students.

Recommendation for Researchers: Data analysis and testimony support the claim that engaging in a CoP, in this case, did support their identity transformation as stewards of their own practice as instructors and professors of education. However, the study design does not support a claim that most or all future Communities of Practice in doctoral education will produce similar salutary results. Testing this proposition will require additional research in settings and programs different from the one represented here.

Impact on Society: Implementing communities of practice in doctoral programs can make room for professional development for both the faculty team and for the students.

Future Research: Further studies could be conducted to document the ways in which other communities of practice can be used to develop faculty instructors in masters and doctoral programs and in undergraduate education.
Application of HyMethShip Propulsion using On-board Pre-combustion Carbon Capture for Waterborne Transport
Authors: Wermuth Nicole , Zelenka Jan , Moeyart Paul , Aul Abhijit , Borgh Martin
Published: May 2021

The HyMethShip project (Hydrogen-Methanol Ship propulsion using on-board pre-combustion carbon capture) is a cooperative R&D project funded by the European Union’s Horizon 2020 research and innovation program. The project aims to drastically reduce emissions while improving the efficiency of waterborne transport. The HyMethShip system will achieve a reduction in CO2 of up to 97% and practically eliminate SOx and particulate matter emissions. NOx emissions will fall by over 80 %, safely below the IMO Tier III limit. In this study the HyMethShip concept is introduced and various aspects of the concept development are discussed. Additionally, some issues that might accelerate or hinder the concept application for commercial shipping are presented. Doi: 10.28991/HIJ-2021-02-02-01 Full Text: PDF
Thermodynamic Analysis of a Combined Single Effect Vapour Absorption System and tc-CO2 Compression Refrigeration System
Authors: Verma Abhishek , Kaushik S. C. , Tyagi S. K.
Published: May 2021

Transcritical CO2 refrigeration system is coupled with the single effect vapour absorption with LiBr-water as a working pair having an objective to enhance the performance of low temperature transcritical refrigeration system while using natural working pair and to reduce the electricity consumption to produce low temperature refrigeration. The high grade waste heat rejected in the gas cooler of tc-CO2 compression refrigeration system (TCRS) is utilized to run the single effect vapour absorption system (SEVAR) to enhance the energy efficiency of the system. The gas cooler in the transcritical CO2 system is having heat energy at high temperature and pressure, which is utilized to run the vapour absorption system, while the other refrigerant heat exchanger provides subcooling to further enhance the performance. The combined cycle can provide refrigeration temperature at different levels, to use it for different applications. Energetic and exergetic analysis have been done to analyze the combined system to compute the performance parameters and the irreversibilities occurring in different components to further increase the performance. The combined system is optimized for various heat rejection and refrigeration temperatures. The COP of the combined system has been enhanced by to 24.88% while the enhancement in exergetic efficiency (ηex) is observed as 10.14% respectively over tradition transcritical CO2 compression refrigeration system, with -10°C as an evaporation (TCRS cooling) temperature and exit temperature of gas cooler T4 being 40°C. Doi: 10.28991/HIJ-2021-02-02-02 Full Text: PDF
Evaluation of an Anthropometric Fast Bowling Machine
Authors: Bickramdass Ronnie , Persad Prakash , Loutan Jr. Kelvin
Published: May 2021

The use of bowling machines to train batsmen whether it be indoors or outdoors has increased significantly. In the absence of bowlers, batsmen can bat for hours without any bowlers getting tired. The designs of these machines are often a derivative of ball projection machines used for other sports such as tennis. Reviewed literature highlights the deficit in visual information in the form of an arm and hand when using these machines. Hence a cricket bowling machine was developed with an arm and hand. The usability, functionality, repeatability, and accuracy of the cricket bowling machine with an arm and hand was tested which had been previously designed and built by Loutan Jr. (2016) at The University of Trinidad and Tobago. A trajectory model was developed for an indoor environment and experimentally validated with data collected from extensive testing of the bowling machine using Pitch Vision hardware and software. A design procedure had to be formulated to determine what test had to be done and the method of collecting data. The testing, data collection and validation of the model was done with the cricket bowling machine in its current state with minor changes to the hand. The release angle at which the ball leaves the hand was found to have a significant impact on the length (distance along the pitch the ball bounces) of the delivery. Finally, the bowling machine was able to bowl various lengths and varying speeds consistently. The variation in speed placed the machine in the category of medium-fast, that is, speeds between 120 km/h (75 mph) and 130 km/h (81mph). Doi: 10.28991/HIJ-2021-02-02-04 Full Text: PDF
Implementation of Boost PFC in the Induction Heating System for EMI–RFI Suppression
Authors: Raman Rahul , Baruah Debanga Jyoti , Dey Saurav , Neog Padmini , Saharia Kritika Taniya
Published: May 2021

The present work deals with the design and performance analysis of high frequency resonant inverter based Induction Heating (IH) System employing Boost Power Factor Correction (PFC) technique to overcome the problems due to EMI and RFI. Most of the existing techniques use passive filters for harmonics attenuation that fails to meet the present day requirement because of drawbacks like considerably high THD, poor dynamic performance, etc. This paper presents a new control approach for boost PFC based on inner and outer loops to eliminate the problems due to harmonics in the IH system. The equivalent circuit parameter model of the IH system has been used to analyze the presence of harmonics and the incorporation of boost PFC at the input of the system shows its elimination as per the stringent EMI-RFI regulations. Moreover, attention has been paid off to the design algorithm of the boost PFC and a detailed mathematical analysis has been done to outline an approach for its parameter selection. A comparative analysis of the IH system with and without the incorporation of the boost PFC has been done in terms of the THD in the input current waveform. The findings of the present work show that the incorporation of Boost PFC eliminates the harmonics in the IH system in a better manner than the existing techniques. Doi: 10.28991/HIJ-2021-02-02-05 Full Text: PDF
Alternative Approach for Improvement Sustainable Supply Chain Management in the Large European Container Ports
Authors: Hinkka Ville , Mäkinen Reetta , Eckhardt Jenni , Lastusilta Toni
Published: May 2021

The main objectives of the EU transport policy belongs the limitation of the negative environmental impact from ports. Similarly, companies are adopting sustainable supply chain management practices to response the policy makers’ and consumers’ demands for sustainable operations. This paper aims to discover how the largest European container ports communicate about their efforts to improve the sustainability of their operations to find out how the ports themselves see their position as a part of transition towards more sustainable supply chain operations. Based on the study, different large European container ports consider environmental issues variously. The risk is that some ports may get competitive advantages by slipping in the environmental questions. Alternatively, if the port does not take sustainability questions seriously and it gets a bad reputation, the risk is that the customers and consumers do not accept the behavior of the port and shipping companies start to avoid that port. Doi: 10.28991/HIJ-2021-02-02-06 Full Text: PDF
Use of Blockchain Technology in Energy Banking and Electricity Markets
Authors: Jain S. K. , Khandelwal Paresh , Agarwal P. K.
Published: May 2021

The power system reforms worldwide have commoditized electric energy and thus the electricity market has been developed. With this, trading of electric energy takes place in various time-domain like the day ahead, real-time, etc. These transactions take place through over the counter (OTC) or Power Exchange (Px) which provide to the market participants the required platform and payment security. The transactions on OTC and Px requires a third-party platform and guarantee for contract & settlement, there incurs overhead cost. Since electric energy is a fungible commodity, it can be transacted very well with the old system like barter. Energy Banking is one such mechanism wherein one utility supplies the energy to another utility that need it more and in leisure, the energy can then be provided back. The requisite security of the transactions can be provided by blockchain technology. Energy banking is presently being done only on MW quantum basis with no price tag despite the cost being dependent on the demand-supply ratio. To ensure energy banking transactions in real-time and free from the perils of financial settlements, this article suggests the use of the Peer-to-Peer (P2P) model of blockchain technology for executing Smart Contracts mutually agreed upon by both parties and avoiding third parties overhead costs. Doi: 10.28991/HIJ-2021-02-03-03 Full Text: PDF
Síndrome Coronario Agudo: Índice Leucoglucémico para estratificación de riesgo en el Infarto Agudo del Miocardio
Authors: Cervantes Coka Manuel Antonio
Published: May 2021

El Síndrome coronario Agudo es el término operacional utilizado para definir la presentación clínica inicial del paciente y permite tomar una conducta terapéutica precoz. La cardiopatía isquémica, según datos de la Organización Mundial de la Salud en el 2009 cobro la vida de 15,000,000 de personas en el mundo. En nuestro medio es una de las emergencias médicas más frecuentes y de abordaje más heterogéneo, debido a la constante evolución en las herramientas diagnósticas y terapéuticas. Actualmente se ha convertido en uno de los focos de investigación clínica más abarcados por la literatura internacional. El presente artículo es la presentación de un estudio retrospectivo de investigación el cual se llevara a cabo en el Hospital Luis Vernaza de la ciudad Guayaquil por el servicio de cardiología con la población ingresada con el diagnóstico de Infarto Agudo de Miocardio (IAM) en los tres últimos años, cuyo objetivo es realizar un estudio prospectivo para cotejar los datos nacionales con los de la literatura internacional.
La Seguridad Informática
Authors: Rocha Haro Cristhian Alexander
Published: May 2021

Las tendencias actuales sobre tecnologías y sus avances, han dado una serie de facilidades a las personas, tanto en lo laboral como en lo particular, el hogar, lo social, las comunicaciones, etc. permitiendo crear entornos participativos más amplios. La conciencia en el uso de estas tecnologías donde la información que se proporciona es cada vez mayor, sugeriría un cambio de paradigma sobre los hábitos de relacionamiento con los demás. Inicialmente, la idea de una Aldea Global era solamente una teoría que afirmaba que algún día todas las personas podrían estar comunicadas a escala mundial, y no es sino gracias a las redes sociales, que actualmente se tiene acceso a una Aldea Digitalmente Global, pero ¿bajo qué términos y con qué tipo de consecuencias?. En las empresas, un programa de seguridad de la información es un plan para mitigar los riesgos asociados con el procesamiento de la misma, ante lo cual la innovación permanente es la clave para mantenerla; poder ir un paso adelante de aquellos que pretenden sustraerla. El presente artículo pretende enfatizar conceptos poco tratados que ayuden en la administración de información a uno de los eslabones más débiles en la cadena de la seguridad: el factor humano.
Ética en la Educación Superior
Authors: Gavilanes Yanes Patricia
Published: May 2021

Este ensayo surge como producto de la reflexión, luego de asistir a un Seminario Taller Internacional “Ética en la Educación Superior: una cuestión de seguridad nacional”, organizado por la Secretaría Nacional de Ciencia y Tecnología, SENESCYT, y otras instituciones gubernamentales. En él, disertantes de origen nacional e internacional, trataron el tema de la ética y bioética desde el ámbito de la formación profesional universitaria y desde la perspectiva de la actuación profesional policial y militar. En el currículo de cada carrera, está la asignatura Ética profesional, se dedujo que esta implementación es positiva, pero la diaria interacción docente-estudiante constituye el medio más relevante para “vivir la ética”, esta responsabilidad social también se la hizo extensiva a todas las funciones que ejerce la comunidad universitaria; la formación profesional induce a que el estudiante además de conocer leyes, códigos, reglamentos, etc., que regulan el ejercicio de la ética, debe ser capaz de asumir una actitud crítica y reflexiva, de respeto a la dignidad de todo ser viviente. Militares y policías basan su accionar en el sentido de vocación, integridad personal, demandas morales y ejercicio del poder sobre una base ética; del cumplimiento de estos preceptos, sólo la opinión pública puede dar fe.
Sistemas Oleohidráulicos
Authors: Saltos Medina Carlos Alberto
Published: May 2021

Mediante este artículo conoceremos cómo somos beneficiariosde la ingeniería a través del constante desarrollotecnológico que se ha dado desde la investigacióndel comportamiento de los fluidos y el descubrimientode un principio elemental como lo es el principio deBlaise Pascal, científico francés del siglo XVII, quiendedujo que la presión de un fluido confinado era iguala la fuerza sobre una superficie (P = F/A), fórmula querevolucionó el campo industrial y nuestra manera devivir, ya que esto implicaba una capacidad bárbara demultiplicar una fuerza.
Filosofía CRM como estrategia para pequeñas y medianas empresas de Milagro
Authors: Yance Carvajal Carlos Leonidas
Published: May 2021

Vivimos en tiempo de cambio, donde se hace necesario cada día que las organizaciones y Pymes sean más competitiva y el uso de estrategias CRM para retener clientes y crear fidelidad no solo permitirá que las organizaciones cumplan con sus objetivos de generar rentabilidad si no que también existirá un sentido de pertenencia hacia las empresas por parte de los clientes, consumidores, vendedores y empleados en general. En la presente investigación se utilizó un diseño metodológico para la definición del tipo de investigación a desarrollar, se emplearon los métodos teóricos y empírico. Se realizó un análisis de los datos, interpretación y verificación la hipótesis planteada dentro del trabajo investigativo. Se llegaron a conclusiones importantes que las PYMEs de la ciudad de Milagro deben implementar estrategias CRM alineadas a las necesidades del consumidor, lo que permitirá crear fidelidad y sentido de pertenencia de los clientes hacia la marca, producto u organización y recomendaciones de llevar a cabo nuestra propuesta que puede ser de gran contribución a la problemática existente que tienen las pequeñas y medianas empresas para ofrecer sus productos al comercio.
Securing Topsoil for Rehabilitation Using Fly Ash in Open-Cast Coal Mines: Effects of Fly Ash on Plant Growth
Authors: MATSUMOTO Shinji , HAMANAKA Akihiro , MURAKAMI Kaito , SHIMADA Hideki , SASAOKA Takashi
Published: May 2021

Rehabilitation is an important stage in mining operations for environmental conservation. However, the shortage of topsoil makesit difficult to achieve rehabilitation in open-cast coal mines. Securing topsoil by mixing soil with fly ash (FA), which is treated asan industrial waste, is expected to solve this issue in coal mines. While mixing soil with FA makes it possible to secure the topsoiland treat industrial waste simultaneously, the high alkalinity of FA and the dissolution of heavy metals from FA may inhibit plantgrowth. This study investigated the effects of FA in the topsoil on plant growth via vegetation tests with simulated topsoil mixedwith FA using Acacia mangium, a species of flowering tree: the FA mixing ratios were set to 0%, 20%, 40%, 60%, and 100%. Thegrowth of Acacia mangium was inhibited with increasing FA mixing ratio, especially from 60% to 80%. However, the growth rate ofAcacia mangium in an FA mixing ratio of 100% was nearly comparable to that in a mixing ratio of 40%. Furthermore, there wereno effects of the physical characteristics and pH conditions in the topsoil on the plant growth at any of the mixing ratios; meanwhile,the accumulated concentration of Al in the plant body increased significantly at an FA mixing ratio of 60%–80%. This suggeststhat the accumulation of Al, which inhibits plant growth, including root growth and its functions, in the plant body inhibited thegrowth of Acacia mangium. Therefore, the most important aspect in terms of rehabilitation concerning the use of FA for securingtopsoil is not the mixing ratio of FA but the amount of Al in the FA and the accumulation of Al in the plant body.
Possibilities of Siderite and Barite Concentrates Preparation from Tailings of Settling Pit Nearby Markušovce Village (Eastern Slovakia)
Authors: HREDZÁK Slavomír , DOLINSKÁ Silvia , ZNAMENÁČKOVÁ Ingrid , LOVAS Michal , ŠESTINOVÁ Oľga
Published: May 2021

The contribution deals with recovery of useful minerals such as siderite and barite from tailings collected in settling pit nearbyMarkušovce village (East Slovakia). The material form the pit was subjected to gravity pre-concentration and magnetic separationunder laboratory conditions with the aim to verify a possibility of siderite and barite concentrates preparation. A fraction of +0.2–1mm forming a 40.56 wt% of total grain size scale of the material from the pit and containing 35.71% SiO2, 22.55% Fe2O3, 7,12%Al2O3, 5.48% Ba, and 3.89% SO42– was tested in upgrading process. Thus, 78.18% of SiO2, and 60.41% of Al2O3 at loss 21.70%Fe2O3 and 2.09% of Ba were removed in gravity pre-concentration. The iron concentrate with the content of 44.33% Fe2O3 at Ferecovery of 77.29% in magnetic product was obtained. Barite pre-concentrate with the Ba content of 46.21% at Ba recovery of91.95% in non-magnetic product was won.
Evaluation of Grindability Behaviors of Four Different Solid Fuels Blending by Using the Hardgrove Mill
Authors: DENIZ Vedat
Published: May 2021

Grindability measurements are widely used in mineral and coal processing industry to determine resistance of materials to comminution.Grindability measurement as testing methods can be divided into two general categories; the Bond and the Hardgrovegrindabilities. Grinding characteristics of the mineral or coal blending have been studied by several researchers over many yearsand a wide range grinding variables has been investigated. In this study, because of the simplicity and the potential usage of themethod for the determination of the grindability of coals and their blending in a comparative scale, a Hardgrove mill were used toinvestigated the grinding behavior of four different solid fuels and their blending. Grindability of four different solid fuels such as;petroleum coke, coke coal, lignite and bituminous coal and their binary, ternary and quaternary blending were investigated by theHardgrove grindability test. The test results indicated that determine the existence of a very good relation between the Bond andthe Hardgrove grindability of the fuels, and relationship between experimental and calculated HGI values of the fuels blendingwere also shown as a very good. However, there is not obtain a good relation between proximate analysis results of the solid fuelsand HGI values of fuels blending.
Determination of The Optimal Dosage of Chemical Compounds in the Wastewater Treatment Process in Trang Bach Coal Mine: the Laboratory Scale
Authors: DOAN Manh Ha , MIJAŁ Waldemar
Published: May 2021

The pH index of Trang Bach coal mine wastewater ranges from 2,8 to 6, meanwhile, the content of Fe, Mn, and turbidity & suspendedsolids (TSS) are rather high and it is impossible to discharge the wastewater directly to the environment. In order to achievethe requirement of QCVN 40:2011/BTNMT standard – The national standard for industrial wastewater quality after treatment ofVietnam and other purposes, the wastewater need to be treated by several methods such as coagulation-flocculation or sedimentation.In this article, we intend to find the optimal dosages of chemical compounds for the TSS, pH, Fe and Mn treatment processfor Trang Bach coal mine wastewater in the laboratory modular.
Characterisation of Purified Gypsum and Insoluble Impurities Obtained from Phosphogypsum Waste
Authors: KALUDJEROVIC Lazar , ISEK Josip , VUKOVIC Nikola , MILOSEVIC Maja
Published: May 2021

In this study, the chemical and phase composition of two samples of phosphogypsum from the waste dumps of the Industry of ChemicalProducts “Elixir – Prahovo” (Serbia) were examined, as well as the possibility of recrystallization of gypsum from an aqueoussuspension of phosphogypsum. The negative effect of higher temperatures on the solubility of calcium sulfate (13.08 mmol/dm3 at95°C vs. 15.43 mmol/dm3 at 40°C) was utilized. In several repeated cycles, calcium sulfate component was progressively dissolvedin water at room temperature and then precipitated at 100°C, using the same liquid phase throughout the experiment. Therefore,phosphogypsum was separated into recrystallized (purified) gypsum, insoluble residue and supernatant, and the mass balance forthe experiment was calculated. Elemental, XRD and SEM-EDS analyses were performed on raw phosphogypsum, purified gypsumand insoluble residue. The whiteness of raw phosphogypsum and purified gypsum were determined and compared. The main objectiveof the study was to investigate the nature of insoluble impurities, in order to define and optimize the methods for their removalduring a potential industrial processing of phosphogypsum.
Is Sludge Water Diluate Stream from Electrodialysis Suitable for Agricultural Purposes?
Authors: ČERVENKOVÁ Michaela , CALÁBKOVÁ Katrin
Published: May 2021

Sludge water, a product of drainage of primary and activated sludge from the municipal wastewater treatment process, is rich innutrients, particularly nitrogen and phosphorus. Nitrogen and phosphorus are inorganic biogenic substances suitable for plantnutrition. Sludge water can be treated via electrodialysis. This process leads to two products, one is a diluate stream (solutionless concentrated than the input, contains some nutrients) and the other is concentrate stream (solution in which nutrients areconcentrated against the input). There is abundant research in nitrogen and phosphorus recovery from the concentrate stream, forexample in the form of struvite used for fertilizing. However, little attention has been paid to the huge volumes of diluate stream.The diluate stream can be used in agriculture as water suitable for irrigation, where the bonus of this product is a partial fertilizingcapacity. This way, wastewater can be used for irrigation and fertilizing having subjected the wastewater to agrochemical analyses.An important condition for the use of sludge water or diluate stream for irrigation is the absence of heavy metals and toxic substances.Still, if the water contains heavy metals, they can be removed with a relatively high success, for example by precipitation.Using wastewaster as water for agricultural purposes for irrigation is one of the new options to find new secondary sources of water.This theme is highly topical as it is important to reduce the consumption of quality water resources. These must primarily serve fordrinking purposes, and therefore it is necessary to search for alternative water resources.
Bacterial Community of Neutral Mine Drainage of Elizabeth’s Shaft (Slovinky, Slovakia)
Authors: KISKOVÁ Jana , PERHÁČOVÁ Zuzana , VLČKO Ladislav , SEDLÁKOVÁ-KADUKOVÁ Jana , KVASNOVÁ Simona , PRISTAŠ Peter
Published: May 2021

Neutral mine drainage is the less frequent subject of the interest than acid mine drainage but it can have adverse environmental eff ects caused mainly by precipitation of dissolved Fe. Th e aim of the study was to characterize the composition of bacterial population in environment with high concentration of iron and sulfur compounds represented by neutral mine drainage water of Elizabeth’s shaft , Slovinky (Slovakia). Th e pH value of drainage water decreased from 7.1 to 6.5 during the years 2008–2014. Direct microscopic observations, cultivation methods, and 454 pyrosequencing of the 16S rRNA gene amplicons were used to examine the bacterial population. Microscopic observations identifi ed iron–oxidizing Proteobacteria of the genera Gallionella and Leptothrix which occurrence was not changed during the years 2008–2014. Using 454 pyrosequencing, there were identifi ed members of 204 bacterial genera that belonged to 25 phyla. Proteobacteria (69.55%), followed by Chlorofl exi (10.31%) and Actinobacteria (4.24%) dominated the bacterial community. Genera Azotobacter (24.52%) and Pseudomonas (14.15%), followed by iron–oxidizing Proteobacteria Dechloromonas (11%) and Methyloversatilis (8.53%) were most abundant within bacterial community. Typical sulfur bacteria were detected with lower frequency, e.g., Desulfobacteraceae (0.25%), Desulfovibrionaceae (0.16%), or Desulfobulbaceae (0.11%). Our data indicate that the composition of bacterial community of the Elizabeth’s shaft drainage water refl ects observed neutral pH, high level of iron and sulfur ions in this aquatic habitat.
Nutrition services by health providers during antenatal consultations in Senegal: a comparison of observed versus self-reported practices
Authors: Ningue Elhadji Alioune Badara , Galibois Isabelle , Blaney Sonia
Published: May 2021

Background

Malnutrition is of concern among pregnant women in Senegal. This paper aimed to compare health providers’ self-reported practices to their actual provision of nutrition services during antenatal care (ANC) consultations.

Methods

A comparative study was conducted in a random sample of 27 health providers in the Kolda region. Two ANC consultations were monitored for each provider, and later compared to the data that were collected through a face-to-face interview. This provided us with the opportunity to assess the agreement between self-reported and observed actions namely clinical actions, verbal assessments and counseling.

Results

In general, the ANC providers reported similar extent of clinical actions that they performed. However, in verbal assessments, health providers over-reported inquiring about iron and folic acid intake (44% observed vs 89% reported) and its potential side effects (0% vs 33%), signs of vitamin A deficiency (0% vs 11%) and intake of parasite prophylaxis (18% vs 63%). They also over-reported the provision of counseling on the importance of avoiding tea/coffee (41% observed vs 74% reported), gaining appropriate weight (14% vs 44%), and eating specific foods (7% vs 52%).

Conclusions

Nutrition services during ANC should be improved, especially in the domains of verbal assessment and nutrition counseling. The possible causes of these discrepancies might be the time constraint for ANC, limited skills, or a low demand of pregnant women for nutritional guidance. Nutrition training and/or supportive supervision of health providers deserve more attention in order to improve the nutrition services and the overall quality of ANC.
A concorrência padrão x não-padrão em língua escrita: duas variantes em foco
Authors: Santos Genivaldo Guimarães dos , Kanthack Gessilene Silveira
Published: May 2021

Neste artigo, apresentamos os resultados de uma pesquisa que investigou o uso variável de ter X haver, com sentido de existir, e ter auxiliar modal na estrutura ter de e ter que seguida de verbo infinitivo, com sentido de necessidade ou obrigação, a fim de verificar se as variantes consideradas não-padrão estão implementadas ou não em língua escrita monitorada. Para tanto, utilizamos como corpus entrevistas veiculadas em dois suportes, Revista Veja, de circulação nacional, e Jornal A Tarde, de circulação regional. Para fundamentar o trabalho, recorremos a pressupostos teóricos de duas vertentes sociolinguísticas, a Variacionista e a Educacional.
DINAMIKA PEMIKIRAN RENAISANS EROPA MODERNISASI PENGARUH KEILMUAN ISLAM DALAM SEJARAH EROPA
Authors: Ricoo Muhammad
Published: May 2021

penulis sangat tertarik mengangkat judul makalah dinamika pemikiran renaisans Eropa modernisasi keilmuan Islam ke-Eropa yang dikaitkan dengan karya ilmiah Dr Mohammad Zaenal Arifin Anis M.Hum Pengaruh pendidikan humaniora dalam masyarakat Banjar dikalimantan selatan yang diterbitkan pada tahun 2015. Jurnal yang memiliki 20 Halaman. pembahasan nya ditujukan pada hal 1-10 pengaruh Islam dikalimantan selatan dan berkembangnya masuk nya agama islam.Renaisans, berasal dari kata Re, (kembali) dan Neitre (lahir) berarti kelahiran kembali. Dalam konteks sejarat barat, istilah ini mengacu pada terjadinya kebangkitan kembali minat yang sangat besar dan mendalam terhadap kekeyaan warisan Yunani dan Romawi kuno dalam berbagai aspeknya. Sarjana muslin menjadi jembatan dan perantara bagi kemajuan ilmu pengetahuan di dunia modern saat ini.dari dunia Islamlah, ilmu pengetahuan mengalami transmisi, diseminasi, dan proliferasi ke dunia Barat yang mendukung muculnya zaman Pencerahan (Renaisans) di Eropa. Melalui dunia Islam, barat mendapat akses untuk mendalami dan mengambangkan ilmu pengetahuan modern. Dalam sejarah terdapat tempat- tempat dan proses yang mempengaruhi pemikiran dan sains Barat oleh pemikiran dan sains Islam yaitu: Andalusia, Shaqalliyah (Sisilia), Perang Salib di Syria dan Sekitarnya, Qustanthiniyah (Konstantinopel). Bentuk Kontribusi ilmu pengetahuan Islam terhadap Bangsa Barat antara lain. Diantaranya: Kedokteran, Pertanian, Astronomi, Sosiologi, Matematika, Sejarah dan banyak juga yang mempelajari metode keilmuan dari orang-orang Islam di masa pertengahan. penerimaan atau penolakan modernisasi, terutama adalah sikap dan nilai, kemampuan menunjukkan manfaat unsur yang baru, dan kesepadanannya dengan unsur-unsur kebudayan yang ada. Ada kemungkinan bahwa modernisasi bertentangan dengan kebudayaan yang ada atau memerlukan pola-pola baru yang belum ada dan unsur-unsur tertentu dari modernisasi menggantikan unsur-unsur yang lama.
Primary caregivers attitude towards patients with mental illness: a survey study in psychiatric centre, SMS medical college, Jaipur, Rajasthan, India
Authors: Sharma Tulika , Singh Paramjeet , Phulwari Himanshu
Published: May 2021

The purpose of the present study was to find out the attitudes of primary caregivers towards mental illness. The hypothesis was “there would be a significant difference in the attitude of primary caregivers towards mental illness by people belonging to rural and urban areas.” The sample consists of 50 subjects (25 females and 25 males out of it, 25 were from the rural population & 25 were from the urban population). The age group consists of the participants was from 18 years to 65 years, and their education qualification was not an obligation. Personal data consist of demographic information was also collected. The scale “The Community Attitudes Towards Mental Illness scale (CAMI)” was developed by Taylor and Dear in 1981, was used to assess the attitude towards mental illness of the subjects. For statistical analysis, correlation and student t-test were used for the p-value and to found the differences in the attitudes of primary caregivers. The results showed variances in the primary caregivers’ attitudes between the rural area and the urban area.
Pembelajaran Sejarah Eropa
Authors: Arsandi
Published: May 2021

Perkembangan ilmu sejarah dalam mengupas penyebab dari fenomena sejarah atau kausalitas dengan pendekatan monokausalitas maupun multikausalitas mengalami kemajuan yang pesat. Namun, berbanding terbalik dengan pembelajaran sejarah yang masih sering menjelaskan kausalitas sejarah dengan yang tunggal (monokausalitas) atau egosentris tanpa pendekatan sebuah ilmu dengan penilaian hanya ranah kognitif. Padahal penyebab sejarah bisa dijelaskan oleh pendekatan sebuah ilmu (monokausalitas) dan beragam (multikausalitas) dengan pendekatan multidimensional.
Góc nhìn hoàn toàn mới cho giới khoa học về vấn đề tự tử
Authors: Lab SDAG
Published: May 2021

Trung bình trên thế giới cứ mỗi 40 giây lại có 1 người tự tử, đồng nghĩa với việc cứ mỗi năm lại có 800 nghìn người chết. Nhóm tác giả tại Trường đại học Phenikaa đã lý giải quá trình hình thành ý nghĩ tự tử theo một cách hoàn toàn mới, trong bài viết đăng trên Tạp chí International Journal of Environmental Research and Public Health mới đây.
The rule of twin prime numbers are infinite
Authors: Zhou Mi
Published: May 2021

Whether there are infinitely twin prime numbers is an unsolved problem. In this paper, we use a simple and clear method to find the rule that the twin prime numbers are infinitely.
PSYCHOLOGICAL ASPECTS IN LEARNING A FOREIGN LANGUAGE// International Journal of Educational and Scientific Research 4(12), 2021/ Chief Editor K. Kumpulainen /OEAPS OU - Tallinn, Estonia (Open European Academy of Public Sciences). Vienna, Austria 30.04.2021: OEAPS OU., 2021. P. 38-40.
Authors: Akhetova Gulzainab Saparovna
Published: May 2021

The article deals with the aspects of psychology on studying foreign languages and different principles are described in this article. Also, the article pays attention to the importance of psychology. So, psychology allows us to determine the psychological component of the content of teaching a foreign language at school — this is the formation of skills and abilities to use the language being studied for communicative purposes.