Miracle-dz/UniFAR-FTUs huggingface dataset:
Comprehensive analysis of the dynamic behavior of grid-connected DFIG-based wind turbines under LVRT conditions

Power generation and grid stability have become key issues in the last decade. The high penetration of large capacity wind generation into the electric power grid has led to serious concerns about their influence on the dynamic behavior of power systems. The Low-Voltage Ride-Through (LVRT) capability of wind turbines during grid faults is one of the core requirements to ensure stability in the power grid during transients. The doubly-fed induction generators (DFIGs) offer several advantages when utilized in wind turbines, but discussions about their LVRT capabilities are limited. This paper presents a comprehensive study of the LVRT of grid-connected DFIG-based wind turbines. It provides a detailed investigation of the transient characteristics and the dynamic behavior of DFIGs during symmetrical and asymmetrical grid voltage sags. A detailed theoretical study supported by computer simulations is provided.
Evaluation of Delivery Techniques for Dynamic Web Content

The portion of web traffic attributed to dynamic web content is substantial and continues to grow as users expect more personalization and tailored information. Unfortunately, dynamic content is costly to generate. Moreover, traditional web caching schemes are not very effective for dynamically-created pages. In this paper we study two new acceleration techniques for dynamic content. The first technique is Edge-Side Includes (ESI), and the second is Class-Based Delta Encoding. To evaluate these schemes, we present a model for the construction of dynamic web pages. We use simulation to explore how system, page and algorithm parameters affect the performance of dynamic-content delivery techniques, and we present a detailed comparison of ESI and delta encoding in two representative scenarios.
Vztah silných stránek charakteru s životní a pracovní spokojeností učitelů a studentů pedagogiky

Výzkumna studie se zabýva aktualnimi tematy pozitivni psychologie. Hlavnim cilem bylo zmapovat zastoupeni silných stranek charakteru u ucitelů zakladnich skol a studentů pedagogiky a prozkoumat vztah mezi jejich silnými strankami charakteru a mirou proživane životni a pracovni spokojenosti. Výzkumný soubor tvořilo 150 slovenských ucitelů zakladnich skol a 132 vysokoskolských studentů pedagogiky. Silne stranky charakteru jsme zkoumali pomoci metody Signature Strengths Test (Seligman, 2011) a životni spokojenost prostřednictvim dotazniku Satisfaction With Life Scale (Diener a kol. 1985). Pracovni spokojenost ucitelů jsme zjisťovali inventařem Hodnoceni spokojenosti ucitelů (Paulik, 1999). Výsledky ukazuji, že množinu nejvýrazněji zastoupených silných stranek ucitelů i studentů shodně tvoři laska, laskavost, vděcnost, spiritualita a upřimnost. U obou souborů se vsak lisi pořadi těchto pěti charakteristických silných stranek. Ucitele a studenti se nelisi v miře životni spokojenosti, avsak jejich životni spokojenost je determinovana rozdilnými silnými strankami charakteru: S životni spokojenosti ucitelů statisticky významně souviseji charakterove přednosti spiritualita, laska, zvidavost, vděcnost a obezřetnost. U souboru studentů s životni spokojenosti statisticky významně koreluji spiritualita, vytrvalost, sebekontrola, naděje a vděcnost. Ve výzkumnem souboru ucitelů byl potvrzen pozitivni vztah mezi životni a pracovni spokojenosti.
Hubble Space Telescope Photometry of the Dwarf Spheroidal Galaxy ESO 410-G005

We present Hubble Space Telescope WFPC2 imaging of the nearby low surface brightness dwarf spheroidal galaxy ESO 410-G005, which has been resolved into stars for the first time. The resulting color-magnitude diagram for about 2500 stars shows a red giant branch with a tip at I = 22.4 ± 0.15 mag, which yields a distance of DMW = 1.9 ± 0.2 Mpc. ESO 410-G005 is found to be metal-poor with a mean metallicity of ⟨[Fe/H]⟩ = (-1.8 ± 0.4) dex estimated from its red giant branch. Upper asymptotic giant branch stars appear to be present near the center of the galaxy, indicative of a substantial, centrally concentrated intermediate-age population, unless these objects are artifacts of crowding. Previous studies did not detect ESO 410-G005 in Hα or in H I. Based on our distance estimate, ESO 410-G005 is a probable member of the Sculptor group of galaxies. Its linear separation from the nearest spiral, NGC 55, is 230 kpc on the sky. The deprojected separation ranges from 340 to 615 kpc depending on the assumed distance of NGC 55. The deprojected distance from the Sculptor group spiral NGC 300 is (385 ± 200) kpc. ESO 410-G005 appears to be a relatively isolated dSph within the Sculptor group. Its absolute magnitude, MV,0 = -12.1 ± 0.2 mag, its central surface brightness, μV,0 = 22.7 ± 0.1 mag arcsec-2, and its mean metallicity, [Fe/H] = (-1.8 ± 0.4) dex follow the trend observed for dwarf galaxies in the Local Group.
Cyclic brightening in the short-period WZ Sge-type cataclysmic variable SDSS J080434.20+510349.2

Aims. We observed a new cataclysmic variable (CV) SDSS J080434.20+510349.2 to study the origin of long-term variability found in its light curve. Methods. Multi-longitude, time-resolved, photometric observations were acquired to analyze this uncommon behavior, which has been found in two newly discovered CVs. Results. This study of SDSS J080434.20+510349.2 concerns primarily the understanding of the nature of the observed, doublehumped, light curve and its relation to a cyclic brightening that occurs during quiescence. The observations were obtained early in 2007, when the object was at about V ∼ 17.1, about 0.4 mag brighter than the pre-outburst magnitude. The light curve shows a sinusoidal variability with an amplitude of about 0.07 mag and a periodicity of 42.48 min, which is half of the orbital period of the system. We observed in addition two “mini-outbursts” of the system of up to 0.6 mag, which have a duration of about 4 days each. The “mini-outburst” has a symmetric profile and is repeated in approximately every 32 days. Subsequent monitoring of the system shows a cyclical behavior of such “mini-outbursts” with a similar recurrence period. The origin of the double-humped light curve and the periodic brightening is discussed in the light of the evolutionary state of SDSS J080434.20+510349.2.
Pathogenic and Protective Functions of TNF in Neuroinflammation Are Defined by Its Expression in T Lymphocytes and Myeloid Cells

TNF displays pathogenic activities in many autoimmune disorders. However, anti-TNF therapy in multiple sclerosis patients failed because of poorly understood reasons. We used a panel of gene-targeted mice that allowed cell-type specific ablation of TNF to uncover pathogenic and protective contributions of this cytokine during autoimmune disease of the CNS. T cells and myeloid cells were found to be critical cellular sources of TNF during experimental autoimmune encephalomyelitis (EAE). TNF produced by myeloid cells accelerated the onset of disease by regulation of chemokine expression in the CNS, driving the recruitment of inflammatory cells into the target organ. TNF produced by T cells exacerbated the damage to the CNS during EAE by regulating infiltration of inflammatory myeloid cells into the CNS. In secondary lymphoid organs, TNF expressed by myeloid cells and T cells acted in synergy to dampen IL-12p40 and IL-6 production by APCs, subsequently inhibiting the development of encephalitogenic T cell responses of Th1 and Th17 types. This dual role of TNF during EAE (protective in lymphoid organs and pathogenic in CNS) suggests that global TNF blockade might be inefficient in multiple sclerosis patients because augmented autoreactive T cell development in lymphoid tissues might overwhelm the beneficial effects resulting from TNF inhibition in the CNS.
A Process Tracing Study on Trust Formation in Recommendation Agents

This study utilizes a processing tracing method to explore the processes of trust formation in web-based productbrokering recommendation agents (RAs). We compare and contrast the processes of trust/distrust formation in an attribute-based RA (a typical content-based RA) versus a need-based RA (a content-based RA plus need-based questions). Concurrent verbal protocols from 49 subjects were collected, transcribed, and analyzed. Our protocol analysis results show that the need-based RA elicits significantly more trust formation processes and fewer distrust formation processes than the attribute-based RA does, which explains why the level of customer trust in the need-based RA is significantly higher than the level of customer trust in the attribute-based RA. Interestingly, our results show that, for both types of RAs, the top three processes of trust formations are different from the top three processes of distrust formations. Suggestions are given on how to design more trustworthy RAs.
The mechanism of cleavage of EGFR ligands induced by inflammatory cytokines in gastric cancer cells.

BACKGROUND & AIMS The epidermal growth factor (EGF) receptor (EGFR) can be transactivated by many factors including G-protein-coupled receptor agonists and cytokines. Although this EGFR transactivation reportedly requires a disintegrin and metalloproteinase (ADAM) that sheds the ectodomain of EGFR ligands, the detailed mechanisms are still unknown. This study evaluated the mechanism of interleukin (IL)-8- and IL-1beta-dependent shedding of the EGFR ligand in KATO III cells. METHODS We established transfectants stably expressing alkaline phosphatase-tagged heparin-binding EGF-like growth factor (HB-EGF), transforming growth factor alpha, or amphiregulin precursors, and depleted ADAM proteins, using short interfering RNA against ADAM10, 12, or 17. We assessed shedding of EGFR ligands by measuring AP activities in the conditioned media after IL-1beta or IL-8 stimulation. EGFR activation was examined by immunoprecipitation and Western blotting using antiphosphotyrosine antibody. KB-R7785 and anti-IL-8 neutralizing antibody were used to inhibit activities of ADAMs and IL-8 action, respectively. RESULTS IL-8 dose dependently released the EGFR ligands and transiently phosphorylated EGFR, with a peak at 15 minutes. KB-R7785 completely blocked IL-8-induced shedding and EGFR transactivation. Depletion of ADAM10 also dramatically reduced IL-8-induced shedding and EGFR transactivation, but depletion of ADAM12 and 17 did not. IL-1beta dose dependently enhanced shedding of HB-EGF, which was not blocked by KB-R7785 in the early phase. In the late phase, however, the EGFR transactivation was blocked by KB-R7785 and abrogated by anti-IL-8 neutralizing antibody. CONCLUSIONS IL-8 induces shedding of EGFR ligands because of an ADAM10-dependent pathway in gastric cancer cells, whereas IL-1beta acts principally by an ADAM-independent pathway. IL-1beta-dependent prolonged EGFR transactivation involves multiple pathways, including an IL-8-dependent pathway.
MULTIPLE-F 0 ESTIMATION AND NOTE TRACKING FOR MIREX 2013 USING AN EFFICIENT LATENT VARIABLE MODEL Emmanouil Benetos

In this submission for MIREX 2013 we utilize an efficient latent variable model for multiple-F0 estimation and note tracking. The model is based on probabilistic latent component analysis and uses pre-extracted note templates from multiple instruments. The templates are also preshifted across log-frequency in order to support pitch deviations and frequency modulations. Contrary to typical shift-invariant models which need to perform convolutions for estimating model parameters, the present model avoids such computations by using the aforementioned pre-shifted templates. Three system variants are submitted: one trained on orchestral instruments for multiple-F0 estimation, one trained on orchestral instruments and piano for note tracking, and a final one trained on piano templates for pianoonly note tracking.
The chemopotentiation of cisplatin by the novel bioreductive drug AQ4N

AQ4N is a bioreductive drug that can significantly enhance the anti-tumour effect of radiation and cyclophosphamide. The aim of this study was to examine the ability of AQ4N to potentiate the anti-tumour effect of cisplatin and to compare it to the chemopotentiation effect of tirapazamine. In the T50/80 murine tumour model, AQ4N (50–100 mg/kg) was administered 30 min, 2.5 or 6 h prior to cisplatin (4 mg/kg or 8 mg/kg); this produced an anti-tumour effect that was approximately 1.5 to 2 times greater than that achieved by a single 4 or 8 mg/kg dose of cisplatin. Tirapazamine (25 mg/kg) administered 2.5 h prior to cisplatin (4 mg/kg) resulted in a small increase in anti-tumour efficacy. AQ4N was also successful in enhancing the anti-tumour effect of cisplatin in the SCCVII and RIF-1 murine tumour models. This resulted in an increased cell kill of greater than 3 logs in both models; this was a greater cell kill than that observed for tirapazamine with cisplatin. Combination of cisplatin with AQ4N or tirapazamine resulted in no additional bone marrow toxicity compared to cisplatin administered alone. In conclusion, AQ4N has the potential to improve the clinical efficacy of cisplatin. © 2001 Cancer Research Campaign http://www.bjcancer. com
Performance analysis of a dynamic programming track before detect algorithm

We analyze a dynamic programming (DP)-based track before detect (TBD) algorithm. By using extreme value theory we obtain explicit expressions for various performance measures of the algorithm such as probability of detection and false alarm. Our analysis has two advantages. First the unrealistic Gaussian and independence assumptions used in previous works are not required. Second, the probability of detection and false alarm curves obtained fit computer simulated performance results significantly more accurately than previously proposed analyses of the TBD algorithm.
Necessary and Unnecessary Help-Seeking in Children

Abstract The present study examined the task-related help-seeking behavior of 85 third- and fifth-grade boys and girls of varying ability. Children were given the opportunity to seek help as they desired. Their bids for help were classified objectively as necessary or unnecessary. Their preference for indirect versus direct help was also assessed. Results indicated that, with increased age, children seek more necessary help than unnecessary help and clearly prefer indirect help to direct help. Girls, more than boys, were found to prefer mastery-oriented help, especially at low ability levels. Implications of the findings for understanding individual differences in the adaptive use of help-seeking in achievement situations are discussed.
Survey of particle swarm optimization algorithm and its applications in antenna circuit

With the development of intelligent algorithms, particle swarm optimization (PSO) has become the hot spot for the study on objective optimization in recent years. PSO has many successful scientific and engineering applications. In this paper, a detail review of the basic concepts of PSO is provided. Several important ways to improve PSO is presented. Moreover, the theoretical analyses on PSO are provided. Finally, the applications in antenna circuit of PSO and its future challenging field are also pointed out in the remainder of this paper.
Applying CEP to Problems of Real-Time Data Analysis in Distributed IDS

Nowadays developers and researchers apply different approaches from the traditional rule based solutions to data mining or pattern search in DIDS. To implement their inventions into life, performance question is still open as DIDS is designed to operate in real-time with millions of packets per second. In this paper, we pay close attention to data systems used and will offer our draft of the data processing system to be used at implementation including all best from old and new approaches, designed especially to data mining applications. Academic supervisor: Yuri Gapanyuk, gapyu@bmstu.ru
Transparent visualization of large-scale and complex polygon meshes using a stochastic point-based rendering method

Efficient and reliable transparent visualization of large and complex surface data is important in many applications, including the visualization of medical data. Among the many methods, depth-peeling is an efficient solution for rendering polygon meshes transparently; however, the computational cost is related to the number of passes through the peeled geometry. Therefore, the depth-peeling method cannot efficiently render large and complex polygon meshes that require many passes through the geometry. In this paper, we solve this problem using a stochastic point-based rendering (SPBR) method. We use two types of large-scale and complex polygon meshes that have 5,744,376 and 4,800,644 triangles in the experiments. The rendering speed of our method is 3-5 times faster than that of the depth-peeling method for an image resolution of 512 × 512. Additionally, the SPBR method has an inherent visual effect: the outlines of target polygon meshes can be automatically enhanced. This makes the results of the SPBR method more vivid and comprehensible than those of the depth-peeling method.
Binding and Thermodynamic Parameters of Ovalbumin-oleic acid Conjugate

The present study aims to investigate association constants, binding capacity and different thermodynamic parameters of ovalbumin-oleic acid (Oval/OA) conjugate at different temperatures using fluorescence method. Oval/OA conjugate was prepared in a phoshphate buffer solution at different temperatures. The conjugation process resulted in a change of the fluorescence emission intensity. The emission spectra of the conjugate were analyzed according to Scatchard plot to obtain the association constant (ka ) values and the number of binding sites at several temperatures in the range of 22-55 C. From the Ka value, the free energy (∆G°) was calculated. The Van’t Hoff enthalpy (∆H) and entropy (∆S°) values associated with the conjugation were estimated using the Van’t Hoff equation. The results showed that the binding capacity and the association constant of Oval/OA conjugate were temperature dependent. Average number of binding sites of OA in Oval and Ka value at 22°C were about 2.0 and 1.8 ×10 M , respectively. On the other hand, at 55 °C average OA binding capacity of Oval and Ka value were about 3.0 and 0.73 x 10 M , respectively. The results also showed that the conjugation was enthalpically driven, accompanied by a negative contribution of entropy.
ORGANIZATIONAL POLITICS : CORRELATES WITH JOB SATISFACTION, ORGANIZATIONAL COMMITMENT, AND ORGANIZATIONAL CITIZENSHIP BEHAVIOR IN SENEGAL

The paper attempts to improve our understanding of employees’ reactions to political behavior in organizations in Senegal. The nature of the subject is quantitative, meaning that the study aims at judging the impact of organizational politics over job satisfaction, organizational commitment, and organizational citizenship behavior. From a sample of 125 individuals working in diverse organizations in Senegal, the findings from multiple linear regressions indicated that employees perceiving higher level of organizational politics were less satisfied with their job and reported lower level of organizational citizenship behavior and organizational commitment. The study makes a contribution to organizational behavior theory by extending knowledge on the harmful repercussions of organizational politics on employees ’job attitudes. The study can also help understand employees’ reactions and allow corporate leaders to develop rules and regulations that can prevent the occurrence of organizational politics or lessen its damages.
Mobility Management Architecture for Transport System

Next generation wireless/mobile networks will be IP based cellular networks integrating the internet with cellular networks. In this paper, we propose a new architecture for a high speed transport system and a mobile management protocol for mobile internet users in a transport system. Existing mobility management protocols (MIPv6, HMIPv6) do not consider real world fast moving wireless hosts (e.g. passengers in a train). For this reason, we define a virtual organization (VO) and proposed the VO architecture for the transport system. We also classify mobility as VO mobility (intra VO) and macro mobility (inter VO). Handoffs in VO are locally managed and transparent to the CH while macro mobility is managed with Mobile IPv6. And, from the features of the transport system, such as fixed route and steady speed, we deduce the movement route and the handoff disruption time of each handoff. To reduce packet loss during handoff disruption time, we propose pre-registration scheme using pre-registration. Moreover, the proposed protocol can eliminate unnecessary binding updates resulting from sequence movement at high speed. The performance evaluations demonstrate our proposed protocol has a good performance at transport system environment. Our proposed protocol can be applied to the usage of wireless internet on the train, subway, and high speed train. Keywords—Binding update, HMIPv6, Packet loss, Transport system, Virtual organization
Ambivalent Sexism, Submissive Behaviors, and Positive and Negative Affect as Predictor of Marital Adjustment

In this study, marital adjustment level of individuals was investigated in terms of their ambivalent sexism, submissive behaviors, and positive and negative affect. The data was collected with Marital Adjustment Scale, Ambivalent Sexism Inventory, Submissive Behaviors Scale, and Positive and Negative Affect Scale from 378 married individuals. The results of multiple regression analysis indicated that marital adjustment was positively predicted by positive affect; however, it was negatively predicted by negative affect. The finding showed that negative affect positively related to hostile sexism, benevolent sexism, submissive behaviors . Moreover, it was found a positive relationship between submissive behaviors and positive and negative affect . Lastly, the present study results showed that marital adjustment and benevolent sexism did not differ significantly between the genders; however, there was a significant difference between genders in terms of hostile sexism, submissive behaviors, and positive and negative affects.
Previs: a person-specific realistic virtual speaker

This paper describes a 2D realistic talking face. The facial appearance model is constructed with a parameterised 2D sample based model. This representation supports moderated head movements, facial gestures and emotional expressions. Two main contributions for talking heads applications are proposed. First, the image of the lips is synthesized by means of shape and texture information. Secondly, a nearly automated training process makes the talking face personalization easier, due to the use of mouth tracking. Additionally, lips are synchronized in real time with speech that is generated using a SAPI compliant text-to-speech engine.
A study of SIP trunk security and challenges

Several voice over internet protocol (VoIP) providers migrate to their services to session initiation protocol (SIP). SIP is a lightweight signaling protocol used to implement in wiled VoIP services. However, with the global spread of this service, we can see how VoIP is affected by the stealing of SIP trunk services. Thus, the VoIP Trade Company will exhaust it effort and income. Our survey shows how much SIP security is enforced when somebody cracks the SIP server, and looks for any VoIP process trunk IP to use the server as a legitimate user, or to try to harm the trunk by injecting it with a forged source code that will lead to a road map for the hacker. The latter will make it deny the server, or inject it with the SQL script effect to come with DDos attacks. Our study shows the interest of researchers and students on VoIP security. It also provides a road map between the hypotheses and implementation, particularly on how SIP is affected by the variety of attacks from the outside world and from inside the local network.