Miracle-dz/UniFAR-FTUs huggingface dataset:
Trabalho em equipa em Portugal: Uma década de progresso

In the last decade in Portugal, we have witnessed the explosion of the number of studies about the antecedents of the effectiveness of work teams in complex and extreme work environments. Research has focused on behavioral (e.g. coordination, leadership), cognitive (e.g. shared mental models, transactive memory systems) and affective (e.g. team work engagement) factors that help us explaining why some teams perform better, are more satisfied with their work, and believe that they are more viable (even the ones that work in adverse conditions). Throughout this article, we review team studies conducted in Portugal over the last ten years, we establish bridges with other international contributions, and present suggestions for the future of teamwork research in the next decade.
“Postconcussive” Symptoms Explained by PTSD Symptom Severity in U.S. National Guard Personnel

Abstract The aim of the present study was to evaluate the unique associations between self-report history of mild traumatic brain injury (mTBI) and posttraumatic stress disorder (PTSD) symptoms on functional outcomes years after head injury. National Guard personnel (n = 608) from the mountain west who denied history of head injury (n = 342, 56.3%) and with history of mTBI (n = 266, 43.7%) were included in the present analyses. Participants completed self-report study measures of emotional (i.e., depression, PTSD symptoms), social (i.e., relationship satisfaction and perceived social support), and other general (i.e., concentration difficulties and sleep disturbance) functioning through an online survey. PTSD symptoms explained unique variance in emotional, social, and general functioning above and beyond history of mTBI. After controlling for PTSD symptoms, mTBI was not associated with current depression symptoms, relationship satisfaction, social support, concentration, or sleep difficulties. Self-report of PTSD symptoms account for emotional, social, and general functioning impairments often attributed to mTBI and labeled postconcussive syndrome. Symptoms often described as postconcussive syndrome in patients with mild traumatic brain injury may be better explained from a psychological standpoint. Patients with history of mTBI and persistent complaints should be screened for mental health conditions. If mental health concerns are present, treatment of that disorder may be indicated.
A Novel Cysteine-Functionalized MxOy Material as Support for Laccase Immobilization and a Potential Application in Decolorization of Alizarin Red S

Immobilization process improves the enzyme properties, like stability, activity, selectivity or specificity. In the study, a novel cysteine-functionalized MxOy (ZrO2, SiO2) material was used as a support for the immobilization of laccase from Trametes versicolor. The proposed matrix was prepared using a simple sol-gel method. The cysteine was introduced during the synthesis of a sample. Additionally, the obtained supports were modified with glutaraldehyde. The basic properties of the prepared cysteine functionalized ZrO2 and SiO2 were determined using spectroscopic, thermal, porous, electrostatic and elemental analysis. Furthermore, the obtained biocatalytic systems were used as catalysts in the oxidation of sulfonic acid. Catalytic and kinetic parameters were determined based on the proposed model reaction. Next, laccase immobilized on ZrO2- and SiO2-based materials were, for the first time, utilized in the decolorization of Alizarin Red S. In that process, the influence of duration, pH and temperature on the efficiency of decolorization was evaluated. The results show that the proposed biocatalytic systems offer good specific activity (ca. 19 U/mg) and activity retention (ca. 77%). Importantly, they can be successfully used in the decolorization of Alizarin Red S with high efficiency (above 95%).
The association between an established Chief Experience Officer role and hospital patient experience scores

The healthcare industry is currently reacting to multiple stakeholders demanding improvements to the patient experience. Some healthcare organizations are implementing new management structures, i.e., the role of Chief Experience Officer (CXO). This study statistically reviewed descriptors associated with hospitals that have and have not created and filled the role of CXO and, more importantly, measured the association between the CXO role and results of patients’ perceptions of their experience of care as measured by publicly reported Hospital Consumer Assessment of Healthcare Providers and Systems (HCAHPS) results. This study was conducted utilizing data gather on hospitals in three states, California, Florida, and New York. The results of the study yield insight into the organization characteristics of hospitals and the market factors associated with those hospitals that have filled the CXO role. Hospitals with a formal CXO role are larger, more likely to be for profit, and operate in metro areas of these states with higher per capita income. In addition, hospitals that have a formal CXO role are also more likely to have higher HCAHPS scores as determined by the patient recommendation question as well as the hospital overall rating question included in the HCAHPS survey.
Water level arrangement in the drainage channel on peat chemical characteristics, growth and corn yield

This research was aimed to study the influence of water depth in the drainage channel arrangement on peat chemical characteristics, the growth, and corn yield. This research was conducted in Rasau Jaya Umum Village, Rasau Jaya Sub-district, Kubu Raya District, West Kalimantan Province, for ten months (February - December 2016). The research field consists of three plots of land, with the area of each plot of 0.2 ha (40 m x 50 m). The depth of water drainage channels arranged in the experimental plots: treated without drainage channel, depth of water drainage channel 30 cm and depth of water drainage channel 60 cm. Pioneer 21 (P21) variety of corn was planted in the research field with the spacing of 25 cm x 75 cm and given ameliorant of coastal sediment 8 tons/ha, urea fertilizer 400 kg/ha, SP 36 300 kg/ha, and KCl 100 kg/ha. The results showed that in the soil depth of 20-40 cm, the water depth of the drainage channel 60 cm influenced the decrease of organic carbon, total N, Cation Exchange Capacity (CEC) and available P. The water level depth in the drainage channel up to 60 cm did not affect the growth and corn yield. The arrangement depth of the water level in drainage channel 30 cm is the most ideal for corn growth and sustainability of peat.
History returns: Intergenerational mobility of education in China in 1930–2010

During the twentieth century, China witnessed a dramatic episode of societal change when a series of revolutions toppled the social order that sustained the imperial rule for more than a thousand years. One of the most significant changes was the cessation of keju – the royal examination system that provided the only channel for upward social mobility – which permanently changed the nature of Chinese education. Education was no longer a bridge to enter officialdom, but a means to enhance one’s productivity and life satisfaction. The spread of education, however, was slow until the communist revolution of 1949. The Chinese Communist Party (CCP) began massive campaigns to elevate the Chinese population’s level of education. As a result, the number of illiterate or semi-illiterate people declined from 70 per cent among people born in the 1930s to about 10 per cent among those born around 1980.1 The period of the Cultural Revolution (1966–76) saw the fastest growth in elementary and high school education, from which young
An improved genetic algorithm with Lagrange and density method for clustering

To overcome the shortcomings of K‐means clustering including clustering numbers, sensitivity to clustering center (seeds) and local optimization, this article proposes an improved genetic algorithm (GA) with a novel Lagrange‐based fitness function and an initial population technique(called NicheClust algorithm); the NicheClust can determine the best chromosomes and then feeds these into K‐means as initial seeds to achieve higher‐quality clustering results by allowing the initial seeds to readjust in terms of clustering demands. The GA approach is proposed to search for a global optimally solution. The initial population method is presented to automatically capture the appropriate number of clusters and find the initial seeds. The Lagrange‐based approach is used to prevent the fitness function from prematurely converging and capture global optimization for K‐means clustering results. Experimental results based on six taxi Global Positioning System (GPS) datasets verify the higher performance of NicheClust compared to other clustering methods and validate the effectiveness with statistical analysis method.
Effective Extraction of Polyphenols from Onion and Pomegranate Peels andEstimation of Radical Scavenging Activity of Extracted Polyphenols

Vegetable peels are usually thrown out as waste, when they usually contain significant amounts of polyphenols. The main aim of this study was to establish an effective extraction method of polyphenols and study their radical scavenging activity. From the results we can clearly infer that 70°C, 40 mins and Ethanol solvent are the best extraction parameters, when considered individually (not in combination), also we can see that for extraction of total phenolics from pomegranate peels ethanol could be the best solvent. In case of onion peels, the maximum yield was obtained from extraction with distilled water. From the observations, we have also calculated the averages of the total phenolic content at different storage temperatures. At -25, the degradation of phenolics was least and when stored in room temperature the degradation of total phenolic content was the most. Thus, we performed DPPH Assay to determine the radical scavenging activity of the phenolic extracts which were stored at -25°C (as degradation of phenolics were least in this storage temperature). Phenolics extracted from onion peels at 50°C for both 20 mins and 40 mins extracted in distilled water showed a radical scavenging activity of 92%. Phenolics extracted from pomegranate peels at 60°C for 60 min extracted in distilled water showed a radical scavenging activity of 91.2%.
A Low-Cost, Small-Size, and Bluetooth-Connected Module to Detect Faults in Rolling Bearings

Condition monitoring techniques have been successfully applied to detect damaged bearings. However, the signal acquisition and the subsequent processing are typically outsourced to expensive data acquisition boards and complex software, resulting in expensive solutions. As a side effect, the integration of condition monitoring systems in wireless sensor networks can be tough to achieve. Aiming to overcome such issues, a low-cost and small-size electronic module to be placed in the proximity of the bearing to be monitored was developed. The acoustic signal delivered by the bearing is acquired, and the corresponding frequency spectrum is evaluated on-board. Based on that, the developed module automatically detects the presence of defects and notifies the remote controller via a wireless connection only when a fault is detected, thus avoiding the use of data cables whilst minimizing the amount of transferred data. Experimental tests carried out on the proposed system assessed the accuracy of the evaluated frequency spectrum, resulting in an amplitude error within ±0.6%, as well as the fault detection capability in the presence of environmental acoustic noise.
Research on the Retrieval Algorithm of Speech Keyword Based on DTW

According to the query items entered by user, the speech retrieval is a data mining technology to retrieve and return the necessary results form massive audio data. In this paper, the history of speech retrieval is summarized and its necessity of studying is analyzed. On this basis, starting from the search of key words, the dynamic time regulation is derived in detail, and it is simulated by MATLAB. According to the results of MATLAB performance analysis, the optimization direction of speech keyword retrieval algorithm is explored.
THEORIES OF CHANGE IN THE PROCESS OF RURAL TRANSFORMATION: A REFINED WAY FORWARD

Theory of change has been a useful evaluation tool for social science research. The interest in its use has been notable in recent years amongst international aid organisations and public authorities who make huge investment in social oriented intervention with more focus on the challenges related to gender empowerment and poverty cure in rural area. Logically, the achievement of intended change (impact) matters. In this context, the emerging question is: 'How are we getting a candid profile of change after the project implementation? The sources of data for analysis are taken from evaluation reports of Programme Evaluation Organisation, Planning Commission, Government of India. Among the convolutions, found in the theory of change the important one is that the monitoring system does not extend beyond output level in the causal path revealing only impaired impact confining to the physical achievement vs target. This apart, there is no process monitoring of implementation and mid-course corrections. The paper suggests a slew of critical constituents for the refined theory of change which include: (a) process monitoring; (b) result based monitoring and evaluation (c) transparent outcome and the impact; and (d) human behaviour.
Wide Input Voltage Range Operation of the Series Resonant DC-DC Converter with Bridgeless Boost Rectifier

The series resonant DC-DC converter (SRC) can regulate the input voltage in a wide range at a fixed switching frequency. In this work, the bridgeless rectifier, which is utilized intensively in the applications of the power factor correction, has been integrated into the SRC as a voltage step-up cell at the output-side of the SRC. It is shown that the conventional overlapping pulse-width modulation (PWM) of the two metal oxide semiconductor field-effect transistors MOSFETs in this rectification cell limits the input voltage regulation range of the converter due to excessive power losses in abnormal operating conditions. The abnormal operating conditions occur when the instantaneous voltage across the resonant capacitor is larger than the secondary voltage of the isolation transformer. This happens at high values of the DC voltage gain, i.e., low input voltages and high currents, which causes the resonant current to flow in the reverse direction in the same half-cycle through a parasitic path formed by overlapping PWM of the rectifier MOSFETs. The abnormal operation results in additional conduction loss in the converter as the MOSFETs of the bridgeless boost rectifier turn on at high current at the beginning of each half of the switching period. Accordingly, the overall efficiency of the converter significantly deteriorates. This paper proposes the hybrid PWM aiming to improve the efficiency of the SRC with a bridgeless boost rectifier in a wide input voltage regulation range. The converter swaps between the overlapping and the proposed short-pulse PWM schemes to drive the MOSFETs in the bridgeless boost rectifier. The transition between the two PWM schemes is defined according to the boundary condition that relies upon the operating point of the converter power and the input voltage. The proposed hybrid PWM scheme is analyzed and compared to the overlapping PWM at different levels of the input voltage and the load power. A 300 W prototype was studied in the laboratory to show the feasibility of the proposed hybrid PWM scheme with the closed-loop control system to switch between the two PWM schemes.
Multi-photon creation and single-photon annihilation of electron-positron pairs

In dieser Arbeit werden die quantenelektrodynamischen Prozesse der Elektron-Positron Paarerzeugung durch Multiphotonen-Absorption und der Elektron-Positron Annihilierung in ein einzelnes Photon untersucht. Die Paarproduktion erfolgt in der Kollision eines relativistischen Elektrons mit einem intensiven Laserstrahl und wird im Rahmen der Quantenelektrodynamik in externen Laserfeldern beschrieben. Fur die in diesem Prozess auftretenden Resonanzen wird auf systematische Weise eine Regularisierungsmethode entwickelt. Wir berechnen totale Produktionsraten, Positronenspektren und die relativen Beitrage der relevanten Reaktionskanale in verschiedenen Wechselwirkungsbereichen. Unsere Ergebnisse stimmen gut mit vorliegenden experimentellen Daten vom SLAC uberein und erlauben eine tiefergehende Interpretation der Messergebnisse. Auserdem untersuchen wir den Paarproduktionsprozess in einem manifest nichtperturbativen Regime, welches in zukunftigen Experimenten auf der Basis von Laserbeschleunigung realisiert werden konnte. Die Elektron-Positron Annihilierung in ein einzelnes Photon geschieht in Anwesenheit eines zweiten Zuschauer-Elektrons, das den Ruckstos aufnimmt. Verschiedene kinematische Konfigurationen der drei Teilchen im Anfangszustand werden detailliert untersucht. Unter bestimmten Bedingungen besitzt das emittierte Photon charakteristische Winkelverteilungen und Polarisationseigenschaften, welche die Beobachtung des Effekts erleichtern konnen. Fur ein relativistisches Elektron-Positron Plasma im thermischen Gleichgewicht zeigen wir, dass die Zerstrahlung in ein Photon bei Plasma-Temperaturen oberhalb 3 MeV zu dominieren beginnt. Derartige Mehrteilchen-Korrelationseffekte sind somit fur die Dynamik sehr dichter Elektron-Positron Plasmen von wesentlicher Bedeutung.
Improved Pedestrian Detection Algorithm Based on HOG and SVM

Pedestrian detection becomes an acknowledged challenging problem to the development of intelligent video surveillance and vehicle active safety. At present, there are some shortcomings in pedestrian detection, such as missing detection, false detection, inaccurate detection frame location. An improved algorithm based on Histograms of Oriented Gradients (HOG) and Support Vector Machine (SVM) is proposed to tackle these problems. This algorithm employs face detection technology to further enhance the accuracy of pedestrian detection. Firstly, face detection and pedestrian detection are adopted to accurately locate the face contour and the human body contour, respectively. And then, detection frame is redraw by synthesizing the coordinates of the upper left corner of the face contour and the coordinates of the lower right corner of the human body contour. A new test database is established with numerous images in complex scenes. And then, relevant experimental results demonstrate the effectiveness of proposed algorithm and shows better target detection accuracy and real-time performance compared with existing methods.
A Study on the Relationship between Feng Shui Interest and Management Performance

The purpose of this study is to derive the main factors of Feng Shui site recognition and the effect of the factors on the Management Performance of small business through the previous studies in order to investigate the relationship between Feng Shui interest and management performance for the sake of development of small businesses. In addition, the research is directed to the mediating effect of Feng Shui site recognition and adjusted mediating effect of entrepreneurship in the relationship between Feng Shui interest and management performance. Philosophy, management philosophy, ethics, personality, values, religion. The tendency of success or failure depends on the entrepreneurial world view and life view, such as the living environment. In particular, the location selection and spatial composition of workplaces tend to be determined by the personal factors of the founders. The formation of these personal factors can be said to be the result of accumulated customs of traditional customs or customs closely related to life. However, in many studies so far, especially in the study of commercial area analysis, the search for the relationship between Feng Shui factors and small business management performance, which is deeply embedded in our daily space selection behavior, has been a void of absence. It is necessary not to confine the subject of research to small businesses, but to extend it to medium- or large-sized companies. In addition, it is necessary to research the impact of Feng Shui site recognition not only on the management field but also on other fields.
Ammonia emissions from cattle dung, urine and urine with dicyandiamide in a temperate grassland

Deposition of urine and dung in pasture‐based livestock production systems is a major source of ammonia (NH3) volatilization, contributing to the eutrophication and acidification of water bodies and to indirect nitrous oxide emissions. The objectives of this study were to (i) measure NH3 volatilization from dung and urine in three seasons, (ii) test the effect of spiking urine with the nitrification inhibitor dicyandiamide (DCD) on NH3 volatilization and (iii) generate NH3 emission factors (EFs) for dung, urine and urine + DCD in temperate maritime grassland. Accordingly, simulated dung, urine and urine spiked with DCD (at 30 kg DCD/ha equivalent rate) patches were applied to temperate grassland. Treatments were applied three times in 2014 with one measurement of NH3 loss being completed in spring, summer and autumn. The NH3‐N EF was highest in spring, which was most likely due to the near absence of rainfall throughout the duration of loss measurement. The EFs across the experiments ranged between 2.8 and 5.3% (mean 3.9%) for dung, 8.7 and 14.9% (mean 11.2%) for urine and 9.5 and 19.5% (mean 12.9%) for urine + DCD, showing that ammonia loss from dung was significantly lower than from urine. Aggregating country‐specific emission data such as those from the current experiment with data from climatically similar regions (perhaps in a weighted manner which accounts for the relative abundance of certain environmental conditions) along with modelling is a potentially resource‐efficient approach for refining national ammonia inventories.
Microstructural heterogeneity and mechanical anisotropy of 18Ni-330 maraging steel fabricated by selective laser melting: The effect of build orientation and height

Distinguished by a marked combination of high strength and high fracture toughness, 18Ni-300 maraging steel (MS) is widely used for intricate tool and die applications. MS is also amenable to the powder bed fusion additive manufacturing process, providing unique opportunities to make small features and incorporate cooling channels in molds. In this study, tensile test samples were fabricated using selective laser melting to investigate the effects of built height and orientations on the evolution of the microstructure and the mechanical properties of the samples. The microstructure of the as-fabricated samples consists of the primary a-martensite phase and fine cellular microstructure (~0.66–0.83 µm) with the retained austenite ? -phase aggregated at the boundaries of the cells, resulting in an enhanced mechanical performance compared with traditional counterparts under the same condition (without post-heat treatments). Random grain orientations with weak textures are revealed in all samples. The XY -built samples display better tensile performance when compared to the Z -built samples due to the fine grain sizes and the retained ? phase. The bottom of the Z -built sample exhibits a higher hardness than other parts of the sample, which could be attributed to its finer cellular structure.