bluuebunny/crossref_metadata_2025 huggingface dataset:
PENGARUH UNDANG-UNDANG ITE TERHADAP HUBUNGAN ANTARA MASYARAKAT DAN PEMERINTAH DI KOTA PADANGSIDIMPUAN
Authors: Siregar Khoiruddin Manahan
Published: May 2023

This article describes the influence of the ITE Law on the relationship between the community and the government in Padangsidimpuan City. To determine the effect of public and government relations, the author uses a qualitative method, namely seeking information or data by directly interviewing the people of Padangsidimpuan City about the influence of the ITE Law on public relations with the government.The findings in the search, that the ITE Law is for the majority of the people of Padangsidimpuan City, that this ITE Law has a positive influence where people get accurate news, avoids hoax news and does not separate the community from the government, but a small part of the people of the City Padangsidimpuan argues that the presence of this ITE Law actually contains a dividing space between the government and the community where people are afraid to criticize the government through the internet.
RELEVANSI TERM KAFA’AH PADA PERNIKAHAN ADAT BATAK MANDAILING DI TABAGSEL
Authors: Siregar Sawaluddin , Mardia Misbah
Published: May 2023

In the Mandailing community in Tabagsel, they tend to ignore the element of estrangement when looking for a life partner for their child. Most of those who marry off their sons and daughters without sequencing become households with broken homes, often resulting in divorce. This research is categorized as descriptive qualitative research. The data is taken from predetermined informants (people who marry without kafa'ah, village heads, traditional leaders, and in the form of books, the results of previous research that are relevant to the focus of the study. With data collection techniques through observation, interviews, and documentation.            The findings in the field indicate that the mandailing community in Southern Tapanuli. Not paying attention to the kafa'ah factor in marriage. Many are married without kafa'ah in the household. Often found discrepancies, fights, cornering each other, not even a little lead to a court (divorce) due to not paying attention to the element of kafaah in question. Through this research, it is hoped that in the future the community will consider the kafaah element in marriage. Because with kekufu in a marriage it will be easy to make the family sakinah, mawaddah warahmah, my home is my heaven
PEMBERDAYAAN ZAKAT PRODUKTIF DALAM PENINGKATAN PENDAPATAN DAN KESEJAHTERAAN MASYARAKAT (MUSTAHIQ ZAKAT) DI KOTA PADANGSIDIMPUAN
Authors: Nasruddin Kholil Harahap Muhammad Arsad Nasution, Ahmad Soleh Hasibuan
Published: May 2023

This paper discusses the distribution of productive zakat to improve the economy and community welfare (mustahiq zakat) in Padangsidimpuan City which is carried out by Baznas Padangsidimpuan City. The method used in this paper is a qualitative method, because this paper describes the empowerment of productive zakat in improving people's welfare (mustahiq zakat) by Baznas Padangsidimpuan City. Furthermore, from this description, we want to find an explanation of the tools used by the Padangsidimpuan City Baznas in distributing productive zakat, to improve the welfare of mustahiq. Productive zakat funds assistance to mustahiq can be said to increase their income. Mustahiq's welfare increases gradually and slowly. The average increase in mustahiq's monthly income is around 20%. This figure can be seen from the comparison before receiving productive zakat funds with after receiving the funds. However, this increase is not permanent but only applies four or five months after the zakat funds are received. After that the income began to decline like the previous income. This is due to the absence of good financial management. Too much profit is used as consumptive so that business capital is sucked in for daily needs.
MENAKAR EFEKTIVITAS GUGATAN BALIK HARTA BERSAMA DALAM PERKARA KONVENSI PERCERAIAN DI PENGADILAN
Authors: Hasibuan Putra Tondi Martu
Published: May 2023

Counterclaim lawsuit is a manifestation of the implementation of a simple, fast, and low-cost judicial principle. Effectiveness is one of the goals, because both convention and counter-convention lawsuits will be examined and decided together in one decision. In the context of religious courts, joint property disputes can be filed in a reconciliation lawsuit even though the subject matter of the convention lawsuit is divorce. However, the emergence of joint property disputes through the reconciliation lawsuit erodes the main purpose of the existence of the reconciliation lawsuit itself. This research is a normative legal research conducted by examining library materials. In terms of its nature, this research is descriptive-analytic, which is an attempt to collect and compile a data, then analyzed and interpreted. To facilitate understanding, this research uses a normative juridical approach (statute approach). The type of data used is in the form of library materials consisting of primary, secondary, and tertiary legal materials. These data are elaborated and analyzed qualitatively by using inductive method. The result of of this research indicate that the existence of joint property reconvention lawsuits in divorce convention cases is less effective.  At the implementation level, there will not be a mediation process, different procedural law, and sociologically it is a trigger for unregistered marriages from the litigants.
KONSEP HARTA DALAM TINJAUAN MAQASHID AL-SYARIAH
Authors: Ridwan Muannif
Published: May 2023

This study aims to describe the concept of maintaining property in maqashid al-syariah and its relationship with property. In maqashid al-syariah property becomes one of the important topics that get attention so that people can maintain their property as well as possible. In the teachings of Islam it is also said that the use of wealth must be in the way of Allah and must always serve Allah. Islam has given more special attention to the property owned so that it can provide the value of worship in the sight of Allah SWT so that a happier life is achieved in this world and the hereafter. In this study the author uses a type of library research or also known as Library Research. This study concludes that property and ownership is one of the most important topics of discussion in Islamic law. Its position is related to one another, this is evidenced by the maqashid al-syariah method in which there are five elements, one of which discusses property (hifzh al-mal). The relationship between property and maqashid al-syariah, among others, is in the form of circulation and circulation, which aims to make the assets owned move in various circles, not only based on one group, and the next relationship lies in a condition that is far from problems so that it can avoid problems. danger and the relationship between property and maqashid al-syariah is with justice in managing assets.
PROBLEMATIKA NIKAH SIRI DI KECAMATAN MUARA SIPONGI DALAM TINJAUAN HUKUM ISLAM DAN HUKUM NEGARA
Authors: Hasanah Uswatun
Published: May 2023

Siri marriage problems are increasingly rampant, one of which is in Muara Sipongi District. The existence of underage couples who are married in series for reasons of age does not reach the age limit for marriage according to the regulations of the Act. As for this research, it is included in empirical (field) research. The research informants are the parties to the marriage. It is known that in Islamic law siri marriage is legal, but in the law of the country it is invalid because of the necessity for marriages to be recorded (marriage registration). However, marriage should be avoided because it will complicate their domestic affairs in the future.
تطبيق الإيجارة المزرعة في قرية بينتوجو منظور عن فقه المعاملة
Authors: Nasution Muhammad Yusuf
Published: May 2023

الإيجارة هي نشاط خاص بالمعاملة يتعلق بتوفير الأجور والإيجارة من خلال عقد محدد. في قرية بنتوجو، تتم ممارسة أنشطة الإيجارة من خلال عقد مضمون فيه. وأما عقود الإجارة التي غالبا ما تحدث في عقود الإيجارة الأراض الزراعية ، وفيها و نقود الثمن لا يجوز تنفيذها لشك أحد الأطراف، وهذا مخالف لممارسة المعاملة التي شرعها الإسلام. وجد الباحث مشاكل يجب دراستها على شكل: ماذا يقوم سكان قرية بنتوجو بممارسة النقود الثمن على أنشطة تأجير الأرض الزراعة؟كيف ترتبط المراجعة الفقهية بالمعاملة بممارسة النقود الثمن على أنشطة تأجير الأرض الزراعة في قرية بنتوجو؟.نوع هذا البحث هو بحث ميداني(field research) . طرق جمع البيانات على شكل مقابلات وتوثيق. أجريت المقابلات مع رئيس القرية، ومسؤول القرية، والمجتمع الذي نفذ الإتفاقية الإيجارة الأراض الزراعية. ثم يتم ترتيب البيانات التي قد جمعها بانتظام للحصول على استنتاجات من البحث. أما الخلاصة فيها كما يلي صعوبة الاقتصاد المجتمع الزراعة هي أسهل الأعمال التي يمكن القيام بها مقتضيات من ضرورات الحياة الأراض الممتدة لا تضمن بالضرورة حياة الجيدة، وهذا لسبب في أن أصحاب الأراض يستخدمون النقود الثمن في تأجير الأرض الزراعية.يتضح من دراسة فقه المعاملة أن هذا النشاط يحتوي على عدة عيوب لدى الجهات التي تقوم به. في الشريعة الإسلامية، من السهل أيضًا على بعضنا البعض القيام بأنشطة المعامل مثل الإيجار لأن هذا جزء من حبل الناس. لأن نشاط المعاملة هذا هو شكل من أشكال المساعدة المتبادلة بين الكائنات الاجتماعية في التخفيف من احتياجاتهم. وعليه فإن فقه المعاملة يحرم الممارسات الضارة بين البشر وخاصة المسلمين. لذلك أمر في الفقه المعاملة لمساعدة إخوانهم من البشر، ولا تضرا بينهم
Putusan MK Yang Bersifat Positif Legislature
Authors: Pane Ramadhan Siddik , Kurniawan Puji
Published: May 2023

The Constitutional Court in the case of testing the constitutionality of an Act is declared granted, then by the provisions of the laws and regulations only given the authority to declare the material content of paragraphs, Articles, and / or parts of the Law contrary to the 1945 Constitution and has no binding legal force. Or make the process of making laws contrary to the mechanism of formation that has been regulated by the laws and regulations (negative legislature). However, in some cases the Constitutional Court in its ruling included new legal norms (positive legislatures) that are considered to have entered the realm of legislative authority. So based on this there is an increase in the authority of the Constitutional Court from negative legislature to positive legislature. Based on the picture of the problem, researchers want to further know how the constitutional court's authority in issuing positive legislature decisions, then what consideration factors are used by constitutional court judges in issuing positive legislature rulings. This research is assembled based on the type of juridical normative research by utilizing the legal approach and the case approach. The theory used in solving the above problems is to use progressive legal theory and positive legal theory. So that with the data obtained from the results of case review and law, it is processed by reducing data and cases. The results of this study state that the Constitutional Court in the case of testing the constitutionality of the Law based on norms stipulated in the laws and regulations only as a norm-spinning or negative legislature. However, based on the knife analysis of the progressive legal theory, the authority can become a new norm maker with various rules included in the sound of the verdict or positive legislature. The factor considered by constitutional court judges in stringing together the ruling is substantive justice considerations based on progressive theory, then this is supported by the purpose of the establishment of law in Islam is to realize justice.
Pendapat Penegak Hukum Terhadap Pemidanaan Penyelenggara Jalan Di Kota Padangsidimpuan ditinjau Menurut Hukum Pidan Islam
Authors: Harahap Efnilasari
Published: May 2023

Road operators are activities that include the regulation, financing, construction and supervision of roads, planning policy formulation activities, drafting, general planning, and drafting road laws and regulations, carried out by the authorities aimed at realizing order and legal certainty in road operators, realizing the role of the community in road operators and realizing the role of road operators and optimally providing services to road operators  community. The formulation of the problem from this study is how the law enforcement opinions of the city of Padangsidimpuan towards the punishment of road operators and how the review of Islamic criminal law on the punishment of road operators. The purpose of this study is to find out the opinion of padangsidimpuan city law enforcement towards the punishment of road operators and to find out the review of Islamic criminal law on the punishment of road operators. The theory used in this study is a theory related to the punishment of road operators and Law No. 22 of 2009 concerning Road Traffic and Transportation. furthermore, the type of research used is field research (field research) using qualitative analysis with deductive methods. The results of the research obtained were that the punishment of belun road operators was carried out in the city of Padangsidimpuan due to public ignorance regarding the existence of Law No. 22 of 2009 concerning Road Traffic and Transportation and the factors that influenced the non-implementation of article 273 of Law No. 22 of 2009 concerning Road Traffic and Transportation was the lack of socialization of the Law to the Community.
Konsep Kompilasi Hukum Ekonomi Syariah Terhadap Gaji Buruh Di Desa Sawah Mudik Kecamatan Ranah Batahan
Authors: Roah Inim , Simanjuntak Dahliati
Published: May 2023

This research examines how the determination of workers' wages in the village of Sawah Mudik is reviewed according to the Compilation of Sharia Economic Law. The research method used is field research with a qualitative approach. Primary data sources, namely primary data sources in this study are male workers, female workers and land owners while secondary data is from books and scientific journals that are considered relevant to this research. data collection techniques with observation, interviews and documentation, with qualitative descriptive data analysis techniques. The results of this study are that the wages given by the employer to farm laborers in Sawah Mudik Village, Ranah Batahan District, West Pasaman Regency, if they work all day are IDR 70,000.00, if the workers are given lunch by the employer and if the workers bring their own lunch, the workers receive a wage of IDR 80,000.00. Meanwhile, the wages that female workers get if they work all day are IDR 50,000.00, if the workers are given lunch by the employer and if the workers bring their own lunch, the workers receive IDR 60,000.00. The wages made by the Sawah Mudik village community are in accordance with the review of the compilation of Sharia economic law if Mu'ajir has made a difference in wages between male and female farm workers on the basis that female farm workers often arrive late, men are more responsible for earning a living for his family and the majority of men do their jobs faster. If the mu'ajir gives a difference in wages between male and female farm workers on the basis of following customs that have become the customs of the local community without considering the above factors even though the type of work and the workload of male and female farm workers are the same. So in Sharia Economic Law it is not allowed because the Koran does not recognize differences between men and women because before Allah men and women have the same degree of position and what distinguishes between men and women is only their faith and piety. So this will be detrimental to farm workers and can cause harm.
EBA-SP BERDASARKAN PRINSIP SYARIAH
Authors: Alim Siregar Syapar
Published: May 2023

EBA  is an investment intrumnet obtained from securitieus that are written in paper in the form of documents and in the form of letters where the results of participation are in accordance with Islamic shariah and do not violate on the law, and only operate in the middle or secondary market in Islamic banking as a means of payment and the public or investorsusing it when the money is no longer stable or maybe the interest rate in one bank is not balanced and has a big influence on investment and state money besides that the partcipationt letter has a lot of of influence not only negative but also positive impacts, for example having coupon offers so that investors are tempted to ionvest and work together. if we look at the income using the capital market this has more related , this has more advantage that will be more related to ojk and provides more goodness, makes everything complete, anda strategy that is in great demand among banks but is basid in sharia by not quoting interest because islam for birds ususry abd interest , the award letter is only issued once so that the negative balance is able to control sharia banking if we look at the case studies in the united  states the real studies error is in the understanding of the secondary  pattern and the existence of several levels of securities so that it is not balanced and stable and results in a lot of debt.
ANALISIS IMPLEMENTASI DIGITALISASI PUTUSAN PERADILAN DI DIREKTORI PUTUSAN MAHKAMAH AGUNG REPUBLIK INDONESIA
Authors: Rahayu Dwi , Sulistyo Al Qodar Purwo
Published: May 2023

Many legal cases have received sharp attention from the public. Both to law enforcement officers, law enforcement institutions, and judges' decisions that are considered "not fulfilling" the values of justice for the community. Binziad Kadafi , a member of the Judicial Commission (KY). He revealed that the public has a negative perception of the integrity and inconsistency of judges' decisions. Given the importance of a decision for judges as law enforcers at the forefront, and also considering the importance of a decision as jurisprudence, and also as a form of internal and externaal supervision. The purpose of this research is the author would like to dig deeper into the implementation Digitizing Judicial Decisions in the Directory of Decisions of the Supreme Court. This type of research is classified as descriptive with a qualitative approach. The data sources for this research are judges, advocates, justice seekers and legal sources and legal literature related to this research. Furthermore, the research method used is the distribution of questionnaires to 17 judges located in 5 (five) islands in Indonesia, namely Sumatra, Java, Kalimantan, Bali and Papua. Questionnaires were also distributed to 50 advocates/community seeking justice in the Sidoarjo Religious Court area. Then the data analysis technique in this study was carried out in three stages, namely: data reduction, data interpretation and conclusion drawing and Likert Scale 4 assessment. The results of the study prove that the implementation of digitizing decisions in the Supreme Court Decision Directory is included in the "Very Good" category. with the digitization of decisions, it encourages judges to be more thorough, faster, and more efficient in making their decisions. However, there needs to be improvement efforts such as increasing server capacity and also server maintenance .
Understanding Rising Concentration at the Extremes of the U.S. Income Distribution
Authors: Thompson Jeffrey , Bricker Jesse , Parisi Michael
Published: May 2023

We explore the importance of income fluctuations at the top of the U.S. income distribution in understanding rising income concentration. Very high income families—including the top .001 percent—account for much of the recent top income growth, but are under-studied even in the literature exploring high-income groups. Using 3-year panels of tax records from 1997 to 2013 we document that top-income shares are lower—typically by about 20 percent—when measured by using a three-year income average, and that cyclical income fluctuations are greatest at the very top of the income distribution. Trends toward rising concentration over time, however, cannot be explained by these fluctuations, as growth in top-income shares is comparable for annual and three-year average income, and measured income dispersion has increased only for the very top group. Further, the probability of remaining in the highest income groups over multiple years increased over the sample period.
Deflagration to Detonation Transition in Heterogeneous Mixtures Containing Ethanol/Acetone and Oxygen
Authors: Kadosh Hertzel , Michaels Dan
Published: May 2023

Liquid fuel is the choice for volume-limited propulsion systems, including detonation-based propulsion. A liquid fuel with high vapor pressure has the advantage of more fuel vapor in the mixture, which supports the transition from deflagration to detonation. This paper reports on an experimental study of deflagration-to-detonation transition (DDT) in a pulse detonation engine with heterogenous mixtures of oxygen and ethanol or acetone. Single-cycle tests were taken for different fuels, equivalence ratios, and DDT enhancement methods. The size distribution of fuel droplets was characterized at the atomizer and engine exit. The effect of the fuel evaporation was dominant for the acetone spray only. Comparing the measured detonation velocities of the two mixtures, a lower velocity deficit relative to the theoretical Chapman–Jouguet detonation velocity was measured for the acetone–oxygen mixtures, and this behavior is related to the higher amount of fuel vapor that existed in the mixtures. Moreover, a shorter transition to detonation was observed in the acetone–oxygen mixture. The addition of a Shchelkin spiral reduced the DDT distance; however, the Chapman–Jouguet condition could be reached only downstream of the obstacle. The measured detonation cell size of the heterogeneous acetone–oxygen mixture was smaller than that of the ethanol–oxygen mixture, indicating that it is more detonable.
Fast Homotopy for Spacecraft Rendezvous Trajectory Optimization with Discrete Logic
Authors: Malyuta Danylo , Açıkmeşe Behçet
Published: May 2023

This paper presents a computationally efficient optimization algorithm for solving nonconvex optimal control problems that involve discrete logic constraints. Traditional solution methods require binary variables and mixed-integer programming (MIP), which is prohibitively slow and computationally expensive. This paper proposes a faster and computationally cheaper algorithm that can produce locally optimal solutions in seconds. This is achieved by blending sequential convex programming and numerical continuation into a single iterative solution process. The algorithm approximates discrete logic constraints with smooth functions and uses a homotopy parameter to control the accuracy of this approximation. The homotopy parameter is updated such that, by the time the algorithm converges, the smooth approximations enforce the exact discrete logic. The effectiveness of this approach is numerically demonstrated for a realistic rendezvous scenario inspired by the Apollo Transposition and Docking maneuver. In less than 15 s of cumulative solver time, the algorithm finds a fuel-minimizing trajectory that obeys the following discrete logic constraints: thruster minimum impulse-bit, range-triggered approach cone, and range- triggered plume impingement. The optimized trajectory uses significantly less fuel than reported NASA design targets.
Passively Safe and Robust Multi-Agent Optimal Control with Application to Distributed Space Systems
Authors: Guffanti Tommaso , D’Amico Simone
Published: May 2023

This paper presents a novel methodology to enforce motion safety guarantees even in the event of a sudden loss of control capabilities by any agent within a multi-agent system. This passive safety methodology permits the replacement of point-evaluated constraints on the trajectory following a contingency with a single function of the integration constants of the equations of motion at contingency instants. The effects of uncertainties on the trajectory are compensated for through the method of variation of parameters. This permits a reduction in the number of required constraints by one polynomial degree in the number of discrete time samples, and allows computationally efficient enforcement of passive safety within a multi-agent optimal control problem, solvable using direct methods. The main application is distributed space systems employing miniaturized low-size-weight-and-power and commercial-off-the-shelf technology, which reduce mission financial costs at the expense of reliability. Experimental results for the upcoming VIrtual Super-resolution Optics with Reconfigurable Swarms mission, as well as complementary formation-flying test cases in eccentric orbits, demonstrate the advantages of the proposed methodology in achieving fault-tolerant safety guarantees, as well as computational efficiency.
High-Fidelity Gradient-Based Wing Structural Optimization Including Geometrically Nonlinear Flutter Constraint
Authors: Jonsson Eirikur , Riso Cristina , Monteiro Bernardo Bahia , Gray Alasdair C. , Martins Joaquim R. R. A. , Cesnik Carlos E. S.
Published: May 2023

Lightweight high-aspect-ratio wings make aircraft more energy efficient thanks to their lower induced drag. Because such wings exhibit large deflections, design optimization based on linear flutter analysis of the wing undeformed shape is inadequate. To address this issue, we develop a framework for integrating a geometrically nonlinear flutter constraint, which considers in-flight deflections, into a high-fidelity gradient-based structural optimization. The wing mass and stress constraints are evaluated on a linear built-up (detailed) finite element model to capture realistic structural features. The geometrically nonlinear flutter constraint is based on a condensed low-order beam representation of the built-up finite element model, which captures the impact of in-flight deflections with tractable computational effort for optimization. The flutter constraint is differentiated with respect to the detailed structural model sizing variables using the adjoint method to enable large-scale optimizations. The framework is demonstrated by minimizing the mass of a wingbox model subject to the geometrically nonlinear flutter constraint along with stress and adjacency constraints. The geometrically nonlinear flutter constraint adds a penalty of up to 60% of the baseline mass due to the impact of in-flight deflections on the flutter onset speed and its mechanism. In contrast, a linear flutter constraint evaluated on the undeformed wing adds a mass penalty of only 10%. This methodology can help design energy-efficient aircraft with high-aspect-ratio wings, which require geometrically nonlinear flutter analyses early in the design cycle.
Complex Standard Eigenvalue Problem Derivative Computation for Laminar–Turbulent Transition Prediction
Authors: Shi Yayun , Song Chao , Chen Yifu , Rao Hanyue , Yang Tihao
Published: May 2023

As a high-fidelity approach to transition prediction, the coupled Reynolds-averaged Navier–Stokes (RANS) and linear stability theory (LST)-based [Formula: see text] method is widely used in engineering applications and is the preferred method for laminar flow optimization. However, the further development of gradient-based laminar flow wing optimization schemes is hindered by a lack of efficient and accurate derivative computation methods for LST-based eigenvalue problems with a large number of design variables. To address this deficiency and to compute the derivatives in the LST-based solution solver, we apply the adjoint method and analytical reverse algorithm differentiation (RAD), which scale well with the number of inputs. The core of this paper is the computation of the standard eigenvalue and eigenvector derivatives for the LST problem, which involves a complex matrix. We develop an adjoint method to compute these derivatives, and we couple this method with RAD to reduce computational costs. In addition, we incorporate the LST-based partial derivatives into the laminar–turbulent transition prediction framework for the computation of total derivatives. We verify our proposed method with reference to finite difference (FD) results for an infinite swept wing. Both the intermediate derivatives from the transition module and total derivatives agree with the FD reference results to at least three digits, demonstrating the accuracy of our proposed approach. The fully adjoint and the coupled adjoint–RAD methods both have considerable advantages in terms of computational efficiency compared with iterative RAD and FD methods. The LST-based transition method and the proposed method for efficient and accurate derivative computations have prospects for wide application to laminar flow optimization in aerodynamic design.
Linear and Nonlinear Disturbance Evolution on the Frustum of Hypersonic Ogive Cylinders
Authors: Goparaju Hemanth , Kanawade Kunal C. , Unnikrishnan S. , Gaitonde Datta V.
Published: May 2023

Aspects of transition mechanisms on a 14° sharp-nosed ogive cylinder at Mach 6 are elucidated by considering linear and nonlinear disturbance evolution of freestream stochastic and wave packet forcing at different locations downstream of the ogive-cylinder junction. The spectral response of the stochastic forcing displays favorable agreement with experimental observations from Air Force Research Laboratory on which the configuration is based. Intermittent wave packets are generated from small-amplitude continuous freestream pressure forcing. Linear wave packet evolution reveals that Mack modes are the dominant primary instabilities, followed by relatively weaker first-mode waves. The nonlinear wavepacket displays a three-legged wall pressure perturbation signature, which is traced to spanwise curvature effects, and fundamental resonance is the dominant secondary instability mechanism. At higher amplitudes of excitation, weak signatures of subharmonic and oblique resonance phenomena are identified. Downstream placement of the small-amplitude disturbance diminishes amplification of first-mode waves; however, with high-amplitude forcing, the location of actuation does not significantly vary the disturbance evolution signature or the secondary instability mechanisms.
Broadband Acoustic Modal Identification by Array Nonsynchronous Measurements with One Reference
Authors: Wang Ran , Yu Mingjie , Bai Yue , Yu Liang , Dong Guangming
Published: May 2023

This paper proposes a broadband acoustic modal identification method based on nonsynchronous measurements from a microphone array, which overcomes the acoustic modal aliasing problem caused by a limited number of microphones. In the proposed method, the number of measurement points is augmented by sequentially rotating a circular microphone array that is circumferentially mounted in the wall of the compressor duct. This technique employs only one reference microphone to enhance the robustness of the cross-spectral matrix completion for nonsynchronous measurements. The fast iterative shrinkage threshold algorithm is adopted to iteratively complete the cross-spectral matrix of all measurement points for acoustic modal identification. The in-duct acoustic modal coefficients of the broadband noise are then determined using the least-squares method with the sound pressure vector recovered from the completed cross-spectral matrix. The accuracy of the cross-spectral matrix and the identified acoustic modals is verified through numerical simulations. The proposed method is validated by experimental results from an axial flow compressor. The results show that it can effectively suppress the modal aliasing problem and identify the azimuthal modes of compressor broadband noise.
Instability of Rotating-Cone Boundary Layer in Axial Inflow: Effect of Cone Angle
Authors: Tambe Sumit , Schrijer Ferry , Gangoli Rao Arvind , Veldhuis Leo
Published: May 2023

Boundary-layer instability on a rotating cone induces coherent spiral vortices that are linked to the onset of laminar–turbulent transition. This type of transition is relevant to several aerospace systems with rotating components, e.g., aeroengine nose cones. Because a variety of options exist for the nose-cone shapes, it is important to know how their shape affects the boundary-layer transition phenomena. This study investigates the effect of varying cone angle on the boundary-layer instability on rotating cones facing axial inflow. It is found that increasing cone angle has a stabilizing effect on the boundary layer over rotating cones in axial inflow. The parameter space of Reynolds number [Formula: see text] and local rotational speed ratio [Formula: see text] is experimentally explored to find the spiral vortex growth on rotating cones of half angle [Formula: see text], 45°, and 50°. The previously addressed cases of [Formula: see text] and 30° are also revisited. Increasing half-cone angle is found to have a stabilizing effect on the boundary layer on the rotating cones with [Formula: see text]; i.e., the spiral vortex growth is delayed to higher [Formula: see text] and [Formula: see text]. This effect diminishes when the half-cone angle increases from [Formula: see text] to 50°. The spiral vortex angle [Formula: see text] decreases with increasing rotational speed ratio [Formula: see text] for all the investigated cones, irrespective of the half-cone angle. However, the instability on the broader cones is found to induce shorter azimuthal wavelengths.
THE ROLE OF THE INFORMATION FACTOR IN MODELING THE STABILITY OF THE FINANCIAL MARKET
Authors:   Kazan (Volga region) Federal University, Kazan, Russia, Akhmetov R. R.
Published: May 2023

The information function of the financial market plays a key role in the pricing of financial assets. As the importance of information rises, it becomes more expensive and its value begins to exceed the value of the market assets themselves. This gives grounds for including the information factor as a variable not only in the pricing model of financial assets, but also in the financial market as a whole. Information acts as an argument for a non-linear function of return, price and risk level. The stable functioning of the financial market today is of paramount importance for the global financial system and the development of national economies. Is the stock market secondary or does it affect real economic activity? The article touches upon the potential effects of financial markets, which follow from the informational role of market prices. It is shown that taking into account the feedback effect from market prices to the real economy significantly changes our understanding of the pricing process, information content of prices and trading behavior of speculators. The paper considers linear martingale and nonlinear conditionally Gaussian models. In practice, they are not enough to reflect the asymmetric effects of external influences (exogenous factors). For this reason, it is proposed to use fractal Brownian models along with them. At the same time, one should take into account the degree of information content of the price itself, the reflexivity of price information, i.e. the ability of prices to form market expectations and the psychological factor leading to non-linearity and dynamic chaos.
AUDIT AS A TOOL FOR REDUCING COMPLIANCE RISKS OF DIGITAL INVESTMENT ECOSYSTEM PARTICIPANTS
Authors:   Amur State University, Blagoveshchensk, Russia, Yakimova V. A.
Published: May 2023

The article is devoted to the problem of developing mechanisms to increase the sustainability of the digital investment ecosystem, in which the main participants are investors, borrowers or other persons attracting investments, the Bank of Russia as a regulator, a professional organization. The purpose of this study is to identify ways to trust the system of digital investment platforms by developing financial compliance methods for ecosystem participants. In the course of the study, methods of statistical analysis, generalization and grouping of compliance risk assessment, ecosystem modeling with the allocation of functions and actions of its participants were used. The ecosystem approach was used as a basic approach, which allows revealing interactions and assessing the impact of the risks of one participant on the stability of the ecosystem as a whole. The study found that participants are exposed to high compliance risks that can lead to a system default and cause systemic risks of a chain of bankruptcies due to defaults, changes in rules and restrictions. The level of compliance risk for crowdfunding participants was 27%, and the analysis of operators’ declarations identifies 23 types of risks that an investor takes on and which carry the threat of loss of invested capital. High risks and their diversification led to the conclusion that it is necessary to build investment compliance control procedures into the investment ecosystem, which can be carried out by audit organizations as assurance tasks. The results of the study are of practical importance for the development of the methodological apparatus of compliance in the process of carrying out activities by audit organizations and the development of a system for regulating the activities of investment ecosystems by the Bank of Russia.
Muhasebe Meslek Mensuplarının Psikolojik Sermayelerinin Tükenmişliğe Etkisi Üzerine Bir Araştırma
Authors: SARIÇİÇEK Reyhan
Published: May 2023

Bu araştırma muhasebe meslek mensuplarının psikolojik sermayelerinin tükenmişliğe etkisini ölçmek üzere gerçekleştirilmiştir. Bu kapsamda Balıkesir Serbest Muhasebeci ve Mali Müşavirler Odasına kayıtlı 408 meslek mensubundan anket yöntemi ile veri toplanmıştır. Araştırma verileri SPSS 23 programı ile analiz edilmiştir. Araştırma analizleri sonucunda, psikolojik sermayenin tüm boyutlarının duygusal tükenme üzerinde anlamlı bir etkisi olmadığı, psikolojik sermayenin umut boyutunun duyarsızlaşma üzerinde anlamlı ve negatif bir etkisinin olduğu, psikolojik sermayenin psikolojik dayanıklılık, umut ve özyeterlilik boyutlarının ise kişisel başarı hissi üzerinde anlamlı ve pozitif bir etkisi olduğu saptanmıştır. Ayrıca kişisel başarı hissindeki değişimin %86,2’si psikolojik dayanıklılık, umut ve özyeterlilik tarafından açıklanmaktadır.
Interlaboratory Study Assessing the Analysis of Supercapacitor Electrochemistry Data
Authors: Gittins Jamie W. , Chen Yuan , Arnold Stefanie , Augustyn Veronica , Balducci Andrea , Brousse Thierry , Frackowiak Elzbieta , Gómez-Romero Pedro , Kanwade Archana , Köps Lukas , Jha Plawan Kumar , Meo Michele , Pandey Deepak , Pang Le , Presser Volker , Rapisarda Mario , Rueda-García Daniel , Saeed Saeed , Shirage Parasharam M. , Ślesiński Adam , Soavi Francesca , Thomas Jayan , Titirici Maria-Magdalena , Wang Hongxia , Xu Zhen , Yu Aiping , Zhang Maiwen , Forse Alexander C.
Published: May 2023

Supercapacitors are fast-charging energy storage devices of great importance for the development of robust and climate-friendly energy infrastructures for the future. Research in this field has seen rapid growth in recent years, hence consistent reporting practices must be implemented to enable reliable comparison of device performance. Although several studies have highlighted the best practices for analysing and reporting data from such energy storage devices, there is yet to be an empirical study that investigates whether researchers in the field are correctly implementing these recommendations, and which assesses the variation in reporting between different laboratories. Here, we address this deficit by carrying out the first interlaboratory study of the analysis of supercapacitor electrochemistry data. We find that the use of incorrect formulae and researchers having different interpretations of key terminologies are the primary causes of variability in data reporting. Furthermore, we highlight the more significant variation in reported results for electrochemical profiles showing non-ideal capacitive behaviour. From the insights gained through this study, we make additional recommendations to the community to help ensure consistent reporting of performance metrics moving forward.
Benchmarking Density Functional Theory Methods for Metalloenzyme Reactions: The Introduction of the MME55 Set
Authors: Wappett Dominique , Goerigk Lars
Published: May 2023

We present a new benchmark set of metalloenzyme model reaction energies and barrier heights, which we call MME55. The set contains eleven different enzymes, representing eight transition metals, both open and closed shell systems, and system sizes of up to 116 atoms. We use three DLPNO-CCSD(T)-based approaches to calculate reference values, against which we then benchmark the performance of a range of density functional approximations with and without dispersion corrections. Dispersion corrections improve the results across the board, and triple-ζ basis sets provide the best balance of efficiency and accuracy. While Jacob’s Ladder is reproduced for the whole set based on averaged mean absolute deviations, hybrid DFT is preferred over double hybrids for copper- dependent enzymes, where MP2 correlation seriously adversely affects the results. Despite the popularity of B3LYP in computational enzymology, it is not a strong per- former on our benchmark set, and we discourage its use for enzyme energetics. Instead, we recommend the range-separated hybrids ωB97M-V and ωB97X-V combined with the def2-TZVPP basis set for applications, as they are a great compromise between accuracy and efficiency and have al- ready been shown to be robust across many other types of chemical problems.
Internet nunca fue democrático: la historia reciente del mito de la libertad en un mundo hiperconectado.
Authors: Fernández-Rovira Cristina , Giraldo Santiago
Published: May 2023

Internet fue presentado en la década de 1990 como la tecnología que permitiría tanto la integración de la multitud en la economía como la participación política y el desarrollo deliberativo democrático en las ágoras virtuales. En sus 30 años de historia masificada, su promesa se ha demostrado fallida. Este capítulo desarrolla la historia crítica de los últimos 30 años de evolución tecnológica ligada a internet. La búsqueda de la libertad en el mundo hiperconectado ha dado paso a la felicidad instantánea como el camino más corto de control de la sociedad. Las herederas del mito ―las redes sociales― representan el universo monopolizado de la atención, la polarización y la confrontación encapsulada en hashtags. Lo terrorífico es que los protagonistas de la dominación no esconden sus intenciones mientras el ciudadano/usuario, que las conoce, decide mantenerse privado de la libertad. No pretende salir del cómodo y sofisticado engaño del soft power tecnológico.
Ukrainian Version of the Acute Cystitis Symptom Score (ACSS) for Diagnostics and Patient-Reported Outcome of Acute Uncomplicated Cystitis. Part I. Linguistic validation and Cognitive assessment
Authors: Naber K.G. , Alidjanov J.F. , Dekthiar Y.M. , Molchanov R.M. , Sonnyk E.G. , Pasiechnikov S.P. , Samchuk P. , Stus V.P. , Havva N.V. , Antonyan I.M. , Pilatz A. , Wagenlehner F.M.E.
Published: May 2023

The Acute Cystitis Symptom Score (ACSS) was originally developed in Uzbek and Russian language as a self-reporting questionnaire for the clinical diagnosis and follow-up of an acute episode of uncomplicated cystitis (AC) in women based on complains and their effect on the quality of life. After professional forward and backward translations the cognitive assessment of the Ukrainian version of the ACSS was performed in female subjects with different ages and educational levels and in medical professionals treating such patients. After considering all comments of the female subjects and the professionals the final version of the Ukrainian ACSS could be obtained to be further used in clinical studies.
UJI PERFORMANSI ALAT DESTILASI UNTUK PEMURNIAN MINYAK DARI LIMBAH PLASTIK
Authors: Sirun Artian , Priyono Priyono , Bawano Franklin , Pinangkaan Niko
Published: May 2023

In everyday life the use of plastic materials is very dominant. The use of this plastic material from year to year has greatly increased, which has resulted in an increase in plastic waste. Various parties have conducted research to reduce plastic waste into something that can have added value, including converting plastic waste into alternative energy sources in the form of fuel. Handling of plastic waste can be done by recycling it by heating it in a reactor so that it becomes liquid oil, then the oil is purified using a distillation apparatus. This study aims to determine the performance of oil refining distillation equipment from the processing of Low Density Polyethylene (LDPE) plastic waste which can be used as fuel. The research method used is the performance test for refining oil from the processing of plastic waste which is heated with a distillation apparatus. Testing the plastic oil purification distillation apparatus was carried out 5 times, the test was carried out by means of each oil being put into the reactor totaling 3,500ml each time of testing, from the observations it showed that the results of tests 1 to 5 produced refined oil 1 = 1,592ml, 2 = 1.627ml, 3 = 1.609ml, 4 = 1.616ml, 5 = 1.319ml. The total amount of refined oil is: 7,768ml and the average temperature of the reactor is 184.6oC.
KAJIAN EKSPERIMEN PENGARUH DIAMETER PLUNGER POMPA INJEKSI BAHAN BAKAR PADA PERFORMA DAN GAS BUANG MESIN DAIHATSU TAFT DIESEL DL62
Authors: Dewanto Joni , Sutrisno Teng , Wardana Nicolas G. W.
Published: May 2023

For classic car lovers, the appearance of the Daihatsu Taft in the nineties was no less interesting than today's SUVs. However, the power is not comparable, because the Daihatsu Taft diesel engine still uses old technology. This research is an attempt to improve the performance of old diesel engines, which do not use common rail systems. Specifically, to determine the effect of modifying the size of the plunger of the fuel injection pump, on engine power and torque, fuel consumption and exhaust gas opacity. The analysis was carried out through a comparative study of the performance of standard machines and machines with modified plunger sizes I and II which were larger than the standard plunger diameter. Testing the performance of the machine using a Dastek Dynamometer 2WD Plate Roller. The results showed that the larger the plunger diameter of the injection pump, the effect of increasing power, torque, fuel consumption rate and exhaust gas opacity as well as the efficiency of the Daihatsu Taft DL62 diesel engine. The increase in exhaust gas opacities of modified engines does not exceed and is still far below the maximum threshold according to the Regulation of the State Ministry of Environment No. 5 of 2006 concerning Thresholds of Exhaust Emissions of Old Motor Vehicles. The emission test method uses ISO 11614
El ‘Llibre de la fundació de Sant Jeroni de Cotalba’ (1569) de fra Joan Baptista de Salamanca
Authors: Galera Hernández Rubén
Published: May 2023

L’Orde de Sant Jeroni ha produït llibres, al llarg de la història, que relaten la fundaciódels seus monestirs. La llengua emprada en aquest tipus de produccions historiogràfiquesha sigut majoritàriament el castellà, fins i tot en els monestirs de la Corona d’Aragó. La troballafortuïta del cronicó fundacional del monestir de Sant Jeroni de Cotalba dona compteque aquest cenobi, juntament amb el monestir de la Murtra (Badalona), es va mantenir fidelal català en aquest tipus de projectes cronístics. Partint d’aquest fet, en el present treballanalitzarem el cronicó Fundació del monestir de Sant Jeroni de Cotalba, escrit per fra JoanBaptista de Salamanca en 1569, i totes les dades i dates anacròniques que posen en dubte laseua datació i l’autoria.