bluuebunny/crossref_metadata_2025 huggingface dataset:
INVESTASI MUDHARABAH SEBAGAI OPTIMALISASI PENGELOLAAN WAKAF UANG
Authors: Rachmi Cahya Amalia
Published: July 2020

Wakaf merupakan salah satu bentuk ibadah amaliyah yang berbeda dari zakat, infak dan sedekah karena memiliki sifat keabadian. Selain itu, hukum zakat adalah wajib, maka seseorang yang mengeluarkan hartanya untuk berzakat adalah karena hukumnya. Berbeda dengan wakaf yang merupakan penyerahan secara sukarela sebagian harta yang dimiliki, sehingga mereka yang mengeluarkan wakaf bertujuan untuk mendekatkan diri kepada Allah SWT. Bentuk wakaf yang banyak dikenal di masyarakat adalah wakaf benda tidak bergerak seperti wakaf tanah dan wakaf bangunan. Namun, sekitar abad ke-15 dimulai wakaf dengan benda bergerak berupa uang yang dikenal dengan wakaf tunai/wakaf uang. Pengelolaan wakaf uang dilakukan dengan menyerahkan kepada pengelola wakaf (nazhir) yang kemudian disalurkan dalam bentuk aset produktif atau melalui investasi pada sektor-sektor usaha yang tidak bertentangan dengan syariah. Keuntungan dari asset produktif dan investasi inilah yang akan disalurkan dalam bentuk layanan sosial. Salah satu investasi yang dapat dilakukan adalah deposito mudharabah. Deposito mudharabah merupakan bentuk kerjasama yang telah banyak digunakan di perbankan dimana nasabah menyerahkan uangnya untuk dikelola oleh bank yang kemudian bagi hasilnya diperuntukkan untuk wakaf.
Pengaruh Edukasi Investasi, Persepsi Return dan Persepsi Risiko terhadap Minat Berinvestasi Saham Syariah
Authors: Setyowati Sulis , Wulandari Diyah , Hana Kharis Fadlullah
Published: July 2020

This study aims to understand and analyze the effect of investment education, return perception and risk perception on investment interests in Islamic stocks. The population in this study were participants of the Islamic Capital Market School at IAIN Kudus 2020 with a sample of 50 respondents. Samples were taken using the random sampling method, and based on the Slovin formula. The questionnaire method was used for data collection in this study. The instrument trials were analyzed using validity and reliability tests. Data analysis techniques using descriptive statistical analysis, and inferential analysis consisting of multiple linear regression test, the coefficient of determination test, F test and t test. The results showed that investment education and perception of return did not significantly influence investment interest in Islamic stocks. Meanwhile, risk perception has a significant effect on interest in investing in Islamic stocks. Investment education, return perception, and risk perception are only independent variables that influence the interest of sharia stock investment (only 23.6%). That means there are still many other independent variables that can affect the interest in investing in Islamic stocks.
Kinerja Saham BRI Syariah Dengan BRI Konvensional
Authors: Muhammad Naufal Izza  , Musyaiyadah Zumrotul , Hana Kharis Fadlullah
Published: July 2020

Abstrak

Penelitian ini bertujuan untuk mengetahui dan menganalisis perbandingan kinerja bank BRI dengan bank BRI Syariah tahun 2018-2019 triwulan 2-4. Populasi dalam penelitian ini adalah perusahaan perbankan yang listing di Bursa Efek Indonesia dengan sampel yang diambil yaitu bank BRI dan BRI Syariah. Pengambilan sampel menggunakan metode purposive sampling. Pengumpulan data penelitian ini menggunakan metode studi pustaka serta metode dokumentasi. Uji coba instrument dianalisi dengan menggunakan uji normatif. Teknik analisis data menggunakan analisis fundamental. Hasil penelitian menunjukkan bahwa Kinerja saham antara bank BRI dengan BRI Syariah yang diukur dengan rasio Earning Per Share, Price to Book Value, Return on Asset, dan Dept to Equity Ratio menunjukkan perbedaan yang signifikan. Secara keseluruhan kinerja saham BRI lebih unggul dibandingkan kinerja saham BRI Syariah.Kata Kunci: Kinerja, Saham, Saham BRI Syariah, Saham BRI Regular
PERBEDAAN KEMAMPUAN BERBICARA ANAK YANG DIASUH ORANG TUA SENDIRI DAN YANG DIASUH OLEH PENGASUH (STUDI KASUS PADA 2 ANAK TETANGGA)
Authors: Sari Yuli astrina
Published: July 2020

This research is motivated by differences in parenting that can affect the development of children aged   2-3 years, especially in terms of the ability to speak. Based on observations made with regard to language and talk of children, are still limited in pronunciation and speech fluency. Through speaking, the child can communicate, convey thoughts, ideas and feelings so that children are able to interact and build relationships social surroundings. Therefore, the need for stimulation that can increase the child's ability to speak, one of them through the method of conversing. The purpose of this study was to describe the differences in the ability to speak of the children within their own and with cared for by a caregiver. This is a qualitative research with a case study approach. The technique used an expose facto. Expose facto selected, because the cases studied individual. The results indicate differences in the ability to speak between children raised by their own parents and those cared for by caregivers. The children raised by caregivers show a better development of speech skills than children raised by their own parents.
Penerapan Metode Eksperimen untuk Meningkatkan Keterampilan Proses Sains Anak Usia Dini
Authors: Luluk Iffatur Rocmah  , Nur Hidayatus Sholihah
Published: July 2020

This research is a classroom action research that aims to improve science process skills in early childhood. Science process skills are children's abilities in thinking and investigating the natural environment around a series of learning processes. These skills are abilities that use reason, reason and effective and efficient actions to achieve certain results. With science process skills children can find facts that occur in their environment. Science process skills in group B children in PAUD Tashwirul Afkar are still low, therefore experimental methods are applied in the learning process to improve the condition. The results of applying experimental methods with natural materials can improve the science process skills of group B children in PAUD Tashwirul Afkar. This is indicated by an increase in the percentage of children's science process skills since the action was taken at the pre-cycle, cycle I and cycle II. At the pre-cycle completeness the overall value of the child is 33%. In the first cycle the overall value of the child is 58% and in the second cycle the overall value of the child is 91%.
PENERAPAN KEGIATAN “PAPER QUILLING” UNTUK KETERAMPILAN MOTORIK HALUS ANAK USIA 5-6 TAHUN
Authors: Dedek Wahyuningtyas  , Isfauzi Hadi Nugroho  , Anik Lestariningrum
Published: July 2020

Problems faced by children related to softmotoric skills especially when coordinating small muscles to perform daily activities is when drawing using stationery correctly there is still holding a pencil, cutting also not too skilled, expressing movement in detail while the child should be standard age 5 These achievements have been good for 6 years. Responding to this problem, it was found that the Paper Quilling activity that was designed by the teacher using simple raw materials owned around the child and then carried out with the concept of creative play turned out to interest the child to better process the increased skills. The purpose of this study will describe how the results of the development of softmotoric skills skills after using Paper Quilling activities especially in students aged 5-6 years. The research design used is descriptive qualitative with assessment techniques using observation and documentation where the observation instrument was developed referring to the STPPA of softmotoric skills aspects of children aged 5-6 years. The subjects were 13 children  group B TK Pertiwi 2 Sidoarjo Kabupaten Nganjuk. The results of the data after being collected are analyzed using triaculation of data and then described in a natational manner by studying so that the softmotoric skills skills can be described. Based on the results of data analysis, it was found that the improvement of children's skills in softmotoric skillsic aspects could be improved by using Paper Quilling activities. From the results of this study it is recommended that Paper Quilling activities can be used by other institutions to further accomodate the application according to the stages of child development because it is proven effective.
MENGEMBANGKAN KEMAMPUAN KOGNITIF DALAM MENGENAL KONSEP BILANGAN 1 – 10 MELALUI MEDIA TELUR ANGKA PADA ANAK USIA 3 – 4 TAHUN
Authors: Mukhlish Safitri  , Intan Prastihastari Wijaya  , Dema Yulianto
Published: July 2020

Cognitive ability to recognize the concept of numbers is very important to be introduced early on, so children are accustomed to easily solving simple problems related to numbers. The problem found by researchers is that children have difficulty when asked to numerate objects, numerically order numbers, and connect images of objects with numbers according to the amount. In an effort to address this problem, the educator introduces new media, namely the number egg media made from used materials and designed as attractive as possible so that students were motivated to learn. This study aims to determine whether there is cognitive development in recognizing the concept of numbers 1-10 in children aged 3-4 years in the Playgroup Al-hikmah Kweden Karangrejo Ngasem District Kediri Regency between before and after the action. The research method used is classroom action research conducted in three cycles. This research involved subjects of 3-4 years old children totaling 18 students. The analysis technique in this research is quantitative descriptive technique by comparing learning completeness between the time before and after the action. The results obtained in the first cycle of 50%, and in the second cycle of 63.8%, while in the third cycle of 81.9%. From the results of the study it can be concluded that through the egg media numbers can develop cognitive abilities in recognizing the concept of numbers 1-10 in children aged 3-4 years.
MENGEMBANGKAN KEMAMPUAN BERHITUNG PADA ANAK DENGAN PERMAINAN TRADISIONAL CONGKLAK
Authors: Andrika Muji Lestaria  , Made Ayu Anggreni
Published: July 2020

Abstract

This research is motivated by the information that the traditional game congklak is considered to improve the children’s ability to count . The traditional game congklak is one of the learning media that can improve the children’s capability to count. With traditional congklak games it is expected that children can learn to count in a more enjoyable way. The problem formulation in this research is "Does the game tradisoanal congklak affect to the children’s capability to count?”. The purpose of this study is to determine whether the influence of traditional congklak games on the ability to count early childhood in group B in TK Ana Donowati Surabaya.This research uses pre-experimental design with one-group pretest-posttest design. Subjects in this study were 15 children. Data analysis applied in this research is different test technique of pre-test and post-test (t test) from observation of children activity to know the capability of children counting through congklak traditional game activity.The results of data analysis show that 8,16 dan  1,76 with extent α 0,05 and 2,62 at  α 0,01 ,  >  so H0  rejected and H1 (working hypothesis) accepted. It can be concluded that the traditional game congklak has an effect on the ability to count on the group B early childhood TK Ana Donowati Surabaya.
MENGEMBANGKAN KEMAMPUAN BERKOMUNIKASI ANAK MELALUI METODE BERCERITA DENGAN MEDIA HAND PUPPET
Authors: Dwi Renny Hidayati  , Ervin Nurul Affrida
Published: July 2020

The problem in this study is about learning media that are not maximal in the process and activities in class. This study aims to determine the communication skills of children by applying the method of telling stories using hand puppet media in group A children in Tk Aisyiyah Busthanul Athfal 57 Surabaya. The subjects of this study were the Group A2 TK Aisyiyah Busthanul Athfal 57 Surabaya, totaling 18 children. The type and research approach used in this study are quantitative pre-experimental methods, using one group pretest-posttest. From the results of this study concluded that the value of t arithmetic = 3.72 is greater than t table 1.739 with a significance level of 0.05% and 2.556 at a significance level of 0.01 with N = 18 which means the naught hypothesis (Ho) is rejected and the working hypothesis (Hl) is accepted. This proves that the working hypothesis (Hl) which states "there is a positive influence on the hand puppet media on children's communication skills in TK Aisyiyah Busthanul Athfal 57 Surabaya" is accepted.
Considerações sobre teníase e cisticercose em municípios do Vale do Jiquiriçá, Bahia
Authors: Julião F. S. , Santos H. B.
Published: July 2020

Teníase e a cisticercose são doenças parasitárias com séria repercussão na saúde pública, causadas pelos parasitos Taenia solium e T. saginata. Objetivou-se verificar a explanação em livros didáticos sobre teníase e cisticercose e suas abordagens pelos professores de Ciências e Biologia a seus alunos. Foram pesquisados dados sobre a ocorrência da teníase e da cisticercose nas Secretárias de Saúde de municípios do Vale do Jiquiriçá, Bahia.Realizou-se também entrevista com professores do Ensino Fundamental II e Ensino Médio das escolas públicas dosmunicípios baianos de Jiquiriçá, Mutuípe e Ubaíra. Além disso, foram feitas pesquisas bibliográficas nos livros didáticos utilizados nas escolas. Constatou-se que não há registro da prevalência da teníase e de cisticercose nos municípios investigados. No que tange a abordagem dessas infecções na Educação Básica, percebeu-se que os professores necessitam da complementação do conteúdo, pois nos livros didáticos as abordagens são sucintas, embora consigam abarcar as principais características destas doenças. Sugere-se interação entre os profissionais da saúde e profissionais da educação para prevenção e combate com melhores resultados
Apresentação
Authors: Santos Roberto Monteiro Gurgel
Published: July 2020

Com o intuito de dar prosseguimento a um dos projetos da Comissão de Jurisprudência do Conselho Nacional do Ministério Público, apresentamos o segundo número da Revista do Conselho Nacional do Ministério Público. A inspiração é a mesma: incentivar o debate sobre o papel do Ministério Público na sociedade, bem como a interação desta Instituição com outras organizações do Estado. Neste caso específico, as relações entre o Ministério Público e a Polícia. Não é demais ressaltar que o Conselho Nacional do Ministério Público (CNMP) consolidou-se como instituição fundamental na ordem jurídica brasileira. Além do papel de controle, o Conselho Nacional do Ministério Público também tem diversificado suas frentes de atuação, buscando debater a necessidade de coordenação das ações do Ministério Público e a avaliação do desempenho das funções constitucionais. Alguns exemplos dessas iniciativas são os diversos projetos iniciados ao longo dos anos por comissões temáticas, estimulando a discussão sobre o papel do Ministério Público no Estado Constitucional de Direito. O segundo número da Revista do Conselho Nacional do Ministério Público traz à discussão tema diretamente relacionado com o controle externo da atividade policial: as relações entre o Ministério Público e a Polícia. Na mesma linha do primeiro número da revista, a obra reúne contribuições de distintas tradições jurídicas, elaboradas por especialistas e pesquisadores reconhecidos nos respectivos países, além de um artigo do conselheiro Cláudio Barros Silva. A obra contou com o apoio de conselheiros, membro auxiliar, funcionários, bem como com a inestimável colaboração dos autores. Agradeço especialmente à Secretaria de Comunicação Social, que cuidou da edição deste número.
Analisis Implementasi Kaidah Fikih Lā Ḍarar Wa Lā Ḍirār dalam Kedokteran Modern pada Kasus Tindakan Operasi
Authors: Muhammad Nirwan Idris  , Kurnaemi Anita
Published: July 2020

The relevance of the principles of fiqh in interpreting the law of a number of cases in the world of modern medicine has long been applied globally by classical and contemporary fiqh scholars. Advances in technology in the field of medicine have given rise to a number of controversial medical treatments and measures. For this reason, this study was carried out to describe the concept of fiqh la> d}arar wa la> d}ira>r in formulating shari'a law in medical disciplines and the correlation between the two, then implementing it based on the case examples described. This study uses qualitative analytic research with a phenomenological approach. The results of the study concluded that medical treatment that violates the shari'ah code of ethics and poses a danger and damage to the patient concerned can be included in the la> d}arar wa la> d}ira>r rules. Examples of cases such as hysterectomy carried out due to medical and emergency interests, are permitted as the application of the rules of al-d}arar yudfa’ bi qadr al-imka>n. Then medical treatment is not carried out for reasons of treatment and emergency needs, such as changing parts of the body for beauty and trends, or taking actions that according to the medical there are dangers and negative effects that are greater than the benefits, then it can be included in the rules of ' dar’u al-mafāsid muqaddam ‘ala> jalbi al-mas}a>lih}. In the case of autopsy and eugenic abortion are included in the rule of the law iz{a> ta’a>rad{a mafsadata>n ru>’iya a’zamuhuma dararan bi irtika>bi akhaffihima>, for taking less harm should be done to avoid greater harm, and this is the most appropriate opinion on this issue.
Tradisi Te'nea dalam Perspektif Hukum Islam (Studi Kasus di Desa Majannang)
Authors: Hendra Wijaya  , Akbar Fadlan
Published: July 2020

The purpose of this research was to identify the description of te'nea tradition, to recognize the driving force behind the shift in the meaning of te’nea tradition, and to explain the view of Islamic law regarding te’nea tradition in Majannang Village, Parigi District, Gowa Regency. The research method employed field research studies with a case study format through sociological and normative approaches.. The results showed that te'nea tradition was initially conducted merely with the purpose of kinship and eating together with relatives in an effort to commemorate the ancestors of the Pajaiyya extended family. The shift of the meaning of te'nea tradition occurred due to healing phenomenon of a broken leg sufferer in Bungung Toa where the ritual of te'nea took place. The shift of the tradition of te'nea is very fatal because it is suspected to contain shirk which has implications for the haram of this tradition in the perspective of Islamic Law, but if the element of shirk can be eliminated then this tradition will be in line with the teachings of friendship which is mustahab (recommended).
BIOADSORPTION OF HEAVY METALS FROM THE PHARMACEUTICAL EFFLUENTS, CONTAMINATED SOILS AND WATER BY FOOD AND AGRICULTURAL WASTE: A SHORT REVIEW
Authors: Ziarati P. , Moradi D. , Vambol V.
Published: July 2020

Soil and water resources pollution by heavy metals, specially originated from anthropogenic sources, as a result of their toxicity ramification on human health, has been known as a major and serious environmental problem for last few decades. Particularly relevant is the problem of pharmaceutical wastewater, as this wastewater contains active pharmaceutical ingredients and a wide range of heavy metals. In the same time the food waste is commonly produced in all the steps of food life cycle, such as during agricultural production, industrial manufacturing, processing and distribution and even consumer-generated in the context of private households. Mostly they have high-value components such as phytochemicals, proteins, flavour compounds, polysaccharides, fibers, and which can be re-used as nutraceuticals and functional ingredients. The research aim is to study the potential of food and agricultural waste to remove heavy metals from contaminated water and soil. The study the potential of food and agricultural waste to remove heavy metals from contaminated water and soil was conducted on the basis of open scientific sources. Scientific sources were selected by keywords no later than 2003 or with high citation value. Bio-sorption is a relatively new process that has proven very promising for the removal of heavy metals from wastewater. Due to the higher affinity of the adsorbent for the adsorbate species, the latter is attracted and bound there by different mechanisms. The process continues till equilibrium is established between the amount of solid-bound adsorbate species and its portion remaining in the solution. The feasibility of using an adsorbent is based on the cost of the bio sorbent has to be optimum, as they often are made from abundant or waste material. Peel of citrus and pomegranate, vegetables peel, fruit pit shell, tea and herbal tea waste and agricultural waste mix demonstrate great potential as bio-adsorbent.
PEMBERDAYAAN PEREMPUAN DALAM MENINGKATKAN KEAKSARAAN USAHA MANDIRI
Authors: Hastuti Hastuti , Hanifa Lia
Published: July 2020

Pemberdayaan Perempuan Dalam Meningkatan Kewirausahaan Usaha Mandiri adalah bentuk layanan program untuk melestarikan keaksaraan  dengan memberdayakan masyarakat perempuan melalui kewirausahaan. tujuan utama dari program ini adalah meningkatkan keberdayaan perempuan buta aksara usia 15-59 tahun, melalui peningkatan pengetahuan, keterampilan, sikap dan berusaha secara mandiri. Dalam hal ini masyarakat di berikan keterampilan guna untuk mengembangkan potensi sumber daya manusia yang ada sehingga masyarakat menjadi berdaya. Pemberdayaan perempuan melalui program Keaksaraan Usaha Mandiri dalam proses kegiatan pembelajarannya menekankan pada pendidikan keterampilan yang berpeluang menjadi suatu bidang usaha yang sesuai dengan minat dan potensi yang dimiliki  oleh warga perempuan.
PENANGGULANGAN KENAKALAN ANAK DAN REMAJA, DAMPAK DAN PENANGANANNYA
Authors: Tyasasih Ratnaning
Published: July 2020

Tujuan dari pengabdian ini adalah untuk menyediakan siswa dengan pemahaman tentang bentuk-bentuk kenakalan, faktor-faktor yang menyebabkan kenakalan (Kenakalan anak-anak dan remaja) dan cara menanganinya berdasarkan hukum dan peraturan di Indonesia. Metode yang digunakan adalah dengan konseling dalam bentuk materi paparan, diskusi dan tanya jawab. Hasil pengabdian ini adalah materi yang diberikan dalam konseling tentang Deliquency of Children diterima dengan baik oleh para siswa dan mereka memberikan tanggapan dan tanggapan yang baik dengan berbagai macam pertanyaan berbobot yang diajukan selama konseling. Melalui dedikasi ini diharapkan untuk menjadi upaya preventif agar para siswa tidak melakukan perbuatan yang termasuk kenakalan demikian juga untuk mencegah anak-anak atau siswa dari masalah hukum yang dapat timbul dari kenakalan anak-anak dan remaja.
PKM PELATIHAN PEMBUATAN MEDIA AUDIO VISUAL PADA GURU PAUD INKLUSI UNTUK SISWA DOWN SYNDROME DI KECAMATAN SITUBONDO
Authors: Puspitaningtyas Amalia Risqi
Published: July 2020

Pengabdian yang dilakukan bertujuan untuk menambah pemahaman, kemampuan ketrampilan seorang guru dalam pemberian materi pembelajaran yang inovatif  bagi siswa khususnya siswa down syndrome.Media pembelajaran memiliki peranan yang penting dalam kegiatan belajarmengajar,dalam proses belajar mengajar guru  tidak bisa menyamakan   antara mengajar anak normal dengan anak berkebutuhan khusus, karena kebutuhan keduanya sangat berbeda dalam pembelajaran. Anak berkebutuhan khusus perlu cara khusus terkait pemberian materi,  sehingga guru harus selektif dalam menggunakan media pembelajaran.  Materi pembelajaran bagi anak down syndrome memerlukan kreativitas yang ekstra dan media pembelajaran yang benar-benar menarik agar potensi yang sudah ada pada anak dapat berkembang lebih optimal, karena anak down syndrome memiliki kelainan fisik. Metode yang digunakan yaitu tiga tahapan diantaranya  tahap persiapan, tahapan pelaksanaan dan tahap tindak lanjut kegiatan. Untuk megupayakan peningkatan dalam pemahaman materi terkait pengenalan huruf  maka haruslah guru diberikan pelatihan dalam media pembelajaran. Kegiatan pelatihan ini memberikan pembinaan bagi guru PAUD Inklusi untuk mengembangkan media pembelajaran yang inovatif bagi anak down syndrome pelatihan ini dilaksanakan kurang lebih satu bulan. Selama pelatihan guru sangat antusias dalam mengikuti pelatihan ini dan diberi kesempatan dalam berdisukusi dan bertanya kepada narasumber jika ada permasalahan untuk mencapai solusi yang tepat. Luaran yang diharapkan dari penelitian ini guru paud dapat membuat media pembeljaran yang lebih inovatif dan kreatif.
Analiza utjecaja mikroklimatskih uvjeta u učionicama na rezultate vrednovanja učenika
Authors: Banić Bojan , Banić Janja , Novosel-Martinić Vesna , Veršić Andreja
Published: July 2020

U školskoj godini 2018./2019. u Prvoj gimnaziji Varaždin provedeno je istraživanje mikroklimatskih uvjeta na rezultate vrednovanja učenika. Cilj našeg projekta je dokazati ili opovrgnuti utjecaj mikroklime na uspješnost učenika i to u konkretnim situacijama, odnosno prilikom uobičajenog načina provjera znanja: pisanih provjera. Budući da se i ispiti državne mature u ovom trenutku temelje na takvom modelu provjere znanja, smatramo da je važno identificirati korelaciju između mikroklime i uspješnosti učenika na provjeri znanja, a u slučaju potvrde značajnog utjecaja doprinijeti i razvoju standarda uređenja postojećih školskih prostora ili izgradnji novih. Ispitivani mikroklimatski uvjeti bili su temperatura, relativna vlažnost, strujanje zraka. Testiranje je provedeno u 10 različitih učionica i 5 različitih predmeta ili skupina predmeta. Rezultati ukazuju na lošije rezultate vrednovanja pri većim odstupanjima od preporučenih vrijednosti promatranih mikroklimatskih uvjeta.
Virtualni model školskog atrija
Authors: Boj Nataša , Tonković Aleksandra
Published: July 2020

U današnje vrijeme globalizacije, težnja suvremene nastave je poticati učenike na istraživački rad putem projektne nastave. U III. osnovnoj školi Čakovec realiziran je projekt izrade virtualnog modela školskog atrija nastao korelacijom predmeta Matematike, Informatike i Tehničke kulture. U projekt su bili uključeni učenici sedmih i osmih razreda (N= 108) u šk. godini 2018./2019. Napravljena je analiza postojećeg stanja školskog atrija, te izrađen novi model primjenom informacijsko-komunikacijske tehnologije. Neposredno prije rada na projektu, ispitani su stavovi učenika o projektnoj nastavi u III. OŠ Čakovec. Uzorak je obuhvatio sve dostupne učenike (N=202, M=52%, Ž=48%) od petog do osmog razreda. U tu svrhu, proveden je anketni upitnik. Analizirani su i prikupljeni podaci statistički obrađeni (kvalitativno i kvantitativno, te prikazani grafički). Stavovi učenika su pokazali da je projektna nastava više zastupljena u izbornoj nastavi. Kroz rad na projektu učenici su primijenili matematičko-informatička znanja i vještine, kao i znanja i vještine iz predmeta Tehničke kulture. Aktivnosti učenika su bile: uočavanje određenih površina atrija (travnate, drvene i kamene) i izračunavanje površina istih u cilju izrade troškovnika, izrada analognog i digitalnog tlocrta u umanjenim mjerilima, izrada troškovnika postojećih materijala na temelju prikupljenih podataka s interneta. Nadalje, izrađen je virtualni model novog atrija primjenom informacijsko-komunikacijske tehnologije. 3D modeliranjem izrađeni su novi elementi za školski atrij – Pitagorino stablo i šesterostrana prizma. Ostali elementi poput ljuljački i cvijeća dodani su kao slike preuzete s interneta. Napravljena je prezentacija po fazama realizacije projekta. Kroz rad na ovom projektu učenici su primjenjivali stečena znanja i vještine, ponajviše iz područja Matematike, Informatike i Tehničke kulture. Potrebno je više istraživanja o projektnoj nastavi u višim razredima osnovne škole kao i definirati projektnu nastavu u kurikulumu.
Optimization of multiple performance responses of a fish feed pelletizer machine
Authors: Ighodalo Osagie , Amiebenomo Sebastian O. , Esabunor Temabor
Published: July 2020

This study details the assembling of a prefabricated fish feed pelletizing machine and optimization of some operational parameters such as die thickness, number of die holes, shaft speed and feed rate to produce high-grade fish pellets. The Taguchi methodology and Grey relational analysis (GRA) have been utilized to evaluate the multi-objective functions of interest such as pelletizing efficiency, throughput, energy requirements and pellets bulk density (g/cm3). The pelletizer machine performance evaluation test was carried at 3 levels of die thickness (8, 6 and 12 mm), number of die holes (30, 25, and 35), and feed rates (145, 130 and 160 g/h). The test for the performance indicators was conducted using L9 orthogonal array experimental design. The test data were analyzed using the Taguchi scheme employing the signal-to-noise ratio response with effects deduced. The GRA was utilized to assess multiple responses by fusing the Taguchi technique with the GRA. Thus the multi-objective optimization was transformed to a single equivalent objective function. The results of Taguchi optimization revealed that die thickness was the most influential parameter for the various control factors. In addition, optimum parameter combination was obtainable at medium die thickness (8mm), medium number of die holes (30), low shaft speed (200rpm) and medium feed rate of 145g/h. Analysis of variance for grey relational grade (GRG) reveals that die thickness and feed rate are the dominant parameters. The confirmation test performed shows that the GRG is enhanced by 2.19%.
Effect of under belting a multiple V-belt drive
Authors: Omorodion Ikponmwonsa I. , Amiebenomo Sebastian , Ozigi Bernard Abdulmaleeq  A.
Published: July 2020

The paper seeks to explore the effect of under belting a multiple V-belt drive on the life of a given sets of belts.  Under belting a device means using fewer belts than recommended by good design practices. The experiment investigates the incremental reduction of the number of belts by one and the attendant effect on the life of the whole belts set. The experiment is based on ten belts being the normal required to drive the load. The experiment emphasizes the effect of reducing one V belt on the life of the whole set. The experiment was based on 100% efficiency on the whole life of the whole sets from 10 belts, which is the required to drive the load.  Effect of belt creep was neglected.  It was progressively decreased by one and the whole belt life was evaluated based on the reduction
Model for invariant assessment of quality and efficiency
for research design of marine engineering facilities
Authors: Алексеев А.В.
Published: July 2020

Лавинообразный рост сложности современных объектов морской техники, морских интегрированных автоматизированных систем в защищенном исполнении, ужесточение требований к качеству процессов их создания и эксплуатации на всех этапах жизненного цикла обуславливают острую необходимость поиска инвариантных решений по их модельному представлению, а также технологии анализа, синтеза, оптимизации проектных решений. Более того, по количественному обоснованию конкурентной способности, путей их технологического развития. В результате проведения ряда поисковых и прикладных исследований обоснована целесообразность и возможность инвариантного модельного представления качества современных структурно сложных систем, а также мониторинга, прогнозирования и управления их качеством. Это позволяет на принципиально новом уровне решать задачи концептуального, исследовательского и конструкторско-технологического обоснования эффективных и оптимальных проектных и эксплуатационных решений за счет специфики инвариантного моделирования объектов.

The avalanche-like increase in the complexity of modern marine engineering objects, marine integrated automated systems in protected execution, and stricter requirements for the quality of their creation and operation processes at all stages of the life cycle make it necessary to search for invariant solutions for their model representation, as well as technologies for analysis, synthesis, and optimization of design solutions. Moreover, the quantitative justification of competitive ability and ways of their technological development. As a result of a number of search and applied research, the feasibility and possibility of invariant model representation of the quality of modern structurally complex systems, as well as monitoring, forecasting and quality management are proved. This allows us to solve the problems of conceptual, research and design-technological justification of effective and optimal design and operational solutions at a fundamentally new level due to the specifics of invariant object modeling.
Analysis of the energy efficiency design index reduction by steam turbine based waste heat recovery systems application for civil vessels
Authors: Медведев В.В. , Голубев Р.О.
Published: July 2020

Интенсивное совершенствование энергетики новейших судов гражданского флота требует актуализации информации по утилизационным возможностям паротурбогенераторов, работающих на ресурсе утилизации теплоты отработавших газов судовых главных двигателей и позволяющих существенно повысить энергетическую эффективность установки. Повышение энергетической эффективности востребовано сегодня как по экономическим, так и по экологическим соображениям.
В качестве основного критерия степени повышения энергетической эффективности судов новейших проектов при применении паротурбогенераторов был принят конструктивный коэффициент энергетической эффективности (ККЭЭ). Как основной инструмент для проведения расчётов использовалась программа для ЭВМ, предназначенная для выполнения проектного расчёта судового утилизационного водотрубного котла с пароперегревателем. Расчёты выполнялись для трёх типов судов: балкеров, СПГ-танкеров и контейнеровозов.
Подтверждена эффективность применения паротурбогенераторов для обеспечения соответствия требованиям по ККЭЭ. Показана зависимость эффективности его применения от типа судового главного двигателя и архитектуры энергетической установки в целом. Наибольшая мощность турбогенераторов была получена для СПГ-танкеров с единой электроэнергетической системой и для контейнеровозов с короткоходовыми главными малооборотными двигателями.

In terms of intensive development of energy solutions for civil vessels the revision of characteristics of auxiliary steam turbine generator sets utilizing main engines` exhaust gases, which provide significant energy efficiency growth for marine power plants, becomes very important. The energy efficiency improvement is currently essential because of the ecological and economical concerns.
The energy efficiency design index (EEDI) was accepted as a main criterion of the energy efficiency improvement for the modern ship projects equipped with steam turbine generator sets. The computer program created for the superheated steam producing exhaust gas boilers design was used as a main tool in the proceeded calculations. The results were received for three ship types: bulk carriers; LNG carriers and container ships.
The steam turbine generator sets application was confirmed to be an efficient method of keeping pace with EEDI requirements. The dependence of the turbine generator`s performance from a main engine type and a whole power plant`s architecture was demonstrated. The explored generators of LNG carriers with integrated electric propulsion and of container ships with short stroke slow speed main engines could provide the highest electricity production level.
Dynamics and acoustics of cavitation bubble in adverse external
pressure gradient
Authors: Рождественский К.В.
Published: July 2020

В статье приводятся аналитические и численные результаты по динамике и акустике кавитационного пузырька при повышении внешнего давления. В начале рассматривается модельная задача о сжатии пузырька вплоть до коллапса при мгновенном повышении давления. При этом уравнение Рэлея-Плессета рассматривается с учетом газосодержания, поверхностного натяжения и вязкости. Акустическое давление, вызванное сжатием пузырька, записанное в безразмерном виде, определяется как с привлечением формул, так и численным путем. Показано, что если наряду с паром, внутри пузырька имеется некоторое количество газа, скорость его сжатия и акустическое давление оказываются конечными вплоть до полного схлопывания. Кроме того, возможно многократное повторение цикла расширения-сжатия с затуханием амплитуды колебаний. На каждом периоде колебаний вблизи момента времени коллапса (достижения минимального радиуса) наблюдается импульсное возрастание давления. Во второй части аналогичное исследование проводится для случая, когда кавитационный пузырек возникает в закругленной носовой части подводного крылового профиля. При этом демонстрируется зависимость динамического поведения пузырька и вызываемого им в заданной точке контура профиля акустического давления от типа профиля, его толщины и угла атаки. По периоду первого цикла схлопывания спектральные параметры акустического импульса определяются как у эквивалентного треугольного импульса.

Presented in this paper are analytical and numerical results on dynamics and acoustics of a cavitation bubble in adverse external pressure gradient. First considered is a model problem of bubble collapse due to instantaneous increase of pressure. Therewith, the Rayleigh-Plesset equation is treated with account of gas content, surface tension and viscosity. Non-dimensional acoustic pressure caused by the compression of the bubble, is determined both with use of relevant formulae and numerically. It is shown that if together with vapor the bubble contains some quantity of gas, than its collapse rate and acoustic pressure during compression turn out to be finite. In addition, multiple expansion compression cycles are possible. For each period of bubble radius variation there occurs near the moment of collapse (moment of reaching a minimum radius) an impulse acoustic pressure rise. In the second part of the paper a similar investigation is carried out for the case when the bubble occurs near the rounded leading edge of a hydrofoil. Demonstrated therewith is the dependence of the bubble dynamic behavior and accompanying acoustic pressure pulses upon the foil type, thickness and angle of attack. Based on the period of the first bubble collapse cycle the spectral parameters of the induced acoustic pressure impulse are determined as for an equivalent triangular impulse.
Analysis of the Acceptance of Newly Constructed Mathematical Model for Islamic Unit Trust among Public
Authors: Mohamad Fauzi Siti Nadhirah , Ghazali Puspa Liza , Mohammed Foziah Nik Hazimi
Published: July 2020

A new mathematical model for Islamic unit trust fund was constructed based on the Integration model and the gaps discovered from existing model of Islamic unit trust in Malaysia. The gaps are payment of zakat/tax and additional benefit for investors. The aim of this study is to investigate the acceptance of public on this new constructed mathematical model. A total of 150 respondents were chosen among investors from Terengganu which has at least one unit of Islamic unit trust fund in Malaysia. The questionnaires distributed consist of four variables, where three were independent variables and one was dependent variable and analysed by using Statistical Package for the Social Science (SPSS). By using a Spearman’s correlation, it is found that each independent variable has moderate and strong correlation with the single variable. This can be concluded that the public has accepted this new constructed mathematical model. This study suggested that this new mathematical model is implemented by Islamic unit trust management in Malaysia and also, for investors to choose the Islamic unit trust which offer more benefits.
Composite Materials for Passive Antiradar Camouflage
Authors: Epure Cristiana , Zecheru Teodora , Epure Gabriel , Lazaroaie Claudiu , Iorga Ovidiu , Petre Razvan , Nita Gabriela , Munteanu Mihail , Stoica Dan , Plosnita Albert , Raditoiu Valentin
Published: July 2020

In this study, a new solution for the development of an antiradar camouflage by overlaying several mono-pigment polymeric structures in a composite structure is provided. In this respect, powder materials with antiradar properties (carbon nanotubes, graphite, active charcoal, aluminum trioxide) were embedded in polymeric matrices. The performances of the developed products were tested using an experimental device for the measurement of electromagnetic efficiency within the frequency range from 1 to 18 GHz.
Ether-Based Polyurethane Foam for Vacuum-Assisted Closure (V.A.C.) of Complicated Postoperative Abdominal Wound Dehiscence
Authors: Petca Aida , Negoita Silvius , Petca Razvan-Cosmin , Calo Oana , Sinescu Ruxandra Diana
Published: July 2020

Background. The macroporous polyurethane ether foam was introduced in the medical field, as early as the 90 ties, for the Vacuum-assisted closure (V.A.C.) of a wound. We describe our experience after treating abdominal wound dehiscence in a group of elderly gynecological patients with NPWT (Negative Pressure Wound Therapy), using ether foam coated with a silver layer. We reviewed elderly patients chart data that underwent abdominal surgery complicated with wound dehiscence treated with VAC for eighteen months. In all patients, the system used was the standard GranuFoam Silver dressing (different extents), which was usually replaced every 48/72 h. A total of 15 consecutive female patients were included. The median age was 67.3 (58-71) years. Duration of VAC treatment was median 14.2 (11-34) days, and we saw an improvement in wound repair but also clearance of S.S.I. on the third day after applying V.A.C. Ulta. Definitive secondary closure of the wound was obtained in all patients, as the infection�s site clearance. The abdominal VAC treatment with GranuFoam Silver dressing in patients with infected abdominal wound dehiscence is safe and has proper patient compliance. The latest evolution of the silver foam polyether dressing, in conjunction with NPWT therapy, offers a better antimicrobial effect and shorter healing stage.
Advantages of Intra-cardiac Polymer Coated Electrodes Leads in Patients with Diabetes Mellitus and Cardiovascular Implantable Electronic Devices
Authors: Pescariu Silvius Alexandru , Tudoran Cristina , Tudoran Mariana , Pop Gheorghe Nicusor , Pescariu Sorin , Timar Romulus , Andor Bogdan
Published: July 2020

Diabetes mellitus (DM) and cardiovascular diseases (CVD) represent worldwide, major health problems. Frequently, diabetic patients may require therapy with implantable intra-cardiac electronic devices. In this article, we analysed the complications related to the presence of polymer-coated electrodes leads occurred among 351 patients, carriers of implantable electronic intra-cardiac devices: permanent pacemakers (PPM), cardiac resynchronisation therapy (CRT) or implantable cardioverter-defibrillators (ICD). Of all these patients, 99 (28.20%) had type 2 DM (p=0.022), double than the prevalence of DM in the general population (11%). Only two patients with PPM and DM had fractures of electrodes leads and one was diagnosed with right heart infective endocarditis, but no non-diabetic patient developed any complications related to the presence of polymer coated electrodes leads.
Ultrasonication - a Potential Method Toward Chitosan Hydrogels
Authors: Iftime Manuela Maria , Angheloiu Marian
Published: July 2020

The main objective of the paper was to prepare eco-friendly chiral hydrogels from chitosan and betulinic aldehyde under ultrasonic radiation effect, targeting their use for enantiomeric separations. This strategy promoted the obtaining of the hydrogels by supramoleclar organization of the imine units bonding the betuline skeleton with chitosan into ordered clusteres, while not altering the physico-chemical properties of the reagents. FTIR, SEM, CD spectroscopy and POM techniques were used to prove the pelicularities of the hydrogelation mechanism under the ultrasonication. The stability of the hydrogels was investigated by monitoring the influence of the swelling in three media of diferent pH, by POM and CD. It was concluded that the chiral hydrogels prepared by ultrasonication are stable when the pH vary from acidic to basic, indicating the new synthetic approach as a valuable method to yield suitable materials for enatiomeric separations in medical field.
Technological Parameters Effects on Mechanical Properties of Biodegradable Materials Using FDM
Authors: Mazurchevici Simona-Nicoleta , Pricop Bogdan , Istrate Bogdan , Mazurchevici Andrei-Danut , Carlescu Vlad , Carausu Constantin , Nedelcu Dumitru
Published: July 2020

The additive manufacturing technology has made its debut in the industrial field about 30 years ago, when prototyped parts were usually used at the 3D printing stage during fabrication, to give the end customer a truthful concept of how a part will looks when conventional manufacturing techniques were used for final part fabrication. Because of the increasing demand for non-toxic, biodegradable materials and products, human society is always searching for new materials with specific applications, which are able to fulfill the above-mentioned requirements. Consequently, it is essential to identify the qualities of these materials and their behavior when subjected to various external factors, in order to find their optimal solutions for application in various domains. Manufacturing parts from biodegradable materials by 3D printing represents a major concern of industry specialists. The 3D printing process involves several parameters whose influence on the sample functional characteristics is a topical issue. In this paper are determined influences of certain technological parameters (thickness of the layer, filling speed, and part orientation on the printing bed) on some mechanical properties (tensile strength, structure, thermal analysis by DSC, and friction coefficient). Experiments were performed on specimens made of three materials: PLA, HD PLA Green, and Impact PLA Gray. A complete factorial experimental plan was used with three input parameters on two levels. Each experiment was repeated three times following the process stability. The obtained mean values of the tensile test were used in the analysis. The analysis was performed with the MiniTab application, which allowed the parameters hierarchy by influencing each mechanical characteristic studied, model development, and optimum values setting.