Miracle-dz/UniFAR-FTUs huggingface dataset:
A Comparative Study on Tensile Strength, Hardness, and Microstructure at ST.42 Steel Plate Welded with Electric and Acetylene Welding

This study aims to determine the physical and mechanical properties of the steel plate welded ST.42 after using electric and acetylene welding. It is also to know the difference in tensile strength, hardness, and microstructure on ST.42 steel plate welded in both welding process. The research data was obtained with experimental methods by comparing the tensile strength, hardness, and microstructure for both welding process and was tested by using universal testing tool such as Vickers hardness test and digital microscope. Data were analyzed with descriptive statistics and inferential statistics. The object of this study was ST.42 steel available in the market. Results of the data analysis showed that there is no significant difference between the tensile strength, Vickers hardness numbers, and the microstructure of the steel grain pearlite and ferrite results for both electric and acetylene welding on steel plate ST.42. The magnitude of the tensile strength of electric welding had maximum tensile strength of 361.1460 kg/mm2 with a maximum tensile force of 115.5667 N. The amount of tensile strength through Oxyacetylene welding had a maximum tensile strength of 58.2500 kg/mm2 with a maximum tensile force of 18.6400 N. The magnitude of Vickers hardness number of electric welding was in average of 936.5443 HV. On the other hand, Vickers hardness number of Oxyacetylene was in average of 902.5220 HV. The results of microstructure through electric welding were 66.8496 μm for steel grain pearlite and 29.3485 μm for steel grain pearlite. The amount of those of Oxyacetylene welding were 58.5267 μm for steel grain pearlite and 29.3585 μm for grain ferrite steel. Keywords—tensile strength; hardness; microstructure; electric; acetylene welding
A Phantom Material for Mri of the Neonatal Brain

Studies [1-3] have shown that magnetic resonance imaging (MRI) techniques can be used to noninvasively investigate the impact of premature birth on early brain development, and to provide prognostic indicators of neuro-developmental outcome. Optimization (at a given field strength) and adaptation of relevant MRI sequences developed for adults need substantial revision because the relaxation times (T1 and T2) of neonatal brain tissues [4] differ greatly from those of adults and children. Image constrast and information is largely determined by T1 and T2. Experimental testing of these MRI techniques would be useful, not only for optimizing contrast, but also for exploring the influence of imaging parameters on the efficacy of image processing techniques such as segmentation. However, performing optimization of MRI sequences on human neonates is not ethically appropriate. Also, animal models with appropriate relaxation times and morphology are not easily available. Digital phantoms would also not be optimal because of the difficulties associated with accounting for “non-ideal” signal behaviour from various sources (e.g. imperfect spoiling, eddy currents, non-uniform static and radio-frequency magnetic fields). Thus, a realistic phantom to mimic both the MR parameters (T1 and T2) and morphological features of the neonatal brain would be a valuable tool.
Implicit Active Contour Model with Local and Global Intensity Fitting Energies

We propose a new active contour model which integrates a local intensity fitting (LIF) energy with an auxiliary global intensity fitting (GIF) energy. The LIF energy is responsible for attracting the contour toward object boundaries and is dominant near object boundaries, while the GIF energy incorporates global image information to improve the robustness to initialization of the contours. The proposed model not only can provide desirable segmentation results in the presence of intensity inhomogeneity but also allows for more flexible initialization of the contour compared to the RSF and LIF models, and we give a theoretical proof to compute a unique steady state regardless of the initialization; that is, the convergence of the zero-level line is irrespective of the initial function. This means that we can obtain the same zero-level line in the steady state, if we choose the initial function as a bounded function. In particular, our proposed model has the capability of detecting multiple objects or objects with interior holes or blurred edges.
Modeling the Black Hole Recoil from the Nucleus of M83

GEMINI + GMOS and Chandra emission-line spectroscopy reveal that the Fanaroff-Riley II radio-source J133658.3-295105 is a local object behind the barred-spiral galaxy M83 that is projected onto the galaxy’s disk at about 60" from the galaxy’s optical nucleus. J133658.3-295105 and its radiolobes are aligned with the optical nucleus of M83 and two other radio-sources neither of which are supernova remnants or HII regions. The optical nucleus of M83 is off-centered by 2.7" (≈60 pc) with regard to the kinematic center. Its mass is within the range (1 -4) × 106 and the velocity dispersion at its center points to a non-resolved mass concentration of ≤106 . In this paper we study the circumstances in which the radio source would have been ejected from the central region of M83. We analyze different types of collisions of binary and triple systems of super-massive black holes (SMBHs) by numerical simulations using a Post-Newtonian approximation of order 7/2 (~1/c7). We developed an N-body code specially built to numerically integrate the Post-Newtonian equations of motion with a symplectic method. Numerical experiments show that the code is robust enough to handle virtually any mass ratio between particles and to follow the interaction up to a SMBH separation of three Schwarzschild radii. We show that within the current Post-Newtonian approximation, a scenario in which one of the three SMBHs suffers a slingshot-like kick is best suited to explain the ejection of J133658.3-295105, which simultaneously produces the recoil of the remaining BH pair, which drags together a subset of stars from the original cluster forming a structure that mimics the off-center optical nucleus of M83. The simulation parameters are tuned to reproduce the velocities and positions of J133658.3-295105 as well as the optical nucleus and the putative SMBH at its center.
Polycyclic aromatic hydrocarbon processing in interstellar shocks

Context. PAHs appear to be an ubiquitous interstellar dust component but the effects of shocks waves upon them have never been fully investigated. Aims. We study the effects of energetic (≈0.01−1 keV) ion (H, He and C) and electron collisions on PAHs in interstellar shock waves. Methods. We calculate the ion-PAH and electron-PAH nuclear and electronic interactions, above the threshold for carbon atom loss from a PAH, in 50−200 km s −1 shock waves in the warm intercloud medium. Results. Interstellar PAHs (NC = 50) do not survive in shocks with velocities greater than 100 km s −1 and larger PAHs (NC = 200) are destroyed for shocks with velocities ≥125 km s −1 . For shocks in the ≈75−100 km s −1 range, where destruction is not complete, the PAH structure is likely to be severely denatured by the loss of an important fraction (20−40%) of the carbon atoms. We derive typical PAH lifetimes of the order of a few ×10 8 yr for the Galaxy. These results are robust and independent of the uncertainties in some key parameters that have yet to be well-determined experimentally. Conclusions. The observation of PAH emission in shock regions implies that that emission either arises outside the shocked region or that those regions entrain denser clumps that, unless they are completely ablated and eroded in the shocked gas, allow dust and PAHs to survive in extreme environments.
Title Minimally invasive treatment of oligometastasis in the liver inrecurrent nasopharyngeal carcinoma

Objective: The principle of management of patients with oligometastasis is evolving. The current study aims to investigate theefficacy of percutaneous radiofrequency ablation (RFA) of the solitary liver metastasis after previous radiotherapy for nasopharyngeal carcinoma (NPC). Methods: A pilot study involving 4 patients with biopsy proven solitary liver metastasis from NPC. After creation of artificial ascites, cooltip RFA needle was inserted into the intra-hepatic tumor under ultrasound guidance. Procedure related complications were noted and patients were followed up regularly and indefinitely for oncological outcome. Results: All patients had locoregionally advanced NPC at initial diagnosis and were treated with concurrent chemoradiation. Complete response was achieved in all patients. The mean time to tumor recurrence was 21.3 months. The mean size of the liver tumor was 3.5cm. Two patients had synchronous local tumor recurrence, and they underwent nasopharyngectomy and neck dissection before receiving treatment to the liver. Percutaneous RFA was performed in all patients. The mean hospital stay was 2.2 days and no procedure related complications were detected. No systemic treatment was given afterwards. The mean follow-up interval was 40.5 months. One of the patients developed progression of disease and died at 13 months after RFA, while the rest of the patients were alive and
Improvement of Gene Expression Studies in the DimethylnitrosamineInduced Liver Fibrosis Model in the Rat Using Selected Reference Genesfor Quantitative Real Time-PCR Analysis

Background: Liver fibrosis is a reaction to chronic liver injury characterized by excessive accumulation of collagen. Due to their importance as biomarkers, the changes in gene expression in the liver during the development of fibrosis and its subsequent outcomes of cirrhosis, neoplasia or resolution are intensely studied. Quantitative realtime PCR (qPCR) with its ability to detect and measure minute amounts of nucleic acids have been increasingly used in these studies. In qPCR, the quantitation of mRNA is relative and the accuracy of results dependent on the reference genes used for standardization. However, many genes studied are normalized against single reference genes, usually housekeeping genes, without adequate justification. Methods: For the dimethylnitrosamine (DMN) induced liver fibrosis rat model, we tested 8 commonly used candidate genes (Actb, Alb, Sdha, B2m, Rn18s, Hprt1, Ppia and Gapdh) to determine their suitability as reference genes. qPCR results were analysed using four commonly used programs; NormFinder, GeNorm, Comparative ΔCt methods and BestKeeper. Result: It was determined that Gapdh and B2m were the most stable genes in normal liver. However, in DMN treated livers, Gapdh and Ppia were the most stably expressed reference genes. We validated these reference genes by using them to normalize the expression of four genes; Tgfb 1, Col1a1, Col3a1 and Tnf known to be highly expressed in liver fibrosis. Conclusion: Gapdh and Ppia are the most suitable reference genes for the normalization of qPCR data in gene expression studies of the liver in the DMN induced liver fibrosis model in the rat. We advise against the use of Actb in this experimental setting because of its low expression stability.
Applying microservice architecture pattern to a design of an MMORPG backend

Massively multiplayer online role-playing game (MMORPG) is a game genre which allows thousands of people to connect and role-play in a virtual world. Typically, these games are experienced by controlling an in-game character which properties, such as name, race and skills can be customized. Hence, a big part of these games is about progression through quests and combat, because unlike FPS games, MMORPGs allows players to create characters which lasts between different gaming sessions. However, very little is known how these games are implemented in practice. The objective of this master’s thesis is to study how MMORPG backend can be designed using the microservice architecture pattern? In this context, MMORPG backend means a server-side game system which needs to be in place for thousands of people to connect and role-play in a same or separate instances of a virtual world. On the contrary, an application based on the microservice architecture pattern means a distributed system which is composed by a set of services, each of them designed to perform separate and well-defined task. The research was conducted with design science research methodology. Consequently, the search problem was approached by building a proof of concept implementation of an MMORPG backend which was developed according to principles of a microservice architecture pattern. These principles along the requirements of the system were derived from the existing literature because the research was not conducted in a company setting. The knowledge base of this research was the existing work towards designing MMORPG architectures, and the studies describing microservice architecture pattern in more detail. The developed system was rigorously evaluated by comparing the design against the principles, and the functionality against the requirements using three different test strategies: unit testing, service testing and end-to-end testing. From the results of the evaluation, and the process of developing the system, the research problem could be addressed. The results showed that there are multiple steps in the process of designing an MMORPG backend using the microservice architecture pattern, but the requirements engineering is the most important. Having a detailed understanding about the game requirements makes it possible to construct a distributed system in which multiple microservices works together to serve player goals. Hence, the architectural design developed in this research helps game developers to construct their very own MMORPG backend.
Practical Usability Problems in Business Economics

The practical usability of research results is a special advisory function of business economics. Of great importance is in teaching the science-based business knowledge as well. The paper presents the main problems related to practical usability of business economics summarizing more than four decades of research results of the author on this aspect. The examined disciplinary problems are the questions of terminology, some mechanical takeovers from microeconomic topics, some financial decision-making recommendations based on so methodology which does not fit for actual practice, and finally scientifically unresolved issues originating within business economics. Among the latter are: some unclear relations of profitability indicators, product ranking by contribution margin ratios, problematic return requirement sharing for products by cost or price proportions, cost-related cross-sectional analysis and some methodological problems of project evaluation. Clarifying these questions is fundamental for professional education. This is also important for business economists and in particular small and medium-sized enterprises, since their opportunities for in-depth methodological research are very limited.
Distributed Compressive Data Gathering Framework for Correlated Data in Wireless Sensor Networks

In wireless sensor network existing spatial (inter) and temporal (intra) correlation causes redundant data in the network. Exploiting the existing spatial (inter) and temporal (intra) correlation to effectively compress data thereby reducing redundancy to reduce data traffic in network is of prime concern. In this paper, we propose a 2-D distributed compressive data gathering framework to reduce redundancy in sensor network data. We also analyze the performance of the proposed scheme with random DCT and DFT measurement matrices on real data sets of sensor readings with different sparsity. Results indicate that high compression can be achieved with negligible mean square error in recovery from far fewer number of samples than the traditional Nyquist rate at the sink thereby enhancing network life time to large extent in large scale wireless sensor networks. Also, the recovery performance improves depending upon the sparsity measure and the measurement matrices used for compressing the data.
Web Application Performance Analysis Based on Component Load Testing

Performance of many web sites depends on the load on the site at peak time under varying conditions. Performance testing is normaly conducted in a reseanobly simulated environment with the help of performance testing tools. However , performance of a website depends on various parameters and each parameter must be tested under varying stress lavels. It is not possible to draw a common denominator for performance parameters to test the websites due to complexity of websites. Different parts of the websites must be testet with different parameters under varying condition and stress lavel. In such circumstances, it is necessary to decompose the websites in to many components , which represents the behavior of various business components. These business components are mapped to various objects that trulely represent the behavior and structure of the part of the website. These object are subjected to performance testing with different parameters and stress levels . This paper addresses the new testing process, which uses the concept of decomposing the behavior of the web Application into testable objects. These testable objects are subjected to performance testing under varied performance parameters and stress levels.
The Effect of the Graphic Organizer Strategy on University Students’ English Vocabulary Building

This study aimed at investigating the effect of the graphic organizer strategy on vocabulary building and vocabulary incremental growth of Jordanian university EFL students. One hundred and two students participated in the study which lasted for one academic semester of four months. Each student enrolled in one of two intact and equally-sized classes of a general English Language course. One of the classes was assigned to an experimental group, whose students were taught eight specific features of vocabulary items using the GO strategy. The eight features were the word’s spelling, pronunciation, part of speech, meaning in the first language, meaning in the foreign language, synonym, antonym and using it in an example sentence. The other class was assigned to a control group, whose students were taught the same vocabulary items using traditional instruction. A pre-test and a post-test were administered to all students whose responses were analyzed using adjusted means, standard errors and an ANCOVA. Results revealed that the experimental group students outperformed those students in the control group concerning their vocabulary building. To decide whether the GO strategy had an incremental growth in students’ vocabulary building, students of both groups sat for three separate evaluative tests. Students’ responses were analyzed using Microsoft Excel sheets and results showed that this strategy significantly improved students’ vocabulary growth over time.
Design of low-dropout voltage regulator

This thesis is focusing on design of low dropout voltage regulator (LDO) in general and on designing a specific LDO regulator to satisfy the given requirements. The preliminary chapters are dealing with the basic blocks such as error amplifier, pass transistor and with parameters of the LDO regulator such as line regulation load regulation etc. Basic design parameters of CMOS technology devices are presented after. Circuit is designed with emphasis on low quiescent current and dropout voltage, while stability is paramount. In last chapter, measurement results of parameters are presented and also corner analysis. The final LDO design achieves very low quiescent current in the range of microamperes.
HAFIZ M. AITZAZ HASSAN SEMANTIC MODELS AND STATE TRACKING FOR PLUG & PRODUCE IN AUTOMATION SYSTEMS

HAFIZ M. AITZAZ HASSAN: Semantic Models and State Tracking for Plug & Produce in Automation Systems Tampere University of technology Master of Science Thesis, 50 pages, 06 Appendix pages March 2018 Master’s Degree Program in Automation Engineering Major: Factory Automation and Industrial Informatics Examiners: Professor Dr. Jose L. Martinez Lastra, Associate Professor Dr. Andrei Lobov Supervisors: Dr. Andrei Lobov, Dr. Sten Grüner, Dr. Johannes O. Schmitt
Assessment of knowledge and risk factors of hypertension among school teachers in a selected district in North Central Province of Sri Lanka

Background: Hypertension is a major public health problem in developing countries including Sri Lanka. Prevalence of hypertension in Sri Lanka in 2014 was 21.2%. Studies indicate that work related risk factors are causative agents in the development of hypertension and school teachers are more vulnerable to develop hypertension due to the above mentioned risks.
MAGNETIC MATERIAL CHARACTERIZATION BY OPEN SAMPLE MEASUREMENTS

Correction of experimental data. The paper analyzes the significance of the experimental magnetic characteristic obtained by open sample measurement (e.g. by a vibrating sample magnetometer). It is outlined the influence of the open magnetic circuit shape, the sample shape and magnetic properties, and the equipment setup (e.g. the probe position in the air-gap). It is shown how one could obtain the material characteristic from the sample characteristic. Numerical design of electromagnetic devices involves mathematical models of the magnetic material relationship. These models could be linear/ non-linear/ hysteretic, scalar/vector or isotropic/anisotropic. The model identification requires experimental data obtained by various measurement techniques [1]. Each experimental method has specific limitations, regarding the magnetic field range, sample shape, measured magnetic parameters etc. A class of versatile magnetic measurements uses open magnetic circuits, with a variable air-gap, which allows measuring magnetic samples of different sizes or shapes. But, such of methods give us only an external magnetic relationship between the applied magnetic field and a magnetic magnitude (magnetic moment, magnetic flux density or magnetization) that characterizes the entire sample. A numerical model of the magnetic material constitutive relationship, which could be used in a numerical solving of the magnetic field problems, involves an internal relationship. The transformation of the measured external dependence into the material intrinsic relationship is a difficult problem.
Quantifying the Mass Balance of Ice Caps on Severnaya Zemlya, Russian High Arctic. II: Modeling the Flow of the Vavilov Ice Cap under the Present Climate

Abstract To understand how ice masses in the Russian High Arctic respond to climate change, the processes that influence their current mass balance must be evaluated. A mass balance model was coupled with an ice-flow model to determine the influence of the present climate regime on the dynamics of the Vavilov Ice Cap, October Revolution Island, Severnaya Zemlya. Model results show that the bulk of the ice cap is flowing relatively slowly, at a velocity of around 5 m a−1. However, the climate regime encourages the ice cap to migrate toward the precipitation source in the southwest. The ice cap may not, therefore, be in equilibrium with the present climate. Given that the response time of the ice cap is of the order of 1000 years, this non-equilibrium may be related to changes in climate that occurred during the Little Ice Age, when the ice cap may have been north of its present position.