bluuebunny/crossref_metadata_2025 huggingface dataset:
COMBINATION OF COCONUT COIR AND BENTONITE AS A BIOSORBENT FOR REMOVAL OF LEAD (Pb) IN WASTEWATER
Authors: Bako I. P. , M. Iqbal  , S. Muchtar  , Mariana
Published: June 2022

Lead is one of the industrial wastes that can be harmful to the living environment. Adsorption is one of the effective processes for the removal of lead. For this process, an adsorbent media is needed, and the preferred kinds are commonly those based on bio-materials as not only they are abundant and low-cost but also reported to have high effectivity. However, activated carbon as a stand-alone material has a low adsorption efficiency hence modification or combination with another material is needed. This research offers to explore the potential of activated carbon from coconut coir combined with activated bentonite as a hybrid adsorbent to remove lead contaminants. In this work, adsorbents were prepared in various combinations such as pure bentonite (with and without activation), coconut coir (with and without activation), and various activated bentonite-pure coconut coir. The obtained results disclose that the combined bio sorbent has a good adsorption performance in removing lead with a maximum adsorption capacity of 182.71 mg/g at an equilibrium time of 90 minutes.
MODIFICATION OF GELATIN/CARBONATED HYDROXYAPATITE MEMBRANE WITH CHITOSAN TO IMPROVE THE TENSILE STRENGTH
Authors: Mahmudi M. , Pidhatika B. , Suyanta S. , Nuryono N.
Published: June 2022

Membrane for guided tissue regeneration (GTR) is an interesting method for treating periodontitis cases. Synthesis of membranes for GTR based on gelatin and carbonated hydroxyapatite (CHA) modified by chitosan using the freezedrying method has been successfully carried out. This study aims to obtain the optimum composition between gelatin and chitosan to obtain an effective combination as a membrane base material. The membrane was synthesized using a ratio of gelatin (G) and chitosan (CH) = 1:0, 1:0.5, 1:1, 1:1.5, 1:2 and 1:2.5. The addition of chitosan to gelatin and CHA is intended to improve the physical properties of gelatin to increase membrane stability, both in dry and wet conditions. The synthesized membranes were characterized using SEM-EDX, FTIR, XRD, tensile strength test, and water absorption test. The results of the tensile strength test showed that the membrane with a ratio of G: CH = 1:1 had good mechanical strength. It was indicated by the data of the highest tensile strength compared to other compositions. The SEM-EDX characterization results show that the membrane with the composition G: CH = 1:1 had a fairly hollow surface texture. It allows it to enter the water to have adequate absorption capacity. The absorption capacity of the membrane with a composition of G: CH = 1:1 was not much different from membranes with other compositions, while XRD data showed insignificant differences in crystallinity between membrane material compositions. The FTIR spectra all showed the typical adsorption bands of gelatin and chitosan as well as the formation of hydrogen bonds and electrostatic forces between gelatin and chitosan. The composition of G: CH = 1:1 proved to be more effective as a membrane material composition with the highest tensile strength, namely 1.34 ± 0.07 MPa (dry) and 0.06 ± 0.01 MPa (wet), and an adsorption capacity of 1486 ± 109%
PHYTOCHEMICAL CONSTITUENTS AND CYTOTOXIC ACTIVITY FROM Scoparia dulcis LINN OF INDONESIA ORIGIN
Authors: Hasnawati  , S. Wahyuono  , Susidarti R. A. , D. Santosa
Published: June 2022

Scoparia dulcis Linn is a widely distributed perennial in tropical and subtropical regions, including Indonesia. Its pharmacological properties include cytotoxic, antiproliferative, antitumor, antiviral, anticancer, antibacterial, antifungal, antidiabetic, anti-inflammatory, and antioxidant activities. Therefore, the purpose of this researchis to determine the cytotoxic effects of phytochemical constituents of Scoparia dulcis Linn grown in Indonesia. In the process, 6-methoxy benzoxazole-2-(3H)-one was separated from soluble fraction ethyl acetate (FEA) of Scoparia dulcis ethanolic extract. Furthermore, extensive NMR studies were used to determine the compound structure. Thecytotoxic activities of these compounds against MCF-7 and T47D breast cancer cell lineswere also tested. The results showed that 6-methoxy benzoxazole-2-(3H)-one had no significant effect on this cancer cell. It was concluded that this compound could be developed to be another biological activity test; hence, it is used as a lead compound.
THE IDENTIFICATION OF MOLECULAR MECHANISMS FROM BIOACTIVE COMPOUNDS IN Sansevieria trifasciata PLANT AS ANTI-ALOPECIA: In-Silico APPROACH
Authors: Kasmawati Henny , Mustarichie Resmi , Halimah Eli , Ruslin  , Arfan
Published: June 2022

Alopecia is a condition characterized by excessive hair loss. This condition can be caused by various factors, such as heredity, aging, drugs, or lifestyle. This study aims to determine the affinity, stability, and pharmacokinetic profiles of several bioactive compounds from the Sansevieria trifasciata plant as anti-alopecia by applying the In-Silico method. Molecular simulation of forty-nine bioactive compounds was successfully docked to the active site of the androgen receptor (AR). The best compounds 1,2-(dipalmitoyl)-3-O-β-D-galactopyranosylglycerol, Sansevierigenin, and Spirosta-5,25(27)dien-1b,3b-diol-1-O-a-L-rhamnopyranosyl-(1,2)-a-L-arabinopyranoside showed stable results after 100 ns molecular dynamics simulation based on the root mean square deviation (RMSD) and the root mean squared fluctuation (RMSF). The binding free energy calculation using the MM-PBSA method and pharmacokinetic profiles of these three compounds showed satisfactory results compared to the minoxidil.
THE EFFECT OF CALCINATION TEMPERATURE ON SILICAALUMINA CHARACTER FROM LAPINDO MUD EXTRACT BY TEMPLATE CATFISH BONES GELATIN
Authors: R. Nuryanto  , Widodo D.S. , A. Suseno  , W. Trisunaryanti  , Triyono
Published: June 2022

Synthesis of silica-alumina mesoporous with the material based on Lapindo mud by template gelatin from catfish bones using the sol-gel method has been performed. Lapindo mud contains Al and Si as much as 48.8 and 22.6 % so can be leached. The leaching by HCl 6 M and NaOH 6M obtained dissolved Al and Si were 30,938 and 62,300 mg L1 . The gelatin from catfish bones has typed with a molecular weight of 100 kDa. The Mesoporous Si-Al showed that calcination at a temperature of 500C gave the best porosity with surface area, volume, and pore diameter of 133.076 m2g -1, 0.564 cc g-1, and 9.00 nm, respectively. The amorphous Si-Al character showed at 500C calcination, but at 600 and 700C crystals formed from alumina. TEM image showed mesoporous silica-alumina at 500C a wormhole pore was formed, while at temperatures 600 and 700C, there was a decrease in the number of pores so that the surface area of the material becomes small.
GREEN SOLVENT ENHANCED MECHANICAL EXTRACTION OF PALM KERNEL OIL
Authors: Sitepu E.K. , A. Candra  , Zaidar E.F. , A. Vika  , F. Sebayang  , Dewi F.R. , Karo-karo J.A. , Tarigan J.Br.
Published: June 2022

Even though the mechanical extraction process offers a simple and environmentally friendly process, the recovery of oil is relatively low. Thermal pretreating the oilseed increases the oil yield but produces unwanted oil color. A new method that combines grinding and extraction using green solvents was developed to extract palm kernel oil. The performance of six different green solvents such as water, ethanol, isopropyl alcohol, dimethyl carbonate, ethyl acetate, and d-limonene in the extraction of palm kernel oil was determined using a controllable blender extractor (CBE), new extraction equipment modified from a household blender appliance. Furthermore, ethyl acetate, which produced the maximum oil yield, was used to study the effect of the operating parameters of the CBE. The oil yield of 34.2% was obtained in the extraction condition of the ratio of palm kernel to ethyl acetate of 1:7, the rotational speed of 5000 rpm, and 10 minutes extraction time. Compared with other green extraction methods, the CBEintensified palm kernel oil extraction could save >70% energy consumption. In terms of extraction time, the CBEintensified could extract palm kernel oil faster than existing extraction methods.
Au-TiO2NANOSPHERES CATALYZED ONE-POT-MCR SYNTHESIS, CHARACTERIZATION AND ANTIPROLIFERATION ACTIVITY OF INDOLYL-IMIDAZOLOPYRIDINES CARBOXYLIC ACID HYBRIDS
Authors: Boda Prasad , Kumar Ega Jagadeesh , Siddoju Kavitha
Published: June 2022

In this context, we describe the efficiency of this catalyst towards green organic synthesis has been studied by carrying out a mixture of 1-fluoro-4-isocyanobenzene (1), 6-aminonicotinic acid (2)and substituted 1H-indole-3- carbaldehyde (3a-i) in distilled water, porous Au/TiO2nanospheres were added at room temperature in H2O. It proceeds yielding the corresponding isubstituted-3-((4-fluorophenyl) amino)-2-(1H-indol-3-yl)imidazo [1,2- a]pyridine-6-carboxylic acid derivative in good to excellent yield viz one-pot multi-component reaction. All the title compounds were also screened for Anti- proliferation activity screened for their in vitro anticancer activity against four human cancer cell lines MCF-7, HeLa, HEK 293T and IMR 32. Among them 4a (having 4-OCH3 substituent) has shown promising activity with IC50 (µM) 16.74±1.86 (MCF-7), 40.68 ± 1.25(HeLa), 50.61±4.64 (HEK 293T) and 26.58±1.68 (IMR32) has shown IC50 (µM) and these results are close to that of standard drug Doxorubicin.
PHASE FORMATION BEHAVIOR ON MECHANICALLY ACTIVATED ANNEALING OF Al-RICH PERITECTIC Al-Cr COMPOSITIONS
Authors: Karuna K.Y. , Joardar J. , Hariharan A.V.L.N.S.H. , Mohan Rao K. Ram
Published: June 2022

The formation of phases in the Al rich peritectic compositions of Al - Cr system was investigated under mechanical milling (MM) and subsequent annealing. MM led to the formation of nanocrystalline Al (Cr) solid solution and also caused carbon contamination originating from the organic process control agent (PCA). Al11Cr4 and AlCr2 phases were formed on annealing instead of the equilibrium peritectic compounds. Additionally, AlCr2C phase was also detected after annealing of Al-16 to 33Cr whereas Al-13Cr did not produce any intermetallic compound. The generation of the intermetallic phases was attributed to classical theories of nucleation and growth.
CAMBRIDGE STRUCTURE DATABASE ANALYSIS OF MOLECULAR INTERACTION ENERGIES IN BROMINESUBSTITUTED COUMARIN STRUCTURES
Authors: Stondus Jigmat , Kant Rajni
Published: June 2022

Although the non-covalent interactions such as hydrogen bonds and Van der Waals bonds are considered as weak but have a significant impact on the characteristics of the molecule in solution and the crystalline phase. The nature and strength of such intermolecular interactions result in various physicochemical and biological properties in crystal structures. In the present study, a quantitative analysis of intermolecular interaction in the crystal packing of some bromine substituted coumarin derivatives has been undertaken for lattice energy and intermolecular interaction energies analyses using a computational approach. The analysis shows that the energy contribution of halogen bonds such as C-Br…O and C-Br…π is quite significant in the crystal structures of bromine substituted coumarins. Besides, the C-H…O, C-H…Br and π…π interactions are also found to have a profound effect on the molecular packing of these structures. Molecular interactions with reference to the packing mechanism in each molecule are studied in detail. It is expected that empirical analysis of molecular energy interactions will help in understanding the role of various structural motifs in crystal packing
ADSORPTIVE MICELLAR FLOCCULATION AND CLOUD POINT EXTRACTION AS PRE-CONCENTRATION METHODS FOR THE DETERMINATION OF PHENOSAFRANINE DYE IN AQUEOUS SOLUTIONS
Authors: K. Arunakumari  , Shyamala P. , Ameerkhan SK. , Varma D. B. N. S.
Published: June 2022

A micellar-based preconcentration method for the extraction of Phenosafranine (PS) dye was developed by using adsorptive micellar flocculation (AMF) and cloud point extraction (CPE) techniques. In the case of AMF, aluminum sulphate (flocculant) and sodium dodecyl sulphate (SDS) were taken in 1:2 ratios for the extraction of PS dye. The parameters affecting the AMF and CPE were optimized. The calibration range and detection limits were 0.0-8.07 g/mL and 4.182 g/mL respectively for AMF. The calibration range and detection limits were 0.0-9.684 g/mL and 2.272ng/mL respectively for CPE.s The methods presented were used to extract PS dye from aqueous samples.
COMPUTATIONAL EXAMINATION OF FLAVONOID COMPOUNDS: UTILIZATION OF MOLECULAR SIMULATION TO DISCOVER DRUG CANDIDATES FOR COVID-19
Authors: Wisnumurti Rafi Firdaus , Aslanzadeh Solmaz , Parikesit Arli Aditya
Published: June 2022

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has caused the novel coronavirus disease 19 (COVID19) pandemic. Despite drugs had been deployed through intense research, none has been proven to cure the infection. Flavonoids, a natural substance, have been reported to exhibit various pharmaceutical and medical properties. The aim of this research is to discover lead compounds for covid-19 from flavonoid compounds through in silico study. Through computational examination, the potential of flavonoid compounds against SARS-CoV-2 has been examined and it shows that some flavonoids have potential against SARS-CoV-2.
POTENTIAL OF Navicula salinicola EXTRACT, A MICROALGAE FROM MALUKU ISLANDS, AS AN ANTIINFLAMMATORY AGENT USING THE HUMAN RED BLOOD CELLS (HRBC) METHOD
Authors: D. Kurnia  , Idar  , Angraeni V. J. , I. Musfiroh  , R. Hendriani  , A. Asnawi  , Z. Nurachman
Published: June 2022

Indonesia is the world's largest archipelagic state, with rich maritime biodiversity that includes microalgae. Microalgae contain various therapeutic components (i.e., anti-inflammatory) that have shown great potential to be used for human health and medicine. Navicula salinicola is a new species of microalgae discovered in the Maluku Islands marine environment in Indonesia. There have been no publications yet related to the potential content of compounds from these microalgae for anti-inflammatory purposes. The aim of this paper was to evaluate the anti-inflammatory activity of extracts of the microalgae Navicula salinicola. The Navicula salinicola was cultivated in optimum conditions after 7 days. The extraction was performed using the hierarchical maceration method with n-hexane, chloroform, and 96 percent ethanol. The extract's anti-inflammatory properties were evaluated using the Human Red Blood Cell (HRBC) stability method, and Na-diclofenac was used as a control. The results showed the n-hexane, chloroform, and ethanol extracts were able to inhibit red blood cell hemolysis with IC50 values of 154.905 ± 0.056, 80.395 ± 0.372, and 106.915 ± 0.153 %, respectively (IC50 for Na-diclofenac was 54.128 ± 0.033%). Identification of active compounds by using Thin Layer Chromatography (TLC) for the chloroform extract, the highest hemolysis inhibitory activity, showed that its containing alkaloid, phenolic, flavonoid, steroid, and terpenoid. In conclusion, the chloroform extract of Navicula salinicola had potent anti-inflammatory activity
Aşırı turizmde yerel halk – ziyaretçi etkileşimi, Foça örneği
Authors: YILDIZ Özay Emre
Published: June 2022

Aşırı turizm, hedef bölgelerin taşıma kapasitesini aşan, aşırı kalabalıklaşmaya ve çevrede bozulmaya yol açan turizm eylemini ifade etmektedir. Yaşam alanlarının işgal edildiğini hisseden yerel halkın, turizme ve ziyaretçilere karşı duyduğu rahatsızlığın açık protestolar ve düşmanca tavır biçiminde kendini gösteren toplumsal hareketlere dönüşmesi pek çok aşırı turizm durumunda görünmektedir. Bu durumlarda, olumlu bir yerel halk – ziyaretçi etkileşimi için hedef bölge yönetiminin aşırı turizmi önlemesi ya da yönetmesi gerekmektedir. Mevcut çalışma, aşırı turizm uyarıları gösteren Foça’da, yerel halk – ziyaretçi etkileşiminin incelenmesini amaçlamaktadır. Çalışmada nitel tasarım kullanılmış, veriler mülakat yöntemiyle toplanmıştır. Foça’da farklı süreler boyunca yaşayan, turizm ve diğer üretim alanlarında çalışan, işveren ve emekliler ile yapılandırılmamış mülakatlar gerçekleştirilmiş, veriler yorumlanarak yerel halkın yoğunluk dönemlerinde ziyaretçiler ve turizm ile ilgili görüş ve duyguları saptanmış, aşırı turizmin önlenmesi ve olumlu bir etkileşimin kurulabilmesi için önerilere ulaşılmaya çalışılmıştır.Çalışmanın sonucunda, Foça’da, yerel halkın yoğunluk dönemlerinde evlerinden hiç çıkmadıkları, özellikle günübirlikçilerden rahatsızlık duydukları görülmüştür. Bölgeye yönelik aşırı talep sonucu yaşam maliyeti çok artmış ve yerel halkı bölge dışına zorlamaya başlamıştır. Aşırı turizmin önlenmesi ve olumlu bir etkileşimin kurulması için öneriler arasında, yoğunluğun azaltılması için trafiğin düzenlenmesi, kalabalıkların yeni çekim alanlarına ve konaklama tesislerine dağıtılması, yerel halkın (mesleki) eğitimi, ziyaretçi yönetimi, ayrıca olumlu etkileşimi mümkün kılacak iletişim kanallarının kurulması gerekli görülmektedir. Ancak, yerel halkı karar alma sürecine dahil eden ve kapsayan, fırsat ve faydalara eşit erişim hakkı sunan bir turizm planı uzun vadeli çözüm olacaktır.
AN INVESTIGATION OF THE PROBLEMS ENCOUNTERED BY FEMALE MUSIC TEACHERS WORKING IN AFYON IN TERMS OF PROFESSIONAL VALUES
Authors: YAĞCI Safiye , TÜRKMEN Emel Funda
Published: June 2022

Today, women work in every field and constitute an important part of the productive population. A large number of female artists contribute to our music culture with their stage, education and musical productions in the field of music. Music education covers a wide area with professional, amateur and general music education dimensions. It is known that female music teachers, who take charge in all dimensions from pre-school to academic level, make very valuable contributions in this field. On the other hand, examining and arranging professional values and ethical concepts in every field where people are involved in production and consumption is of great importance in terms of carrying out the studies in a healthier way and improving the working conditions of the employees in the best way.In this study, the problems faced by female music teachers in the institutions they work at primary, secondary and high school levels were tried to be examined in terms of professional values. These problems were discussed under the headings of institution managers, colleagues, students, professional problems related to the practice of the profession, and the problems experienced by female music educators were tried to be examined by taking into account the values under these headings. The values that were ignored in the emergence of the problems experienced in the professional field in the research were created by considering the themes in the scale of "Developing the Professional Values Scale for Primary Education Teachers and Determining the Professional Values of Primary Education Teachers" developed by Nihal Tunca (2012). The values-oriented behaviors in Tunca's (2012) scale were adapted to the research and the problems that music teachers faced in their professional lives were tried to be determined according to these values. The research is important in terms of focusing on the problems of female music teachers and contributing to the determination of their problems.
Огляд можливостей онлайн-сервісу Lens
Authors: Мінтій Ірина Сергіївна , Вакалюк Тетяна Анатоліївна , Іванова Світлана Миколаївна
Published: June 2022

Під час написання дослідження велике значення від самого початку має зручність і швидкість виконання усіх процесів – від самого початку – пошуку матеріалів, їх аналізу аж до завершення певного етапу і поширення результатів. Більшість користувачів використовують для різних процесів різні сервіси – це можуть бути і звичайні пошукові системи, наукометричні бази даних, бібліотечні референс-менеджери, сповіщення, підписки та інше. Проте існують сервіси, що надають можливість виконувати усі ці дії. Наприклад, онлайн-сервіс Lens. Вітчизняні розробки щодо використання цього сервісу станом на сьогодні відсутні. В роботі розглянуто основні аспекти щодо пошуку, аналізу, упорядкування, оновлення та поширення матеріалів дослідження, використовуючи сервіс Lens. Сервіс має інтуїтивно зрозумілий інтерфейс. Lens має набагато ширші можливості, ніж це розглянуто у дослідженні, а їх розгляд є напрямом подальших досліджень.
Assessing the shear behavior of steel fiber reinforced concrete beams corroded under chloride attacks
Authors: Thao Nguyen Thi Thanh , Tung Tran Phi Son , Nhan Nguyen Duc , Tan Nguyen Ngoc
Published: June 2022

Steel corrosion affects the failure mechanism of deteriorated reinforced concrete (RC) beams. Meanwhile, there is a lack of research on the shear behavior of corroded RC beams, particularly corroded steel fiber reinforced concrete (SFRC) beams. This paper investigates the shear behavior of corroded SFRC beams with a 1.5 shear span-to-depth ratio. All beam specimens included steel fibers with 50 kg/m3. In particular, tensile longitudinal reinforcements were subjected to a corrosion degree of 16.4%, while stirrups were subjected to an approximately 24.1% corrosion degree. These results are compared to those obtained on a non-corroded beam. The obtained results from the four-point loading tests show that the corroded SFRC beams preserve a softening behavior as opposed to the sudden shear failure of RC beams without steel fibers.
Bearing capacity and failure mechanism of nonwoven geotextile reinforced clay: A verification
Authors: Nguyen Minh-Duc
Published: June 2022

The paper presents a series of laboratory tests for California Bearing Ratio (CBR) to investigate the bearing capacity and the failure mechanism of nonwoven geotextile reinforced clay. The variation of the tests included the number of reinforcement layers and compaction energy. The results indicate that the nonwoven geotextile layers improve up to 49.5% of the CBR of the reinforced clay specimens. A cross-grab stick apparatus was developed to determine the deformed shape of the embedded reinforcement layer in the reinforced specimens after CBR tests. The obtained results illustrate the membrane tension effect of the geotextile layers to enhance the bearing capacity of the reinforced soil specimens. Last, the failure mechanisms of the nonwoven geotextile reinforced specimens were verified using measurement results of maximum relative deflection in reinforcement layers.
Developing a method for estimation of plastic waste leaked into the ocean
Authors: Giang Hoang Minh
Published: June 2022

The Vietnamese Government has committed to fighting against plastic waste and reducing 75% of marine plastic debris by 2030. However, the information on the actual amount of plastic waste released into the sea in Vietnam is still uncertain. Estimates of plastic waste leaks into the ocean become essential for assessing baseline data and monitoring marine plastic litter reduction. The lack of standardised methods reliably be applied worldwide due to local conditions of the waste management system is a constraint for plastic waste management. The study developed a method for simulating plastic waste flow in solid waste management system based on material flow approach, which can estimate the amount of plastic waste mismanaged and leaked into the ocean. The estimation model was applied to Quang Ninh, a famous tourist province in Vietnam. The mismanaged plastic waste accounts for 25% of total plastic waste generation and approximately 4.5% of generated plastic waste leaking into the ocean. The results of the study also indicated the source of plastic waste leakage and possible interventions for solving the problem.
Assessing the shear behavior of corroded steel fiber reinforced concrete beams without shear reinforcement using nonlinear finite element analysis
Authors: Tan Nguyen Ngoc , Thao Nguyen Thi Thanh , Van Nguyen Tien , Hieu Du Duc
Published: June 2022

The shear behavior of steel fiber reinforced concrete (SFRC) beams has been assessed in a large number of previous studies. However, the shear strength of corroded SFRC beams without shear reinforcement is still an unresolved topic. In this paper, the finite element models of non-corroded and corroded SFRC beams have been constructed and verified regarding load-displacement curves, crack patterns, and failure modes. Finally, a parametric study also was performed to assess the effect of essential design parameters on the shear strength of SFRC beams under corrosion attacks. The results show that the reinforcement corrosion degree and concrete compressive strength are the most influencing parameters on the shear strength of SFRC beams, followed by the shear span-to-depth ratio and the steel-reinforced ratio.
Interlingual Errors in Indonesian EFL learners' Pronunciation: From Minimal Pairs to Speaking Ability
Authors: Sayogie Frans , Adbaka Muhammad Fadhli
Published: June 2022

The majority of previous research observed phonemes produced individually to examine errors. As a result, based on the concept of minimum pairings, this study offered a novel way of assessing interlingual errors based on the concept of minimal pairings. This study examines the interlingual errors in consonant minimal pairs to see the correlation between the errors and the speaking ability that happened to high school students. There are several consonants which are being used such as /v/, /θ̠/, /ð̠/, /ʃ/, /t̠ʃ/, /ʤ/, /f/, /t/, /d/, /z/, and /s/ as indicators to find the interlingual errors. This study is descriptive qualitative research that examines the interlingual errors produced by high school students when utilizing English minimal pairs of consonants. All of the consonants acted as the test tool for the 19 selected students in the form of 10 minimal pairs. The research found that students did have difficulties when they were pronouncing the consonant minimal pairs such as /d/ & /ð/, /f/ & /v/, and /ʃ/ & /t̠ʃ/. Thus, the difficulties that occurred in the students’ pronunciation also generate speaking ability between students based on the interlingual errors. The findings showed that high school students mostly struggled with their pronunciation when uttering consonants that do not exist in the Indonesian language. In conclusion, interlingual errors play an important role as a method in teaching a foreign language to see the consonant errors happen in high school students when pronouncing the English language.
Influence of the cationic composition on the optical properties and photostability of AgInS2 and AgInS2/ZnS quantum dots
Authors: Doskaliuk N. M. , Babyuk Y. V. , Tynkevych O. O. , Sachko A. V. , Khalavka Y. B.
Published: June 2022

Semiconductor I-III-VI nanocrystals are highly luminescent low toxic materials with direct band gap and tunable emission in visible and near infrared region which can be synthesized in aqueous media via simple procedure making them competitive object in compare with well developed and investigated II-VI quantum dots. However the nature of radiative recombination pathways definition and effect of synthesis conditions on spectral characteristics of the nanocrystals investigation remains an important task. In the present work influence of the cation precursors ratio as well as the heat treatment duration on the composition, optical properties and photostability of AgInS2 and AgInS2/ZnS nanocrystals synthesized in aqueous media have been investigated. Due to the low reactivity of indium salts in aqueous solution coused by formation of a stable complexes with stabilizer or hydroxycomplexes the nearest stoichiometric Ag1,1InSx quantum dots are formed at the initial [In]:[Ag] ratio 7:1. Under high excess of Ag formation of Ag2S/AgInS2 core/shell quantum dots confirming by presence of large 12-15 nm nanocrystals and red shift of the photoluminescence maximum with increasing [In]:[Ag] ratio from 1 to 3 (shell thickness should increase proportionally) is possible. With a further increase of the [In]:[Ag] ratio the absorption edge and the photoluminescence maximum are green shifted indicating increase of the quantum dots band energy. That can be explained by lowering of the valence band ceiling energy and rising of the conduction band bottom energy due to decrease of density of states of Ag 4d orbitals and increase of density of states of In 5s and 5p orbitals involved in the AgInS2 band gap formation. Increase of Indium content leads to significant increase of the photoluminescence intensity of AgInS2 nanocrystals eliminating nonradiative defects such as Agi. It have been shown that the ZnS shell epitaxial grow occurs due to the cation exchange between Zn2+ and In3+ and takes place only at low concentration of Zinc precursor ([Zn]:[Ag] ≤ 4). With further enhancement of the ratio the solid solution of AgInS2-ZnS is forming. To achieve the highest possible photoluminescence intensity and energy the AgInS2-ZnS nanocrystals should be heated at 950C at least for 120 minutes. It have been shown that the nearly stoichiometric Ag1,1InSx nanocrystals posess the highest photostability under UV light irradiation.
Study on the Importance of Physical Training for Junior Female Handball Teams from Romania
Authors: Postelnicu M.G. , Mihaila M.I.
Published: June 2022

The aim of this study is to bring to the fore the importance of physical training in the youth segment. Starting from the idea that physical training has an essential role in the training process of athletes, we conducted a sociological survey based on a questionnaire. The questionnaire was distributed written and online to a number of 56 coaches and theorists from the Physical Education faculties specializing in handball. The research methods used during this study were: the method of analyzing specialized and interdisciplinary literature, the pedagogical observation method, the survey method, the statistical-mathematical method, the graphic method, and the tabular method. The results highlighted the fact that the didactic strategies designed to plan the physical training represent a defining element in the training process of the athletes during their sports training.
ANALISIS PENENTUAN SUPPLIER KABEL AMP TERBAIK DI PT AURA TRIDAYA SEMESTA DENGAN MENGGUNAKAN METODE AHP (ANALYTICAL HIERARCHY PROCESS)
Authors: Hendriana Dadang , Addin Muhammad Fatih
Published: June 2022

Iklim persaingan dalam dunia usaha menunjukan kecenderungan yang meningkat dalam kurun waktu beberapa tahun terakhir, tidak hanya dalam skala nasional melainkan juga dalam skala internasional. Para pelaku ekonomi pada berbagai sektor usaha selalu mengupayakan pertambahan daya saing perusahaan, setidaknya dengan mempertahankan kekuatan yang telah dimiliki. Maka dari itu diperlukan strategi yang dapat meningkatkan produktifitas pada perusahaan yaitu dengan menentukan supplier terbaik kepada perusahaan. Karena supplier memegang peranan penting dalam ketersediaan bahan baku untuk berlangsungnya aktivitas produksi suatu perusahaan. Pemilihan supplier yang tepat tidak hanya menguntungkan bagi perusahaan tetapi juga meningkatkan kepuasan pelanggan.

PT Aura Tridaya Semesta dalam memenuhi kebutuhan pelanggannya dihadapkan kepada permasalahan yang berkaitan dengan pemilihan supplier berdasarkan kriteria yang dibutuhkan sehingga nantinya diharapkan pengadaan barang kabel AMP dapat terpenuhi dengan baik. Dalam proses pengadaan barang kabel AMP terdapat beberapa supplier yang telah lolos seleksi administratif dan dapat langsung melanjutkan ketahap tender. Diantara perusahaan yang telah memenuhi persyaratan administratif adalah PT Bascom Net, PT Infinity dan PT Sistech Karisma.

Untuk mengukur kinerja dari masing-masing supplier maka menggunakan pendekatan metode (Analitycal Hierarchy Process). Dalam melakukan evaluasi kinerja supplier pada prakteknya terbagi atas tiga kriteria yaitu : penentuan kriteria, sub-kriteria dan Alternatif. Setelah dihitung maka didapatkan bobot prioritas tertinggi yaitu PT Bascom Net menduduki peringkat pertama, kemudian PT Sistech Karisma diperingkat kedua dan PT Infinity diperingkat ke tiga. Evaluasi kinerja supplier harus terus dilakukan secara periodik untuk bisa menunjang keberhasilan perusahaan.
TEKNIK MOTION GRAPHICS PADA VIDEO PROFIL PRODI INFORMATIKA UNIVERSITAS MAJALENGKA
Authors: Sutrisna Nana , Bastian Ade
Published: June 2022

The rapid development of information technology has had a positive impact on the general public. Company profile is an explanation of the agency in general. It contains information, vision, and mission of an agency. Company profile has an important role for an agency because it can present the vision and mission of the agency or what it wants to offer. The company profile video is the most complete media, because the video has an element of motion, a real visualization. In addition, the benefits of this company profile video are as a presentation tool to shorten the meeting so there is no need to ask in detail about the agency's profile, vision and mission. Motion graphics is a branch of graphic design, where in motion, design elements such as shape, shape, size, direction, texture contained in it, are intentionally moved or given movement to make it look alive. It is very interesting to promote agencies with motion graphics and information and promotion media have been made in the form of a company profile video for the Informatics Study Program, Majalengka University. Which consists of 6 scenes with a video duration of 1 minute 42 seconds. As a promotional media about the Universitas Majalengka  Informatics Study Program to the general public.
PERANCANGAN MESIN PENGERING CABAI MERAH PROTOTIPE MENGGUNAKAN TUBULAR HEATER DENGAN KAPASITAS PENGERINGAN 4 KG
Authors: Asep Rachmat
Published: June 2022

So far, the drying process carried out by farmers is still simple, namely by drying it directly in the sun. This method is less effective because it will require a large area with a relatively long drying time of 10-12 days. The author will conduct research on the design and testing of a red chili drying machine using Solidwork software. The drying process used in this red chili drying machine uses a tubular heater. It is hoped that the design of this red chili drying machine can increase the production of dry red chilies. The results of the research show that the chili drying machine is designed into 2 parts that are bulkhead using a filter with dimensions of 385 x 320 mm, the dimensions of the drying room are 400 mm long, 421 mm wide, 353 mm high, in the drying room section there are 10 shelves that can be assembled and assembled. with dimensions of 400 x 380 mm for storing chilies to be dried and the dimensions of the combustion chamber having dimensions of 140 mm in length, 421 mm in width and 353 mm in height, then the tool will be made of stainless steel sheet with a thickness of 3 mm. / fan with a diameter of 170 mm which has 5 propeller blades, and the fan is rotated using an electric motor type yj62-25 with a voltage of 100-240 VAC, a frequency of 50/60 HZ and a power of 5-100W.
DETEKSI KEPITING MOLTING MENGGUNAKAN TEKNIK KLASIFIKASI MACHINE LEARNING
Authors: Rezkiawan Runal , Niswar Muhammad , Ahmad Ilham Amil
Published: June 2022

Soft crab is an export product where foreign demand is much higher than production. In the production of soft crabs, it is done by keeping the crabs individually in a crab box which is placed in the pond until they molt. Molting is a natural process of molting, i.e. removing the old tough skin for growth purposes. Shortly after molting, the new crab shells are still very soft and will harden again after water absorption occurs. Therefore it is important to monitor molting crabs to help farmers in the cultivation of soft shell crabs. The number of crab datasets is 1060 which consists of 1000 training data and 60 testing data. There are several popular image classification algorithms, namely K-Nearest Neighbors (KNN), Support Vector Machine (SVM), and Random Forest Classifier (RFC). KNN, SVM, and RFC are classification algorithms from Machine Learning. This study aims to compare the performance of the three algorithms so that the performance of the three algorithms is known. Several parameters are used to configure the KNN, SVM, and RFC algorithms. From the results of the trials conducted, KNN has the best performance with 98.33% accuracy, 98.33% precision, 98.38% recall, and 98.38% F1 Score.
PENINGKATAN NILAI KUAT TEKAN DAN PERBAIKAN RETAK-RETAK PADA BETON DENGAN MENGGUNAKAN FIBER KAWAT BENDRAT BENTUK “Z” DENGAN 3 (TIGA) VARIASI CAMPURAN
Authors: Juanita Juanita
Published: June 2022

Concrete is the main basic material used for the planning and design of widely used structures. This is because concrete has a very high compressive strength value when compared to other materials. However, concrete also has weaknesses, one of which is its brittle nature. Therefore, in this study, the use of Z-shaped bendrat wire will be carried out to increase the value of the compressive strength of concrete while improving the brittle nature of the concrete.In this study, bendrat wire fiber in the form of Z was used with a mixed variation of 0.5%, 0.75% and 1%. The number of test objects made is 12 pieces. The test was carried out when the specimen was 28 days old by using a Compression Testing Machine (CTM). From the results of the study, the average compressive strength value for normal concrete (SN) was 26.46 MPa, for Z-shaped bendrat wire fiber concrete with a mixed variation of 0.5% (SF1) the average compressive strength value was 27.27 MPa, for fiber concrete bendrat wire Z shape with a mixed variation of 0.75% (SF2) the average compressive strength value is 28.03 MPa, and for fiber concrete wire bendrat Z shape with a mixed variation of 1% (SF3) the average compressive strength value is 28.21 MPa. The more Z-shaped bendrat wire fibers added to the concrete mix, the higher the compressive strength value and the smaller the cracks that occur in the concrete.
New Students Recruitment System and Factors Influencing Their Choice: A Study at a State University in West Sumatera
Authors: Hendriani Suswati , Kasmuri Kasmuri , Susanti Reni , Putra Fitra Kasma
Published: June 2022

Recruiting new students quantitatively and qualitatively adequate to be able to get advancement and to exist is a routine agenda of a university. Thus, new student recruitment activity should be well done and well planned so that optimum results can be reached. Ideally, new student recruitment system is done by a specific permanent body whose task is to think about the best ways to get new prospective students. This can be realized when many parties are involved to get worthy suggestions. Of course each university has different methods, Therefore, this article is aimed at completing knowledge gap on new student recruitment system and factors influencing their choice of university. Through this research, new student recruitment system at IAIN Batusangkar was found out. The study used cross-sectional design. The population of the research was all the students of IAIN Batusangkar. The sample of the study was selected using cluster sampling technique in which 3.485 students were selected to be the reseach sample.   The instrument used to collect the data of the research was a closed-ended questionnaire. The collected data was analyzed through Descriptive Statistics. The results of the research showed that there was an increase of promotion effectiveness from ineffective level in 2016 (51.01%) to effective level (62.45%) in 2018. The success of the new recruitment system to recruit new students because it was carried out in various ways, ranging from the use of brochures, scholarships, to promoting the accreditation value of the study program and institution. The most dominant factors in influencing student decision in choosing a university were parents and relatively affordable tuition.
Security Management in Poland During a Crisis Situation – Formal and Practical Aspects. Indications for Ukraine
Authors: Gizicki Wojciech , Pankevych Ivan
Published: June 2022

This paper aims to analyse the processes related to security management in Poland in the case of a crisis. It is crucial to indicate the legal and organisational basis, including specific practical actions, particularly in the context of making general indications for Ukraine. Poland and Ukraine are neighbouring states with large areas and populations. However, their organisational systems, as well as internal and external conditions, are different. The paper focuses on the issue of crisis management at the level of public administration processes and tasks. The relevance of this issue is also based on the cross-border nature of opportunities and challenges in this respect.
Environmental Protection and Italian Constitutional Reform. Some Profiles of Interest and Critical Remarks
Authors: Kamińska Agnieszka Gloria
Published: June 2022

This paper aims to analyse the scope of constitutional reform no. 1/2022, approved last 8th February by the Italian Parliament, with which the Articles 9 and 41 of the Constitution have been modified. Thanks to this amendment, the environment (the ecosystem and biodiversity) has been included as a legal asset subject that needs an expressed protection. Specifically, it is possible to highlight the critical profiles concerning the balance that the legislator has already intended to offer at a regulatory level between respect for the environment and private economic activities. In this field, the Ilva case-law represents a milestone for the Constitutional Court and the Italian legislator.
The Suspension of the Limitation Period for a Tax Obligation from the Perspective of the Principle of the Citizens’ Trust in the State and Its Laws
Authors: Kobylski Piotr
Published: June 2022

This study is devoted to the issue of the suspension the limitation period for a tax obligation. Pursuant to Article 70(6)(1) of the Act of 29 August 1997, the Tax Ordinance, the course of the limitation period for a tax obligation does not begin, and, in the event it has begun, is suspended, on the day on which proceedings in a case of a fiscal offence or fiscal petty offence are initiated, of which the taxpayer has been notified, if a suspicion that the offence or petty offence has been committed is connected with failure to fulfil this obligation. It is worth considering whether this regulation is consistent with the principle of citizens’ trust in the State and its Laws, as expressed in Article 2 of the Constitution of the Republic of Poland, and consequently with Article 32(1) of the Constitution. The main research intention is to describe what impact the above-mentioned legal regulation has for determining the extent of the effect the tax regulation in question on the principle of the citizens’ trust in the State and its Laws. It should be noted that the failure to inform about the existence of a condition for suspension expressed in the analysed provision may result in the fact that, as a consequence of a misconception on the part of the taxpayer, decisions taken by him or her in connection with the disposing of property will also be incorrect.
Ontology-based Meta AutoML
Authors: Zender Alexander , Humm Bernhard G.
Published: June 2022

Automated machine learning (AutoML) supports ML engineers and data scientist by automating single tasks like model selection and hyperparameter optimization, automatically generating entire ML pipelines. This article presents a survey of 20 state-of-the-art AutoML solutions, open source and commercial. There is a wide range of functionalities, targeted user groups, support for ML libraries, and degrees of maturity. Depending on the AutoML solution, a user may be locked into one specific ML library technology or one product ecosystem. Additionally, the user might require some expertise in data science and programming for using the AutoML solution. We propose a concept called OMA-ML (Ontology-based Meta AutoML) that combines the features of existing AutoML solutions by integrating them (Meta AutoML). OMA-ML can incorporate any AutoML solution allowing various user groups to generate ML pipelines with the ML library of choice. An ontology is the information backbone of OMA-ML. OMA-ML is being implemented as an open source solution with currently third-party 7 AutoML solutions being integrated.
Contribution of Memory Tests to Early Identification of Conversion from Amnestic Mild Cognitive Impairment to Dementia
Authors: Vyhnalek Martin , Jester Dylan J. , Andel Ross , Horakova Hana , Nikolai Tomas , Laczó Jan , Matuskova Veronika , Cechova Katerina , Sheardova Katerina , Hort Jakub
Published: June 2022

Background:

Memory tests using controlled encoding and cued recall paradigm (CECR) have been shown to identify prodromal Alzheimer’s disease (AD), but information about the effectiveness of CECR compared to other memory tests in predicting clinical progression is missing.

Objective:

The aim was to examine the predictive ability of a memory test based on the CECR paradigm in comparison to other memory/non-memory tests for conversion to dementia in patients with amnestic mild cognitive impairment (aMCI).

Methods:

270 aMCI patients from the clinical-based Czech Brain Aging Study underwent a comprehensive neuropsychological assessment including the Enhanced Cued Recall test (ECR), a memory test with CECR, two verbal memory tests without controlled encoding: the Auditory Verbal Learning Test (AVLT) and Logical memory test (LM), a visuospatial memory test: the Rey-Osterrieth Complex Figure test, and cognitive testing based on the Uniform Data Set battery. The patients were followed prospectively. Conversion to dementia as a function of cognitive performance was examined using Cox proportional hazard models.

Results:

144 (53%) patients converted to dementia. Most converters (89%) developed dementia due to AD or mixed (AD and vascular) dementia. Comparing the four memory tests, the delayed recall scores on AVLT and LM best predicted conversion to dementia. Adjusted hazard ratios (HR) of immediate recall scores on ECR, AVLT, and LM were similar to the HR of categorical verbal fluency.

Conclusion:

Using the CECR memory paradigm in assessment of aMCI patients has no superiority over verbal and non-verbal memory tests without cued recall in predicting conversion to dementia.
The impact of estimated sub-national purchasing power parity on macroeconomic measures1
Authors: Costa Alex , Galletto Vittorio , Garcia Jaume , Raymond Josep Lluís , Sánchez-Serra Daniel
Published: June 2022

Due to the lack of Purchasing Power Parities (PPPs) at sub-national level, regional Gross Domestic Product (GDP) figures have been traditionally adjusted using national PPPs. The simplifying assumption that there are no regional differences in a country, and implicitly that all regions of a country have the same cost of living, might lead to regional GDP figures (adjusted for national PPPs) that are biased and might limit the design and implementation of regional policies. This paper tries to overcome this problem by estimating PPPs at sub-national level for OECD countries (TL2 regions) and EU-27 countries (NUTS2 regions) for a time series 2000–2018 through an econometric method, which uses publicly available data and is based on the Balassa-Samuelson hypothesis. This paper also presents the implications of adjusting regional macroeconomic figures with sub-national PPPs in terms of economic welfare, regional convergence and the impact on EU cohesion funds.
Наукові публікації — запорука фахового зростання судових експертів
Authors: Kliuiev O.
Published: June 2022

На сучасному етапі міжнародні відносини відіграють важливу роль у розвитку потенціалу збірника наукових праць «Теорія та практика судової експертизи і криміна- лістики», одним з основних напрямів якого є дотриман- ня європейських стандартів наукових публікацій. Збірник наукових праць «Теорія та практика судової експертизи і криміналістики» наразі перебуває на шляху вступу до між- народних наукометричних баз даних із метою поширення наукових праць авторів видання серед європейської спіль- ноти.