Miracle-dz/UniFAR-FTUs huggingface dataset:
Data space dimensionality reduction in the problem of diagnosing a thyroid disease

Analysis of a set of data space dimensionality reduction methods in image recognition problems is carried out. A problem of diagnosis of thyroid diseases with the use of images of cytological preparation is investigated. It is shown that the morphological image analysis combined with the method of diffusion maps makes it possible to obtain a higher recognition accuracy in the problem of diagnosis of a thyroid disease than with the previously proposed method based on the Fourier correction spectrum and selection of principal components.
Ayucitra: POTENSI SENYAWA FENOLIK

Antioksidan adalah substansi yang dapat menghambat atau mencegah proses oksidasi pada substrat yang mudah teroksidasi (bahan makanan yang mengandung karbohidrat, protein, dan lemak) jika ditambahkan pada konsentrasi rendah. Berdasarkan sumbernya, antioksidan dapat dibedakan menjadi dua, yaitu antioksidan sintetis dan antioksidan alami. Antioksidan sintetis yang dikenal sebagai antioksidan paling efektif untuk minyak nabati adalah tert-butyl hydroquinon (TBHQ), sedangkan antioksidan alami umumnya diperoleh dari senyawa fenolik atau polifenol tumbuhan yang dapat berupa golongan flavonoid, turunan asam sinamat, tokoferol, dan lain-lain. Tujuan dari penelitian ini adalah mempelajari potensi senyawa fenolik bahan alam sebagai antioksidan alami minyak goreng kelapa sawit. Senyawa fenolik diperoleh dengan cara mengekstrak tongkol jagung dan kulit petai dengan menggunakan pelarut etanol. Ekstrak fenolik yang diperoleh selanjutnya diaplikasikan dalam simulasi proses penggorengan dengan minyak goreng kelapa sawit dan dibandingkan dengan simulasi penggorengan di mana ditambahkan antioksidan sintetis TBHQ. Hasil penelitian menunjukkan bahwa antioksidan alami ekstrak tongkol jagung dan kulit petai dapat menghambat oksidasi pada minyak goreng kelapa sawit selama proses penggorengan berlangsung. Antioksidan alami dari kulit petai mampu mengurangi nilai PV lebih besar dibandingkan dengan antioksidan sintetis TBHQ, demikian pula halnya dengan nilai p-AnV. Penambahan ekstrak fenolik pada minyak dapat meningkatkan kadar FFA, namun peningkatan ini masih memenuhi syarat SNI untuk minyak goreng.
A VAR Model for the Analysis of the Effects of Monetary Policy in the Euro Area

This paper, by the estimation of a structural VAR model on aggregate data from 1980 to 2002, examines the macroeconomic effects of an unexpected change in monetary policy on the euro area. The results are in line with the economic theory and they are close to the one estimated by other authors. These results, considering the formation of the European Monetary Union, give rise to some doubts and require some considerations. Thus, this paper discusses the limits of both the econometric technique used, and the data compilation methodology usually applied in these works.
Effects of heterogeneous soil‐water diffusivity on vegetation pattern formation

Many mathematical models have been proposed to explain the emergence of vegetation patterns in arid and semiarid environments, but only a few of them take into account the heterogeneity in the system properties. Here we present a rigorous study of the effects of heterogeneous soil‐water diffusivity on vegetation patterns, using two mathematical models. The two models differ in the pattern‐forming feedback that they capture; one model captures the infiltration contrast between vegetated and bare‐soil domains, whereas the other model captures the increased growth rate of denser vegetation due to an enhanced ability to extract water from the soil. In both models, the most significant effect of the heterogeneity on the soil‐water diffusivity is the increased durability of patterned vegetation to a reduced precipitation rate. An additional effect is that the heterogeneity makes the desertification process, namely, the transition from a spotted vegetation pattern to a bare‐soil state, more gradual than in the homogeneous system. Our findings suggest that the heterogeneity cannot be neglected in the study of critical transitions in heterogeneous ecosystems and, particularly, in the study of the desertification process due to climate changes or anthropogenic disturbances.
The Assessment of Convergence in the EU Using the Optimum Currency Area Index

Structural convergence is a crucial requirement of functioning economic and monetary integration in the European Union (EU). It can be overall examined using the Optimum Currency Area (OCA) index. The OCA index can be used as a tool for assessing the possibilities of successful working of countries in the single currency area and can help to avoid some negative effects of entering unsuitable countries to euro area. However, it is also used to assess the level and development of structural convergence in the EU in general. It can be then interpreted as a “level of convergence or variability” of particular EU country in relation to comparative economy. The OCA index is computed for EU members using panel regression in the period 1999-2009. Particular components of OCA index are also important factors of convergence. Other factor that is able to influence the development of the OCA index is the hypothesis of endogeneities of OCA. External shocks have influence on convergence and development of OCA index as well. There arises the necessity to assess the euro area entry possibilities of non-members carefully due to problems of current euro area. Countries can benefit from participation in euro area. The most important longterm impact of deepening integration and particularly euro area membership is the impact on economic growth. However, the level of structural convergence can be crucial for it. The aim of this paper is using the OCA index to assess the convergence in terms of OCA in the EU and describe aspects of global financial crisis for convergence process as well.
Effect of absorbing layer thickness on efficiency solar cells based on Cu(In,Ga)(S,Se)2

On the basis of one-dimensional model of the solar cell (SC) the influence of photoactive layer thickness on the photocurrent (a key parameter for the collection efficiency of photogenerated charge carriers) of a has been studied. It is shown that for a typical Cu(In,Ga)(S,Se)2 - based SC the optimal value of the photoactive layer thickness is about 1.5 m. Reducing the thickness of the photoactive layer leads to a sharp decrease in the photocurrent and increase the series resistance. Streszczenie. Na podstawie jednowymiarowego modelu ogniwa slonecznego zbadano wplyw grubości warstwy fotoaktywnej na natezenie fotoprądu (parametru kluczowego dla ustalania sprawności fotogenerowanych nośnikow ladunku). Wykazano, ze dla typowych ogniw slonecznych opartych o Cu(In,Ga)(S,Se)2 optymalną wartością grubości warstwy fotoaktywnej jest w przyblizeniu 1,5 m. Redukując grubośc warstwy fotoaktywnej doprowadzono do gwaltownego spadku wartości fotoprądu i wzrostu rezystancji szeregowej. (Efekt absorbcji grubości warstwy na sprawnośc ogniw slonecznych na bazie Cu(In,Ga)(S,Se)2).
Potential Radioprotective Effect of AT1 Receptor Antagonists Against Morphological and Ultrastructural Changes in the Testes Induced by Ionizing Radiation

Radiotherapy is a source of human exposure to ionizing radiation. This pure energy causes deleterious effects on tissues, which result from oxidative stress, a phenomenon in which there is the participation of the Renin-Angiotensin System ( RAS). The male genital organs are extremely radiosensitive and the action of radiation in the testes can significantly affect spermat ogenesis. In search of potential radioprotective for male genital system, this study investigated whether the AT 1 ec ptor antagonists minimize radiationinduced damage to reproductive tissues, by decreasing oxidative stress. Male Wistar rats were divided into six groups: 0 Gray ( Gy) (control), 5 Gy (single dose in the scrotal area), telmisartan, losartan, 5Gy+telmisartan and 5Gy+losartan. The treatment start ed the day after irradiation with losartan 34 mg/kg (two times/day) and telmisartan 12 mg/kg (one time/day) during 60 days. For ultrastruc t ral analysis, the testis fragments were fixed in 2 % glutaraldehyde and 4 % paraformaldehyde in 0.1 M phosphate buffer, pH 7.3. The material was postfixed for 2 h in 1 % osmium tetroxide. For collagen evaluation, the sections were stained with Picrosirius-red method. Serum testosterone was determined. The date showed the deleterious effects of gamma radiation on testicular ultrastructure. Ric h accumulation of collagen fibers in the interstitium was observed in the irradiated groups, especially the irradiated and nontre te testes. No significant difference was detected in serum testosterone concentration among the studied experimental groups. Treatments wi th telmisartan and losartan influenced the onset of attenuation on ultrastructural damages arising from ionizing radiation. Althou gh the data strongly suggest that AT 1 receptor antagonists may promote radioprotection to the testes, further studies with a longer duration of treatment are required for these potentially positive effects to be maximized and, therefore, to better characterize radioprote ction to reproductive parameters.
A Novel Re-Targetable Application Development Platform for Healthcare Mobile Applications

The rapid enhancement of central power unit CPU performance enables the development of computationally-intensive healthcare mobile applications for smartphones and wearable devices. However, computationally intensive mobile applications require significant application development time during the application porting procedure when the number of considering target devices operating systems OSs is large. In this paper, we propose a novel retargetable application development platform for healthcare mobile applications, which reduces application development time with maintaining the performance of the algorithm. Although the number of applications target OSs increases, the amount of time required for the code conversion step in the application porting procedure remains constant in the proposed retargetable platform. Experimental results show that our proposed retargetable platform gives reduced application development time compared to the conventional platform with maintaining the performance of the mobile application.
Microencapsulation of Peppermint ( Mentha piperita and Mentha Spicata ) Essential Oil by Spray-Dryer

Öz Bu çalışmada yaygın kullanım alanlarına sahip olan nane (Mentha piperita ve Mentha spicata) esansiyel yağlarının mikroenkapsülasyon olanakları araştırılmış ve mikroenkapsülasyon için gerekli olan kaplama materyallerinin oranını belirlemede optimizasyon işlemi gerçekleştirilmiştir. Mentha spicata esansiyel yağı deneme tasarımı için 4 adet cevap (verim, etkinlik, esansiyel yağ hapsetme etkinliği ve Hausner oranı) sistemin optimize edilmesinde kullanılmıştır. Optimizasyon işlemi sonuçlarına göre maltodekstrinarap zamkı kombinasyonunun (%62-38) ve %100 arap zamkı kullanımının nane (Mentha piperita ve Mentha spicata) esansiyel yağları mikroenkapsüle etmek için optimum noktalar olduğu belirlenmiştir. Yapılan analizler sonucunda duvar materyalinin oranına ve esansiyel yağın elde edildiği nanenin türüne göre verim, etkinlik, esansiyel yağ hapsetme etkinliği, Hausner oranı, Carr indeks, ıslanabilirlik (sn) ve su aktivitesi değerlerinin değişkenlik gösterdiği görülmüştür. Bu verilerin ışığı altında maliyeti günden güne artan arap zamkı kaplama maddesinin kullanımını azaltıcı olarak maltodekstrin-arap zamkı kombinasyonları için optimum noktalar belirlenmiştir.
Domestic Competition and Foreign Direct Investment In Unionized Oligopolyenter

It is often argued, though mostly informally, that outward foreign direct investment (FDI) is a synonym for the export of employment and thus detrimental to the home economy. To see whether and under what conditions this intuition indeed holds true, we construct a model of unionized duopoly and examine welfare implications of outward FDI by paying special attention to the role of domestic competition. We find that the welfare effect of FDI is largely non-monotonic, and there are indeed such things as "excessive FDI. " We also show that, when FDI reduces welfare, this negative effect arises more at the expense of consumers rather than the unions: in fact, quite contrary to the popular belief, FDI may actually benefit the unions because it serves to soften price competition between them. The paper points out that welfare effects of outward FDI hinges crucially on the nature of domestic competition, and policymakers must carefully take this aspect into consideration.
A Machine Learning Model to Detect Malware Variants

For a piece of malware to be able to do its intended malicious act ivity, it has to be able to sneak inside a machine’s system without being flagged by cybersecurity defenses. It camouflages and packages itself to look like a benign piece of code and, when it has cleared past security filters, unleashes its payload. When malware is difficult to discover — and has limited samples for analysis — we propose a machine learning [2] model that uses adversarial autoencoder and semantic hashing to find what bad actors try to hide. We, along with researchers from the Federation University Australia, discussed this model in our study t it led “Generative Malware Outbreak Detection [3]. ”
AutomAtic spelling correction for russiAn sociAl mediA texts

This paper describes an automatic spelling correction system for Russian. The system utilizes information from different levels, using edit distance for candidate search and a combination of weighted edit distance and language model for candidate hypotheses selection. The hypotheses are then reranked by logistic regression using edit distance score, language model score etc. as features. We also experimented with morphological and semantic features but did not get any advantage. Our system has won the first SpellRuEval competition for Russian spell checkers by all the metrics and achieved F1-Measure of 75%.
INTEGRATED DESIGN AND CONTROL USING THE DYNAMIC SIMULATION OF A REVERSE OSMOSIS PLANT

This document presents the optimal design of a desalination plant using the dynamic simulation of a reverse osmosis plant. Predictive control is normally used to calculate the operating point. However, this operating point, as well as the plant design, can be improved with an integrated design, mainly regarding the size of the equipment. The main purpose of this plant control is to supply the water demand (which varies throughout the day and is different throughout the year) with the least amount of energy, avoiding the draining and spillover of the tanks and taking into account a series of system restrictions, such as the need to clean the filters or membranes or the technical limitations of the pumps. This document will show how an integrated design improves the design and the control of a specific plant. The EcosimPro© modelling tool has been used to develop the dynamic simulations of the desalination plant in the study.
Numerical computation and investigation of the characteristics of microscale synthetic jets

A synthetic jet results from periodic oscillations of a membrane in a cavity. Jet is formed when fluid is alternately sucked into and ejected from a small cavity by the motion of membrane bounding the cavity. A novel moving mesh algorithm to simulate the formation of jet is presented. The governing equations are transformed into the curvilinear coordinate system in which the grid velocities evaluated are then fed into the computation of the flow in the cavity domain thus allowing the conservation equations of mass and momentum to be solved within the stationary computational domain. Numerical solution generated using this moving mesh approach is compared with an experimental result measuring the instantaneous velocity fields obtained by µPIV measurements in the vicinity of synthetic jet orifice 241 µm in diameter issuing into confined geometry. Comparisons between experimental and numerical results on the streamwise component of velocity profiles at the orifice exit and along the centerline of the pulsating jet inmicrochannel as well as the location of vortex core indicate that there is good agreement, thereby demonstrating that the moving mesh algorithm developed is valid.
AN EFFICIENT SPECTRAL CLUSTERING ON SOCIAL NETWORK UNSTRUCTURED DATA FOR IMPROVED CLUSTERING ACCURACY

The paper concentrated to develop a scalable and efficient spectral clustering algorithm. It operates on big data processing in orientation of data mining approaches . Data is obtained from sensors, media sites, social media et c. A required big data is collected to find interesting patterns using data mining approaches. We collected from user links suc h as replies, posting, and retweets. We propose a probability mod el of the mentioning behavior of a social network user, to de t ct the emergence of a new topic from the anomalies measure d through the model. Aggregating anomaly scores from hundreds of user shows an emerging topics only based on the reply/me ntion relationships in social-network posts. The experime nts show that the proposed mention-anomaly-based approaches can d etect new topics at least as early as text-anomaly-based appr oaches, and in some cases much earlier when the topic is poorly id entified by the textual contents in posts in Laplacian matrix.
Layer‐Controlled and Wafer‐Scale Synthesis of Uniform and High‐Quality Graphene Films on a Polycrystalline Nickel Catalyst

Chemical vapor deposition (CVD) provides a synthesis route for large‐area and high‐quality graphene films. However, layer‐controlled synthesis remains a great challenge on polycrystalline metallic films. Here, a facile and viable synthesis of layer‐controlled and high‐quality graphene films on wafer‐scale Ni surface by the sequentially separated steps of gas carburization, hydrogen exposure, and segregation is developed. The layer numbers of graphene films with large domain sizes are controlled precisely at ambient pressure by modulating the simplified CVD process conditions and hydrogen exposure. The hydrogen exposure assisted with a Ni catalyst plays a critical role in promoting the preferential segregation through removing the carbon layers on the Ni surface and reducing carbon content in the Ni. Excellent electrical and transparent conductive performance, with a room‐temperature mobility of ≈3000 cm2 V−1 s−1 and a sheet resistance as low as ≈100 Ω per square at ≈90% transmittance, of the twisted few‐layer grapheme films grown on the Ni catalyst is demonstrated.
Requirements Modeling Methodology Based On Knowledge Engineering: A Case Study of Railway Control System

The complexity of the verification and the validation of embedded systems is increasing. This paper explores the first requirements engineering processes in the solution domain, which are analysis and specification. In this work we present an architecture of a requirement specification system. We show how the requirements are analysed and structured to generate a dependency graph. This latter will serve to analyse requirements and to model specifications on goal model. In this paper we will focus on the analysis, and structuring processes. We will explain the requirement classification criteria. Keywords: Requirements Modeling, Qualification Strategy, Knowledge Engineering, Ontology, Dependency Graph, Embedded System, ERTMS/ETCS
Methodological Issues in the Study of Complex Systems

From an engeneering perspective, it is well known that numerous problems hamper the proper control and prediction of complex systems which are essential for the reproducibility of their behavior. In addition, it is not obvious how the concept of complexity ought to be understood within the tradition of physics and its epistemology. Both issues have important ramifications for complex systems in other discplines as well. Three outstanding topics in this regard are discussed. (1) Many definitions of complexity stress its difference from randomness and are fundamentally context-dependent rather than universal. (2) Complexity measures are often defined in information-theoretical terms, but extend the scope of pure syntax toward semantic and pragmatic dimensions. (3) Mathematical limit theorems, expressing the stability of a result, are often not straightforwardly applicable to complex systems.
People-, Process- and Goal-Focused Leadership Behaviour: An Empirical Study in a Global Company

This study explores the focus of leadership behaviours that perceived and experienced by leaders in a multinational company. By using triangulation method including questionnaires, in-depth interviews and observations, we analyse the data collected from twenty managers across organisational levels. The results reveal the patterns of managerial behaviour in three key focus areas for success: people, process and goal. Directors and general managers are more people-focused than line managers, who in turn tend to be more process-focused. The research findings bridge the gap in the field and initiate a new normative leadership behaviour model (people-, process and goal-focused), which can be used to directly support leaders in enhancing their leadership skills as well as for recruitment or promotion purposes. The model can be utilized as an aid to organisations when developing training programs to support leaders in different types of organisations (for-profit or non-profit) to focus their development efforts on organizational success.
Photo-oxidation of Water on the 3C-SiC Surface: A First-principles Study

Oxidation of water on the 3C-SiC(111) surface is studied using density functional theory calculations. A four-step oxidation reaction is investigated and a reaction energy landscape is modeled from the free energy of the reaction intermediates. The reaction is studied on the unreconstructed Si surface of the 3C-SiC, which in the (111) cleaving is composed of alternating layers of carbon and silicon atoms. Convergence tests were carried out, first on bulk structure and then on the slab, to obtain a suitable computational model. The results indicates that the photo-induced water oxidation reaction requires an additional potential of 0.47 V, which, if true would prevent the use of SiC as photoanode for this reaction. The limiting reaction intermediate is the formation of a bare surface site by desorption of HOO. The calculations suggests that this overpotential is caused by the high surface energy of the bare surface. However, by covering all sites that does not take part in the reaction with hydroxyl groups the overpotential was lowered with about 1 V. As the photoanode is in contact with water, a hydroxyl covered surface is actually a possible structure. Hence, the last result provides a possibility that the overpotential can come down to reasonably values. Future studies should focus on this finding.