bluuebunny/crossref_metadata_2025 huggingface dataset:
Comparative Analysis of Custom-Designed Soft Pneumatic Actuators for Human Thumb Movement in Post-Stroke Rehabilitation
Authors: Ritonga Syahirul Alim , Herianto
Published: July 2023

One of the most potential applications of soft actuator is as wearable medical devices for post-stroke rehabilitation as a field that requires high levels of safety and adaptability. Incorporating SPAs into such devices can provide a safer and more secure solution, ensuring controlled movements that do not pose a risk to patients. However, there is a research gap regarding the design considerations for soft actuators specifically targeting the human thumb, which exhibits distinct motion patterns compared to the other fingers. This paper addresses this gap by developing and evaluating custom-designed SPAs for the movement of the human thumb, with a focus on post-stroke rehabilitation. Three SPA models (M1, M2, and M3) were proposed, and their performance in replicating the twisting motion of the thumb was assessed. The SPAs were fabricated using 3D printing, and image processing software was utilized for measurement and analysis. The results showed that the M3 model, with two sections of chambers in different axes, exhibited the best performance in generating the desired twisting angle. Integration of the M3 model with four finger-shaped SPAs enabled successful grasping and picking-like movements. This research contributes to the advancement of soft actuators in wearable medical devices, particularly in post-stroke rehabilitation, and holds promise for enhancing patient recovery and quality of life.
Analisis Logam Pada Air Bekas Cucian Mobil di Kota Gorontalo Menggunakan Spektrofotometri UV-VIS
Authors: Puluhulawa Rahmat , Piyohu Moh. Izwarto , Suleman Merlin , Sowati Iqlima Juma , Latibu Haina A. , Lasim Windi Sulistiyani
Published: July 2023

Air merupakan salah satu kebutuhan sehari-hari yang banyak digunakan oleh banyak orang. Setiap hari, dari segala aktivitas apapun pasti membutuhkan air sebagai penunjangnya. Penelitian ini bertujuan untuk mengidentifikasi kandungan logam pada air bekas cucian mobil. Metode yang digunakan dalam penelitian dilakukan dengan cara menganalisis kandungan besi, nitrat, nitrit sulfat, fosfat, dan sianida, kemudian analisis kadar menggunakan spektrofotometer UV-VIS. Hasil penelitian didapatkan bahwa pada uji analisis besi (Fe) dengan panjang gelombang 473 nm hasil yang tertinggi yaitu 3.515625 mg/L. Uji nitrat Panjang gelombang 523 nm hasil yang tertinggi 0.0067 mg/L. pada uji nitrit dengan Panjang gelombang 534 nm diperoleh hasil tertinggi yaitu 30.4127 mg/L. Uji fosfat panjang gelombang 650 nm, hasil tertinggi yaitu 0.004029. Pada uji sulfat Panjang gelombang yaitu 426 nm dengan hasil tertinggi yaitu 2.719008. Sedangkan pada uji sianida dengan Panjang gelombang 596 nm hasil tertinggi yang diperoleh yaitu 11.375 mg/L.
Smart Feeding berbasis IOT Menggunakan Android MQTT dan Nodemcu ESP8266
Authors: S Asmawati , Musyrifah Musyrifah , Mansyur Muh Fuad
Published: July 2023

Komponen utama dalam usaha budidaya ikan adalah pakan. Pemberian pakan yang kurang baik berdampak pada meningkatnya Feed Conversion Ratio (FCR), menurunnya kualitas air, dan kematian ikan. Tujuan dari penelitian merancang sebuah alat yang mempermudah para pemilik tambak dalampemberian pakan ikan dan dapat mengatur banyak pakan yang akan diberikan, durasi pemberian pakan, jarak area tebar, jadwal pemberian pakan sesuai dengan kebutuhan, serta siklus data pemberian pakan melalui android. Metode pelaksanaan ini adalah merancang serta pengujian peforma alat yang telah dibuat. Hasil pengujian menunjukan bahwa alat dapat menebar pakan sesuai dengan jadwal yang telah di tentukan. Berdasarkan hasil pengujian tersebut dapat disimpulkan bahwa smart feeding dapat menjadi solusi untuk masyarakat dalam hal pemberian pakan dengan menggunakan alat yang telah dibuat  dapat menjadi solusi terhadap permasalahan dalam pemberian pakan
Pembelajaran Statistik Deskriptif dan Statistik Inferensial Berbasis Web dengan Shiny R
Authors: Irwan Irwan , Sauddin Adnan , Astuti Reni
Published: July 2023

Sesuai dengan pentingnya statistik, mempelajari statistik memerlukan pemahaman yang kuat tentang ide-ide mendasar dalam statistik dan merupakan langkah paling penting dalam proses pembelajaran. Saat mempelajari statistik, beberapa orang mengalami ketakutan dan kecemasan karena menurut mereka statistik merupakan hal yang menarik, sementara yang lain menganggapnya statistika adalah hal yang tidak menarik. Oleh karena itu, menggunakan model simulasi dan visualisasi untuk mempelajari statistika sangat penting bagi instruktur dan pembelajar. Mencari tahu bagaimana cara membuat aplikasi R untuk mempelajari statistik deskriptif berbasis web dan statistik inferensial adalah tujuan dari penelitian ini. Penelitian ini menggunakan aplikasi R yang menggunakan paket shiny dan aplikasi laragon yang membantu berjalannya penelitian. Adapun hasil dalam penelitian ini bahwa dalam pembuatan aplikasi Shiny R diperlukan user interface dan server dalam membuat script, mendeploy ke web, mengupload ke web dan melakukan uji coba.

 

 

Kata Kunci : Statistik Deskriptif dan Inferensial, R, Shiny web
Peramalan Harga Cabai Rawit di Kota Bandung, Kota Bogor dan Kota Cirebon dengan Pendekatan GSTAR
Authors: Putri Dwi Fadila  , Ani Andriyati  , Maya Widyastiti
Published: July 2023

Pergerakan harga cabai di suatu daerah sangat mungkin dipengaruhi oleh pergerakan harga cabai di daerah sekitarnya. Ketika gangguan musiman terjadi di pusat produksi yang mempengaruhi hasil panen, maka secara otomatis terjadi kelangkaan stok yang mempengaruhi fluktuasi harga. Peramalan harga cabai rawit diperlukan untuk menjaga keseimbangan permintaan dan penawaran. Peramalan harga cabai rawit dalam penelitian ini menggunakan model Generalized Space Time Autoregressive (GSTAR) dengan pertimbangan bahwa model GSTAR merupakan salah satu model pemetaan yang berbasis space time untuk memodelkan, meramalkan data yang memiliki keterkaitan antar waktu sebelumnya dan keterkaitan antar lokasi yang berdekatan. Model ini sering digunakan dalam kasus kesehatan namun belum pernah digunakan dalam meramalkan harga cabai rawit. Data yang digunakan berupa laporan harga cabai rawit di Kota Bandung, Kota Bogor, dan Kota Cirebon, berupa data mingguan dari tahun 2018 sampai tahun 2021 dan terbagi menjadi dua bagian yaitu data in sample dan out sample. Pemodelan GSTAR yang digunakan menggunakan dua pembobotan yaitu pembobot normalisasi korelasi silang dan pembobot invers jarak.  Hasil analisis menunjukkan bahwa model GSTAR (2;1) I (1) dengan pembobotan normalisasi korelasi silang merupakan model terbaik dengan nilai RMSE dan MAPE terkecil sehingga lebih tepat digunakan meramalkan harga cabai rawit di Kota Bandung, Kota Bogor dan Kota Cirebon.
Penerapan Sistem Persamaan Linear Aljabar Max Plus Pada Masalah Ground Handling di Terminal 1 Bandara Internasional Juanda
Authors: Susilowati Eka
Published: July 2023

jadwal penerbangan adalah karena adanya pelayanan yang terjadi ground handling. Delay yang terjadi biasanya diakibatkan oleh ground handling yang tergantung dengan waktu pelayanan masing masing kendaraan ground handling. Pada penelitian ini, kegiatan ground handling yang dilakukan adalah menggosongkan area, melepas garbarata/tangga, menyalakan mesin, penumpang naik, pengecekan log book, mengangkut muatan, pemeriksaan keliling, pengisian bahan bakar, pelayanan kabin, pelayanan kamar kecil, pelayanan dapur, membongkar muatan, mengecek log book,penumpang turun, mengatur posisi  garbarata, mematikan mesin. Pelayanan ground handling sangat mempengaruhi waktu pemakaian gate sebuah pesawat. Tujuan dari penelitian ini adalah untuk menentukan penyelesaian system  atas aljabar max plus dengan  serta penerapan dalam masalah ground handling pesawat. Penelitian ini diawali dengan mengkaji sub penyelesaian terbesar dari system persamaan  . Selanjutnya, akan membahas aplikasi system  atas aljabar max plus dalam masalah ground handling pesawat di terminal I Bandara Juanda. Hasil penelitian adalah vektor bukan merupakan penyelesaian. Meskipun    bukan merupakan penyelesaian yang tepat untuk system persamaan di atas, bukan berarti pesawat akan mengalami penundaan jadwal keberangkatan. Akan tetapi, tidak terpenuhinya persamaan ketiga disebabkan karena penanganan pesawat di gate 3 selesai lebih awal.
Analisis Kualitas Air Sumur Bor Desa Sopura Kecamatan Pomalaa Kabupaten Kolaka
Authors: S Darlin , Agusriyadin Agusriyadin , Megawati Megawati
Published: July 2023

Telah dianalisis kandungan kualitas air Desa Sopura Kecamatan Pomalaa Kabupaten Kolaka berdasarkan beberapa parameter. Tujuan penelitian ini yaitu untuk mengetahui kualitas air sumur bor Desa Sopura melalui pengujian parameter kimia, fisika, dan biologi. Parameter kimia berupa pengujian kandungan Chemycal Oxygen Demand (COD), Biologycal Oxygen Demand (BOD), Dissolved Oxygen (DO), besi (Fe), dan Nikel (Ni). Parameter Fisika berupa pengujian Total Suspended Solid (TSS), dan Total Dissolved Solid (TDS). Parameter Biologi berupa pengujian bakteri Coliform. Penelitian ini diawali dengan pengambilan sampel air sumur bor di Desa Sopura Kecamatan Pomalaa Kabupaten Kolaka. Kemudian sampel diuji di Laboratorium. Pengujian sampel dengan parameter kimia dan fisika dilakukan di laboratorum Dinas Lingkungan Hidup Kabupaten Kolaka sedangkan parameter biologi diuji di Laboratotium Dinas Kesehatan Kabupaten Kolaka. Selanjutnya, hasil yang diperoleh dibandingkan dengan Baku mutu yang ada pada regulasi Permenkes No 492 Tahun 2010 Tentang Persyaratan Kualitas Air Minum dan Peraturan Pemerintah No 22 Tahun 2021 Tentang Penyelenggaraan Perlindungan dan Pengelolaan Lingkungan Hidup. Hasil penelitian menunjukkan nilai kandungan DO, BOD, TSS, TDS, besi, dan coliform (B-641/c) pada sampel air sumur bor Desa Sopura, masih belum melewati nilai ambang batas yang ditetapkan pemerintah. Sedangkan nilai COD, nikel, dan Coliform (B-639/a & B-640/b) pada sampel air telah melewati nilai ambang batas yang di tetapkan pemerintah.
O komunikacyjnych uwarunkowaniach polszczyzny w środowisku frankofońskim (na materiale wybranych podręczników z początku XX wieku)
Authors: Zarębski Rafał
Published: July 2023

Celem artykułu jest analiza trzech podręczników do nauki języka polskiego przeznaczonych dla osób francuskojęzycznych, powstałych na początku XX w., w perspektywie komunikacji wspólnotowej, a dokładniej w aspekcie: a) glottodydaktycznym (wpływ metod dydaktycznych na typ nauczanego tworzywa językowego), b) lingwistyczno-kulturowym (rola warstwy językowej – zwłaszcza leksykalnej – źródeł w transmisji kultury, np. liczne nazwy własne i szeroko pojęte nazwy realiów, np. Jan Sobieski, Mickiewicz, Warszawa, Wilanów, szlachcic, ułan) i c) dyskursywnym (w zakresie dyskursu memorialnego i tożsamościowego). Ustalono, że zastosowane metody i wieloaspektowe podejście komunikacyjne (uwzględniające kontekst instytucjonalny, ideologiczny i sytuacyjny, specyfikę metod nauczania, konkretną wspólnotę komunikacyjną i typ odbiorcy, relacje między językiem a kulturą, typy dyskursu, aksjologię) w stosunku do analizowanych podręczników mogą nie tylko poszerzać spektrum obserwacji, ale także stanowią ciekawą propozycję interpretacyjną dawnych źródeł glottodydaktycznych.
Pogranicza oficjalności i nieoficjalności w korespondencji elektronicznej nauczycieli
Authors: Piechnik Anna
Published: July 2023

Artykuł przedstawia zagadnienie pogranicza stylu oficjalnego i nieoficjalnego w korespondencji elektronicznej wysyłanej przez nauczycieli do rodziców. Materiał badawczy stanowią e-maile kierowane przez 112 nauczycieli do zbiorowych adresatów, którymi były grupy rodziców uczniów z kilkunastu szkół różnego szczebla. Na potrzeby opracowania przeprowadzono w 2022 r. wśród 370 pedagogów także badania kwestionariuszowe dotyczące komunikacji elektronicznej nauczycieli. W ankietach nauczyciele deklarowali dbałość o dostosowanie kształtu językowego listu elektronicznego do wzorców znanych z tradycyjnej oficjalnej korespondencji papierowej (w tym m.in. stosowanie formalnych formuł grzecznościowych inicjalnych i finalnych, podpisywanie wiadomości imieniem i nazwiskiem), a e-mail uznali za najczęstszą formę kontaktu z rodzicami oraz wymagającą szczególnej troski o stronę językową tekstu. Autentyczne teksty listów elektronicznych pokazują, że praktyka znacznie odbiega od deklaracji. Rama grzecznościowa badanych e-maili rzadko zawiera formuły oficjalne, a tradycyjny dystans towarzyszący kontaktom między stronami pozostającymi w relacji formalnej łamany jest także przez stosowanie słownictwa kolokwialnego i emotikonów. Wypowiedzi pedagogów wskazują, że bardziej oficjalny charakter zachowują listy elektroniczne kierowane do rodziców, z którymi kontakt jest trudny, zaś do grup rodziców budzących sympatię nauczyciele chętniej wysyłają wiadomości pozbawione wykładników oficjalności. Może to wskazywać na nową funkcję oficjalności bliską deprecjacyjnej oraz na odmienne od tradycyjnego wartościowanie tej kategorii.
A Cognitive Semantics analysis of David Goggins’ idea of “transforming” mindset
Authors: Drogosz Anna
Published: July 2023

The objective of the paper is an analysis of how David Goggins describes his life in his book Can’t Hurt Me. The analysis was conducted within the methodological framework of the Conceptual Metaphor Theory and Blending Theory. It has been established that the metaphors life is a journey and aspects of the self are individuals at war provide coherence to the story of his life, while conceptual blends are a mental tool used to reframe a situation and himself. As a result of implementing those blends in his thinking, David Goggins has developed a mindset that allowed him to transform from a broken teenager to “the strongest man alive”. This case study reveals how specific conceptual blends may impact not only cognition and language in general, as is argued in Cognitive Semantics, but also one’s emotional state, and consequently one’s physical performance.
Lexical inferencing in reading an English text: An introspective study
Authors: Kusiak-Pisowacka Monika
Published: July 2023

The aim of the paper is to present the results of a think-aloud study which investigated how Polish learners of EFL coped with unknown words in a written text. The following aspects of the inferencing process were explored: the strategies and types of knowledge sources used by the learners, the students’ individual patterns of strategy use, effectiveness in deducing word meanings and the reasons behind unsuccessful inferences. The results showed that the learners applied a range of cognitive and metacognitive strategies, with translation and paraphrasing as the most frequent ones, drawing on interlingual, intralingual and external sources of information. The students differed in their way of deducing the meanings of unknown words and the effectiveness of inferencing. The failures in deriving word meanings were attributed to poor skills of referring to global context and inability to follow semantic relations throughout the text.
Dziedzictwo chrześcijańskiej religii prawosławnej odzwierciedlone w nazwach własnych. Imiona a nazwy miejscowe
Authors: Magda-Czekaj Małgorzata
Published: July 2023

Artykuł przedstawia imiona świętych prawosławnych, które stanowią podstawę toponimów na obszarze południowo-wschodniej Białostocczyzny. Najliczniejszą grupę nazw miejscowych stanowią nazwy rodowe (50), w drugiej kolejności nazwy dzierżawcze (14), następnie patronimiczne (6). Do najpopularniejszych imion cerkiewnych, od których tworzono owe toponimy należą: Grigorij (stąd nazwy miejscowe: Gryćki, Hryce, Hryniewicze, Hryniewicze Duże, Hryniewicze Małe, Gregorowce), Simieon (→ Siemianówka, Sieniewice, Siemiony, Siemieniakowszczyzna), Wasilij (→ Waśki, Kłopoty-Waśki, Wasilkowo, Wasilków) oraz Ioann (→ Iwanki, Iwanówka, Waniewo). W ojkonimach przechowały się także różne zmiany językowe, które powstały w wyniku wzajemnych wpływów językowych (białoruskich, ukraińskich, polskich) na tym terenie i to ostatecznie uformowało kształt współczesnych odantroponimicznych toponimów. Nazwy te ukazują nie tylko różnorodność etniczną, kulturową i językową ludności pogranicza, ale są przede wszystkim autentyczne. Ich znaczenie polega na ich trwałości i obecności we współczesnym nazewnictwie.
Nazwy miejscowości w gminie Rzeczenica w województwie pomorskim
Authors: Lica Zenon Piotr
Published: July 2023

Tematem artykułu są nazwy własne miejscowości w gminie Rzeczenica w województwie pomorskim. Łącznie wyekscerpowano 120 nazw polskich i niemieckich (w tym także warianty fonetyczne i morfematyczne), które zostały poddane analizie strukturalnej oraz genetyczno-etymologicznej i semantycznej. Najwięcej wśród analizowanych onimów jest nazw topograficznych. Drugie miejsce pod względem liczebności zajmują nazwy dzierżawcze, a za nimi następują nazwy kulturowe i rodowe. Pod względem strukturalnym nazwy polskie są zarówno prymarne, jak i sekundarne, niemieckie zaś sporadycznie prymarne, najczęściej komponowane. Pojawiają się również hybrydy słowiańsko-niemieckie. Jeżeli chodzi o kwestie językowe, warto podkreślić występowanie w analizowanym materiale elementów dialektalnych zarówno dolnoniemieckich, jak i kaszubskich. Zgromadzone zapisy pozwalają także wyciągnąć wnioski na temat chronologii osadniczej: słowiańskiej oraz z czasów kolonizacji niemieckiej, krzyżackiej i późniejszych czasów.
Grecki apelatyw κόρθῡς ‘garście zżętego zboża, pokosy’ i jego relacja do polskiego dialektywu króda sterta snopów na polu
Authors: Kaczyńska Elwira
Published: July 2023

W artykule omówiono dwie nazwy zbiorowe (nomina collectiva) dotyczące terminologii rolniczej (gr. dor. κόρθῡς f. coll. ‘garście zżętego zboża, pokosy’; pol. dial. króda f. coll. ‘sterta snopów na polu’) i wskazano ich wspólną, indoeuropejską genezę. Podstawą derywacyjną greckiego kolektywu był zapewne dorycki apelatyw *κορθός m. ‘coś ściętego’, zachowany w dialekcie lakońskim języka starogreckiego, por. glosę Hesychiosa κορσόν ∙ κορμόν („korsón: kłoda”). Polski dialektyzm króda wywodzi się z prasłowiańskiego prototypu *korda, dla którego zrekonstruowano następujące znaczenia: ‘kupa snopów na polu’, wtórnie ‘kupa, sterta, stos (zwłaszcza kupa gałęzi)’ oraz ‘stos drzewa, sterta drewna opałowego’, skąd na skutek syngularyzacji pojawiły się sekundarne znaczenia: ‘zarzewie, ognisko’ oraz ‘ołtarz’. Wykazano, że z punktu widzenia indoeuropejskiego słowotwórstwa i etymologii grecko-słowiańskie kolektywa są pokrewnymi formacjami, które należy wiązać z rdzeniem werbalnym (pie.) *ker- ‘ciąć, ścinać, strzyc’, por. gr. κείρω ‘obciąć, ostrzyc (o włosach); ścinać, wycinać, zrywać (o roślinach)’, orm. k‘erem ‘drapać, golić’, lit. kertù, kirsti ‘rąbać, ścinać, kosić’, psł. *čerti ‘nacinać, oddzielać, obłupywać korę z drzew’, także *čersti (< *kert-ti) ‘ciąć, nacinać, wycinać’. Analizowane nazwy zbiorowe sprowadzają się do dwóch pokrewnych praform: pie. *kor-dh-uh2- : *kor-dh-eh2- (f. coll.).
Chytry chytremu nierówny – o ambiwalencji w wartościowaniu pojęcia reprezentowanego przez czeski leksem chytrost’
Authors: Wójcik Aleksandra
Published: July 2023

Artykuł próbuje odpowiedzieć na pytanie o przyczyny ambiwalencji w wartościowaniu pojęcia chytrost, które w języku czeskim rozumiane jest prymarnie jako wartość, a sekundarnie – jako antywartość. W tym celu sięgnięto po metody lubelskiej etnolingwistyki, które zostały wykorzystane do odtworzenia stereotypu chytrosti we współczesnej czeszczyźnie. W pierwszej części artykułu rekonstrukcja stereotypu przebiega w oparciu o dane systemowe, pozwalające ustalić treść znaczeniową leksemu, a w części drugiej – w oparciu o dane tekstowe, dostarczające informacji na temat wartościowania. W części trzeciej przedstawiona została ewolucja znaczeniowa leksemów chytrost i chytrý od okresu staroczeskiego po współczesność. Pokazuje ona, które elementy dawnego rozumienia pojęcia zostały zachowane w stereotypie, przyczyniając się do negatywnego wartościowania. W podsumowaniu zamieszczona została skrócona, syntetyczna definicja kognitywna pojęcia chytrost, która w przeciwieństwie do definicji taksonomicznych proponowanych przez słowniki języka czeskiego umożliwia wyraźne odróżnienie chytrosti od innych czeskich leksemów odnoszących się sfery umysłowej (np. moudrost). Wprowadzenie rozróżnienia w rozumieniu chytrosti jako cechy umysłu vs. cechy charakteru pozwoliło też wyjaśnić, w jakich kontekstach cecha ta wartościowana jest pozytywnie, a w jakich – negatywnie.
Construction of the Online Course “Automotive Engine Structure and Principles” under the Background of Building a First Class Undergraduate Program
Authors: Jin Guangcan , Liu Miao , Li Jin
Published: July 2023

Guided by the concept of “first-class undergraduate education” and centered on “students”, the original teaching curriculum system, course introduction, teaching outline, teaching plan, teaching contents, multimedia courseware and other teaching resources of “Automotive Engine Structure and Principles” course are optimized and reconstructed in this paper. At the same time, due to the limited teaching hours and resources of offline course, all of the optimized and restructured electronic resources of this course and teaching videos will be upload to the network platform to establish high-quality online course, so that students can review the course to learn the key and difficult knowledge points contrapuntally at anytime and anywhere.
Numerical Analysis of Laminar Natural Convection in Square Enclosure with and without Partitions and Study Effect of pPartition on the Flow Pattern and Heat Transfer
Authors: Lafta Ghashim Jassim Sajida
Published: July 2023

The problem of steady, laminar, natural convective flow in an square enclosure with and without partitions is considered for Rayleigh number (103-106) and Prandtl number (0.7). Vertical walls were maintained isothermal at different temperatures while horizontal walls and the partitions were insulated. The length of partition was taken constant. The number of partitions were placed on horizontal surface in staggered arrangement from (1– 3) and ratio of partition thickness (H/L= 0.033, 0.083, 0.124). The problem is formulated in terms of the vorticity-stream function procedure. A numerical solution based on a program in Fortran 90 with the finite difference method is obtained. Representative results illustrating the effects of the thickness and number of partitions on the contour maps of the streamlines and temperature are reported and discussed. In addition, the local Nusselt number is evaluated. Results show that the values of stream function (the strength of flow) in enclosure increases with the increasing Rayleigh number. As the number of partitions and thickness of partition increases, the strength of flow decreases. Mean Nusselt number increases with increasing Rayleigh number at different number of partitions. The numerical results are compared with available numerical results and experimental data and a good agreement is obtained.
Polyvinyl Alcohol – Sodium Nitrite Water Soluble Composite as a Corrosion Inhibitor for Mild Steel in Simulated Cooling Water
Authors: S. Yaro Aprael , M. Darweesh Teeba
Published: July 2023

The inhibitive action of polyvinyl alcohol –sodium nitrite (PVASN) composite on the corrosion of mild steel in simulated cooling water (SCW) has been investigated by weight loss and potentiodynamic polarization. The effect of composite concentration (PVA/SN) , pH, and exposure time on corrosion rate of mild steel were verified using 2 levels factorial design and surface response analysis through weight loss approach, while the electrochemical measurements were used to study the behavior of mild steel in (SCW) with pH between 6 and 8 and in absence and presence of (PVA) in solution containing different concentration of NaNO2. It was verified that all three main variables studied were statistically significant while their interaction is less pronounced.
Increasing of Oil Field Productivity by Implementation of Re-entry Horizontal Injection Well, Case study
Authors: N.Jreou Ghazwan
Published: July 2023

Water flooding is one of the most important methods used in enhanced production; it was a pioneer method in use, but the development of technology within the oil industry, takes this subject toward another form in the oil production and application in oil fields with all types of oils and oil reservoirs. Now days most of the injection wells directed from the vertical to re-entry of full horizontal wells in order to get full of horizontal wells advantages.This paper describes the potential benefits for using of re-entry horizontal injection wells as well as combination of re –entry horizontal injection and production wells. Al Qurainat productive sector was selected for study, which is one of the four main productive sectors of South Rumaila oil field. A simulation model – named as SRFQ was used in the present work to predict the re-entry horizontal wells performance.Four scenarios were suggested to cover the full scope of the study; those scenarios are different in manner of wells combinations. Cumulative oil production, ultimate recovery percentage are two criteria were used to predict the performance and comparison of scenarios.Results from simulation model (SRFQ) runs revealed that the productive sector can be continue to gain 1564.331 MMSTB till 2020, without changing to any existing injection and production wells status, which is called the base scenario. While scenario no.1 needs some of work over and remedies jobs, which gives more cumulative oil production reaches to 1698.481 MMSTB till 2020.On another side, scenarios no. 2 and 4 are the most important scenarios because re-entry horizontal injection wells were implemented. Very good and encourage results were gained over the bas scenario from the sector under study.At last, scenario no.3 was suggested just to predict the production capacity of the Al Qurainat sector with re-entry horizontal production wells and existing vertical injection and production wells, while the cumulative oil production reaches 3398.481MMSTB.
A Study of Water Flux through Forward Osmosis Membrane Using Brine\Fresh Water System
Authors: A. Al-Hemiri Adel , M. Kamil Marwah
Published: July 2023

The present work aims to improve the flux of forward osmosis with the use of Thin Film Composite membrane by reducing the effect of polarization on draw solution (brine solution) side.This study was conducted in two parts. The first is under the effect of polarization in which the flux and the water permeability coefficient (A) were calculated. In the second part of the study the experiments were repeated using a circulating pump at various speeds to make turbulence and reduce the effect of polarization on the brine solution side.A model capable of predicting water permeability coefficient has been derived, and this is given by the following equations:Z=Z0 +C.R.T/9.8(d2/D2+1) [Exp. [-9.8(d2/D2+1) A.M/p .t]-1]
Optimization of Activated Carbon Preparation from Date Stones by Microwave Assisted K2CO3 Activation
Authors: F. Abbas Asmaa , J. Ahmed Muthanna
Published: July 2023

The preparation of activated carbon (AC) from date stones by using microwave assisted K2CO3 activation was investigated in this paper. The influence of radiation time, radiation power, and impregnation ratio on the yield and methylene blue (MB) uptake of such carbon were studied. Based on Box-Wilson central composite design, two second order polynomial models were developed to correlate the process variables to the two responses. From the analysis of variance the significant variables on each response were identified. Optimum coditions of 8 min radiation time, 660 W radiation power and 1.5 g/g impregnation ratio gave 460.123 mg/g MB uptake and 19.99 % yield. The characteristics of the AC were examined by pore structure analysis, and scanning electron microscopy (SEM).The BET surface area and total pore volume were indentified to be 1144.25 m²/g and 0.656 m³/g, respectively.
Study the Performance of Low Cost Material (Peanut Hulls) for Dye Adsorption Using Inverse Fluidized Bed
Authors: Saber Majeed Najwa , Abood Alwan Shaimaa
Published: July 2023

The present study dealt with the removal of methylene blue from wastewater by using peanut hulls (PNH) as adsorbent. Two modes of operation were used in the present work, batch mode and inverse fluidized bed mode. In batch experiment, the effect of peanut hulls doses 2, 4, 8, 12 and 16 g, with constant initial pH =5.6, concentration 20 mg/L and particle size 2-3.35 mm were studied. The results showed that the percent removal of methylene blue increased with the increase of peanut hulls dose. Batch kinetics experiments showed that equilibrium time was about 3 hours, isotherm models (Langmuir and Freundlich) were used to correlate these results. The results showed that the (Freundlich) model gave the best fitting for adsorption capacity. Different size ranges of peanut hulls (PNH) were fluidized by a downward flow of an methylene blue dye dissolved in water in an inverse fluidization mode. In the inverse fluidized bed experiments, the hydrodynamics characteristics, the effect of initial methylene blue concentration Co 5, 10 and 20 mg/L, particle size 1.18-2, 2-3.35 and 3.35-4 mm, mass of adsorbent 25, 60 and 80 g, superficial fluid velocity 0.016, 0.019 and 0.027 m/s and effect of chemical modification were studied. The optimum conditions of adsorption in inverse fluidized bed were initial concentration was 5 mg/L, particle size was 1.18-2 mm size, mass of PNH is 80 g and superficial fluid velocity was 0.019 m/s. Also the adsorption capacity of PNH increased after modification by Nitric acid. UV-Spectrophotometer was used to determine the methylene blue concentration.
Research Octane Number Improvement of Iraqi Gasoline by Adsorption of n-Paraffins Using Zeolite Molecular Sieves
Authors: Sadoon Ahmedzeki Nada , Salah Alddin Mahdi Arowa
Published: July 2023

This study focused on the improvement of the quality of gasoline and enhancing its octane number by the reduction of n-paraffins using zeolite 5A. This study was made using batch and continuous mode. The parameters which affected the n-paraffin removal efficiency for each mode were studied. Temperature (30 and 40 ˚C) and mixing time up to 120 min for different amounts of zeolite ranging (10-60 g) were investigated in a batch mode. A maximum removal efficiency of 64% was obtained using 60 g of zeolite at 30 ˚C after a mixing time 120 min. The effect of feed flow rate (0.3-0.8 l/hr) and bed height (10-20 cm) were also studied in a continuous mode. The equilibrium isotherm study was made using different amounts of zeolite (2-20 g) and then simulated for n-hexane and n- heptane using Langmuir, Freundlich isotherms. Kinetic of the adsorption of n-hexane and n-heptane was investigated using pseudo first order, pseudo second order and intra particle model. The Research octane number (RON) for some selected samples was measured to show the effect of the removal on the quality improvement of gasoline. Results showed an increase of 5.5 units in RON using 40 g zeolite at 40 ˚C and after 120 ˚C min. also an increase in 7 units was obtained in the continuous mode after 30 min using flow rate of o.3 l/hr and bed height of 10cm. Experimental data for n-hexane and n-heptane was found to fit Langmuir isotherm with correlation coefficient of 92.7% and 88.8% for n-C7 and n-C6, respectively. Adsorption of n-hexane and n-heptane was found to follow second order kinetics with correlation coefficient of 99.9% and 99.8% for n-C7and n-C6 respectively. This study revealed a favorable adsorption of n-paraffins on zeolite 5A as indicated by the separating factor of 0.6 and 0.44 for n-C7and n-C6, respectively.
Formulation of New Equation to Estimate Productivity Index of Horizontal Wells
Authors: M. Farman Ghanim , Raouf Abdulamir Maha
Published: July 2023

Significant advances in horizontal well drilling technology have been made in recent years. The conventional productivity equations for single phase flowing at steady state conditions have been used and solved using Microsoft Excel for various reservoir properties and different horizontal well lengths.The deviation between the actual field data, and that obtained by the software based on conventional equations have been adjusted to introduce some parameters inserted in the conventional equation.The new formula for calculating flow efficiency was derived and applied with the best proposed values of coefficients ψ=0.7 and ω= 1.4. The simulated results fitted the field data.Various reservoir and field parameters including lateral horizontal length of the horizontal well (L), Skin factor (S), ratio of the vertical to horizontal permeability of the formation (KV/KH), and the vertical thickness of the productive zone (h) were studied and verified to generalize the suggested equation to estimate the horizontal well productivity indices for various reservoir kinds. This led to creating a new formula of flow efficiency equation that could be applied in AHDEB field.
Evaluation of Hydrocarbon Saturation Using Carbon Oxygen (CO) Ratio and Sigma Tool
Authors: S. Alameedy Usama
Published: July 2023

The main aim of this study is to evaluate the remaining oil in previously produced zones, locate the water productive zone and look for any bypassed oil behind casing in not previously perforated intervals. Initial water saturation was calculated from digitized open hole logs using a cut-off value of 10% for irreducible water saturation. The integrated analysis of the thermal capture cross section, Sigma and Carbon/oxygen ratio was conducted and summarized under well shut-in and flowing conditions. The logging pass zone run through sandstone Zubair formation at north Rumaila oil field. The zones where both the Sigma and the C/O analysis show high remaining oil saturation similar to the open hole oil saturation, could be good oil zones that do not appear to be water flooded. The zones where the Sigma analysis shows high residual oil saturation, which is close to open hole oil saturation and the C/O analysis, show medium residual oil saturation; this could indicate that these zones were fresh water flooded to a certain extent and they still keep some residual oil. If the C/O analysis shows low residual oil saturation, it indicates that these zones were probably fresh water flooded thoroughly. If both Sigma analysis and the C/O analysis show medium residual oil saturation, most probably these zones were saline water flooded to a certain extent and they still keep some residual oil.
Naphtha desulfurization by prepare Cu-Ni-zeolite adsorbent
Authors: A. Mohammed Abdul-Halim , A. Abdulwahhab Maha
Published: July 2023

For desulfurization of naphtha, NaY zeolite was prepared from Dewekhala kaolin clay (Al-Anbar region). For the prepared zeolite adsorbent, x-ray diffraction, sodium content, silica to alumina ratio, surface area, bulk density and crushing strength were determined. From the x-ray diffraction of the prepared NaY zeolite and by a comparison with the standard NaY zeolite, it was found that the prepared adsorbent in this work has approximately the same crystal structure as the standard. Adsorption process was done in a laboratory unit at 25 ᵒC and 4.1 h-1 LHSV. The experimental results show that the promoted adsorbent gives higher percentage of sulfur removal (82.15%) after 10 minute and reaching 40.15% after 120 minute. The adsorption capacity is equal 0.167 mmole "S"/ g after 10 minute while it reached up to 0.77 and 0.98 mmole "S"/g at 50 and 120 minute, respectively.
Pipeline embolization device dynamics: prediction of incomplete occlusion by elongation from nominal length
Authors: Sunohara Tadashi , Imamura Hirotoshi , Ohta Tsuyoshi , Koyanagi Masaomi , Goto Masanori , Fukumitsu Ryu , Fukui Nobuyuki , Takano Yuuki , Matsuoka Yoshinori , Teranishi Kunimasa , Naramoto Yuuji , Yamamoto Yasuhiro , Nishii Rikuo , Sakai Chiaki , Sakai Nobuyuki
Published: July 2023

OBJECTIVE

According to benchtop studies, the oversizing of a Pipeline embolization device (PED) relative to the parent artery leads to a significant increase in porosity and potentially compromises aneurysm occlusion as well as transitional zone (TZ) formation around the neck of aneurysms. However, no clinical assessment has been reported. Here this potential was studied by measuring the dynamic changes of PEDs in the clinical time course.

METHODS

The authors retrospectively examined 124 anterior circulation unruptured aneurysms in 114 consecutive patients treated with a PED between July 2015 and December 2020 at their institution. The authors excluded 77 cases of 68 patients with adjunctive coil embolization or multiple stents that could affect the PED dynamics and measurements, and 47 aneurysms in 46 patients were included. Measurements were performed before, immediately after, and 6 months after treatment, and then at intervals of 6 months to 1 year after that for nonocclusion cases.

RESULTS

Complete occlusion was achieved in 79.0% and incomplete occlusion in 21.0% at last follow-up. The PED length immediately after deployment was 136% nominal length. A multivariable regression analysis revealed that age (OR 1.11/year; p = 0.02) and PED elongation from nominal length (OR 1.31/mm; p = 0.012) were independently associated with a higher rate of incomplete occlusion at the last follow-up. TZ formation did not affect the occlusion rate.

CONCLUSIONS

PED elongation from the nominal length is a new predictor of incomplete aneurysm occlusion. The PED showed vascular remodeling by changing its diameter and length in the clinical course. TZ formation was remodeled and did not affect the occlusion rate.
IoT-Based Low-Cost Children Tracker System
Authors: M. Marhoon Hamzah , Ma’arif Alfian , Aljanabi Haider Dheyaa Kamil , Alanssari Ali Ihsan , Nadheer Israa
Published: July 2023

Recently many cases of missing children between ages 14 and 17 years have been reported. Parents always worry about the possibility of kidnapping their children. This work proposes an Android-based solution to aid parents to track their children in real-time. Nowadays, most mobile phones are equipped with internet service capabilities allowing them to connect with the world. The system's architecture is built on two main components: GPS satellite and IoT technology. The most important features of this work are the low cost, lightweight, and small size. The Blynk app is installed on the mobile phone and the GPS is attached to the NodeMCU microcontroller. The location information is reached through the Blynk app with the help of map services.
Redes alimentarias alternativas: Comientes y sus sentipensamientos para actuar
Authors: Ramírez García Sandra
Published: July 2023

Las redes alimentarias alternativas (RAA) se han analizado desde diferentes perspectivas con distintos objetos de estudio. El objetivo de esta investigación fue identificar los sentipensamientos que mantienen diferentes RAA en el área metropolitana de Xalapa, Veracruz en México, a partir de la experiencia de participantes de distintos grupos relacionados con el cultivo o la comercialización de alimentos agroecológicos. Para ello se usó la categoría analítica “comiente”, lo que puso en escena el aprovisionamiento de alimentos tanto de productores como de consumidores y otras RAA, además de la compra-venta de alimentos en mercados alternativos. El sentipensar de las y los comientes fue expresado en Círculos de diálogo, en los que cada comiente narró lo que vive al transitar por los lugares donde produce, intercambia, cocina y comparte comida. Se encontró que en todas estas redes se generan sentipensamientos que enlazan a las y los comientes a su territorio a través del trabajo para el autoabasto alimentario, el placer por comer alimentos regionales, el cuidado y la experiencia de enseñar-aprender. Asimismo, los Círculos permitieron a las y los comientes releer el mundo, obteniendo mayor conciencia de ellas y ellos mismos y de sus relaciones en el espacio social.
Pengaruh Kecerdasan Emosional dan Stress Kerja Terhadap Kinerja Karyawan pada PT. Bank Rakyat Indonesia (BRI) Syariah Cabang Padang
Authors: Ramadani Livia , Hadya Rizka
Published: July 2023

Abstract: This study aims to test and analyze 1) emotional intelligence's influence on employees' performance at PT. Bank Rakyat Indonesia (BRI) Sharia Padang Branch 2) the effect of work stress on employee performance at PT. Bank Rakyat Indonesia (BRI) Sharia Padang Branch 3) the effect of emotional intelligence and work stress on employee performance at PT. Bank Rakyat Indonesia (BRI) Sharia Padang Branch. The population is 37 people and the sample is 37 people. The data analysis method is Multiple Linear Regression Analysis and the determinant coefficient while the hypothesis testing method is the t-test and F-test. The results of the study show that the Emotional Intelligence Variable has a significant effect on employee performance at PT. Bank Rakyat Indonesia (BRI) Syariah Padang Branch, Work Stress Variable significantly affects employee performance at PT. Bank Rakyat Indonesia (BRI) Syariah Padang Branch, Emotional intelligence and work stress variables simultaneously have a significant effect on employee performance at PT. Bank Rakyat Indonesia (BRI) Sharia Padang Branch.

Abstrak: Penelitian ini bertujuan untuk Menguji dan menganalisis 1) pengaruh kecerdasan emosional terhadap kinerja kinerja karyawan pada PT. Bank Rakyat Indonesia  (BRI) Syariah Cabang Padang 2) pengaruh stress kerja terhadap kinerja kinerja karyawan pada PT. Bank Rakyat Indonesia  (BRI) Syariah Cabang Padang 3) pengaruh kecerdasan emosional dan stress kerja terhadap kinerja kinerja karyawan pada PT. Bank Rakyat Indonesia  (BRI) Syariah Cabang Padang. Populasi 37 orang dansampel 37 orang. Metode analisis data adalah Analisis  Regresi Linear Berganda dan koefisien determinan sedangkan metode pengujian hipotesis adalah Uji t dan Uji F. Hasil dari Penelitian menunjukan Variabel Kecerdasan Emosional berpengaruh signifikan terhadap kinerja karyawan pada PT. Bank Rakyat Indonesia  (BRI) Syariah Cabang Padang, Variabel Stress Kerja berpengaruh signifikan terhadap kinerja karyawan pada PT.Bank Rakyat Indonesia (BRI) Syariah Cabang Padang, Variabel kecerdasan emosional dan stress kerja secara simultan berpengaruh signifikan terhadap kinerja karyawan pada PT. Bank Rakyat Indonesia (BRI) Syariah Cabang Padang.
Pengaruh Karakteristik Individu dan Motivasi Terhadap Produktivitas Kerja Pegawai pada Satuan Kerja Pengembangan Sistem Penyediaan Air Minum Sumatera Barat
Authors: Susanti Refi , Salfadri Salfadri , Susi Yuliastanty
Published: July 2023

Abstract: This study aims to determine and analyze the effect of individual characteristics and work motivation on employee work productivity at the West Sumatra Drinking Water Supply System Development Unit, either partially or simultaneously. Methods of data analysis in this study using descriptive analysis, multiple linear regression, and the coefficient of determination. The results of this study indicate that individual characteristics, motivation, and work productivity in the West Sumatra Drinking Water Supply System Development Unit are in very good condition. And partially as well as simultaneously Individual Characteristics and Work Motivation have a positive and significant effect on the Work Productivity of the Work Unit Employees of the West Sumatra Drinking Water Supply System Development. Then the value of the Adjusted R Square variable Individual Characteristics and Work Motivation is equal to 0.470.

Abstrak: Penelitian ini bertujuan untuk mengetahui dan menganalisis pengaruh karakteristik individu dan motivasi kerja terhadap produktivitas kerja pegawai pada Satuan Pengembangan Sistem Penyediaan Air Minum Sumatera Barat, baik secara parsial maupun secara simultan. Metode analisis data dalam penelitian ini menggunakan analisis deskriptif, regresi linear berganda, dan koefisien determinasi. Hasil penelitian ini menunjukkan bahwa karakteristik individu, motivasi, dan produktivitas kerja pada Satuan Pengembangan Sistem Penyediaan Air Minum Sumatera Barat dalam keadaan sangat baik. Dan secara parsial maupun secara simultan Karakteristik Individu dan Motivasi Kerja berpengaruh positif dan signifikan terhadap Produktivitas Kerja Pegawai Satuan Kerja Pengembangan Sistem Penyediaan Air Minum Sumatera Barat. Kemudian nilai Adjusted R Square variabel Karakteristik Individu dan Motivasi Kerja, adalah sebesar 0,470.
Pengaruh Perputaran Kas, Perputaran Persediaan dan Perputaran Piutang Terhadap Profitabilitas pada Perusahaan yang Terdaftar dalam Indeks LQ 45 Bursa Efek Indonesia Periode 2016-2020
Authors: Telaumbanua Agustuniat , Nancy Meyla Delori
Published: July 2023

Penelitian ini bertujuan untuk melihat pengaruh perputaran kas, persediaan, dan piutang terhadap profitabilitas perusahaan yang terdaftar pada indeks LQ 45 di Bursa Efek Indonesia periode 2016-2020. Pengambilan sampel menggunakan teknik metode purposive sampling. Metode analisis yang digunakan dalam penelitian ini adalah uji asumsi klasik, analisis regresi linier berganda, analisis korelasi, dan koefisien determinasi. Untuk menguji hipotesis menggunakan uji t (uji parsial) dan uji F (uji simultan). Hasil penelitian ini menunjukkan bahwa secara parsial perputaran kas dan perputaran piutang berpengaruh signifikan terhadap profitabilitas sedangkan perputaran persediaan tidak berpengaruh signifikan terhadap profitabilitas. Secara simultan pengaruh perputaran kas, perputaran persediaan, dan perputaran piutang berpengaruh signifikan terhadap profitabilitas.
Pengaruh Gaya Kepemimpinan Kepala Desa Terhadap Partisipasi Masyarakat dalam Pembangunan Desa (Studi Pada Desa Matotonan Kecamatan Siberut Selatan Mentawai)
Authors: Siritoitet Alwi Husain , Nova Begawati
Published: July 2023

Penelitian ini bertujuan untuk mengetahui indikator apa saja yang dominan pada gaya kepemimpinan dan partisipasi masyarakat, serta apakah gaya kepemimpinan berpengaruh terhadap partisipasi masyarakat dalam pembangunan desa. Jenis data yang digunakan adalah data primer yang dilakukan melalui penyebaran kuesioner dan jumlah sampel dalam penelitian ini adalah sebanyak 67 responden masyarakat desa Matotonan. Penelitian ini menggunakan analisis regresi linier sederhana dan analisis determinasi, sedangkan metode pengujian hipotesis menggunakan uji-t. Hasil analisis deskriptif dengan menggunakan TCR indikator dominan gaya kepemimpinan kepala desa yaitu tipe direktif, sedangkan partisipasi masyarakat adalah partisipasi dalam menerima hasil. Hasil analisis gaya kepemimpinan berpengaruh positif dan signifikan terhadap partisipasi masyarakat desa Matotonan.
Pengaruh Dimensi Kualitas Pelayanan Terhadap Kepuasan Pelanggan pada Pelanggan Premium PT. PLN (Persero) UP3 (Unit Pelaksana Pelayanan Pelanggan) Padang
Authors: Dunnas Irsyad , Afrizoni Hosra
Published: July 2023

This study aims to analyze and determine the Effect of Service Quality Dimensions on Customer Satisfaction of Premium Customers of PT. PLN (Persero) UP3 (Customer Service Implementation Unit) Padang. The type of data is qualitative data which is used as quantitative data with primary data sources. Methods of data analysis in this study using descriptive analysis, multiple linear regression analysis, coefficient of determination, hypothesis testing t-test, and F test. The results of this study indicate that: 1. Reliability partially has a positive and significant effect on customer satisfaction on Premium Customers of PT. PLN (Persero) UP3 (Customer Service Implementation Unit) Padang. 2. Responsiveness partially has a positive and significant effect on customer satisfaction on Premium Customers of PT. PLN (Persero) UP3 (Customer Service Implementation Unit) Padang. 3. Assurance partially has a positive and significant effect on customer satisfaction on Premium Customers of PT. PLN (Persero) UP3 (Customer Service Implementation Unit) Padang. 4. Empathy partially has a positive and significant effect on customer satisfaction on Premium Customers of PT. PLN (Persero) UP3 (Customer Service Implementation Unit) Padang. 5. Physical evidence partially has a positive and significant effect on customer satisfaction at Premium Customers of PT. PLN (Persero) UP3 (Customer Service Implementation Unit) Padang. 6. Reliability (X1), responsiveness (X2), assurance (X3), empathy (X4) and tangibles (X5) simultaneously have a positive and significant effect on customer satisfaction on Premium Customers of PT. PLN (Persero) UP3 (Customer Service Implementation Unit) Padang.