bluuebunny/crossref_metadata_2025 huggingface dataset:
MERDEKA BELAJAR IN ACCOUNTING EDUCATION STUDENT PERSPECTIVE
Authors: Yusdita Elana Era , Astuti Elly , Panjawiyati Tika , Nuryani Lina
Published: July 2022

ABSTRACT

MBKM is a policy that frees students to synchronize learning activities with their needs in a rapidly changing future. This study was conducted to determine whether the MBKM program implemented was on the perception of independent learning for the students involved. Researchers used phenomenology with data collection techniques through interviews, observations, and documentaries. The results showed that in entrepreneurial activities, students felt free to learn because they had the experience of starting a business from scratch. Teaching assistant participants feel free because they can practice their courage to speak in public and experience developing modules. Research participants benefit from research and development knowledge and have the opportunity to create LKPD. Industrial apprentices are not independent because they are not fully involved in partner operational activities.

ABSTRAK

MBKM merupakan kebijakan yang membebaskan mahasiswa untuk melakukan sinkronisasi kegiatan pembelajaran dengan kebutuhannya dalam menyongsong masa depan yang berubah dengan cepat. Penelitian ini dilakukan untuk mengetahui apakah program MBKM yang diimplementasikan sesuai dengan persepsi merdeka belajar bagi mahasiswa yang terlibat. Peneliti menggunakan fenomenologi dengan teknik pengumpulan data melalui wawancara, observasi, serta dokumentasi. Hasil penelitian menunjukkan bahwa pada aktivitas kewirausahaan mahasiswa merasa telah merdeka belajar karena mendapat pengalaman merintis usaha dari nol. Peserta asistensi mengajar merasa merdeka karena dapat melatih keberanian berbicara di depan umum sekaligus berpengalaman membuat modul. Peserta penelitian mendapat manfaat pengetahuan penelitian pengembangan dan berkesempatan membuat LKPD. Peserta magang industri belum merasa merdeka karena tidak terlibat secara penuh dalam kegiatan operasional mitra.
Urdoxa, le deepfake d’information comme usage tactique du vague
Authors: FABRE Maxime
Published: July 2022

Cet article voudrait aborder la question du deepfake d’information en le positionnant face aux exigences de la sémiotique pragmatique américaine. Signe d’évidence, croyance fondamentale (urdoxa) le visage soumis au deepfake joue avec le réel, la vérité et la croyance. Il semble important pour le chercheur de poser les limites de ces concepts et de les éprouver face à ce défi d’« efficace du signe » qu’est le deepfake. En effet, la propédeutique à la théorie de C. S. Peirce expose une conception de la sémiotique rarement mobilisée en sciences de l’information et de la communication, « la logique du vague ». Cette conception pourrait permettre d’envisager une compréhension renouvelée du phénomène « d’hypertrucage » contemporain, en admettant l’élaboration d’une croyance scientifique d’enquête fondée sur la logique.
Active site imprinting on Ti oxocluster metal-organic framework for the photocatalytic hydrogen release from formic acid
Authors: García-Baldoví Alberto , Del Angel Raquel , Mouchaham Georges , Liu Shanping , Fan Dong , Maurin Guillaume , Navalón Sergio , Serre Christian , Garcia Hermenegildo
Published: July 2022

On-board hydrogen release from liquid organic carriers is a process that can make feasible the use of H2 as transportation fuel. Formic acid is considered as one of the most convenient liquid hydrogen organic carriers, since it can be easily obtained from CO2, it is water soluble and it makes unnecessary to recover the H2-depleted byproducts. Compared to the more conventional thermal catalytic decomposition of formic acid, the use of light in combination with a photocatalyst has been much less explored. Herein, we report a new paradigm in MOF photocatalysis that is the use of a microporous titanium oxocluster based metal-organic framework (Ti-MOF) endowed by formate-imprinted active sites, namely MIP-177_LT (MIP stands for Materials from Institute of Porous Materials of Paris, LT for Low Temperature), as a highly efficient photocatalyst for H2 release from formic acid without the need to neutralize acidity or the use sacrificial agents or noble metals. Noteworthy, a quantum efficiency of 22 % has been determined for the photocatalytic H2 release that is highly remarkable for a non-toxic noble metal-free photocatalyst.
Facile Supramolecular Strategy to Construct Solid Fluorophore@Metal-Organic Framework Composites
Authors: Trifoi Lavinia , Hodgson Gregory , Dogantzis Nicholas , Soha Sumaiya , Dayam Roya , Antonescu Costin , Botelho Roberto , Wylie Stephen , Impellizzeri Stefania
Published: July 2022

The design and synthesis of a microporous construct based on the entrapment of an emissive fluorescein derivative in a zinc 2-methylimidazolate (ZIF-8) metal-organic framework (MOF) is detailed. Synthesis of the MOF in the presence of a fluorophore enables the capture and dispersal of dye molecules within the ZIF-8 framework. Within the resulting supramolecular assemblies, the fluorophore components show excellent photophysical properties such as high emission and increased fluorescence lifetime, despite the tendency of the dye to undergo aggregation-caused quenching in the solid-state, as well as a 4-fold enhancement of the fluorophore’s photostability. The demonstration that supramolecular events can be invoked to construct solid fluorescent systems from separate components is realized. The encapsulation of the fluorescein in an enclosed subunit of the ZIF-8 framework was modelled using the density-functional tight-binding method. Furthermore, the fluorophore@MOF composite can be internalized by mammalian macrophage cells and transported to lysosomes without disrupting cell viability. In principle, this simple protocol can evolve into a general strategy for intracellular delivery of functional molecular components for targeted bioimaging or theranostic applications.
Mechanistic Insights of IscU Conformation Regulation for Fe–S Cluster Biogenesis Revealed by Variable-Temperature Electrospray Ionization Native Ion Mobility Mass Spectrometry
Authors: Lin Cheng-Wei , Oney-Hawthorne Shelby D. , Kuo Syuan-Ting , Barondeau David P. , Russell David H.
Published: July 2022

ABSTRACT: Iron-sulfur (Fe-S) cluster cofactors are required for the function of many critical cellular processes. These cofactors are assembled and inserted into apo target proteins by conserved Fe-S cluster biosynthetic pathways. In the ISC system of E. coli, the scaffold protein IscU assembles Fe-S cluster intermediates from iron, electrons, and inorganic sulfur, which is provided by the cysteine desulfurase enzyme IscS. IscU also binds to Zn, which mimics and competes for binding with the Fe-S cluster. Crystallographic and nuclear magnetic resonance (NMR) spectroscopic studies reveal that IscU is a metamorphic protein that exists in multiple conformational states, which include at least a structured form and a disordered form. The structured form of IscU is favored by metal binding and is stable in a narrow temperature range, undergoing both cold and hot denaturation. However, there is controversy over whether the structured or disordered form of IscU binds to IscS and functions in Fe-S cluster assembly. The recent development of variable-temperature electrospray ionization (vT-ESI) native ion mobility mass spectrometry (nIM-MS) enables probing the temperature dependence of macromolecular conformation and binding events in a single experiment. Here, vT-ESI nIM-MS results established that IscU exists in structured, intermediate, and disordered conformations. IscU samples shift towards high-charge states that have more extended conformations under extreme temperatures, consistent with cold/heat denaturation. A comparison of Zn-IscU and apo-IscU reveals that Zn(II) binding (i) attenuates the cold/heat-denaturation of IscU and promotes the refolding of IscU; (ii) favors the structured aand intermediate conformations and inhibits the disordered high charge states; and (iii) attenuates collisional induced unfolding (CIU) of intermediate conformations. Moreover, IscS was shown to alter the local conformation around the IscU active site, resulting in weakened Zn(II) affinity. Overall, these findings provide structural rationalization of the role of Zn(II) on stabilizing IscU conformation and the role of IscS on altering the IscU active site to prepare for Zn(II) release and cluster synthesis. This work highlights how vT-ESI-nMS can be applied as a powerful tool in mechanistic enzymology by providing details of relationships among temperature, protein conformations, and ligand/protein binding.
Pengaruh Likuiditas, Kepemilikan Institusional Dan Profitabilitas Terhadap Nilai Perusahaan Dengan Kebijakan Deviden Sebagai Variabel Moderasi Pada Perusahaan Sektor Pertambangan Yang Terdaftar Di Bursa Efek Indonesia Tahun 2014 - 2018
Authors: Ningsih Dita erdiya , Hermuningsih Sri , Wiyono Gendro
Published: July 2022

Tujuan dari penelitian ini adalah untuk menguji pengaruh langsung dan tidak langsung dari Likuiditas, Kepemilikan Institusional dan Profitabilitas terhadap Nilai Perusahaan dengan Kebijakan Dividen sebagai variable moderasi. Teknik pengambilan sampel menggunakan metode purposive sampling untuk menentukan sampel berdasarkan pertimbangan peneliti. Analisis data menggunakan Partial Least Square (PLS) yaitu SEM berbasis variance, dengan perangkat lunak SmartPLS. Berdasarkan hasil analisis menunjukkan bahwa (1) terdapat pengaruh negative dan tidak signifikan antara Likuiditas terhadap Nilai Perusahaan (2) terdapat pengaruh positif dan signifikan antara Kepemiikan Institusional terhadap Nilai Perusahaan (3) terdapat pengaruh positif dan signifikan antara Profitabilitas terhadap Nilai Perusahaan (4) terdapat pengaruh negative dan tidak signifikan antara Kebijakan Dividen terhadap Nilai Perusahaan (5) Kebijakan Dividen tidak dapat memoderasi antara Likuiditas terhadap Nilai Perusahaan (6) Kebijakan Dividen tidak dapat memoderasi antara Kepemilikan Institusional terhadap Nilai Perusahaan (7) Kebijakan Dividen tidak dapat memoderasi antara Profitabilitas terhadap Nilai Perusahaan.Kata kunci: Likuiditas, Kepemilikan Institusional, Profitabilitas, Kebijakan Dividen dan Nilai Perusahaan
TÓPICOS SOBRE MIGRACIÓN
Authors: Maceri Sandra , Mateu Silvana
Published: July 2022

En este trabajo se analiza por qué las personas prefieren permanecer en sus ciudades, pueblos o aldeas antes que migrar a ciudades donde las condiciones de vida son más favorables. Asimismo, se estudia la situación a la que se enfrentan los migrantes en los mercados de trabajo y salud conjuntamente con algunas recomendaciones de política que podrían ayudar a mejorar su calidad de vida. Por último, se plantea el tema de las ciudades-santuario y sus características en Estados Unidos y el Reino Unido.
LOS JUEGOS DE PALABRAS EN CANTINFLAS DENTRO EL IMAGINARIO SOCIOEDUCATIVO LATINOAMERICANO: UNA APROXIMACIÓN SEMIÓTICA EN “AHÍ ESTÁ EL DETALLE”
Authors: Soto Jairo Eduardo , Martínez Heredia Katia Milena
Published: July 2022

El artículo gira en torno a una investigación de índole semiótico de uno de los mejores humoristas del cine latinoamericano: Mario Fortino Alfonso Moreno Reyes nacido en Ciudad de México, 12 de agosto de 1911 fallecido el 20 de abril de 1993, más conocido como Mario Moreno y famoso por Cantinflas, fue un actor, guionista, productor, y comediante del cine mexicano. Quien solía hacer comedia, disfrazado de “peladito” un don nadie, o alguien “pelando bola”, con esperanzas de tener éxito. Cantinflas al igual que Charlie Chaplin, hacia uso de sátira social, ambos se admiraban mutuamente, Chaplin influenció notablemente a Cantinflas, de igual modo usó su ideología, con la diferencia que Cantinflas usaba el diálogo. Este proyecto de investigación tiene como hipótesis: el humor como discurso sociocultural que moviliza una carga simbólica en el imaginario social latinoamericano es un elemento importante en la educación de las emociones y los afectos.
Total abdominal histerektomi bilateral salfingooferektomi ameliyatı olan kadınların beden algıları ve benlik saygıları arasındaki ilişki
Authors: AKSOY CAN Ahu , BULDUM Aysu , DEĞİRMENCİ Filiz , VEFİKULUÇAY YILMAZ Duygu
Published: July 2022

Amaç: Araştırmanın amacı, total abdominal histerektomi bilateral salfingooferektomi (TAH-BSO) ameliyatı olan kadınların beden algıları ve benlik saygıları arasındaki ilişkinin belirlenmesidir. Yöntem: Tanımlayıcı tipteki araştırmanın örneklemini Mersin’deki bir üniversite hastanesinin kadın hastalıkları ve doğum servisinde TAH-BSO uygulanan 118 kadın oluşturmuştur. Araştırmanın verileri, araştırmacılar tarafından oluşturulan anket formu, Beden Algısı Ölçeği (BAÖ) ve Rosenberg Benlik Saygısı Ölçeği (RBSÖ) ile toplanmıştır. Verilerin tanımlayıcı istatistikleri; ortanca, ortalama, standart sapma, sayı ve yüzdelik değerleri ile verilmiştir. Verilerin değerlendirilmesinde; iki grup ortalamaları karşılaştırması için Mann Whitney U testi ile t-testi, ikiden fazla grup ortalamaları karşılaştırması için Kruskal Wallis testi ile one way ANOVA ve sürekli iki değişken arasındaki ilişkiyi belirlemek için Spearman korelasyon katsayısı kullanılmıştır. Bulgular: Kadınların yaş ortalamasının 50.13±9.57, evlilik süreleri ortalamasının ise 26.53±11.97 yıl olduğu belirlenmiştir. Kadınların %86.4’ünün evli, %40.7’sinin ilköğretim mezunu, %55.1’inin en az üç çocuğa sahip olduğu bulunmuştur. Kadınların %47.5’nin kanama şikayetiyle hastaneye başvurduğu ve %39’una göre uterusun onlar için hiçbir anlam ifade etmediği bulunmuştur. Kadınların BAÖ’den aldıkları puan ortalamalarının 151.05±26.64 ve RBSÖ’den aldıkları puan ortalamalarının 5.02±1.08 olduğu saptanmıştır. Araştırmada, BAÖ ile RBSÖ arasında istatistiksel olarak anlamlı bir ilişkinin olmadığı bulunmuştur (r= -0.113; p=0.224). Sonuç: Bu araştırmada, TAH-BSO ameliyatının kadınların beden algıları ve benlik saygıları üzerinde olumsuz bir etkiye sahip olmadığı belirlenmiştir. Bu sonuç kadınların TAH-BSO gibi çok sık yapılan bir jinekolojik ameliyata ilişkin bakış açılarının değiştiğini göstermektedir.
Sorption properties of wood impregnated with the fire retardant Burnblock
Authors: Humar Miha , Lesar Boštjan , Kržišnik Davor
Published: July 2022

The sorption properties of wood have a characteristic influence on some of its properties, such as the mechanical properties and susceptibility to fungal decay. Moist wood is more susceptible to fungal decay, and wood is often impregnated in order to protect it from fungal decomposition, photodegradation or fire. In particular, inorganic salts affect the sorption properties of wood. For this purpose, the sorption properties of Norway spruce wood impregnated with Burnblock refractory (uptake 38 kg/m³) were investigated. The microscopic analysis confirmed the presence of crystals of this in the cell lumina of wood tissue. Sorption properties were determined using an instrument capable of dynamic vapour sorption (DVS) assessment. DVS analysis confirmed that the sorption properties of impregnated spruce wood are comparable to those of non-impregnated spruce wood. However, the higher hysteresis at higher relative humidity is probably due to the presence of crystals in the cell lumina.
Dendrokronologija in absolutno datiranje kolišč na Ljubljanskem barju
Authors: Čufar Katarina , Merela Maks , Krže Luka , Velušček Anton
Published: July 2022

Na 16 koliščih na Ljubljanskem barju v Sloveniji je bilo med leti 1995 in 2021 z arheološkimi izkopavanji zbranih več kot 8.800 vzorcev z vodo napojenega arheološkega lesa. Večina vzorcev je bilo odvzetih iz pilotov, zabitih v zemljo, na katerih so bila zgrajena bivališča. Približno 20 % vzorcev je bilo iz lesa hrasta (Quercus sp.) in jesena (Fraxinus sp.), z več kot 45 branikami, ki jih je bilo mogoče vključiti v dendrokronološke analize in sestaviti kronologije širin branik za večino najdišč. Datiranje z uporabo dendrokronologije, radiokarbonskega datiranja in metode wiggle matching ter telekonekcije z nemško-švicarsko referenčno kronologijo so omogočili na leto natančno absolutno datiranje hrasta v časovnem okviru 3771–3330 pr. Kr. (kronologija BAR-3330), medtem ko so bili natančni radiokarbonski datumi pridobljeni za kronologije, ki pokrivajo obdobji 3285–3109 ± 14 kal. pr. Kr. (SG-VO) in 2659–2417 ± 18 kal. pr. Kr. (ZA-QUSP1). Potencial kronologij jesena, zlasti tistih iz 3. tisočletja pr. Kr., kjer ta vrsta prevladuje, še ni bil v celoti izkoriščen.
Biosorbtion, localization and bioavailability of zinc in Spirulina platensis culture
Authors: Jatupornpongchai A. , Phoopat N. , Limpirat W. , Ningsanond S.
Published: July 2022

A study of Spirulina platensis taking up Zn was conducted in modified culture media with
various Zn salts. Spirulina platensis cultured for 7 days in modified Zarrouk’s medium 1.6
µmol Zn of ZnSO4 (MZS) contained the highest Zn content. The MZS were 69.55±2.70
µg/g dry weight for Zn concentration, 63.11±1.40 %db for protein content, 0.46 day-1
for
specific growth rate (µ), 0.55 g/L.day dry weight cell for productivity (Px), and 1.50 days
for doubling time (td). The majority of Zn deposit was in the cytoplasm which was 2.7-
fold higher than that in the cell walls. Fourier transform infrared (FTIR) spectra showed
the decreasing of peak intensity for the amide groups after Zn uptake which indicated their
important role in the binding of Zn. The simulated digestion in gastric and intestinal tracks
of S. platensis cells cultured in MZS cells was the accessibility of 55.20±0.57 and
63.55±0.21%, respectively. After sequentially gastric and intestinal digestion, the Zn
availability was 34.63±0.95%.
Sintesis Model State-Space ke Embedded System dengan Metode Backward Difference
Authors: FERIYONIKA FERIYONIKA
Published: July 2022

ABSTRAKRealisasi sistem kendali berbasis state-space (seperti state feedback, LQR, MPC, SMC, dll) pada embedded system memerlukan informasi state hanya berdasarkan pembacaan output plant. Penelitian ini bertujuan mendapatkan nilai-nilai state suatu plant dengan menganalisis prosedur mengubah persamaan state-space ke persamaan difference (suatu bentuk persamaan yang dapat direalisasikan ke embedded system) menggunakan metode backward difference. Plant yang digunakan adalah kendali kecepatan yang modelnya didapat dari proses identifikasi. State observer ditambahkan pada model state-space plant untuk mengoreksi kesalahan dalam proses identifikasi. Verifikasi persamaan difference dilakukan dengan membandingkan output model terhadap sinyal plant, dimana didapat nilai RMSE-nya sebesar 0,94. Nilai state yang didapat selanjutnya diujicobakan pada kendali state feedback dengan risetime 3,23 detik, settling time 4,82 detik, overshoot 3,1 %, dan error steady state = 0. Berdasarkan hasil pengujian dapat disimpulkan bahwa metode backward difference dapat digunakan untuk mendapatkan nilai-nilai state plant sehingga berbagai algoritma kendali berbasis nilai state bisa direalisasikan pada embedded system.Kata kunci: state-space, backward difference, plant, modern control system, state feedback ABSTRACTRealization of state-space-based control systems (such as state feedback, LQR, MPC, SMC, etc.) in embedded systems requires state information only based on plant output readings.This study aims to obtain states of a plant by using the backward difference method. The plant used is a speed control whose model is obtained from the identification process. State observer is also added to correct the derived model. The verification shows that the obtained states can result output model with RMSE value is 0.94. The states are then tested on the feedback state control with a risetime of 3.23 seconds, a settling time of 4.82 seconds, an overshoot of 3.1%, and a steady state error = 0. This method can be used to obtain plant state values so that various state value-based control algorithms can be realized at the embedded system.Keywords: state-space, backward difference, plant, modern control system, state feedback.
Seleksi Fitur Aroma Teh Kombucha menggunakan ANN untuk Optimasi Kinerja Sistem E-nose
Authors: NUGROHO ADHITYA ALVIAN , WIJAYA WAHYU , HENDRY JANS , SUMANTO BUDI
Published: July 2022

ABSTRAKTeh kombucha merupakan hasil fermentasi antara teh manis dengan mikroba yang memiliki khasiat baik bagi kesehatan tubuh. Waktu yang dibutuhkan untuk fermentasi teh ini adalah 7 hingga maksimal 12 hari. Penentuan siap konsumsi dari hasil fermentasi biasanya mengacu dari umur fermentasi dan uji coba rasa oleh human tester. Selain menggunakan 2 cara tersebut, pemanfaatan sistem Electronic Nose (e-nose) dapat digunakan juga untuk melakukan identifikasi terhadap aroma teh kombucha selama proses fermentasi untuk mengetahui matang atau tidaknya. Akan tetapi timbul masalah yaitu hasil pembacaan e-nose menghasilkan data yang cukup banyak sehingga kurang efektif dan dapat menurunkan kinerja sistem, solusinya dapat diterapkan seleksi fitur menggunakan Artificial Neural Network berdasarkan dari Sum of Absolute Errors. Hasil dari penelitian ini mendapatkan 6 fitur terbaik dengan peningkatan nilai akurasi sebesar 97,22%, presisi sebesar 94,74%, dan sensitivitas sebesar 100,00%.Kata kunci: Teh Kombucha, Seleksi Fitur, E-nose, Artificial Neural Network, Sum of Absolutes Errors ABSTRACTKombucha tea is a fermented product of sweet tea with microbes that have good health benefits. The time required to ferment this tea is 7 to a maximum of 12 days. Determination of ready-to-consumption of fermented products usually refers to the age of fermentation and taste testing by a human tester. In addition to using these 2 methods, the use of the Electronic Nose (e-nose) system can also be used to identify the aroma of kombucha tea during the fermentation process to determine whether it is ripe or not. Problems that arise from reading e-nose produce quite a lot of data so that it is less effective and can reduce system performance, the solution can be applied to feature selection using an Artificial Neural Network based on the Sum of Absolute Errors. The results of this study get the best 6 features with an increase in accuracy of 97.22%, precision of 94.74%, and sensitivity of 100.00%.Keywords: Kombucha Tea, E-nose, Feature Selection, Artificial Neural Network, Sum of Absolute Errors
Peningkatan Bandwidth dan Gain Antena Mikrostrip Leaky Wave dengan Multi Slot untuk Aplikasi WLAN
Authors: IQBAL MUHAMAD WAHYU , ZULKIFLI FITRI YULI , RAHARDJO EKO TJIPTO
Published: July 2022

ABSTRAKPenelitian ini menggunakan antena microstrip leaky wave dengan menambahkan dua slot, yaitu E-slot dan U-slot ganda atau multislot pada frekuensi 6 GHz (5,925 GHz-6,425 GHz) untuk aplikasi WLAN. E-slot dan U-slot ganda digunakan untuk meningkatkan performa dari gain dan bandwidth. Hasil dari simulasi memberikan informasi antena mikrostrip leaky wave dengan penambahan E-slot dan U-slot atau multislot diperoleh hasil s-parameter memiliki nilai -23,196 dB, VSWR sebesar 1,164, bandwidth sebesar 615 MHz, dan gain sebesar 6,16 dBi. Hasil simulasi dari antena mikrostrip leaky wave dengan penambahan E-slot dan U-slot ganda atau multislot menunjukkan dapat meningkatkan bandwidth sebesar 130,038 % dan meningkatkan gain sebesar 34,15 % dibandingkan dengan antena leaky wave tanpa penambahan E-slot dan U-slot ganda.Kata kunci: Mikrostrip Leaky Wave, Multislot, Bandwidth, Gain ABSTRACTIn this study used microstrip leaky-wave antenna by adding, E-slot and double U-slot or multi-slot at frequency of 6 GHz (5,925 GHz – 6,425) for WLAN applications. E-slot and double U-slot are used to increase performance of the gain and bandwidth. The simulation result from provide microstrip leaky-wave antenna with the addition E-slot and double U-slot obatained s-parameter of - 23,196 dB, VSWR of 1,164, bandwidth of 615 MHz, and gain of 6,16 dBi. Simulation results from microstrip leaky-wave antenna with the addition E-slot and double U-slot show that can increase bandwidth by 130,038 % and increase gain by 34,15 % compared to microstrip leaky-wave without the addition E-slot and double U-slot.Keywords: Microstrip Leaky Wave, Multislot, Bandwidth, Gain
Model Proses Pengolahan Air Laut Metode Reverse Osmosis memanfaatkan Sumber Energi Sinar Surya
Authors: SIAHAAN PERLUHUTAN , SINAGA NAZARUDDIN , WINDARTA JAKA
Published: July 2022

ABSTRAKTeknologi membrane Cellulose Triacetate (CTA), Hollow Fiber (HF) dan Sel Surya Perovskite. Kemampuan membrane mereduksi air garam dan Perovskite mengonversi sinar surya. Model proses pemurnian air laut Reverse Osmosis (RO) menjadi air bersih di mana kebutuhan energi spesifik ditekan menggunakan Energi Dukung Turbin (EDT). Produksi air bersih kapasitas 3000 m3 per jam dengan kebutuhan energi spesifik (KES) 43,589.7 kWh. Efisiensi 50% KES kontribusi dari EDT dan membrane meredusi garam 99,5%. Kombinasi RO dan Perovskite serta didukung EDT efisiensi tinggi diperoleh dan dapat menurunkan tingkat gas emisi setara 1,547,048 ton CO2e per tahun.Kata kunci: air bersih, CO2, membrane, reverse osmosis, sel surya ABSTRACTTechnology of membrane is Cellulose Triacetate (CTA), Hollow Fiber (HF) and Perovskite Solar Cell. Membrane performance is to reduce of salt substance and Perovskite to convert irradiance. Model seawater purification process Reverse Osmosis (RO) converts into clean water however the requirement of specific energy is reduced which utilize of Energy Recovery Turbin (EDT). Production of clean water capacity 3000 m3 per hour require Specific Energy Consumtion (KES) 43,589.7 kWh of electrical energy. Efficiency 50% of KES is constribution of EDT and performance of membrane to reduce salt substance 99,5 %. The combination of RO and Perovskite as well as EDT has reached significant efficiency and the gas emissions is reduced to aproximatly 1,547,048 ton CO2e per year.Keywords: clean water, CO2, membrane, reverse osmosis, solar cell
Clustering Fenomena Corona Discharge berdasarkan Suara menggunakan Metode LPC dan Euclidean Distance
Authors: FIKRI MIFTAHUL , CHRISTIONO CHRISTIONO , MULYANA K. IWA GARNIWA
Published: July 2022

ABSTRAKKegagalan isolasi akibat fenomena tegangan tinggi seperti corona discharge (CD) masih banyak terjadi pada sistem kelistrikan di Indonesia. Hal ini disebabkan belum dapat dilakukannya deteksi dini kegagalan isolasi. Salah satu bentuk CD berupa suara. Sebagai langkah awal deteksi dini kegagalan isolasi diperlukan suatu penelitian yang dapat mengklaster suara CD (pada kubikal 20 kV) yang merupakan tujuan penelitian. Berdasarkan pengamatan pada elektroda jarum-batang berjarak 3 cm diperoleh breakdown terkecil pada 34,3 kV. Klasifikasi suara CD ditetapkan menjadi 3 cluster yang dimulai dari tegangan cubicle 20 kV hingga sebelum breakdown terjadi yaitu 33 kV. Clustering dilakukan menggunakan metode linear predictive coding (LPC) sebagai ekstraksi ciri dan Euclidean distance sebagai pencocokan pola hasil ekstraksi. Adapun suhu di dalam kubikal antara 27,5℃ - 35,3℃ dan kelembaban berkisar 70% - 95%. Hasil akurasi clustering rata-rata yang diperoleh adalah 100% untuk data training dan 85,15% untuk data testing.Kata kunci: corona discharge, Euclidean distance, kegagalan isolasi, linear predictive coding, tegangan tinggi ABSTRACTInsulation failures due to high voltage phenomena such as corona discharge (CD) are still common in the electricity system in Indonesia. This is because early detection of insulation failure cannot be carried out. One form of CD is sound. As the first step in early detection, a study is needed to cluster CD sound (at 20 kV cubical). By observations on the needle-rod electrode at 3 cm, the smallest breakdown was at 34.3 kV. CD sound classification is set into 3 clusters starting from a cubicle voltage of 20 kV until before breakdown occurs, which is 33 kV. Clustering was carried out using linear predictive coding (LPC) as feature extraction and Euclidean distance as pattern matching extracted results. The temperature and humidity inside the cubical are 27.5℃-35.3℃ and 70%-95% respectively. For training and testing data average clustering accuracy results obtained are 100% and 85.15% respectively.Keywords: corona discharge, Euclidean distance,, insulation failure, linier predictive coding, high voltage
Urea-Formaldehid Konsentrat Sebagai Bahan Baku Resin Urea-Formaldehid
Authors: Athariqa Dila , Oktapia Selvi Mayangsari , Dermawan Dicky
Published: July 2022

ABSTRAKPanel kayu merupakan produk yang terbuat dari bahan kayu yang direkatkan dengan menggunakan resin,Â bahan perekat yang digunakan dalam produksi kayu lapis merupakan resin urea-formaldehid (UF). Resin UFÂ adalah resin thermosetting yang terbuat dari urea dan formaldehid yang akan mengeras jika dipanaskan danÂ dapat dicetak ulang. Pada penelitian ini, pembuatan resin UF menggunakan bahan baku dari UreaÂ Formaldehyde Concentrate (UFC). Tujuan dari penelitian ini mempelajari pengaruh perubahan sifat danÂ kinerja resin UF dari UFC, pengaruh rasio molar pada tahap metilolasi dan kondensasi, dan mengujiÂ efektivitas resin UF melalui aplikasi pembuatan panel kayu dengan cara menguji Internal Bonding (IB)Â Strength dan emisi formaldehid. Berdasarkan penelitian yang telah dilakukan maka didapatkan bahwaÂ pembuatan resin UF dengan bahan baku UFC memiliki gel time yang lebih panjang sehingga menurunkan IBÂ Strength, dan free formaldehyde yang rendah sehingga emisi formaldehid akan menurun dibandingkan dengan nilai IB Strength maupun emisi formaldehid dari resin UF dari urea dan formaldehid.ABSTRACTWood panel are a product made of a wood inggriidients glued together by using resin. The main adhesive usedÂ in plywood production is urea-formaldehyde resin (UF). UF resin is a thermosetting resin made from urea andÂ formaldehyde, where this resin to be hardened if heated and reprinted. The purpose of this research is affectsÂ changes in properties and performance from UF resin made from UFC, effects of molar ratio at theÂ metylolation and condentation stage, and tests the effectiveness of UF resin with a wooden paneling applicationÂ by testing Internal Bonding (IB) Strength, and formaldehyde emission. According to this research it has beenÂ obtained that UF resin with UFC material has a lengthly gel time therefor lower IB Strength value, and lowÂ free formaldehyde so that formaldehyde emission will decreased when compared with IB Strength value asÂ well as formaldehyde emissions from UF resin with urea and formaldehyde materials.
Prediksi Perubahan Kawasan Hutan Mangrove Menggunakan Model Cellular Automata Markov pada Citra Penginderaan Jauh Landsat (Studi Kasus: Kawasan Resort Bama, Taman Nasional Baluran, Kabupaten Situbondo, Jawa Timur)
Authors: Darmawan Soni , Claudia Aprilia , Tridawati Anggun
Published: July 2022

ABSTRACTTaman Nasional Baluran merupakan taman konservasi yang mengalami degradasi mangrove. UpayaÂ restorasi mangrove perlu dilakukan untuk mendukung Peraturan Daerah pada Kabupaten Situbondo NoÂ 6 tahun 2014. Penelitian ini bertujuan untuk menghitung luasan perubahan kawasan hutan mangroveÂ setiap tahun dan pada tahun prediksi. Penelitian ini menggunakan model terintegrasi Markov Chain danCellular Automata untuk menyimulasikan perubahan penggunaan lahan periode 2000 dan 2020 dan memprediksi penggunaan lahan mangrove periode 2030. Teknologi penginderaan jauh digunakan untuk menganalis penggunaan lahan melalui citra satelit Landsat (tahun 2000, 2010, dan 2020). Hasil penelitian menunjukkan bahwa penutupan lahan mangrove mengalami penurunan sebesar 0,5% pada tahun 2000 â€“ 2010 dan mengalami peningkatan sebesar 3,5% pada tahun 2010-2020. Luasan mangrove terus mengalami peningkatan pada tahun 2020 â€“ 2030 yaitu sebesar 9,3% atau 122 Ha. Penerapan modelÂ CA-Markov dalam memprediksi penutupan lahan menunjukan nilai kstandard 0,8 yang dapat diartikan bahwa pemodelan dapat diterima secara ilmiah.Â ABSTRAKTaman Nasional Baluran is a conservation park that is experiencing mangrove degradation. MangroveÂ restoration efforts need to be carried out to support the Regional Regulation of Situbondo Regency No.Â 6 of 2014. This study aims to calculate the extent of changes in mangrove forest areas every year and inÂ the predicted year. This study used an integrated Markov Chain and Cellular Automata model toÂ simulate land use change for the period 2000 and 2020 and predict mangrove land use for the periodÂ 2030. Remote sensing technology was used to analyze land use through Landsat satellite imagery (2000,Â 2010, and 2020). The results showed that mangrove land cover decreased by 0.5% in 2000 â€“ 2010 andÂ increased by 3.5% in 2010 â€“ 2020. Mangrove area continues to increase in 2020 â€“ 2030, which is 9.3%Â or 122 Ha. The application of the CA-Markov model to predict land cover shows a standard value of 0.8Â which means that the modeling is scientifically accepted.
Life Cycle Assessment in Road Pavement Infrastructures: A Review
Authors: Gouveia Bruno Guida , Donato Marina , Da Silva Marcelino Aurélio Vieira
Published: July 2022

The need to meet society's demands for road infrastructure while minimizing the resulting environmental impacts is a source of great complications. In this context, Life Cycle Assessment (LCA) can be useful by applying a set of rules and processes for the environmental assessment of projects. The objectives of this study were to present the main environmental impact categories associated with emissions from the life cycle phases of a road pavement and how to estimate them. In addition, this paper provides examples of LCA applications on these infrastructures. In view of the evolution of research on LCA, a compilation was made on: the main categories of environmental impact associated with emissions; phases of life cycle impact assessment; and procedures and methods of impact estimation. The impact categories presented are associated with climate change, acidification, ozone depletion, tropospheric ozone formation, eutrophication, and Particulate Matter Formation. Not all methods are able to generate indicators for all types of impact and, depending on the type of materials and services that make up the inventory of the alternatives analyzed, one specific method may be more appropriate to use. The conclusions are that for each environmental impact, the results depend on the input parameters, such as energy flows and materials, along with their processing by methods of life cycle impact assessment. Besides this, despite the great diversity of the databases for the steps of life cycle assessment of roadway pavement, there is a general consensus about the nature of these steps. Doi: 10.28991/CEJ-2022-08-06-015 Full Text: PDF
Analysis of Pedestrian Performance by Integrating both Quantitative and Qualitative Factors
Authors: Meneses Neil Andrew I. , Buluran Jocelyn S.
Published: July 2022

The importance of non-motorized movements, explicitly walking, and its corresponding impact on social, economic, and environmental aspects has always been overlooked due to the convenience brought by motorized vehicles. An automobile-dependent society mirrors the rise and worsening of several transportation problems, such as road-wide traffic congestion, massive fuel consumption, and excessive CO2emissions. In response to these aggravating situations and in support of various national and international calls, the main objective of this study was to extract the significant factors influencing the pedestrian level of service and walkability and to subsequently develop a predictive mathematical model for evaluating pedestrian conditions. Factors influencing the pedestrian level of service and walkability were initially identified through an extensive review and evaluation of existing studies, literature, and other relevant resources. A cause-and-effect analysis was used to develop an Ishikawa Diagram tackling pedestrian performance. The finalized factors were incorporated into the development of the Pedestrian Performance Assessment Questionnaire (PPAQ), which was utilized for data acquisition. Survey responses were then subjected to factor analysis after satisfying several tests for assumptions and suitability to extract the root causes influencing pedestrian performance. The validated root causes were then integrated to form the Pedestrian Performance Audit Tool (PPAT), a tool used in evaluating pedestrian areas in Tarlac City, Philippines. Data was analyzed through ordinal regression analysis to develop the multi-objective pedestrian performance prediction model. Results showed that there are six critical predictors of pedestrian performance unified in the final mathematical model: Pedestrian Space (PS), Official’s Intervention (OI), Ambiance (A), Vibrance (V), Street Vendors (SV), and Trash Bins (TB), and is the most significant contribution of the study. The model's validity was ascertained through a confusion matrix, which resulted in an acceptable rating. The comparison between calculated and perceived values together with the use of odds ratios served as the basis for the interpretation of some of the key results and findings. Finally, recommendations were also presented which can be a basis for the development of sustainable programs and interventions for the improvement of the pedestrian system. Doi: 10.28991/CEJ-2022-08-06-02 Full Text: PDF
A Study on Linear Shrinkage Behavior of Peat Soil Stabilized with Eco-Processed Pozzolan (EPP)
Authors: Sulaiman Mohamad S. , Mohamad Habib M. , Suhaimi Anis A.
Published: July 2022

Peat soil incorporated materials from fragmented organic constituents that originated in submerged wetlands. Peat soil has a particular index property that accounts for more than 75% of its organic content. Due to its low shear strength, high moisture content, high compressibility, low specific gravity, restricted bearing capacity, irregular shrinkage, and instability, peat soil is interpreted as a challenging soil for the building industry. The purpose of this study is to look at the index properties of Klias, Beaufort peat soil, and eco processed pozzolan (EPP), as well as to investigate the strengthening and stiffening effects of EPP stabilization treatment on peat soil and the association between EPP and linear shrinkage effects of peat. The linear shrinkage used to measure the shrinkage behaviour of peat soil consists of untreated samples, namely peat soil, and treated samples, which are peat soil in addition to EPP with a concentration of 20% and 30%, respectively. A scanning electron microscope (SEM) is employed to produce images of a sample by scanning the surface of an untreated peat sample and treated peat samples with EPP. High moisture content with an average of 580% was reported for the KBpt area. EPP can potentially help to reduce the shrinkage by almost 66.66%. Additionally, the results showed that by adding EPP as filler material to the peat soil, shrinkage behaviour decreases significantly for untreated peat soil and treated peat soil with EPP, with 4.29% reduced to 1.43% significantly. Correspondingly, the crystallization process occurred between peat soil and EPP, which contributed to the reduction of shrinkage and tension crack in peat soil and produced Muscovite, which is appeared and identified as mineral that important in rock-forming mineral. Doi: 10.28991/CEJ-2022-08-06-05 Full Text: PDF
EVALUATION OF THE EFFICIENCY OF BUSINESS MANAGEMENT BASED ON THE DEVELOPMENT OF BALANCED INDICATORS TECHNOLOGY
Authors: Kazakova Nataliya
Published: July 2022

The article provides a comparative analysis of methods for assessing effective business management. A modified approach based on a balanced scorecard is considered. The advantage of the considered approach is the use of an integral assessment of management effectiveness, which allows a comprehensive presentation of the effectiveness of management of all its processes, taking into account the priorities of strategic development.
The Impact of External Threats on the Economic Security of Pipe Rolling Enterprises of the Russian Federation
Authors: Malyutina Tatiana
Published: July 2022

The purpose of this research is to identify the main external threats and their consequences, which need operational regulation or consistent strategic neutralization. These threats affect the economic security of pipe rolling enterprises of the Russian Federation. The scientific basis of the research is based on the materials of the modern legislation of the Russian Federation aimed to ensure the economic security of the state, the researches on this topic implemented by domestic and foreign scientists, financial and economic reports published on the official websites of pipe rolling enterprises of the Russian Federation, reference and analytical materials represented on the official websites of the Federal Customs Service, the Federal Tax Service and the Ru-Stat Information System. As a result, of the study, we have made an overview of the legislative framework of the Russian Federation aimed at the ensuring of the economic security to organize the state counteraction work to resist external challenges, threats and risks. The set of measures that are directly related to the economic security of the pipe rolling industry was proposed.
MODERN PROBLEMS OF ENSURING FOOD SECURITY OF THE RUSSIAN FEDERATION
Authors: Buravova Alena
Published: July 2022

The article discusses the current problems of food security of the Russian Federation. The influence of the policy of unfriendly states on the food security of Russia is analyzed, as well as anti-sanctions measures aimed at maintaining the economy and ensuring food security of the Russian Federation are presented. The growth rates of agricultural exports are calculated, and the dynamics of the gross harvest of the main types of agricultural crops in the whole country is presented.
TRENDS IN THE FORMATION OF A SYSTEM OF CONSUMER COOPERATIVES FOR THE PURPOSE OF PROVIDING AGRICULTURAL SERVICES AS A FACTOR OF SUSTAINABLE DEVELOPMENT OF RURAL AREAS
Authors: Gor'kova Nadezhda , Asanova Nataliya , Isachkova Lidiya
Published: July 2022

The orderly organizational structure of consumer cooperatives is aimed at improving the provision of services to the population, thereby increasing the food security of the country. At present, the provision of services by consumer agricultural cooperatives is carried out to a lesser extent than by peasant (farm) enterprises, despite the advantages of the form of labor organization of the former. The system of agricultural cooperatives needs to be improved in terms of informing legal entities and individuals interacting in the food market.
MIGRATION PROCESSES IN RUSSIA: CAUSES, FACTORS AND CONSEQUENCES
Authors: Anoshina Yuliya , Gaidarenko Larisa , Simonov Sergei
Published: July 2022

The article presents the results of a study of migration processes in the Russian Federation, summarizing the indicators of the dynamics of internal migration, average wages by federal districts, migration growth, the number of labor migrants from the CIS countries and far abroad, the number of unemployed in the Russian Federation. The necessity of state regulation of migration processes is substantiated, taking into account the interests of employment of the local population and the productive employment of migrants, and the main directions for the development of the labor market of the Russian Federation are proposed
Keragaman Hama di Pertanaman Kubis (Brassica oleracea L.) yang diperlakukan dengan Net Protection
Authors: Nurattul Awalliyah Ririn , Tarmizi  , Irwan Muthahanas
Published: July 2022

Kubis (Brassica oleracea L.) adalah komoditas sayuran bernilai ekonomi tinggi. Petani di Desa Jagaraga Indah, Kecamatan Kediri, Kabupaten Lombok Barat, Provinsi NTB telah lama membudidayakan kubis dengan pola sederhana atau tanpa net protection. Penelitian ini bertujuan untuk mengetahui pengaruh net protection terhadap populasi, indeks dominansi, dan indeks keragaman pada tanaman kubis (Brassica oleracea L.). Metode yang digunakan adalah eksperimental dengan Rancangan Acak Lengkap (RAL), dan analisis data dengan Uji T-Parsial. Hasil penelitian ditemukan 13 famili terkoleksi pada perlakuan net protection (Tephritidae, Chrysomelidae, Pyralidae, Muscidae, Plutellidae, Tenebrionidae, Acrididae, Coccinellidae, Gryllidae, Noctuidae, Dermestidae, Pentatomidae, dan Blattidae). Perlakuan tanpa net protection ditemukan 15 famili terkoleksi, 13 di antaranya sama dengan famili hama perlakuan net protection, sedangkan dua famili lainnya adalah Alydidae dan Plataspidae. Perlakuan net protection pada populasi famili serangga hama tidak berpengaruh siginifikan terhadap populasi. Sementara itu, pada indeks dominansi, dan indeks keragaman berpengaruh nyata. Indeks dominansi famili serangga hama dengan kategori tinggi di perlakuan tanpa net protection menunjukkan delapan famili termasuk kategori tinggi dan tujuh famili kategori rendah. Indeks dominansi net protection yaitu 10 famili kategori rendah, dan tiga kategori tinggi. Indeks keragaman net protection ditemukan 12 famili kategori rendah, dan satu famili kategori tinggi (Tephritidae). Pada perlakuan tanpa net protection ditemukan lima famili kategori tinggi (Tephritidae, Chrysomelidae, Pyralidae, Muscidae, dan Plutellidae), dua famili kategori sedang (Pentatomidae dan Tenebrionidae), dan delapan famili kategori rendah (Acrididae, Coccinellidae, Gryllidae, Noctuidae, Dermestidae, Plataspidae, Alydidae, dan Blattidae).
The relationship of learning and memory disfunction with NEURL1 and RGS14 genes in patients with autism spectrum disorders
Authors: ECIROGLU Hamiyet , ŞENER Elif Funda , ÖZTOP Didem Behice , ÖZMEN Sevgi , KAAN Dilek , ÖZKUL Yusuf
Published: July 2022

Aim: We aimed to evaluate the relationship between learning-memory difficulties and NEURL1 and RGS14 genes in patients with autism spectrum disorders (ASD).Method: Forty children with ASD (20 ASD, 20 high functioning autism (HFA)) and 20 healthy controls were enrolled in this study. NEURL1 and RGS14 gene expressions in blood samples of volunteers were assessed by quantitative Real-Time PCR (qRT-PCR). The clinical and demographical findings in patients were determined and examined in relation to the gene expressions.Results: According to our findings, NEURL1 gene expression was decreased in both patient groups compared to the control (p<0.05). No significant difference between the groups in terms of the RGS14 gene (p>0.05). A statistically significant correlation was found between learning and memory difficulties and RGS14 gene expression in HFA patients (p=0.045). A positive correlation was observed between NEURL1 and RGS14 gene expressions of ASD patients (p=0.032, r=0,59).Conclusion: In this study, we showed that the NEURL1 gene may affect learning and memory difficulties in ASD patients. Nonetheless, we recommend that both genes be studied with more patients and preferably with brain tissues. These genes were evaluated for the first time in a clinical study on autism, and we believe that they will contribute to the literature in this respect.
Is food insecurity a newly identified risk factor in febrile convulsion?
Authors: AYDIN Hilal , BUCAK İbrahim
Published: July 2022

Aim: Food insecurity status was evaluated in the cases diagnosed with febrile convulsions (FC) and whether food insecurity was a risk factor in FC was investigated. Materials and Methods: A questionnaire consisting of 18 questions was applied to the parents of 40 patients who were diagnosed with febrile convulsions in order to determine food insecurity (Study group). The parents of the patients who were admitted to the general pediatric outpatient clinic were included in the study as the control group. Results: A statistically significant difference was found between the groups in terms of food insecurity (p=0.019). The data obtained in the study were found to increase the febrile convulsion food security status 1.67 times and the county of residence 0.45 timesConclusion: The high rate of food insecurity in the patients diagnosed with FC indicates a new risk factor in addition to existing FC risk factors