Miracle-dz/UniFAR-FTUs huggingface dataset:
Braking Distance of Hoist Conveyances Required for Safe Stopping Under the Conditions of Emergency Braking

This study investigates selected aspects of the dynamic behaviour of mine hoists during the emergency braking in an event of overtravel. Characteristics of the braking force that needs to be applied in the headgear and in the pit bottom to arrest the conveyance in the event of an overtravel are derived from laboratory and industrial test data and recalling the results reported in literature. The real hoist installation is replaced by a model whereby the equations of motion of rope elements are written as for elastic strings, taking into account the variable length of the hoisting rope section between the Koepe pulley and the conveyance being arrested in the head tower. Analytical formulas are provided whereby the displacement of the top conveyance with the payload for the constant elasticity coefficient of the hoisting rope section between the conveyance being arrested in the head tower and the Koepe pulley is expressed as the function of the braking force and of the operational parameters of the hoist gear. The hoist operation is investigated in the event of emergency braking, taking into account the two aspects of the cycle: – the time required for the conveyance to be stopped, – the distance travelled by the conveyance until it is stopped. The results of the dynamic analysis of the hoist installation in the conditions of emergency braking may be utilised in selection of the effective and adequate braking system guaranteeing the safety of the system operation.
Children Learning Object Oriented Programming: A Design Science Study

The discipline of teaching children is a topic that has been explored extensively throughout history. There are known theories about pedagogy which repeatedly have been proven to be successful, and have been used in countless cases. One area that remains unexplored, however, is teaching the concepts of object oriented programming to children. The objective of this report is to pinpoint the important characteristics of a game addressing this matter. By the use of a design science approach, the development of an artefact is presented. The artefact bases its design on known theories about children’s learning and elementary notions of object oriented programming. The evaluation of the artefact is done by the means of experiments involving seventeen students, and through analysis of observations, open-ended discussions and a paper quiz. The results indicate that it is possible to teach object oriented programming to younger children. The collected data were categorised in themes that were identified as opinion, learning outcome and inconclusive findings. Additionally, it is concluded that incidental learning and traditional methods of pedagogy are usable in games that teaches programming. The results will be useful both for the development of similar games, and for future research. Keywords-Educational game, object oriented programming, OOP, children, learning, design science.
Mixing Characteristics of Elliptical Jets with Plug

It is known that elliptical jets entrain surrounding air more effectively than round jets. Past studies also show that convergent-divergent nozzles operated at overexpanded conditions create flow instabilities that enhance the jet mixing. A convergent-divergent passage can be created between an elliptical nozzle and a round plug. The exit-to-throat height of the annular passage is non uniform around the nozzle. The aim of the present study is to investigate the characteristics of this arrangement which is expected to produce vigorous mixing. The mean velocity fields of subsonic-speed jets from such nozzle configuration were surveyed using an array of Pitot probes. Comparisons were made between jets using elliptical nozzles with plug at various pressure and exit-to-throat area ratios and jets from round, convergent nozzles with plug. The results indicate that elliptical nozzles with plug split the flow in two cores. This increases the mixing and promotes faster velocity decay in the plume. The flow instabilities associated to overexpanded conditions in the nozzle also contribute to enhance the mixing.
Ontogenetic variability in external morphology of round goby Neogobius melanostomus from Middle Danube, Slovakia

In the previous decade, four species of non-native goby have invaded the middle section of the River Danube. To understand the problems associated with these invasions better, we examined the external morphology of 184 round goby Neogobius melanostomus specimens using both triple regression (distance-based measurements) and geometrical (coordinates-based measurements) analysis within an ontogenetical and epigenetical aspect. Using geometrical analysis of distance-based characters, we found that the external body shape in four size groups of round goby remained essentially unchanged. Such direct development represents a strongly precocial (i.e. specialized) life-history, whereas earlier maturation in this non-native population suggests a shift back towards more altricial (i.e. less specialized, more generalized) life history. This combination of altricial–precocial trajectories seems to be typical for invasive round gobies and may be one of key factors for their successful colonization of new environments.
Recruitment variation in sympatric populations of Haliotis rubra ( Mollusca : Gastropoda ) in southeast Australian waters

Recruitment of abalone Haliotis rubra was examined in sympatric populations off southeastern Australia soon after the main spawning period. The size range of post-settlement juveldes (recruits) collected from the reef surface was indicative of recent settlement. Recruitment was strongest after the main spawning period but episodic minor recruitment in some populations was also observed throughout each year. Recruitment varied significantly both between populations and for each population over time; the latter varied over 3 orders of magnitude. The highest number of H. rubra recruits in a sample (the area contained within a 1 m2 quadrat) was 12456. Abalone larvae can settle in densities much hlgher than has previously been assumed. Local~sed dispersal of larvae provides an explanation for our results. Variability in recruitment of H. rubra was high even when the density of the adult population was constant.
Primary particle identification with MVA method for the LHAASO project

The LHAASO (Large High Altitude Air Shower Observatory) project, which is under construction at high altitude of 4400m a.s. l. in Sichuan, China,aims to observe the extensive air showers (EAS) induced by cosmic rays in the atmosphere. LHAASO consists of several large detector arrays including KM2A (1 km$^2$ array), WCDA (Water Cherenkov Detector Array) and WFCTA (Wide Field of view Cherenkov Telescope Array). By employing hybrid detection technique, LHAASO offers an accurate measurement of the cosmic-ray spectrum and composition around the knee region. Furthermore, the primary particle identification can be obtained by using Multivariate Analysis (MVA). In this contribution, we present the parameters that will be measured by various detectors of LHAASO in the EAS detection and discuss the performance of the MVA method for primary particle identification.
Quality Management Systems as a key element for company strategy selection - case study

Term quality can be defined as the implementation of specific requirements, having its source in the expectations and needs of customers, users of products or services and their buyers. In constructions sector quality is crucial at each and every phase of the process beginning with design ending with the use of the building. There exist many different methods and tools related to quality, Lean Management, Agility, which can enhance construction process. One of such methods is SWOT analysis that can be helpful in determining the current condition of the company performing it. Article presents brief description of the quality concept and introduction to the SWOT method. It is illustrated with the example of analysis performed in company from the construction sector related to design and production of wooden trusses showing which strategy would be most appropriate for the company to execute taking into account its current condition.
Stem cells and hepatocytes in therapy of liver diseases

Rezumat Celulele stem şi hepatocitele în terapia boliilor hepatice În prezent, există un interes crescut a utilizării celulelor stem în terapia diferitor boli. Celulele stem au capacitatea de a se devide pentru o perioadă indefinită de timp, de a se autoreînoi şi de a da naştere mai multor tipuri de celule. Terapia celulară poate fi definită ca „utilizarea celulelor în restabilirea, menţinerea şi îmbunătăţirea funcţiilor ţesuturilor şi organelor”. Acest articol de sinteză este adresat hepatocitelor, celulelor stem hepatice, inclusiv originii lor, rolului acestora în regenerarea ficatului şi dezvoltarea fibrozei, şi folosirea lor posibilă în tratarea bolii de ficat. Cele mai multe tulburări hepatice rezultă din disfuncţia hepatocitelor, aici acordîndu-se un mare interes transplantului de hepatocite izolate. În închiere, hepatocitele izolate şi derivate trebuie să demonstreze activitatea normală fiziologică, anume în funcţia de detoxificare şi metabolismul specific, ce se determină prin expresia genelor a proteinelor prezente în hepatocitele adulte.
Numerical analysis of turbulent flow separation in a rectangular duct with a sharp 180‐degree turn by algebraic Reynolds stress model

Turbulent flow in a rectangular duct with a sharp 180‐degree turn is difficult to predict numerically because the flow behavior is influenced by several types of forces, including centrifugal force, pressure‐driven force, and shear stress generated by anisotropic turbulence. In particular, this type of flow is characterized by a large‐scale separated flow, and it is difficult to predict the reattachment point of a separated flow. Numerical analysis has been performed for a turbulent flow in a rectangular duct with a sharp 180‐degree turn using the algebraic Reynolds stress model. A boundary‐fitted coordinate system is introduced as a method for coordinate transformation to set the boundary conditions next to complicated shapes. The calculated results are compared with the experimental data, as measured by a laser‐Doppler anemometer, in order to examine the validity of the proposed numerical method and turbulent model. In addition, the possibility of improving the wall function method in the separated flow region is examined by replacing the log‐law velocity profile for a smooth wall with that for a rough wall. The analysis results indicated that the proposed algebraic Reynolds stress model can be used to reasonably predict the turbulent flow in a rectangular duct with a sharp 180‐degree turn. In particular, the calculated reattachment point of a separated flow, which is difficult to predict in a turbulent flow, agrees well with the experimental results. In addition, the calculation results suggest that the wall function method using the log‐law velocity profile for a rough wall over a separated flow region has some potential for improving the prediction accuracy. Copyright © 2007 John Wiley & Sons, Ltd.
An Econometric Analysis of Food Security Determinants in Malaysia: A Vector Error Correction Model Approach (VECM)

Food security issue is getting more attention by world today. Although, Malaysia is a middle income country able to produce her own food, but there is still lack of food supply for domestic needs. This paper thus analyse the factors that affect the food security model in Malaysia during the period of 1982-2011. The analysis in this paper include food production index as food security proxy while the other variables include food prices, Malaysian population, foreign workers and CO2 emission as important determinants of food security. The assessment of the impact of these factors is achieved using the Vector Error Correction Model approach (VECM). The series on the food prices, Malaysian population, foreign workers, CO2 emission and palm-based biodiesel production are co-integrated. While in the short run only foreign worker is an important determinant of food security. Hence, the results of error correction term (Ect) from VECM shows that there is a long run causality between dependent variables and explanatory variables. This model is useful quantitative tool to assess food security especially to determine specific variables that explain the highest effect to food security at the national level.
Foliar application of processed calcite particles improves leaf photosynthesis of potted Vitis vinifera L. (var. ‘Cot’) grown under water deficit

Aim: To determine the effect of foliar sprays of processed mineral particles (micronized calcite, Megagreen®) on leaf water relations and photosynthesis in grapevines (Vitis vinifera L. var. Cot) grown under water deficit.Methods and results: Potted plants were grown in a glasshouse in summer under natural light (Toulouse, lat. 43°32’14.50’’N; long. 1°29’44.25’’W; altitude 148 m a.s.l.). Well-watered and drought stressed vines were foliar sprayed with various doses of micronized calcite. Leaf water potential, gas exchange (light-saturated CO2 assimilation rate, ACO2; stomatal conductance, gs) and chlorophyll fluorescence (quantum efficiency of PSII photochemistry, ФPSII) were measured. Water stress affected predawn and midday leaf water potentials, ACO2, gs and ФPSII of the 40-day-old (younger fully expanded) leaves. Megagreen® application did not lead to appreciable changes in leaf water potentials but was able to mostly restore ACO2 and ФPSII in water stressed plants to levels of well-watered control plants. This effect was associated with a positive, although less pronounced, effect on gs. The beneficial effects of processed calcite particles were also observed on younger and older leaves, at low and high atmospheric vapor pressure deficit, and in the morning as well as in the afternoon. In well-watered plants, processed calcite particles had no effect on photosynthesis except under very high evaporative demand. In water stressed plants, ACO2 was increased by increasing ambient CO2 concentration. At elevated CO2, calcite particles did not increase CO2 assimilation.Conclusion: Foliar application of processed calcite particles alleviated most of the adverse effects of water stress on grapevine photosynthesis. This was associated with enhanced gs in the whole plant canopy.Significance and impact of the study: In the context of climate change, grapevine will most likely experience long periods of drought during its seasonal cycle. Foliar application of processed mineral particles is widely used to reduce heat stress in perennial fruit crops. Here, the micronized calcite Megagreen® does improve photosynthesis of water stressed grapevines.
Limited accuracy of linearized gravity

Standard cosmological models rely on an approximate treatment of gravity, utilizing solutions of the linearized Einstein equations as well as physical approximations. In an era of precision cosmology, we should ask: are these approximate predictions sufficiently accurate for comparison to observations, and can we draw meaningful conclusions about properties of our Universe from them? In this work we examine the accuracy of linearized gravity in the presence of collisionless matter and a cosmological constant utilizing fully general relativistic simulations. We observe the gauge-dependence of corrections to linear theory, and note the amplitude of these corrections. For perturbations whose amplitudes are in line with expectations from the standard $\Lambda$CDM model, we find that the full, general relativistic metric is well-described by linear theory in Newtonian and harmonic gauges, while the metric in comoving-synchronous gauge is not. For the largest observed structures in our Universe, our results suggest that corrections to linear gravitational theory can reach or surpass the percent-level.
Nondestructive Investigation of Stress-Induced Damage in Concrete

The changes in the sonic surface wave velocity of concrete under stress were investigated in this paper. Surface wave velocities at sonic frequency range were measured on a prismatic concrete specimen undergoing several cycles of uniaxial compression. The loading was applied (or removed) gradually in predefined small steps (stress-controlled). The surface wave velocity was measured at every load step during both loading and unloading phases. Acoustic Emission (AE) test was conducted simultaneously to monitor the microcracking activities at different levels of loading. It was found that the sonic surface wave velocity is highly stress dependent and the velocity-stress relationship follows a particular trend. The observed trend could be explained by a combination of acoustoelasticity and microcracking theories, each valid over a certain range of applied stresses. Having measured the velocities while unloading, when the material suffers no further damage, the effect of stress and damage could be differentiated. The slope of the velocity-stress curves over the elastic region was calculated for different load cycles. This quantity was normalized to yield a dimensionless nonlinear parameter. This parameter generally increases with the level of induced damage in concrete.
PSII photoinhibition and photorepair in Symbiodinium (Pyrrhophyta) differs between thermally tolerant and sensitive phylotypes

Cnidarians containing symbiotic microalgae often inhabit highly variable light environments where successful growth requires that, during transient (potentially stressful) periods of high light (HL), the microalgal cells invest energy in photoprotection to minimise photodamage, or allow for photodamage to occur and invest in photorepair; however, the relative contribution of photoprotection and photorepair remains uncharacterised. Here we determined the light dependence of Photosystem II (PSII) photoinhibition and photorepair in 2 phylotypes of Symbiodinium displaying different susceptibilities to thermal stress. Upon exposure to photon flux densities (PFDs) >500 μmol photons m-2 s-1 the thermally 'sensitive' Strain A1.1 displayed higher net photoinhibition, measured as a decrease in maximum PSII efficiency (Fv/Fm), than the thermally 'tolerant' Strain A1. In contrast, gross photoinhibition, assessed as the decline of Fv/F m in the presence of an inhibitor of D1 protein synthesis, was similar in the 2 strains. Therefore, photorepair was considered to be the key mechanism minimising net photoinhibition in Strain A1. Consistent with this conclusion, the 2 strains displayed similar capacities for other mechanisms of avoiding photodamage, specifically, photochemical (qP) and non-photochemical (NPQ) excitation energy quenching. Measurements on Strain A1 grown under 2 PFDs (100 and 650 μmol photons m-2 s-1) revealed that photoacclimation to HL involved the upregulation of qP, which minimised gross photoinhibition by maintaining PSII in a more oxidised state. We conclude that both interspecific (e.g. phylotype diversity) and intraspecific (e.g. photoacclimation state) factors affect the susceptibility of Symbiodinium to light stress. © Inter-Research 2010.
Strategies to increase effectiveness of growth factor receptors-targeted therapy in glioblastoma

5 List of articles 6 List of abbreviations 7 1. Background 1.1. Brain tumours 8 1.2. GFR-TKsgeneral considerations 10 1.3. GFR-TKs in brain tumours 13 2. The Present Study 2.1. Aims 15 2.2. Materials and Methods 15 2.3. Summary of the papers 19 2.4. Discussion 21 3. Acknowledgements 23 4. References 26
Efetividade de um programa de protetização auditiva em idosos através da aplicação do questionário HHIE-S

Introducao: A perda auditiva em idosos tem sido estudada nao apenas pelo contexto biologico mas tambem pelo impacto negativo na qualidade de vida desta populacao. A protetizacao auditiva e parte fundamental na reabilitacao auditiva. Objetivo: Avaliar o impacto subjetivo de um programa de reabilitacao auditiva em idosos atraves da aplicacao do questionario HHIE-S antes e apos 30 dias de terapia reabilitadora. Metodo: 47 individuos idosos foram avaliados, sendo 25 do sexo masculino. O questionario HHIE-S foi aplicado antes e 30 dias apos terapia de reabilitacao auditiva. Resultado: A idade media da amostra foi de 75 anos. 57% da amostra apresentou perda auditiva moderada. O escore medio obtido passou de 24,2 para 1,8 pontos apos o periodo de terapia fonoaudiologica (p Introduction: The elders' hearing loss has been studied not only by the biological context, but also by the negative impact on the life quality of this population. The auditory prothetization is a basic part in the auditory rehabilitation. Objective: To evaluate the subjective impact of an auditory rehabilitation program in elders through the application of the HHIE-S questionnaire before and 30 days after rehabilitating therapy. Method: 47 elder individuals were evaluated and 25 were male. The HHIE-S questionnaire was applied before and 30 days after auditory rehabilitation therapy. Result: The mean age of the sample was 75 years of age. 57% of the sample presented moderate hearing loss. The average score obtained passed from 24.2 to 1.8 points after the phonoaudiologic therapy period (p
The Relationship between Slack Resources and Performance: An Empirical Study from China

Although organizational research posits various relationships between a firm's slack resources and performance, findings to date have been ambiguous. The purpose of this study is to attempt to reconcile previous views of the relationship between slack resources and performance through employing empirical analysis based on survey data from 47 pharmaceutical and chemical firms in Henan Province of China. The results indicate that the relationship between slack resources and the performance is inverse N-shaped. Results provide evidence of a curvilinear relationship between slack resources and performance and broadly demonstrate that relationships differ based on industry circumstances and slack resources. Additionally, this study is the first to empirically identify an inverse N- shaped relationship between slack resources and performance, indicating that, in certain industry circumstances, little and much slack resources are bad for performance. Overall, results highlight the importance of additional research into intervening factors impacting the slack-performance relationship.
Procyclicality of US Bank Leverage

In light of the current debate about the link between accounting and financial stability, we investigate the determinants of procyclical book leverage for US commercial and savings banks. We find that total asset growth and GDP growth are both positively related to book leverage growth. Our evidence is not consistent with the notion that fair value accounting contributes to procyclical leverage or that historical cost accounting reduces procyclicality. Overall, the business model of banks and the level of the regulatory capital ratio and book leverage seem to be more important for procyclical leverage than accounting or regulatory risk weights.