bluuebunny/crossref_metadata_2025 huggingface dataset:
Numerical Modelling of Mixing in a Microfluidic Droplet Using a Two-Phase Moving Frame of Reference Approach
Authors: Mbanjwa Mesuli B. , Harding Kevin , Gledhill Irvy M. A.
Published: April 2022

Droplets generated in microfluidic channels are effective self-contained micromixers and micro-reactors for use in a multiplicity of chemical synthesis and bioanalytical applications. Droplet microfluidic systems have the ability to generate multitudes of droplets with well-defined reagent volumes and narrow size distributions, providing a means for the replication of mixing within each droplet and thus the scaling of processes. Numerical modelling using computational fluid dynamics (CFD) is a useful technique for analysing and understanding the internal mixing in microfluidic droplets. We present and demonstrate a CFD method for modelling and simulating mixing between two species within a droplet travelling in straight microchannel, using a two-phase moving frame of reference approach. Finite element and level set methods were utilised to solve the equations governing the coupled physics between two-phase flow and mass transport of the chemical species. This approach had not been previously demonstrated for the problem of mixing in droplet microfluidics and requires less computational resources compared to the conventional fixed frame of reference approach. The key conclusions of this work are: (1) a limitation of this method exists for flow conditions where the droplet mobility approaches unity, due to the moving wall boundary condition, which results in an untenable solution under those conditions; (2) the efficiency of the mixing declines as the length of the droplet or plug increases; (3) the initial orientation of the droplet influences the mixing and the transverse orientation provides better mixing performance than the axial orientation and; (4) the recirculation inside the droplet depends on the superficial velocity and the viscosity ratio.
Advances and Challenges in Heavy-Metal-Free InP Quantum Dot Light-Emitting Diodes
Authors: Jiang Xiaojie , Fan Zhen , Luo Li , Wang Lishuang
Published: April 2022

Light-emitting diodes based on colloidal quantum dots (QLEDs) show a good prospect in commercial application due to their narrow spectral linewidths, wide color range, excellent luminance efficiency, and long operating lifetime. However, the toxicity of heavy-metal elements, such as Cd-based QLEDs or Pb-based perovskite QLEDs, with excellent performance, will inevitably pose a serious threat to people’s health and the environment. Among heavy-metal-free materials, InP quantum dots (QDs) have been paid special attention, because of their wide emission, which can, in principle, be tuned throughout the whole visible and near-infrared range by changing their size, and InP QDs are generally regarded as one of the most promising materials for heavy-metal-free QLEDs for the next generation displays and solid-state lighting. In this review, the great progress of QLEDs, based on the fundamental structure and photophysical properties of InP QDs, is illustrated systematically. In addition, the remarkable achievements of QLEDs, based on their modification of materials, such as ligands exchange of InP QDs, and the optimization of the charge transport layer, are summarized. Finally, an outlook is shown about the challenge faced by QLED, as well as possible pathway to enhancing the device performance. This review provides an overview of the recent developments of InP QLED applications and outlines the challenges for achieving the high-performance devices.
Experimental Investigation of Grinding Force and Material Removal Mechanism of Laser-Structured Zirconia Ceramics
Authors: Pang Jingzhu , Ji Xia , Niu Yan , Chen Shaojun
Published: April 2022

Zirconia is a high demanded structural ceramic with desirable mechanical, thermal, and chemical properties. Poor surface integrity and limited material removal rate caused by high cutting force and wheel wear are the main problems in ceramic grinding. In order to reduce the grinding force and enhance the removal rate in grinding, zirconia ceramics are firstly ablated by laser and then be grinded. A nanosecond laser is used to ablate the surface of zirconia ceramic, the laser-ablated structures with micro pits and thermal microcracks are generated. With the input of subsequent grinding, the machinability of zirconia ceramic workpiece with laser-ablated structures changes. Grinding experiments are conducted to study the grinding force and the material remove of laser-structured zirconia ceramic. Results show that the grinding forces in tangential and normal direction are significantly reduced. Compared to the grinding surface without laser-structured, a damage-free grinding surface is obtained by laser assistance.
Antenna Current Calculation Based on Equivalent Transmission Line Model
Authors: Wei Shusheng , Wen Wusong
Published: April 2022

This paper provides a new way for spatial current/field profiles for frequency-selective surface analytical approximation. It confirms that the per unit length radiation resistance of an equivalent transmission line model for line antenna has little influence on the normalized current distribution. The two-wire equivalent transmission line model (typically used for transmitting line antenna) is applied to the receiving line antenna. In this case, the corresponding incident field is decomposed into odd and even mode for asymmetric distribution. A one-wire equivalent transmission line model is then introduced for any antenna composed of relative narrow strips. The incident field does not need to be decomposed. According to the simulation, the transmission line loss has little influence on the current distribution.
Development Law of Water-Conducting Fracture Zone in the Fully Mechanized Caving Face of Gob-Side Entry Driving: A Case Study
Authors: Tan Yi , Xu Han , Yan Weitao , Guo Wenbing , Sun Qi , Yin Dawei , Zhang Yujiang , Zhang Xiaoqiang , Jing Xiaofei , Li Xiaoshuang , Wei Sijiang , Liu Xiao
Published: April 2022

This study is aimed at exploring the influence of narrow coal pillars in gob-side entry driving (GSED) on the development height of the water-conducting fracture zone (WCFZ) in the fully mechanized caving face. In reference to the geological mining conditions of working face 11915 of Gequan (GQ) Coal Mine, the development law of the WCFZ in the GSED fully mechanized caving face was studied by means of formula calculation, on-site measurement, theoretical analysis, and simulation. The research results disclose that the development height of the WCFZ in the GSED fully mechanized caving face is affected by narrow coal pillars of GSED. When the narrow coal pillars lose stability, the overburden failure changes from insufficient mining to sufficient mining, and the WCFZ in the overburden changes from an arch-shaped one to a saddle-shaped one. Additionally, the development height of the WCFZ surges.
Investigating the Shallow to Mid-Depth (>100–300 °C) Continental Crust Evolution with (U-Th)/He Thermochronology: A Review
Authors: Gautheron Cécile , Hueck Mathias , Ternois Sébastien , Heller Beatrix , Schwartz Stéphane , Sarda Philippe , Tassan-Got Laurent
Published: April 2022

Quantifying geological processes has greatly benefited from the development and use of thermochronometric methods over the last fifty years. Among them is the (U-Th)/He dating method, which is based on the production and retention, within a crystal structure, of radiogenic 4He atoms associated with the alpha decay of U, Th and Sm nuclei. While apatite has been the main target of (U-Th)/He studies focusing on exhumation and burial processes in the upper levels of the continental crust (~50–120 °C), the development of (U-Th)/He methods for typical phases of igneous and metamorphic rocks (e.g., zircon and titanite) or mafic and ultramafic rocks (e.g., magnetite) over the last two decades has opened up a myriad of geological applications at higher temperatures (>100–300 °C). Thanks to the understanding of the role of radiation damage in He diffusion and retention for U-Th-poor and rich mineral phases, the application of (U-Th)/He thermochronometry to exhumation processes and continental evolution through deep time is now mainstream. This contribution reviews the (U-Th)/He thermochronometer principle and the influence of radiation damage in modifying the diffusion behavior. It presents applications of (U-Th)/He dating to problems in tectonic and surface processes at shallow to middle crustal depths (>100–300 °C). New and promising applications using a combination of methods will stimulate a research avenue in the future.
Geotechnical Issues in Decommissioning Surface Lignite Mines—The Case of Amyntaion Mine in Greece
Authors: Kavvadas Michael , Roumpos Christos , Servou Aikaterini , Paraskevis Nikolaos
Published: April 2022

Recent changes in the fossil-fuel energy sector require coal mining industries to plan for the future, including developing procedures for decommissioning and closure associated with mines. In surface coal mining, the geotechnical issues of decommissioning include the long-term stability of the pit slopes, particularly as the pit is gradually filled with water. This paper investigates such slope stability issues, with emphasis on the conditions prevailing in the Amyntaion surface lignite mine, in Western Macedonia, Greece. Analytical and numerical methods have been developed and used to estimate the temporal evolution of the overall safety factor, as the water level in the pit rises, creating a lake. It is shown that until the water level in the lake reaches a critical depth of approximately 15–35% of the final equilibrium condition, the safety factor against the overall slope instability decreases slightly (by about 3% in the case study, and up to 5–10% in other conditions) compared to its value at the end of exploitation. At higher lake levels, the safety factor increases significantly, as the beneficial effect of the lake water pressure acting on the slope overcomes the adverse effect of pore water pressure rise inside the slope. In typical mines, the critical water depth is achieved within a few years, since the surface area of the pit is smaller at deeper levels; thus, more favorable slope stability conditions are usually reinstated a few years after mine closure, while the small reduction in safety during the initial stages after closure is inconsequential. The paper investigates the parameters influencing the magnitude of the small reduction in the short-term safety factor and produces normalized graphs of the evolution of the safety factor as the lake water level rises. The results of the analyses can be used in preliminary closure studies of surface coal mines.
Abscisic Acid—Defensive Player in Flax Response to Fusarium culmorum Infection
Authors: Boba Aleksandra , Kostyn Kamil , Kochneva Yelyzaveta , Wojtasik Wioleta , Mierziak Justyna , Prescha Anna , Augustyniak Beata , Grajzer Magdalena , Szopa Jan , Kulma Anna
Published: April 2022

Fusarium culmorum is a ubiquitous soil pathogen with a wide host range. In flax (Linum ussitatissimum), it causes foot and root rot and accumulation of mycotoxins in flax products. Fungal infections lead to huge losses in the flax industry. Moreover, due to mycotoxin accumulation, flax products constitute a potential threat to the consumers. We discovered that the defense against this pathogen in flax is based on early oxidative burst among others. In flax plants infected with F. culmorum, the most affected genes are connected with ROS production and processing, callose synthesis and ABA production. We hypothesize that ABA triggers defense mechanism in flax and is a significant player in a successful response to infection.
An Insight into the Medicinal Chemistry Perspective of Macrocyclic Derivatives with Antitumor Activity: A Systematic Review
Authors: Liang Yan , Fang Ru , Rao Qiu
Published: April 2022

The profound pharmacological properties of macrocyclic compounds have led to their development as drugs. In conformationally pre-organized ring structures, the multiple functions and stereochemical complexity provided by the macrocycle result in high affinity and selectivity of protein targets while maintaining sufficient bioavailability to reach intracellular locations. Therefore, the construction of macrocycles is an ideal choice to solve the problem of “undruggable” targets. Inspection of 68 macrocyclic drugs on the market showed that 10 of them were used to treat cancer, but this structural class still has been poorly explored within drug discovery. This perspective considers the macrocyclic compounds used for anti-tumor with different targets, their advantages and disadvantages, and the various synthetic methods of them.
Covalently Immobilizable Tris(Pyridino)-Crown Ether for Separation of Amines Based on Their Degree of Substitution
Authors: Vezse Panna , Benda Bianka , Fekete András , Golcs Ádám , Tóth Tünde , Huszthy Péter
Published: April 2022

A great number of biologically active compounds contain at least one amine function. Appropriate selectivity can only be accomplished in a few cases upon the substitution of these groups, thus functionalization of amines generally results in a mixture of them. The separation of these derivatives with very similar characteristics can only be performed on a preparative scale or by applying pre-optimized HPLC methods. A tris(pyridino)-crown ether was designed and synthetized for overcoming these limitations at a molecular level. It is demonstrated, that this selector molecule is able to distinguish protonated primary, secondary and tertiary amines by the formation of reversible complexes with different stabilities. This degree of substitution-specific molecular recognition of amines opens the door to develop separation processes primarily focusing on the purification of biologically active compounds in a nanomolar scale.
Design, Synthesis and Biological Evaluation of N-phenylindole Derivatives as Pks13 Inhibitors againstMycobacterium tuberculosis
Authors: Cai Yanpeng , Zhang Wei , Lun Shichun , Zhu Tongtong , Xu Weijun , Yang Fan , Tang Jie , Bishai William R. , Yu Lifang
Published: April 2022

Polyketide synthase 13 (Pks13), an essential enzyme for the survival of Mycobacterium tuberculosis (Mtb), is an attractive target for new anti-TB agents. In our previous work, we have identified 2-phenylindole derivatives against Mtb. The crystallography studies demonstrated that the two-position phenol was solvent-exposed in the Pks13-TE crystal structure and a crucial hydrogen bond was lost while introducing bulkier hydrophobic groups at indole N moieties. Thirty-six N-phenylindole derivatives were synthesized and evaluated for antitubercular activity using a structure-guided approach. The structure–activity relationship (SAR) studies resulted in the discovery of the potent Compounds 45 and 58 against Mtb H37Rv, with an MIC value of 0.0625 μg/mL and 0.125 μg/mL, respectively. The thermal stability analysis showed that they bind with high affinity to the Pks13-TE domain. Preliminary ADME evaluation showed that Compound 58 displayed modest human microsomal stability. This report further validates that targeting Pks13 is a valid strategy for the inhibition of Mtb and provides a novel scaffold for developing leading anti-TB compounds.
Formulation, Characterization and Permeability Studies of Fenugreek (Trigonella foenum-graecum) Containing Self-Emulsifying Drug Delivery System (SEDDS)
Authors: Sinka Dávid , Doma Enikő , Szendi Nóra , Páll Jázmin , Kósa Dóra , Pető Ágota , Fehér Pálma , Ujhelyi Zoltán , Fenyvesi Ferenc , Váradi Judit , Vecsernyés Miklós , Szűcs Zsolt , Gonda Sándor , Cziáky Zoltán , Kiss-Szikszai Attila , Vasas Gábor , Bácskay Ildikó
Published: April 2022

Fenugreek is used as a spice and a traditional herbal medicine for a variety of purposes, given its antidiabetic and antioxidant effects. Self-emulsifying drug delivery systems (SEDDS) of herbal drugs are targets of extensive research aiming to increase bioavailability and stability. The study’s objective was to formulate SEDDS containing Trigonella foenum-graecum extract to improve the stability of herbal extract and to increase their permeability through a Caco-2 monolayer. A characterized fenugreek dry extract was used for the formulations, while the SEDDS properties were examined by particle size analysis and zeta potential measurements. Permeability assays were carried out on Caco-2 cell monolayers, the integrity of which was monitored by follow-up trans-epithelial electric resistance measurements (TEER). Cytocompatibility was tested by the MTT method, and an indirect dissolution test was performed, using DPPH antioxidant reagent. Two different SEDDS compositions were formulated from a standardized fenugreek dry extract at either the micro- or the nanoemulsion scale with sufficient stability, enhanced bioavailability of the compounds, and sustained release from HPMC capsules. Based on our results, a modern, non-toxic, cytocompatible fenugreek SEDDS formulation with high antioxidant capacity was developed in order to improve the permeability and bioavailability of all components.
An Enactivist Account of Mind Reading in Natural Language Understanding
Authors: Wallis Peter
Published: April 2022

In this paper we apply our understanding of the radical enactivist agenda to the classic AI-hard problem of Natural Language Understanding. When Turing devised his famous test the assumption was that a computer could use language and the challenge would be to mimic human intelligence. It turned out playing chess and formal logic were easy compared to understanding what people say. The techniques of good old-fashioned AI (GOFAI) assume symbolic representation is the core of reasoning and by that paradigm human communication consists of transferring representations from one mind to another. However, one finds that representations appear in another’s mind without appearing in the intermediary language. People communicate by mind reading it seems. Systems with speech interfaces such as Alexa and Siri are of course common, but they are limited. Rather than adding mind reading skills, we introduced a “cheat” that enabled our systems to fake it. The cheat is simple and only slightly interesting to computer scientists and not at all interesting to philosophers. However, reading about the enactivist idea that we “directly perceive” the intentions of others, our cheat took on a new light and in this paper we look again at how natural language understanding might actually work between humans.
Significance of Dust Particles, Nanoparticles Radius, Coriolis and Lorentz Forces: The Case of Maxwell Dusty Fluid
Authors: Wei Yanming , Rehman Saif Ur , Fatima Nageen , Ali Bagh , Ali Liaqat , Chung Jae Dong , Shah Nehad Ali
Published: April 2022

This study aimed to analyze the momentum and thermal transport of a rotating dusty Maxwell nanofluid flow on a magnetohydrodynamic Darcy–Forchheimer porous medium with conducting dust particles. Nanouids are the most important source of effective heat source, having many applications in scientific and technological processes. The dust nanoparticles with superior thermal characteristics offer a wide range of uses in chemical and mechanical engineering eras and modern technology. In addition, nanofluid Cu-water is used as the heat-carrying fluid. The governing equations for the two phases model are partial differential equations later transmuted into ordinary ones via similarity transforms. An efficient code for the Runge–Kutta technique with a shooting tool is constructed in MATLAB script to obtain numeric results. The study is compared to previously published work and determined to be perfect. It is observed that the rising strength of the rotating and magnetic parameters cause to recede the x- and y-axis velocities in the two phase fluid, but the temperature function exhibits an opposite trend. By improving the diameter of nanoparticles Dm, the axial velocity improves while transverse velocity and temperature show the opposite behaviors. Furthermore, it is reported that the inclusion of dust particles or nanoparticles both cause to decline the primary and secondary velocities of fluid, and also dust particles decrease the temperature.
Nursing Students’ Experiences in Consecutive Clinical Interprofessional Education in Japan: Application of the IPE in Nursing Colleges
Authors: Shida Junko , Otsuka Mariko
Published: April 2022

Aim: To document nursing students’ experiences of continuous participation in a clinical interprofessional education (IPE) program with the Faculty of Pharmacy of other universities in Japan, which had been incorporated into the existing practicum program, and consider how to develop a one-shot clinical IPE program. Methods: The study participants were two nursing students from a single-department college; they were participating in a clinical IPE program—the first IPE program they had ever participated in—during an area-based practicum in Year 3. Subsequently, in Year 4, a semi-structured interview was conducted, and these interview data were qualitatively and inductively analyzed. Results: Seven categories were identified, and it was found that through continuous participation in the IPE program, there was a change from “clinical IPE is stuck at the back of their mind as a bitter experience” to “the process of clinical IPE stimulates their maturity as a nursing student” and “cultivates attitudes necessary for cooperation”. Conclusion: Consecutive years of continuous clinical IPE helps students deepen their understanding of learning content by reducing the physical and mental burden of multidisciplinary cooperation and collaboration. For difficulties with regard to step-by-step IPE, it is suggested that one-shot clinical IPE can be conducted for the upper grades along with continuous reflection activities for teams and individuals.
Studying the Effect of Perforation Parameters on Vertical Well Performance
Authors: Mohammed Haider , Khazal Emad , Sultan Hussein
Published: April 2022

This paper presents a pressure drop analysis in perforated vertical wellbores for different perforation parameters. The effect of the density of the perforations (number of perforation), the phase angle of the perforations, the diameter of the perforation and the flow rate of the crude oil from the perforations on the pressure drop and the productivity index of the perforated vertical wellbores were studied. The analysis of the vertical wellbore was performed numerically using ANSYS FLUENT 15.0 software. Three dimensional, steady-states, turbulent and incompressible fluid flow is assumed during the numerical solution of the governing equations. The results of this study show that, increased perforation density of the perforated vertical wellbore caused an increase in pressure drop, and also, decreased productivity index due to increasing the friction losses. Friction pressure drop has a significant effect on crude oil flow into the wellbore. When the main velocity is 1.5 m/s and the inlet velocity from the perforations is 2 m/s, the friction pressure drop is about 66 % and the acceleration pressure is approximately 34 % of the total pressure drop.
La motivación en el contexto de las estrategias GTD para el aprendizaje por competencias
Authors: Quesada Llanto Julio , Canta Honores Jorge Luis
Published: April 2022

La motivación es la decisión que la gente hace para lograr o evitar unos experiencias u objetivos. Del mismo modo, la educación basada en competencias se centra en las necesidades, estilos de aprendizaje y potencialidades individuales para que el estudiante alcance las destrezas necesarias para desempeñarse en el ambiente de trabajo. Por lo cual, el objeto del presente estudio es determinar la influencia de la motivación usando las estrategias GTD, para mejorar los procesos de aprendizaje por competencias de los estudiantes del VI ciclo de ingeniería Civil, de la modalidad andragógico de Working Adult de la universidad Privada del Norte, de la ciudad de Lima. La investigación es cuantitativa, de diseño no experimental, con un tipo correlacional. Para finalizar se obtiene que la Motivación influye directamente en los procesos de aprendizaje por competencias, así como a sus dimensiones que son los cognitivos, actitudinales y por procedimientos.
Mobile Robotic Platform for Contactless Vital Sign Monitoring
Authors: Huang Hen-Wei , Chen Jack , Chai Peter R. , Ehmke Claas , Rupp Philipp , Dadabhoy Farah Z. , Feng Annie , Li Canchen , Thomas Akhil J. , da Silva Marco , Boyer Edward W. , Traverso Giovanni
Published: April 2022

The COVID-19 pandemic has accelerated methods to facilitate contactless evaluation of patients in hospital settings. By minimizing in-person contact with individuals who may have COVID-19, healthcare workers can prevent disease transmission and conserve personal protective equipment. Obtaining vital signs is a ubiquitous task that is commonly done in person by healthcare workers. To eliminate the need for in-person contact for vital sign measurement in the hospital setting, we developed Dr. Spot, a mobile quadruped robotic system. The system includes IR and RGB cameras for vital sign monitoring and a tablet computer for face-to-face medical interviewing. Dr. Spot is teleoperated by trained clinical staff to simultaneously measure the skin temperature, respiratory rate, and heart rate while maintaining social distancing from patients and without removing their mask. To enable accurate, contactless measurements on a mobile system without a static black body as reference, we propose novel methods for skin temperature compensation and respiratory rate measurement at various distances between the subject and the cameras, up to 5 m. Without compensation, the skin temperature MAE is 1.3°C. Using the proposed compensation method, the skin temperature MAE is reduced to 0.3°C. The respiratory rate method can provide continuous monitoring with a MAE of 1.6 BPM in 30 s or rapid screening with a MAE of 2.1 BPM in 10 s. For the heart rate estimation, our system is able to achieve a MAE less than 8 BPM in 10 s measured in arbitrary indoor light conditions at any distance below 2 m.
Experimental Quantum Advantage with Quantum Coupon Collector
Authors: Zhou Min-Gang , Cao Xiao-Yu , Lu Yu-Shuo , Wang Yang , Bao Yu , Jia Zhao-Ying , Fu Yao , Yin Hua-Lei , Chen Zeng-Bing
Published: April 2022

An increasing number of communication and computational schemes with quantum advantages have recently been proposed, which implies that quantum technology has fertile application prospects. However, demonstrating these schemes experimentally continues to be a central challenge because of the difficulty in preparing high-dimensional states or highly entangled states. In this study, we introduce and analyze a quantum coupon collector protocol by employing coherent states and simple linear optical elements, which was successfully demonstrated using realistic experimental equipment. We showed that our protocol can significantly reduce the number of samples needed to learn a specific set compared with the classical limit of the coupon collector problem. We also discuss the potential values and expansions of the quantum coupon collector by constructing a quantum blind box game. The information transmitted by the proposed game also broke the classical limit. These results strongly prove the advantages of quantum mechanics in machine learning and communication complexity.
Lost and Newly Acquired “Ariadne”
Authors: Остроумова Наталия Викторовна
Published: April 2022

Статья посвящена опере «Прекрасная и верная Ариадна» Иоганна Георга Конради, поставленной на сцене Гамбургского театра в 1692 году. Излагается история ее партитуры, приводятся краткие сведения о композиторе. Далее рассматриваются драматургия оперы, музыкальные характеристики главных персонажей, описываются жанровые и структурные особенности арий и других вокальных номеров. В результате осуществленного анализа отмечаются французские и итальянские влияния в музыке сочинения. Итальянские влияния проявляются в формах вокальных номеров и в характеристиках главных действующих лиц. В ярком французском стиле написаны увертюра к опере, а также чакона и пассакалья; последние заимствуют свой музыкальный материал из сочинений французских композиторов. Некоторые комические эпизоды (песни Памфилия, хор точильщиков) проникнуты народным колоритом и предвосхищают вокальные номера из немецких зингшпилей XVIII века.

The article is devoted to the opera “Die schone und getreue Ariadne” by Johann Georg Conradi staged in Hamburg in 1692. The story of the discovery of its score is outlined, and brief information about the composer is given. Further, the dramaturgy of the opera and musical characteristics of the main characters are considered, genre and structural features of arias and other vocal numbers are described. As a result of the analysis, French and Italian influences on the music are indicated. Italian influences are evident in the forms of the vocal numbers and in the characteristics of the main characters. The overture to the opera, as well as the chaconne and passacaglia, are written in a true French style; the latter borrow their material from the works by French composers. Some comic episodes (the songs of Pamphilius, the choir of grinders) are imbued with folk flavor and anticipate the vocal numbers from the German Singspiel of the 18 century.
Notation of an Experimental Phonogram as an Approximation Problem
Authors: Харуто Александр Витальевич
Published: April 2022

Современные компьютерные технологии позволяют выполнять звуковысотную расшифровку фонограммы, то есть определять высоту звука в последовательные моменты времени, сохранять эти результаты в памяти компьютера и обрабатывать их. В результате анализа желательно получить нотировку фонограммы, то есть знаковую запись мелодии в какой-либо звуковысотной системе. Нотировка чаще всего выполняется в европейской 12-полутоновой равномерно-темперированной системе. Однако в традиционных музыкальных культурах используются звукоряды с разным числом и расположением ступеней в октаве, и более адекватным может оказаться запись с применением собственного звукоряда исполнителя, как правило, неизвестного исследователю заранее. В качестве отображающего звукоряда, используемого в нотировке, может использоваться как равномерно-темперированный ряд с тем или иным числом ступеней в октаве, так и собственный звукоряд исполнителя. Замена исходной фонограммы последовательностью тонов отображающего звукоряда всегда сопровождается погрешностью аппроксимации, которая может быть вычислена с применением компьютерных методов. В данной работе предлагается использовать погрешность аппроксимации как универсальный критерий качества подбора отображающего звукоряда для записи мелодии как последовательности тонов. В оценке учитываются и погрешности фиксации параметров расположения тона на оси времени. Реализация всех необходимых в компьютерном исследовании процедур осуществляется в программе автора SPAX для Windows.

Modern computer technologies provide melody description of a phonogram, i.e., estimation of sound pitch at sequentiaL time moments, storing of resuLts in computer memory and its anaLysis. The wanted finaL resuLt is notation of meLody, i.e., a sequence of signs which corresponds with any sound pitch system and represents the meLody. UsuaLLy, notation wiLL be made on the base of “European” equaL-tempered pitch row with 12 stages. But in traditionaL musicaL cuLtures, different sound pitch rows wiLL be used, with various numbers of stages and intervaLs between them. As a ruLe, these rows are unknown to researcher, and it may be evaLuated as one of resuLts of investigation. The approximating pitch row used in notation can be equaL-tempered with some number of stages or a pitch row native to performer. Every sound pitch system can describe a meLody with approximation errors. These errors can be caLcuLated with heLp of computer program. In this articLe, a universaL approach for estimation of approximation errors wiLL be used, based on caLcuLating of mean-square error of notation which represents the meLody as a set of tones. The inaccuracy of fixation of tones onto time axis wiLL be aLso caLcuLated. ALL the needed caLcuLations for these tasks wiLL be made with heLp of author's computer program SPAX for Windows.
Penerapan Metode Peramalan dalam Menyusun anggaran Penjualan dan Anggaran Produksi Sebagai Dasar Penyusunan Anggaran Biaya Produksi pada LAF Project
Authors: Septianti Raisya Putri , Dahtiah Neneng
Published: April 2022

This research was carried out in the LAF project, which is an MSME dedicated to production and commerce, to understand the application of sales forecasts in preparing sales budgets and production budgets, as the basis for preparing production cost budgets, because the company did not prepare The sales budget is counted, and no sales budget is established. production budget and production cost budget.  The type of research used is a descriptive method with quantitative methods. The data type is qualitative data and quantitative data, used for data sources, that is, raw data and auxiliary data obtained through interviews, observations, and records. According to the research results, the secondary method is the most suitable method for the company, and the SKP value is 48.18.  The prepared sales budget resulted in a sales plan of 5,371 pieces or Rp. 1,068,847,836 a year. The production budget was prepared using the inventory stability method of 5,371 units.  Therefore, the company needs a production cost budget of Rp. From June 2021 to May 2022, it is 1,014,602,825.
Perhitungan Break Even Point (BEP) dan Margin of Safety (MOS) Sebagai Alat Perencanaan Laba
Authors: Liestiana Thania Putri , Novianty Ira
Published: April 2022

This research was conducted on UMKM Makroni NR Ciamis who have not done a good profit planning. The purpose of this study was to find out how profit planning was carried out, the number of Break Even Points (BEP) and Margin of Safety (MOS) at UMKM Makroni NR Ciamis. The research method applied is descriptive method with a quantitative approach. The types of data used are qualitative data and quantitative data with the data sources being primary data and secondary data. Data collection techniques used are interviews and documentation. The steps taken are to classify costs into fixed costs and variable costs, calculate contribution margin, BEP, target sales volume and MOS. Based on the calculation, the BEP generated is Rp. 5,466,406 and the resulting MOS is 94.33%. The results of this study are expected to help companies in carrying out optimal profit planning through the calculation of BEP and MOS.
Pengaruh Economic Value Added (EVA) Dan Market Value Added (MVA) Terhadap Return Saham
Authors: S. Raja Jefry Erwin Yoshua , Muhammad Rahma Nazila
Published: April 2022

The purpose of this study was to determine the effect of EVA and MVA on stock returns. The population used the Consumer Goods Industry sector companies listed on Bursa Efek Indonesia in 2018-2020. Sample selection used purposive sampling method using certain criteria. In analysing the research data used multiple linear regression analysis techniques. Based on the results it was found that partially with the t-test EVA had a significant on stock returns, while MVA had no significant on stock returns. Simultaneously with the F-test, EVA and MVA have a significant effect on stock returns.
Pengaruh Audit Tenure, Kualitas Laba Dan Auditor Spesialisasi Industri Terhadap Audit Delay
Authors: Cyntia Aurely  , Rina Destiana  , Kamalah Saadah
Published: April 2022

Audit delay is the time span between the closing date of the financial statements until the date of the independent audited financial report signed by an independent auditor. This research was aimed to examine empirically the effect of audit tenure, earnings quality and auditor industry specialization as independent variables on audit delay as the dependent variable. The data used in this research are financial reports on manufacturing companies in the property, real estate and building construction sectors listed on the Indonesia Stock Exchange in the 2018-2020 period. The selection of this sample using purposive sampling method and then obtained 81 samples of observations. The data analysis method used multiple linear regression analysis. Hypothesis testing on the t statistical test showed that audit tenure had no effect on audit delay, while earnings quality had a positive effect on audit delay, but auditor industry specialization had a negative effect on audit delay.
Penyusunan Laporan Keuangan Berdasarkan ISAK 35 dengan Menggunakan Microsoft Excel 2016 pada LKSA Bina Yatim
Authors: Fitriani Annisa , Afriady Arif
Published: April 2022

Orphanage or LKSA (Institute for Child Social Welfare) is a form of non-profit oriented that earns income from government grants or donations from the public who do not expect compensation for what has been given. LKSA's responsibility for these contributions needs to be transparent and reported regularly in the form of financial statements to avoid misuse of funds and to increase the credibility of LKSA to external parties. Currently, the standard for preparing financial statements that applies to non-profit oriented entities is ISAK 35. However, there are still LKSA that have not implemented this standard. One of them is LKSA Bina Yatim. This study aims to determine how the preparation of financial statements has been carried out, to design financial report formats with Microsoft Excel and compose it based on ISAK 35, and to find out the implications of applying these design and preparation to LKSA Bina Yatim. The research method used descriptive qualitative method. The research data was obtained through interviews, documentation, and literature study. The results of this study indicate that LKSA Bina Yatim is still manual in recording and preparing its financial statements and only prepare a simple income statement that does not follow the standard. Therefore, the authors designed the format for preparing financial statements using Microsoft Excel to assist LKSAs in preparing financial reports based on ISAK 35 in May 2021. The implications of this design and preparation can help LKSA in preparing financial statements effectively and efficiently.
Analisis Perhitungan Titik Impas Produk Susu Murni, Yoghurt, dan Keju Mozzarella
Authors: Heryanto Hanifa Khoirunnisaa , Gunawan Arwan
Published: April 2022

Micro, Small and Medium Enterprises (MSMEs) as economy pillars in Indonesia must have a business planning. Calculation of the break-even point can be used to determine the minimum sales of products, prepare sales and profit budget, and monitor business performance. This study aims to help SMEs Sapi Mandiri Cipageran in calculating the break-even point. This type of research is qualitative with descriptive analysis. Data obtained from observation, direct interviews and documentation. The results showed that break-even point in pure milk products is 17,7 liters per day or 530 liters per month for one cow. In rupiah, sales reach the break-even point in the amount of Rp33.909.238. Then for yogurt products, the break-even point value is 20 bottles of yogurt or equal to Rp159.186. Meanwhile, the break-even value of mozzarella cheese products is 10 units or equal to Rp1.016.667.
Analisis Pengaruh Capital Adequacy Ratio dan Komite Audit Terhadap Profitabilitas Perusahaan Perbankan di Era Pandemi Covid-19
Authors: Sukma Rhiesmia , Burhany Dian Imanina
Published: April 2022

The bank's financial performance can be evaluated by profitability. In the era of the Covid-19 pandemic, especially during 2020 (March-December 2020), the profitability ratio of banks in Indonesia showed a decline. The ratio to measure the profitability of a bank is Return On Assets (ROA). ROA is important for banks because ROA is used to measure the effectiveness of the company in generating profits by utilizing its assets. Many factors affect ROA, including the Capital Adequacy Ratio (CAR) and the audit committee. To determine the effect of the Capital Adequacy Ratio (CAR) and the audit committee on the profitability of banking companies listed on the Indonesia Stock Exchange in 2020. This type of research is quantitative with a descriptive approach. The research sample uses a purposive sampling technique with the criteria of banking companies that publish Annual Reports in 2020, which are 43 banks. The data analysis method used is multiple linear regression analysis. The results of the study found that partially CAR had a positive and significant effect on ROA, but the audit committee had no significant effect on ROA. Furthermore, the CAR and the audit committee together (simultaneously) have no effect on ROA.
Pengaruh Persepsi Risiko dan Kepercayaan (Trust) pada Adopsi Layanan Fintech (Studi Kasus pada Layanan Pembayaran Digital Gopay)
Authors: Wijaya Eni , Susilawati Riauli
Published: April 2022

GoPay is the most popular digital payment in Indonesia. However, the increasing number of risks posed by GoPay adds to people's concerns in using GoPay. Even so, there are still some people who believe and continue to use it. Therefore, this study was conducted with the aim to determine whether there is an influence of perceived risk and trust in the use of GoPay services by using one of the constructs of the Technology Accepted Model (TAM), Actual Use. This study uses a quantitative approach. The data analysis technique used in this study is descriptive analysis and multiple linear regression. The results show that simultaneously perceived risk and trust affects the actual use of GoPay in Bandung. Partially, the perceived risk has a negative and significant effect on the actual use of GoPay. Meanwhile, trust has a positive and significant effect on the actual use of GoPay.
Dampak Teknik Akuntansi Kreatif dan Pajak Kreatif Terhadap Keandalan Laporan Keuangan Dengan Religiusitas Sebagai Variabel Moderasi (Studi Kasus: Akuntan di Kota Semarang)
Authors: Warno Warno , Widyasari Fiderika Dewi , Murtadho Ali
Published: April 2022

Abstract: This research is motivated by the number of managers who deliberately manipulate the company's financial statements to attract stakeholder interest and goals related to competition. This study aims to determine the effect of creative accounting and creative tax on the depth of financial statements with religiosity as a moderating variable. The objects in this study are accountants in companies located in the Wijaya Kusuma Industrial Estate, Semarang. The type of research used is quantitative research. Data was collected by distributing questionnaires presented on a Likert scale. Sampling in this study was conducted by purposive sampling obtained 34 respondents in 11 companies. The results showed that creative accounting and creative tax variables had a significant negative effect on the reliability of financial statements. And the religiosity variable moderates the creative accounting and creative tax variables on the reliability of financial statements.

Keywords: Financial Report Reliability, Creative Accounting, Creative Tax, Religiosity

 Financial Report Reliability, Creative Accounting, Creative Tax, Religiosity
Pengaruh Likuiditas, Solvabilitas dan Aktivitas Terhadap Profitabilitas: Bukti Empiris pada Perusahaan Properti dan Real Estate yang Terdaftar di Bursa Efek Indonesia
Authors: Rohendi Hendi , Sudradjat Sudradjat
Published: April 2022

This study aims to determine the effect of Liquidity, Solvency and Activity on Profitability of Property and Real Estate Companies Listed on the IDX either simultaneously or partially. The research method used in this research is quantitative with data collection techniques through financial statement documentation, then analyzed using multiple linear regression. The population in this study are Property and Real Estate Companies listed on the IDX for the period 2014-2017 with a sample of 24 companies. The results of the study show that (1) simultaneously Liquidity, Solvency and Activity have a positive and significant effect of 39.1% on Profitability in Property and Real Estate Companies Listed on the IDX. (2) Partially, Liquidity has a positive but not significant effect on Profitability, Solvency has a negative but not significant effect on Profitability, and Activities have a positive and significant effect on Profitability in Property and Real Estate Companies Listed on the IDX.
Pengaruh ITO terhadap NPM pada Perusahaan Makanan dan Minuman di BEI (2013-2018)
Authors: Fauziah Nurul Indah , Danisworo Dimas Sumitra , Laksana Banter
Published: April 2022

This research was conducted to test the level of influence of inventory turnover against Net Profit Margin in the companies of food and beverage listed on the IDX period 2013-2018. The objects used in this study are the financial statements of food and beverage companies listed on the IDX period 2013-2018. The population in this study amounted to 26 food and beverage companies and 5 samples were taken using purposive sampling techniques. The type of data used in this study is secondary data obtained from the company's official website. The independent variables used in this study are inventory turnover, whereas for the dependent variables used in this research is the NPM. The data analysis techniques used in this study are descriptive statistics analysis, simple linear regression analysis, and hypothesis testing using the help of SPSS software. The results showed significant supply turnover against NPM with an influence rate of 70,5%.
Pengaruh LDR, BOPO, dan NPL terhadap ROA pada BUSN Devisa Terdaftar di BEI Periode 2014-2018
Authors: Sadi’yah Yeni Siti Halimatus , Mai Muhamad Umar , Pakpahan Rosma
Published: April 2022

This research aims to analyse the influence of Loan To Deposit Ratio, Operational Efficiency Ratio and Non Performing Loan to Return On Asset at national private Bank of foreign exchange listed on Indonesia Stock Exchange period 2014-2018. The population of this research is the national private Bank of foreign exchange listed on the Indonesia Stock Exchange period 2014-2018, a research sample of 23 bank companies using the purposive sampling method. The analysis used to determine the influence of Loan To Deposit Ratio (LDR), Operational Efficiency Ratio (OER) and Non Performing Loan (NPL) to Return On Asset (ROA) is a descriptive and quantitative analysis with using the help of software Eviews 10. The results indicate that simultaneously LDR, OER, and NPL variables have significant effect on ROA. The LDR has a significant and positive impact on ROA, OER and NPL have significantly negative and significant impact on ROA
Pengaruh CR dan DER terhadap ROA pada Perusahaan Kosmetik dan Barang Keperluan Rumah Tangga
Authors: Ardhefani Henna , Pakpahan Rosma , Djuwarsa Tjetjep
Published: April 2022

The aim of this research are to know the effect of CR and DER to ROA on companies subsector of cosmetics and household listed on Indonesia Stock Exchange Period 2012 - 2019. The research method used is quantitative descriptive method. The data used are secondary data in the form of annual financial reports. This research used purposive sampling method and obtained 5 samples of companies subsector of cosmetics and households listed on Indonesia Stock Exchange Period 2012 - 2019. Analytcal techniques used  are classical test assumptions and multiple linear regression hypothesis test using partial T test and F test simultaneously at the significance level of 5% with SPPS version 26. This research showed partially CR is not having significant effect on ROA, and DER has a positive and significant effect on ROA. Therefore, simultaneously that CR and DER have a significant effect on ROA.