bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Influence of Situational Leadership and Employee Engagement on The Need of Achievement Motivation of Non-Supervisory Employee Heavy-duty Equipment Dealer in Balikpapan
Authors: Agung Pratama Chandra Bagus , Ratnasari Wahyu , Lestari Endah , Ariyani Linda Fauziyah 
Published: April 2021

Abstract
This study aims to analyse the influence of Situational Leadership, Employee Engagement on Achievement Motivation on 53 Employees of heavy equipment supplier agent companies in Balikpapan, which consists of some employees who are in the department of central rebuild component development (CRC) Balikpapan. The data analysis method used is structural equation modelling (SEM) with a partial least square (PLS) approach. The conclusions in this study have given us information that Situational Leadership does not always have a significant influence on need of achievement motivation with Original Sample (O) 0.128 because of differences in generation and probably some superior didn’t get Supervisory training or they never implementing how to handle team with situational leadership way. Employee Engagement has a positive and significant influence on achievement motivation with Original Sample (O) 0.742 because if there is no commitment and involvement, the company’s goals will not be achieved.
Optimal Control of diarrhea Disease model With Vaccination AND Treatment
Authors: Affandi Pardi , Salam Nur 
Published: April 2021

Abstract
This study aims to analyze the spread of diarrheal diseases using a SIR-(Susceptible-Infected-Recovered with Vaccination and Treatment) mathematical model and analyze the characteristics of the spread of diarrheal disease. Based on the model obtained, it can then be analyzed the stability criteria around the disease-free equilibrium point seen from its basic reproductive number. Next, perform Optimal Control by involving vaccines and treatments. Furthermore, by involving The Pontryagin’s maximum principle to complete the Mathematical Model of the Diarrhea Disease obtained.
An analytical approach to the cooling of a flat plate
Authors: Pagliarini L , Spiga M , Vocale P 
Published: April 2021

Abstract
The present work deals with the cooling of a flat plate having an initial non-homogeneous temperature distribution, which undergoes a sudden temperature drop at its surfaces. Hence, starting from an arbitrary steady-state temperature distribution, the two surfaces of the slab are suddenly cooled down to the value θ0, resulting in a strong perturbation of the initial temperature distribution. A general analytical solution is provided by adopting the variable separation technique to the Fourier equation in transient conditions, thus obtaining a general solution in terms of a very fast converging series, which includes a definite integral of the initial steady-state distribution. Common engineering applications are investigated and the related results, obtained thanks to an extremely low computational effort, are presented and discussed.
Transient free convection in open-ended vertical channels
Authors: Vocale P , Pagliarini L , Spiga M 
Published: April 2021

Abstract
The aim of the present work is to investigate the heat transfer for laminar natural convection of a fully developed flow in a chimney consisting of two parallel vertical plates with open ends, occurring due to a sudden change in temperature of one of the plates. The momentum conservation equation was analytically solved by applying the Laplace transform technique and the Green’s function method, resulting in the evaluation of the velocity field with a very low computational effort. The proposed analytical solution was adopted to assess the effect of the Prandtl number on the fluid behaviour of the flow. The results revealed that the steady-state velocity distribution is reached when the Fourier number became comparable with the Prandtl number, except for low values of the Prandtl number.
Sustainable and low-cost solutions for thermal and acoustic refurbishment of old buildings
Authors: Neri M , Levi E , Piana E A , Pujadas P , Cuerva E , Guardo A , Pilotelli M 
Published: April 2021

Abstract
This paper investigates the possibility to realize solutions for buildings thermal and acoustic refurbishment by using end-of-life household materials, such as cardboard, clothes, and egg-boxes. These solutions can be installed to improve the indoor quality in neighborhoods populated by people below the poverty threshold. The considered end-of-life household materials and their combination have been analyzed from the acoustic and thermal points of view. First of all, the sound insulation and the sound absorption properties have been determined by means of an impedance tube. Then, the summer and the winter thermal performances, when coupled to different wall systems, have been investigated analitically. The results suggest that good thermal and acoustic characteristics can be achieved in a contained thickness by coupling end-of-life household materials.
Solar assisted heat pump pilot plant management and troubleshooting by means of numerical modelling: a case study
Authors: Tagliafico L.A. , Cavalletti A. , Marafioti C. , Marchitto A. 
Published: April 2021

Abstract
A solar assisted heat pump integrated with fossil burners provides the space heating and Domestic Hot Water (DHW) demand of the sport palace Palacus, Genoa. The plant complexity requires a Data Acquisition System (DAS) to perform diagnoses for problem troubleshooting. A DAS with a set of sensors able to measure every key parameter of the plant loses economic feasibility as the installation complexity increases. This compulsory lack of information can be handled with numerical modelling calibrated on the collected data. In the case study, a net variation in the thermal losses during night (where all the plant is off and the facility is closed) within the DHW storage tanks has been measured. Without any apparent reason, the temperatures reached within the tank at 8.00 a.m. can be either 33 °C or 50 °C. According to the approach of inverse heat transfer problems, a numerical simulation in TRNSYS17 is used to enquire the most likely causes of failure and to establish new regulation criteria. Thermal stratification and its destruction are studied to better understand the temperature trend in the DHW tanks.
Liquid holdup optical measurements for horizontal stratified flows with an opaque fluid layer
Authors: Carraretto I M , Colombo L P M , Fasani D , Guilizzoni M G 
Published: April 2021

Abstract
This study presents a method to measure the void fraction in presence of a stratified three-phase flow with an opaque fluid like foam. The commonly used resistive probes, which were successfully applied for air-water flows, fail in detecting the liquid/foam interface due to the variable conductivity of foam. To overcome this problem, a new optical method was developed. A probe consisting of a steel rod covered in red vinyl plastic with a black measuring scale having 1 mm resolution was introduced radially into the flow; the foam layer, being opaque, can be easily identified against the measuring scale in a side view of the flow. The behavior over time of the liquid-foam interface was thus recorded through a video camera. A couple of small LED lamps provided the lighting to record the scene. The videos were then processed to count the measuring scale marks below the foam layer in order to get the instantaneous values of liquid layer depth. Measurements were performed at different pipe sections. The results were compared to those obtained for air-water flows at the same superficial velocities, with the latter ranging from 0.76 to 2.30 m/s for air and 0.03 to 0.06 m/s for water respectively. A liquid loading reduction up to 41 % was detected at the lowest gas superficial velocity, i.e. 1 m/s, while when the gas superficial velocity increases the difference in the liquid holdup lowers and becomes negligible at 2.30 m/s, regardless the value of the liquid superficial velocity. Since no specific model exists for foamy flows, as a first attempt the Zuber and Findlay drift-flux model was finally adopted to correlate the data.
Towards a two-dimensional readout of the improved CMS Resistive Plate Chamber with a new front-end electronics
Authors: Meola S. , Samalan A. , Tytgat M. , Zaganidis N. , Alves G.A. , Marujo F. , Torres Da Silva De Araujo F. , Da Costa E.M. , De Jesus Damiao D. , Nogima H. , Santoro A. , Fonseca De Souza S. , Aleksandrov A. , Hadjiiska R. , Iaydjiev P. , Rodozov M. , Shopova M. , Sultanov G. , Bonchev M. , Dimitrov A. , Litov L. , Pavlov B. , Petkov P. , Petrov A. , Qian S.J. , Cao P. , Kou H. , Liu Z. , Song J. , Zhao J. , Bernal C. , Cabrera A. , Fraga J. , Sarkar A. , Elsayed S. , Assran Y. , El Sawy M. , Mahmoud M.A. , Mohammed Y. , Combaret C. , Gouzevitch M. , Grenier G. , Laktineh I. , Mirabito L. , Shchablo K. , Bagaturia I. , Lomidze D. , Lomidze I. , Bhatnagar V. , Gupta R. , Kumari P. , Singh J. , Amoozegar V. , Boghrati B. , Ebraimi M. , Ghasemi R. , Mohammadi Najafabadi M. , Zareian E. , Abbrescia M. , Aly R. , Elmetenawee W. , De Filippis N. , Gelmi A. , Iaselli G. , Leszki S. , Loddo F. , Margjeka I. , Pugliese G. , Ramos D. , Benussi L. , Bianco S. , Piccolo D. , Buontempo S. , Di Crescenzo A. , Fienga F. , De Lellis G. , Lista L. , Paolucci P. , Braghieri A. , Salvini P. , Montagna P. , Riccardi C. , Vitulo P. , Francois B. , Kim T.J. , Park J. , Choi S.Y. , Hong B. , Lee K.S. , Goh J. , Lee H. , Eysermans J. , Uribe Estrada C. , Pedraza I. , Castilla-Valdez H. , Sanchez-Hernandez A. , Mondragon Herrera C.A. , Perez Navarro D.A. , Ayala Sanchez G.A. , Carrillo S. , Vazquez E. , Radi A. , Ahmad A. , Asghar I. , Hoorani H. , Muhammad S. , Shah M.A. , Crotty I. 
Published: April 2021

Abstract
As part of the Compact Muon Solenoid experiment Phase-II upgrade program, new resistive plate chambers will be installed in the region at low angle with respect to the beam collision axis, in order to improve the detection of muons with a low transverse momentum. High background conditions are expected in this region during the high-luminosity phase of the Large Hadron Collider, therefore an improved-RPC design has been proposed with a new front-end electronics to sustain a higher particle rate capability and better time resolution. A new technology is used in the front-end electronics resulting in low achievable signal detection of 1–20 fC. Crucial in the design of the improved-RPC is the capability of a two-dimensional readout in order to improve the spatial resolution, mainly motivated by trigger requirements. In this work, the first performance results towards this two-dimensional readout are presented, based on data taken on a real-size prototype chamber with two embedded readout planes with orthogonal strips.
Multiscale mapping of plant functional groups and plant traits in the High Arctic using field spectroscopy, UAV imagery and Sentinel-2A data
Authors: Thomson Eleanor R , Spiegel Marcus P , Althuizen Inge H J , Bass Polly , Chen Shuli , Chmurzynski Adam , Halbritter Aud H , Henn Jonathan J , Jónsdóttir Ingibjörg S , Klanderud Kari , Li Yaoqi , Maitner Brian S , Michaletz Sean T , Niittynen Pekka , Roos Ruben E , Telford Richard J , Enquist Brian J , Vandvik Vigdis , Macias-Fauria Marc , Malhi Yadvinder 
Published: April 2021

Abstract
The Arctic is warming twice as fast as the rest of the planet, leading to rapid changes in species composition and plant functional trait variation. Landscape-level maps of vegetation composition and trait distributions are required to expand spatially-limited plot studies, overcome sampling biases associated with the most accessible research areas, and create baselines from which to monitor environmental change. Unmanned aerial vehicles (UAVs) have emerged as a low-cost method to generate high-resolution imagery and bridge the gap between fine-scale field studies and lower resolution satellite analyses. Here we used field spectroscopy data (400–2500 nm) and UAV multispectral imagery to test spectral methods of species identification and plant water and chemistry retrieval near Longyearbyen, Svalbard. Using the field spectroscopy data and Random Forest analysis, we were able to distinguish eight common High Arctic plant tundra species with 74% accuracy. Using partial least squares regression (PLSR), we were able to predict corresponding water, nitrogen, phosphorus and C:N values (r
2 = 0.61–0.88, RMSEmean = 12%–64%). We developed analogous models using UAV imagery (five bands: Blue, Green, Red, Red Edge and Near-Infrared) and scaled up the results across a 450 m long nutrient gradient located underneath a seabird colony. At the UAV level, we were able to map three plant functional groups (mosses, graminoids and dwarf shrubs) at 72% accuracy and generate maps of plant chemistry. Our maps show a clear marine-derived fertility gradient, mediated by geomorphology. We used the UAV results to explore two methods of upscaling plant water content to the wider landscape using Sentinel-2A imagery. Our results are pertinent for high resolution, low-cost mapping of the Arctic.
Implementation of an Environmentally Friendly Approach of a Hospital–Practice of Medical Waste Disposal
Authors: Chen Chiwei 
Published: April 2021

Abstract
Gama Hospital is a well-known private hospital in Taiwan. In addition to medical treatment technology, hospital management and cost control are also excellent. Regarding the treatment of medical waste, one must consider the cost and also the environmental implications. Waste disposal, besides the inevitable treatment after its emergence, should be given more attention during the course of medical execution. In the practice of the hospital, the actual waste treatment cost was reduced. The main factor is that the hospital promotes a series of waste treatment education and training. In addition to medical personnel, patients and family members also participate in medical waste reduction and correct handling activities, successfully completing the hospital’s waste reduction target and achieving sustainable environmental social responsibility.
Investigation on the Development of Fuel Consumption for China’s Gasoline Passenger Car in Recent Years
Authors: Yu Hanzhengnan , Liu Yu , Li Jingyuan 
Published: April 2021

Abstract
As the application of several energy saving technologies and the continuous tightening fuel consumption standards, the fuel consumption of China’s gasoline passenger cars is decreasing continuously. In this paper, the development of the standards related to fuel consumption was reviewed firstly, and the development of the fuel consumption for China’s gasoline passenger cars has been investigated based on the declared fuel consumption data of over 4800 vehicle models produced or imported in recent 5 years (2014-2018). Results showed that the average fuel consumption in 2018 decreased 6.4% compared to 2014, about 1.6% per year. In additions, the development of gasoline passenger cars with turbocharge engines and auto transmissions had a more significant effect on the fuel consumption reduction, and the annual decreasing rate reached 2.4% per year and 3.6% per year, respectively.
Oxidative Desulfurization of Diesel from the Topping Plant using 1-Butyl-3-Methylimidazolium Hydrogen Sulfate [Bmim][HSO4] as Catalyst
Authors: Timbila Sara , Donoso Caterine , Mejía Francisco 
Published: April 2021

Abstract
This investigation was carried out with the purpose of reducing the sulphur content in diesel from the topping plant and avoiding air pollution, due to the presence of SOx in the emissions, at the same time reduced the corrosion rate in the equipment, machinery or mechanical components of the industry. An oxidative desulphurization (ODS) process was carried out with ionic liquid (1-butyl-3-methyl imidazolium hydrogen sulfate [BMIM][HSO4]) that serves as a solvent and catalyst. H2O2 (30 % wt) was used as an oxidizing agent, because it is benign to the environment. A maximum of 43.14% removal was obtained at a volumetric ratio VIL/Vdiesel (1:1), molar ratio H2O2/S (5) and reaction time (2 hours). In addition, the IL was evaluated after subjecting it to a regeneration process, being able to recycle it only once until it is saturated again; also the physical-chemical properties of diesel were studied before and after of exposed it to the ODS process.
Evaluation of Chromium Application in the Steel Industry in China: Implications on Environmental Quality
Authors: Musah Baba Imoro , Peng Lai , Xu Yifeng 
Published: April 2021

Abstract
This study provides vital analysis of environmental consequences of the steel industry in China on outdoor air quality, surface, and groundwater quality as well as global production of Chromite ore, its associated cost on health locally and internationally. The steel industry emissions currently amount to 50, 200, and 300 μg/m3 for PM2.5, SO2, and NO2 respectively exceeding WHO recommended emissions values. Out of 365 cities in China, 70% of these cities representing 256 cities in 2018 had their annual mean particulate matter emission being 44.1 μg/m3 which is significantly higher than the WHO standard. Imported chromite from 1996 to 2016 amounted to 106,090,000 Mt by China. The production of crude steel increased from 870.9 to 928.3 Mt in 2017 and 2018 respectively. The proportion of good groundwater quality reduced from 26.9 to 25.4% in three years. Nearly 68% of total chromium emissions come from the metallurgical industry with an annual increment of 15.6% with an annual average PM2.5 value of 53 ug/m3 which is significantly very high.
Nursing Home Wind Environment Evaluation in Northern China - A Case Study in Dezhou
Authors: Ni Xuwei 
Published: April 2021

Abstract
As the rapid development of institution-based care for the elderly people, the nursing home’s outdoor wind environment research has become an important topic including wind potential evaluation as well as wind comfort analysis. In this study, the wind environment of a nursing home located in Dezhou, northern China has been evaluated quantitatively according to CFD methods. The parameters related to the wind environment including average wind velocity, wind velocity variation range and area proportion of shadow wind, comfort wind and risky wind regions has been calculated. Results showed the annual average wind velocity of the nursing home’s outdoor environment was 1.69m/s and its variation range was 40.41%. The area proportions of shadow wind, comfort wind and risky wind regions were 23.00%, 75.35% and 1.65%. This indicated that the wind environment optimization of the nursing home should be focused on decreasing the shadow wind regions and dismiss the risky wind regions, and relative optimization suggestions were proposed.
Influence of non-uniform electric field distribution on the atmospheric pressure air dielectric barrier discharge
Authors: CUI Weisheng , ZHAO Shuai , QIAN Zhengfang , SUN Yiling , AL-SALIHI Mahmoud , DENG Xiangquan 
Published: April 2021

AbstractThe dielectric barrier discharge (DBD) in air at atmospheric pressure is not suitable for industrial applications due to its randomly distributed discharge filaments. In this paper, the influence of the electric field distribution on the uniformity of DBD is theoretically analyzed and experimentally verified. It is found that a certain degree of uneven electric field distributions can control the development of electron avalanches and regulate their transition to streamers in the gap. The discharge phenomena and electrical characteristics prove that an enhanced Townsend discharge can be formed in atmospheric-pressure air with a curved-plate electrode. The spectral analysis further confirms that the gas temperature of the plasma produced by the curved-plate electrode is close to room temperature, which is beneficial for industrial applications. This paper presents the relationship between the electron avalanche transition and the formation of a uniform DBD, which can provide some references for the development and applications of the DBD in the future.
Memory precision of object-location binding is unimpaired inAPOEε4-carriers with spatial navigation deficits
Authors: Gellersen Helena M , Coughlan Gillian , Hornberger Michael , Simons Jon S 
Published: April 2021

AbstractResearch suggests that tests of memory fidelity, feature binding and spatial navigation are promising for early detection of subtle behavioural changes related to Alzheimer’s disease. In the absence of longitudinal data, one way of testing the early detection potential of cognitive tasks is through the comparison of individuals at different genetic risk for Alzheimer’s dementia. Most studies have done so using samples aged 70 years or older. Here, we tested whether memory fidelity of long-term object-location binding may be a sensitive marker even among cognitively healthy individuals in their mid-60s by comparing participants at low and higher risk based on presence of the ε4-allele of the apolipoprotein gene (n = 26 ε3ε3, n = 20 ε3ε4 carriers). We used a continuous report paradigm in a visual memory task that required participants to recreate the spatial position of objects in a scene. We employed mixture modelling to estimate the two distinct memory processes that underpin the trial-by-trial variation in localization errors: retrieval success which indexes the proportion of trials where participants recalled any information about an object’s position and the precision with which participants retrieved this information. Prior work has shown that these memory paradigms that separate retrieval success from precision are capable of detecting subtle differences in mnemonic fidelity even when retrieval success could not. Nonetheless, Bayesian analyses found good evidence that ε3ε4 carriers did not remember fewer object locations [F(1, 42) = 0.450, P = 0.506, BF01 = 3.02], nor was their precision for the spatial position of objects reduced compared to ε3ε3 carriers [F(1, 42) = 0.12, P = 0.726, BF01 = 3.19]. Because the participants in the sample presented here were a subset of a study on apolipoprotein ε4-carrier status and spatial navigation in the Sea Hero Quest game [Coughlan et al., 2019. PNAS, 116(9)], we obtained these data to contrast genetic effects on the two tasks within the same sample (n = 33). Despite the smaller sample size, wayfinding deficits among ε3ε4 carriers could be replicated [F(1, 33) = 5.60, P = 0.024, BF10 = 3.44]. Object-location memory metrics and spatial navigation scores were not correlated (all r &lt; 0.25, P &gt; 0.1, 0 &lt; BF10 &lt; 3). These findings show spared object-location binding in the presence of a detrimental apolipoprotein ε4 effect on spatial navigation. This suggests that the sensitivity of memory fidelity and binding tasks may not extend to individuals with one ε4-allele in their early to mid-60s. The results provide further support to prior proposals that spatial navigation may be a sensitive marker for the earliest cognitive changes in Alzheimer’s disease, even before episodic memory.
EFFECT OF TRISOMY 6 ON RECOMBINATION IN CHROMOSOME 9 OF MAIZE
Authors: Ghidoni A 
Published: April 2021

ABSTRACT
The effect of an additional chromosome 6 upon recombination in chromosome 9 was investigated in maize. Trisomic 6 plants and their disomic sibs, heterozygous for three loci of chromosome 9 (yg, sh and wx), were testcrossed, and recombination in the regions yg-sh and sh-wx was analyzed. Single exchanges in the sh-wx region and double exchanges were more frequent in trisomics, particularly in female flowers.——In reciprocal testcrosses, higher male crossover rates were found for the sh-wx region, and the difference was enhanced in trisomic 6 plants.
REGULATION OF NEWLY EVOLVED ENZYMES II. THE EBG REPRESSOR
Authors: Hall Barry G , Hartl Daniel L 
Published: April 2021

ABSTRACT
The ebg (evolved β-galactosidase) regulatory locus has been mapped. The map order is argG-ebgA-ebgR-tolC-metC, and there is 1.6% recombination between ebgR and ebgA. Studies with ebgR-/ebgR+ merdiploids have shown that ebgR- is recessive, and it is concluded that the synthesis of ebg enzyme is under negative control.