Miracle-dz/UniFAR-FTUs huggingface dataset:
Implementing a Social Identity Approach for Effective Change Management

ABSTRACT The social identity perspective asserts that it is the shared connection within a unified group that forms the foundation of successful group functioning. This is particularly salient during change. This review outlines the value and applicability of social identity principles in understanding change management. The first part of the article explains the underpinnings of resilient teams from a social identity perspective. In particular, the social identity approach is introduced, before the roles of shared and multiple contents in times of identity threat (e.g. during organizational change) are discussed. The second part of the article explains social identity strategies to build resilient teams in change contexts. In particular, the review focuses on the 3Rs approach (reflect, represent, and realize) as a developmental framework to create unique and distinctive social identities during change. Finally, a theoretical advancement of the 3Rs is proposed to include Reappraisal to optimize group and individual responses to the stress ubiquitous during change.
SDSS J102111.02+491330.4: A Newly Discovered Gravitationally Lensed Quasar

We report follow-up observations of two gravitational lens candidates identified in the Sloan Digital Sky Survey (SDSS) data set. We have confirmed that SDSS J102111.02+491330.4 is a previously unknown gravitationally lensed quasar. This lens system exhibits two images of a z = 1.72 quasar, with an image separation of 1. ″14 ± 0. ″04. Optical and near-IR imaging of the system reveals the presence of the lensing galaxy between the two quasar images. Observations of SDSS J112012.12+671116.0 indicate that it is more likely a binary quasar than a gravitational lens. This system has two quasars at a redshift of z = 1.49, with an angular separation of 1. ″49 ± 0. ″02. However, the two quasars have markedly different spectral energy distributions, and no lens galaxy is apparent in optical and near-IR images of this system. We also present a list of 31 SDSS lens candidates that follow-up observations have confirmed are not gravitational lenses.
Linear stability analysis for severe slugging: sensitivity to void fraction correlations

In this paper a numerical linear stability analysis is performed to a mathematical model for the two-phase flow in a pipeline-riser system. Void fraction is a key variable, as it influences the mixture properties and slip between the phases. In the model, it is assumed that an algebraic relationship exists between the void fraction and the state variables. This general representation allows to use empirical or drift flux based correlations. For a correct prediction of the stability behavior of a pipeline-riser flow, preventing the occurrence of severe slugging, it is important to assess the sensitivity of the system response to different void fraction correlations. Three void fraction correlations are implemented: Bendiksen (1984), Chexal et al. (1997) and Bhagwat and Ghajar (2014). The resulting stability maps and state variables profiles for vertical risers are compared for the different correlations. Results show that the different correlations give similar stability maps, with very small differences in the near horizontal branch (low gas superficial velocities) of the stability boundary and slight differences in the near vertical branch (low liquid superficial velocities). The different void fraction correlations show the right experimental trend by increasing the unstable region as the equivalent buffer length in the pipeline is increased.
Operational Transresistance Amplifier Based PID Controller

This paper presents Operational transresistance amplifier (OTRA) based proportional-integral- derivative (PID) controller with independent electronic tuning of proportional, integral, and derivative constants. The configuration can be made fully integrated by implementing the resistors using matched transistors operating in the linear region. Theoretical propositions are verified through SPICE simulations using 0.18 µm process parameters from MOSIS (AGILENT). In order to demonstrate the workability of the proposed controller, its effect on step response of an OTRA based second order system is analyzed and presented.
Increasing Abundance of Silky Sharks in the Eastern Indian Ocean: Good News or a Reason to be Cautious?

The silky shark (Carcharhinus falciformis) is the most common shark landed in Indonesian waters, including in the Indian Ocean. However, even though they are frequently caught, there is a lack of information on the population and abundance of silky sharks in the Indian Ocean. Cilacap and Tanjung Luar are two of Indonesia’s shark fishery hotspots, both located on the edge of the Indian Ocean, which is a part of the Indonesian Fisheries Management Area (FMA) 573. The fishers from both places usually have fishing grounds in that particular fisheries management area. This research aims to update the abundance, and to investigate the factors, which influence catches of silky shark in the FMA 573 based on monthly enumeration during 2015–2016. This study found that standardized catch-per-unit-effort (CPUE) or abundance indices of silky shark in the Indonesian FMA 573 increased from 2015 to 2016. We suggested that fish immigration and decreasing fishing pressure may affect the fish abundance. Fisheries management is required to regulate the fishing pressure, such as controlling the number of boats/licenses and the number of trips or fishing gear, as well as initializing spatial and temporal fishing closure.
Consequences of various landscape-scale ecosystem management strategies and fire cycles on age-class structure and harvest in boreal forests

At the landscape scale, one of the key indicators of sustainable forest management is the age-class distribu- tion of stands, since it provides a coarse synopsis of habitat potential, structural complexity, and stand volume, and it is directly modified by timber extraction and wildfire. To explore the consequences of several landscape-scale boreal forest management strategies on age-class structure in the Mauricie region of Quebec, we used spatially explicit simu- lation modelling. Our study investigated three different harvesting strategies (the one currently practiced and two differ- ent strategies to maintain late seral stands) and interactions between fire and harvesting on stand age-class distribution. We found that the legacy of initial forested age structure and its spatial configuration can pose short- (<50 years) to medium-term (150-300 years) challenges to balancing wood supply and ecological objectives. Also, ongoing distur- bance by fire, even at relatively long cycles in relation to historic levels, can further constrain the achievement of both timber and biodiversity goals. For example, when fire was combined with management, harvest shortfalls occurred in all scenarios with a fire cycle of 100 years and most scenarios with a fire cycle of 150 years. Even a fire cycle of 500 years led to a reduction in older forest when its maintenance was not a primary constraint. Our results highlight the need to consider the broad-scale effects of natural disturbance when developing ecosystem management policies and the importance of prioritizing objectives when planning for multiple resource use.
Suboptimal resource allocation scheme for scalable video multicast in integrated mobile WiMAX/WLANs network

The goal of Resource Allocation Scheme (RAS) is to accomplish maximum usage of resources, assures Quality of Service (QoS), exploit throughput and diminish power consumption with viable algorithm complexity and scalability of system. RA algorithm for dynamic RAS in downlink Mobile WiMAX is to maximize the minimum rate of user while satisfying power constraint. This study emphasizes on scalable video transmission in Downlink Mobile WiMax BS with 5 WLAN’s each comprised of 10 users with different QoS requirements. Convex optimization techniques in scheduling algorithms marginally improve the performance measure as compared to traditional iterative non-linear methods. This study proposes Active-Set optimization technique for power allocation (PA) amongst sub-carrier per Subscriber Station (SS) and Greedy Weighted Algorithm (GWA) for sub-carrier allocation. Finally simulation results show that the proposed GWA and Active-Set optimization technique can effectively achieve maximum network throughput and number of satisfied users.
Learner's Gender, Reading Strategies, and Reading Performance in Expository and Argumentative Macro-genres

This study investigated whether learners’ gender could make differences in their reading comprehension and use of reading strategies in theexpository and argumentative macro-genres. To this end, six short macrogenre-based reading passages with the same readability indices and length were prepared from which appropriate reading tests were constructed and administered to a total of 50 EFL intermediate male (n = 21) and female (n = 29) students. This was followed by administrating reading strategies questionnaires to explore the learners’ use of reading strategies in themacro-genres. Results of the study indicated that there was no statistically significant difference between male and female students’ reading comprehension in the macrogenres. It was also shown that there was no significant difference between male and female learners in the overall use of reading strategies in the same macro-genres. The findings of the study hold implications for language teaching and testing, teacher training, and curriculum design.
GEE Models for Maternal Morbidity in Rural Bangladesh

The maternal morbidity data in Bangladesh is scanty. This paper employs the prospective data on maternal morbidity in rural Bangladesh to identify the potential risk factors associated with pregnancy related complications. The data were collected by the Bangladesh Institute of Research for Promotion of Essential and Reproductive Health and Technologies (BIRPERHT) during November, 1992 to December, 1993. The GEE models with different correlation structures are used and tested for the maternal morbidity data. The logistic regression model based on exchangeable correlation structure for the repeated observations appears to be the best. The findings indicate that the risk of suffering from complications is higher for unwanted pregnancy, lower level or no schooling, lower age at marriage, 5 or more pregnancies prior to the index pregnancy.
Assessment of Systems for Mechanisation of Casting Production

Using data on the world production of castings, the situation of foundry industry in Poland was evaluated with emphasis put on the produc- tivity of domestic foundries. It has been observed that an increase of productivity requires a wide-scale mechanisation of the equipment used for casting production on modern foundry moulding lines. Modernisation of foundries is expected to help in creation of optimum conditions for casting production, satisfying all the requirements regarding quantity and quality of castings produced. Modern designs of moulding lines were described, including moulding machines and the related equipment.
MIL and SIL and PIL tests for MPPT algorithm

Abstract This paper presents guidelines to develop the Maximum Power Point Tracking controller, as developed in the automotive and aeronautical applications, this by following the V-cycle development process, which means that our controller will be validated by using Model In the Loop/ Software In the Loop/Processor In the Loop tests. In order to have the possibility of integrating the MPPT embedded software in automotive and aeronautical areas, and on the other hand to propose a low-cost option to test the hardware implementation of the MPPT algorithm. Therefore, a modified variable step Incremental Conductance algorithm is proposed in this study, which can reduce the steady-state oscillations and increase the tracking speed under sudden irradiance variation. Then, the Model-based design of the modified algorithm is developed and connected to the plant model (photovoltaic panel and Boost converter). Next, the system model is tested and validated by using Model In the Loop process. After that, the software of this algorithm is automatically generated for the host computer using embedded coder tool, and this software is connected to the plant model and tested using Software in the Loop process in the host computer. Finally, the software is generated from the MPPT model for the STM32F4 discovery board in order to create the Processor In the Loop block, which will be run in the STM32F4 discovery board, and the plant model will be simulated in the host computer, and the ST-LINK communication is used in order to connect the host computer and the embedded board.
Simulating Harvest Schedule for Timber Management and Multipurpose Management in Teak Plantations

Sustainable management of teak plantations in Java requires an improvement of the existing yield regulation method to optimize multiple benefits of the plantations at risk of stand destruction. This study was therefore aimed to formulate an alternative harvest scheduling model that integrates risk of stand destruction for supporting multipurpose management of teak plantations. The proposed model used a state-space planning model to simulate the dynamic of plantations due to timber harvesting and stand destruction, and then sought optimal solutions for two management scenarios, i.e. timber management that optimized total harvest volume and multipurpose management that optimized net present value (NPV) while increasing carbon stocks. Using a case study on a typical teak plantation, this study confirmed that increasing destruction rates reduced harvest volumes, NPV, carbon stocks, and resulted in imbalanced ending age-class structures. Reducing cutting-age limit increased harvest volumes and NPV, but it also reduced carbon stocks of the plantations. Although the multipurpose management generated lower financial benefit, it maintained carbon stocks and produced better ending age-class structures compared to timber management. The proposed harvest scheduling model provides a useful planning tool for managing teak plantations.
Investigation of Luhn's claim on information retrieval

In this study, we show how Luhn’s claim about the degree of importance of a word in a document can be related to information retrieval. His basic idea is transformed into z -scores as the weights of terms for the purpose of modeling term frequency (tf) within documents. The Luhn-based models represented in this paper are considered as the TF component of proposed TF × IDF weighing schemes. Moreover, the final term weighting functions appropriate for the TF × IDF weighting scheme are applied to TREC-6, -7, and -8 databases. The experimental results show relevance to Luhn’s claim by having high mean average precision (MAP) for the terms with frequencies around the mean frequency of terms within a document. On the other hand, the weighting, which significantly discriminates the importance between low/high frequencies and medium frequencies, degrades the retrieval performance. Therefore, any weighting scheme (TF) that is directly proportional to tf has a probability of high retrieval performance, if this can optimally indicate the difference of the importance regarding tf values and also optimally eliminate the terms that have high frequencies.
Multi-epoch VLBA Imaging of 20 New TeV Blazars: Apparent Jet Speeds

We present 88 multi-epoch Very Long Baseline Array (VLBA) images (most at an observing frequency of 8 GHz) of 20 TeV blazars, all of the high-frequency-peaked BL Lac (HBL) class, that have not been previously studied at multiple epochs on the parsec scale. From these 20 sources, we analyze the apparent speeds of 43 jet components that are all detected at four or more epochs. As has been found for other TeV HBLs, the apparent speeds of these components are relatively slow. About two-thirds of the components have an apparent speed that is consistent (within 2σ) with no motion, and some of these components may be stationary patterns whose apparent speed does not relate to the underlying bulk flow speed. In addition, a superluminal tail to the apparent speed distribution of the TeV HBLs is detected for the first time, with eight components in seven sources having a 2σ lower limit on the apparent speed exceeding . We combine the data from these 20 sources with an additional 18 sources from the literature to analyze the complete apparent speed distribution of all 38 TeV HBLs that have been studied with very long baseline interferometry at multiple epochs. The highest 2σ apparent speed lower limit considering all sources is . This suggests that bulk Lorentz factors of up to about 4, but probably not much higher, exist in the parsec-scale radio-emitting regions of these sources, consistent with estimates obtained in the radio by other means such as brightness temperatures. This can be reconciled with the high Lorentz factors estimated from the high-energy data if the jet has velocity structures consisting of different emission regions with different Lorentz factors. In particular, we analyze the current apparent speed data for the TeV HBLs in the context of a model with a fast central spine and a slower outer layer.
Is there hysteresis in South African unemployment? Evidence form the post-recessionary period

High unemployment in South Africa possess as the country’s most problematic economic issue faced by South African policymakers and hence is considered an overriding priority within the design of large scale government expenditure programmes. In this study, we investigate the hysteresis hypothesis for 8 categories of unemployment in South Africa using a battery of individual and panel unit root testing procedures applied to quarterly data collected in the post-recession period of 2008:q1 to 2017:q2. Indeed our empirical results confirm the hysteresis hypothesis for a majority of unemployment classifications with the exception of unemployment associated with persons aged 55 to 64 years old. Overall, our obtained empirical results hold far reaching ramifications towards domestic policymakers.
Improving News Traders using CRF

Since financial markets react to news very quickly it is necessary to react even quicker in order to make money. Normal text data has very high dimensionality and reducing the number of features needed to classify a document reduces the time needed to do so. This thesis looks at a way to reduce the feature space by use of Conditional Random Fields. To do this, a new data set is made using mandatory stock messages released to the Oslo Stock Exchange. The messages are combined with financial data on all trades completed in a three-year period. A Conditional Random Field is trained on the textual data and used to extract important features. The features are then used to train a Support Vector Machine classifier and a Random Forest classifier. Both are evaluated against using all features and using randomly selected features. The thesis find that reducing the number of features results in a 4 percentage point reduction in accuracy and a 81,25% reduction in run time. We conclude that it is possible to reduce the feature space without significant reduction in accuracy. We also conclude that using this method is not good enough for making a significant profit on the financial market. This is consistent with earlier work on feature reduction.
Picasso and the Invention of Cubism

This work seeks to transform our understanding of Cubism, showing in detail how it emerged in Picasso's work of the years 1906-13, and tracing its roots in 19th-century philosophy and linguistics. Linking well-known paintings and sculptures to the hitherto-ignored drawings that accompanied them, Pepe Karmel demonstrates how Picasso's quest to depict the human body with greater solidity led, paradoxically, to its fragmentation; and how Picasso used the archaic model of stage space to free himself from conventional perspective, replacing the open window of Renaissance painting with a new projective space. Rejecting the usual distinction between "analytic" and "synthetic" Cubism, Karmel shows how Picasso's changing artistic goals were realized in the crystalline Cubism of 1907-09, the gridded Cubism of 1910-11, and the planar Cubism of 1912-13. In other chapters, Karmel discusses the empiricist philosophy championed by Hippolyte Taine, which encouraged the breakdown of painting into its abstract elements, and laid the groundwork for an art of mental association rather than naturalistic figuration. Similarly, contemporary philology provided the model for a visual language employing both metaphoric and metonymic (but not arbitrary) signs.
Dynamical analysis of the complex radio structure in 3C 293: clues on a rapid jet realignment in X-shaped radio galaxies

Context. Radio galaxies classified as X-shaped/winged, are characterised by two pairs of extended and misaligned lobes, which suggest a rapid realignment of the jet axis, for which a potential cause (including binary supermassive black holes, a black hole merger, or a Lense-Thirring precession) is still under debate. Aims. Here we analyse the complex radio structure of 3C 293 winged source hosted by the post-merger galaxy UGC 8782, which uniquely displays a significant asymmetry between the sizes (and therefore the ages) of the two pairs of lobes, indicating that an episode of jet realignment took place only very recently. This allows us to tightly constrain the corresponding timescales, and therefore to discriminate between different models proposed for the formation of X-shaped radio galaxies in general. Methods. Based on all the available and carefully re-analysed radio data for 3C 293, we have performed a detailed spectral modelling for the older and younger lobes in the system, using the existing evolutionary DYNAGE algorithm. In this way we derived the lobes’ ages and jet energetics, which we then compared to the accretion power in the source. Results. We found that the 200 kpc-scale outer lobes of 3C 293 are ~ 60 Myr old and, until very recently, have been supplied with fresh electrons and magnetic field by the jets, i.e., jet activity related to the formation of the outer lobes ceased within the last Myr. Meanwhile, the inner 4 kpc-scale lobes, tilted by ~ 40° with respect to the outer ones, are only about ~ 0.3 Myr old. Interestingly, the best model fits also return identical values of the jet power supplying the outer and the inner structures. This power, moreover, is of the order of the maximum kinetic luminosity of a Blandford-Znajek jet for a given black hole mass and accretion rate, but only in the case of relatively low values of a black hole spin, a ~ 0.2. Conclusions. The derived jet energetics and timescales, along with the presence of two optical nuclei in UGC 8782, all provide a strong support to the Lense-Thirring precession model in which the supermassive black hole spin, and therefore the jet axis, flips rapidly owing to the interactions with the tilted accretion disk in a new tidal interaction episode of the merging process. We further speculate that, in general, X-shape radio morphology forms in post-merger systems that are rich in cold molecular gas, and only host slowly spinning supermassive black holes.