bluuebunny/crossref_metadata_2025_split huggingface dataset:
Humidity control strategies in operation theatre Malaysia
Authors: Syafiq Syazwan Mustafa M , Yusop Fatimah , Amir Abdullah M D , Rahman M A A , Aini Mohd Sari Kamarul , Fahmi A R , Arif Rosli Mohd , Mohamed Sunar Norshuhaila , Hariri Azian 
Published: November 2019

Abstract
Hospital buildings are complex indoor facilities with variable uses and functions that are deals with a higher number of people. Therefore, the air-conditioning (AC) system should be used to keep good indoor air quality (IAQ) for patients and medical staff to meet comfort and health reasons. Operation theatre is one of the important and critical rooms in the hospital building. Usually, operation process will take 5 hours until 12 hours depends on the operation or patience condition. Operation theatres required 100% for fresh air intake and 100% for exhaust air. Therefore, this study analyses the indoor air quality in Operation Theater (OT) at Malaysia. Then focuses on the humidity control strategies using psychrometric chart. AC system and selected IAQ parameter been monitored to understanding the quality of air and energy usage. The result shows carbon monoxide (CO2), carbon dioxide (CO) and temperature (T) level were within the range stipulated in ASHRAE standard 62.1-2016 but relative humidity (RH) in operation theatre exceed the acceptable range. AC system showed the cooling energy usage as 90.1 kW and the heating required 5.6 kW in standard AC system operation. Psychrometric chart analysis to meet the desired temperature and relative humidity been proposed which contribute cooling energy usage was 95.9 kW and heating energy required 12.2kW. Recommendation alternative strategies to reduce cooling and heating energy been highlighted in this study.
Study on the preparation of Nylon 6 nanofibers by electrospinning on particle removal
Authors: Chen Xuan-Jun , Lin Min-Han , Chang Chang-Tang 
Published: November 2019

Abstract
In order to investigate the filterability of artificial fiber, salts were added to the fiber for particulate removal. In addition, nanofibers were prepared for particle filtration efficiency assessment, and Nylon 6 nanofibers were prepared by electrospinning. Scanning electron microscopy (SEM) was used for analyzing the fiber characteristics. Furthermore, the single-factor experimental method was used to study the optimal material preparation method and operating parameters, including content of different salts (NaCl and KCl), with Nylon 6 nanofibers for particle removal. The particle removal efficiency of pure Nylon 6 nanofibers was about 95%. The removal efficiencies of Nylon 6 nanofibers containing NaCl and KCl were 99% and 98%, respectively. It was found that the removal efficiency of nanofibers was decreased with increasing content of salts in Nylon 6 nanofibers.
Modification of a wideband spectral-acoustic method for controlling stress state of a face space
Authors: Shadrin A V , Kontrimas A A , Voroshylov Ya S , Bondar V A 
Published: November 2019

Abstract
To control and manage a stress state of an underground working face space it is important to measure the components of actual stresses. Traditional method for relieving a core-sample with central drill is time and labour consuming and is characterized by a lack of accuracy. To improve these issues geophysical methods which do not interfere with mining are to be used for controlling stress state. Acoustic methods are less time and labour consuming. Justification of spectral-acoustic method modification for controlling stress state of a face space is introduced. It is done on the basis of the dependence of the acoustic signal of the operating equipment amplitude-frequency response median on average stresses. The acoustic signal is recorded in the entire sensitivity band of the geophone. The description of a flow chart and operating principle of intrinsically safe portable device for implementing the modification in mines on the seams dangerous on gas and dust and prone to sudden coal and gas outbursts and rock bursts are given. The device operates in three modes: determining amplitudes of background noise and setting signal amplification coefficient; controlling stress state while generating continuous acoustic signal produced by operating mining equipment (combined machine, drilling device, plough-type machine) into the massif; control of stress state during generation a discrete acoustic signal produced by artificial source (heavy hammer strokes) into a massif.
Researching acoustic radiation spectrum of the mining equipment used for controlling stress state of a face space
Authors: Shadrin A V , Abramov I L 
Published: November 2019

Abstract
The procedure for estimating harmonic spectrum components of vibroacoustic disturbances produced by operating equipment and sounding acoustic signals which appear during the rock failure caused by operating body of a combined machine, drilling bit, plough-type machine, pneumatic coal pick, or impact effect of a special mechanism for realizing the method of continuous control of a face space stress state with the help of spectral acoustic method was worked out.
Perspective directions of development of oil refining industry in the regions of Russia
Authors: Filimonova I V , Provornaya I V , Dzyuba Y A , Tagaeva A A 
Published: November 2019

Abstract
Russia is a key player in the global liquid fuel market and acts as one of the world leaders in the extraction and refining of crude oil, as well as in the export of petroleum products. But for a long period of time, the Russian oil industry specialized in production, and only in early 2010 the problem of the development of the oil refining sector received due attention. However, the refining industry is still lagging behind in terms of efficiency, which is reflected in several key quality parameters: the Nelson complexity index; the share of straight-run fuel in the production of oil refineries; production of high-quality fuel per ton of refined raw materials. In this study, the authors conducted a comprehensive analysis of the current state and structure of the oil refining industry in Russia. Also, on the basis of the clustering method, oil refineries were grouped in terms of maximum similarity of indicator values. In the course of the study, the authors conducted a comprehensive analysis of the current state and structure of the oil refining industry in Russia. The purpose of the study was in conducting a comprehensive analysis of the current state and structure of the oil refining industry.
Forecast of profits from oil production in Russia with regional features of the natural resource base
Authors: Filimonova I V , Komorova A V , Nemov V Y , Mishenin M V , Kazanenkov V A 
Published: November 2019

Abstract
One of the main difficulties in the formation and increase of revenues from hydrocarbon resources is the deterioration of the quality of the mineral resource base and changes in the geography of production. One can observe an increase in the depletion and water content of the fields, an increase in the proportion of highly viscous and high-sulfur oil; the share of stocks in hard-to-reach and infrastructural underdeveloped regions is growing. One of the tools for encouraging subsoil users to develop such resources is to ensure lower rates of deductions to state bodies. The study presents an improved methodological approach to estimating and forecasting state budget revenues from hydrocarbon resources. The main stages of development are investigated and the main trends of the system of tax deductions from oil production are revealed. Explained the use of an approach focused on the forecast of production indicators of production, taking into account the structure of the mineral resource base. The calculations showed the need to reform the system of formation of government revenues from hydrocarbon resources. In the structure of government revenues from hydrocarbon resources, there is a tendency to increase the role of the mineral extraction tax in comparison with the export duty.
Seismic monitoring of hydrodynamic impact on coal seam at interval hydraulic fracturing
Authors: Klishin V I , Taylakov O V , Opruk G Yu , Makeev M P , Sokolov S V , Teleguz A S , Tatsienko A L 
Published: November 2019

Abstract
The article proves the importance of using interval hydraulic fracturing of coal seam for gas emission stimulation. The authors suggest using equipment for taking measures to intensify gas emission during implementation of hydraulic fracturing. They assess rock condition before and after hydrodynamic impact on coal seam by means of seismic reflection technique.
Development of automated control system for the mineral processing plant in the process of modernization
Authors: Lyakhovets M V , Wenger K G , Myshlyaev L P , Shipunov M V , Grachev V V , Makarov G V 
Published: November 2019

Abstract
The experience of retrofitting the automated process-control system at the mineral processing plant in the conditions of reconstruction of the mineral processing plant LLC JV “Barzasskoye Tovarishchestvo” (Beryozovskiy) is considered. The automated process-control system (APCS), retrofitting goals and ways to achieve them are indicated, the main subsystems of the integrated APCS are presented, and the enlarged functional and technical structure of the upgraded system is presented.
Algorithmic structure of control system of mine winder electric drive with a doubly-fed motor
Authors: Ostrovlyanchik V Yu , Popolzin I Yu 
Published: November 2019

Abstract
Usage of doubly-fed electric machine is a promising means to modernize asynchronous electric drives of mine winders based on wound rotor induction motor. To ensure a wide range of speed regulation, typical of mine widers, while maintaining the critical torque of the machine and its overload capacity, it is necessary to control amplitude, frequency and phase shift of the auxiliary voltage on the rotor. Since the frequency and phase shift determine the additional voltage argument, and the amplitude determines its modulus, then the speed control by changing the module and the argument is a non-trivial task requiring a special structure of control system of mine winder electric drive, as well as special regulators, and the system is non-linear. This article discusses the construction of a functional structural diagram of electric drive control system based on a doubly-fed motor, which allows the indicated features of controlling the speed of a doubly-fed machine to be taken into account by changing the parameters of the auxiliary voltage on the rotor.
Continuous monitoring system for soil gas migration in leaking Oil and Gas wells
Authors: Yurkevich Nikolay , Michurin Evgeny , Yurkevich Nataliya 
Published: November 2019

Abstract
The cost of repairing leaking Oil and Gas wells is of major concerns for operators and regulatory authorities. After each intervention is completed, the success of repair attempt is measured at surface by various devices. The current monitoring procedure is recognized as labour intensive, requiring field personnel to physically travel to wellsite and manually measure gas concentration levels with expensive hand-held instrumentation. Due to complex nature of surface casing vent flow and gas migration mechanisms, continuous monitoring with a real-time data access is a new paradigm for analyzing the repair success. This article presents a cost-effective and efficient system prototype for continuously monitoring surface casing vent flow and gas migration of methane concentration levels.
Population genetics shed light on species delimitation and life history of the Dyckia pernambucana complex (Bromeliaceae)
Authors: Pinangé Diego S B , Louzada Rafael B , Wöhrmann Tina , Krapp Florian , Weising Kurt , Zizka Georg , Polo Érico M , Wanderley Maria G L , Benko-Iseppon Ana M 
Published: November 2019

AbstractIn the Atlantic Rainforest located north of the São Francisco River (northeast Brazil), the humid enclaves called brejos de altitude play a significant role in the diversity dynamics of local flora and fauna. The related species Dyckia pernambucana and D. limae (Bromeliaceae) are characterized by their narrow endemic occurrence in such brejos, and their species status remains unclear. In order to understand the species delimitation in those assigned taxonomic entities, patterns of gene flow and genetic variability were calculated using nuclear and plastid microsatellites and AFLP markers. In this regard, we collected populations of the Pernambuco complex (D. limae and D. pernambucana, from the Borborema Plateau) and the closest relative D. dissitiflora (from the northern Espinhaço Range). Genetic diversity was moderate, despite the possible influence of genetic drift and selfing rates. Dyckia limae could not be undoubtedly discriminated from the remaining populations of Pernambuco, and we propose the synonymization of these species. Thus, the conservation of D. limae as a formerly single species would not reflect the conservation of the minimal gene pool of the studied lineage (D. pernambucana). We also propose the revalidation of the conservation status of this species, endemic to anthropomorphic island-like mountains environments. Finally, the associations found here were consistent with the historical patterns of colonization and fragmentation of the Atlantic Rainforest.
Comparative phylogeography, morphological boundaries and climate envelopes of two sympatric widespread Bromeliaceae from the southern Andes
Authors: Castello Lucia V , Chiapella Jorge O , Barfuss Michael H J , Till Walter , Quiroga M Paula , Premoli Andrea C 
Published: November 2019

AbstractWe studied the epiphytic species Tillandsia capillaris and T. virescens that grow as neotenic forms with autogamous and cleistogamous flowers. They have expanded in Andean mountain environments, where they grow sympatrically across most of their ranges in arid regions of Peru, central-western Bolivia and north-central Argentina and Chile. We studied the relationships between the two species and populations within each of them, the morphological boundaries and the climatic characterization of distinct genetic entities. We analysed 125 and 102 individuals from 25 and 27 populations of T. virescens and T. capillaris, respectively, by means of haplotype networks, phylogenetic and genetic structure analyses, using the plastid gene ycf1 (c. 4500 bp) to define genetic groups. Morphological studies by discriminant analyses and correlation with climatic variables extracted from WorldClim were used to test differentiations among the genetic groups within each species. We confirm that T. capillaris is a distinct entity and that T. virescens consists of three groups that diverged by vicariance from widespread ancestors. The high genetic diversity found in both species is consistent with the complex geography of the Andes and the Pleistocene glaciation cycles that have driven ecological speciation in both species reflected in the timing of divergence of the clusters.
Perceptions of primary care providers on TB care for migrants: a mixed methods study in Portugal
Authors: Tavares A M , Garcia A C , Gama A , Abecasis A B , Viveiros M , Dias S 
Published: November 2019

Abstract

Background
Tuberculosis (TB) is one of the main causes of death worldwide. In 2017, the proportion of TB cases among foreign-born individuals in Portugal was of 19%, and this proportion has been increasing. TB control among migrant populations largely depends on the role of the healthcare providers and their close contact with the patients. We aimed to explore the perspectives of primary care providers on the provision of TB care for migrant patients in Portugal.

Methods
An online survey and semi-structured interviews were conducted with healthcare providers from primary care settings in Portugal. Overall, 120 participated in the survey, and 17 were interviewed. Data from the survey and interviews were analysed using descriptive statistics and thematic analysis, respectively.

Results
Many participants (36.9%) considered that migrants arrive at an advanced stage of TB disease, and the main reason referred was migrants’ unawareness of the disease and its symptoms. Moreover, half (50.0%) of the providers considered that migrants frequently interrupt treatment, mainly due to their mobility, which causes difficulties in follow-up, and their social isolation that hampers social support. Overall, three main barriers for migrants’ access and use of TB care were mentioned: migrants’ low socioeconomic status, great bureaucracy required to register at services, and obstacles to benefit from social protection. Providers also suggested more training to improve their cultural competence and updating training on TB care.

Conclusions
Our study have shown social and economic factors that must be addressed to improve migrants’ access and use of TB care. In addition, increased health literacy for migrants and more training initiatives for providers can also contribute to improve TB care for migrants.

Key messages
Perspectives from primary care providers in Portugal highlighted social, economic, and administrative obstacles hampering the provision of TB care for migrants. With this work we expected to contribute with evidence to improve TB care for migrant patients in Portugal.
Ice-storm damage to trees in mixed Central European forests: damage patterns, predictors and susceptibility of tree species
Authors: Klopčič Matija , Poljanec Aleš , Dolinar Mojca , Kastelec Damijana , Bončina Andrej 
Published: November 2019

AbstractIn northern temperate forests, ice storms are a common disturbance agent, though climate change may alter their occurrence patterns. Their impact on forest ecosystems is complex, as they influence both structure and processes. In 2014, an ice storm of high intensity and large spatial extent occurred in Slovenia, Central Europe, which enabled a detailed study of ice damage to individual trees across a broader spatial scale. Pre- and post-ice storm measurement data on 11 414 trees on 960 permanent plots were used to examine ice damage patterns on trees in the disturbed forest area (~8700 km2) to determine the predictors of ice damage to trees and to investigate the relative susceptibility of eight groups of tree species in mixed Central European forests. We used a novel approach to modelling ice-storm intensity across the region based on measured data on air temperature, precipitation amount and duration, precipitation intensity and wind speed. The ice storm damaged 31 percent of the analysed trees; high variability in the damage rate was observed across the disturbed area. For the tree species, a susceptibility to ice damage index (SI) ranging between 0 (no damage) and 1 (complete damage) was calculated based on terrestrial assessment of trees. Tree species differed significantly in susceptibility to ice damage: Abies alba (SI = 0.14) and Quercus sp. (SI = 0.11) were rather resistant; Picea abies, Fagus sylvatica and Acer sp. (SI = 0.23–0.28) were moderately to very susceptible; and Pinus sp. (SI = 0.62) was extremely susceptible to ice damage. Eight predictors and three interactions were included in an ordinal logistic regression model of tree damage: ice damage on trees depends mainly on ice-storm intensity, elevation and tree species, whilst tree dbh and social status, tree size and tree species diversity indices and slope were relatively less important. Our study illustrates the complexity of damage patterns on trees due to ice storms and the significance of ice-storm intensity and tree species as predictors when modelling ice damage on individual trees.
The importance of fishing opportunity to angler utility analysis in marine recreational fisheries
Authors: Young Erik G , Melnychuk Michael C , Anderson Leif E , Hilborn Ray 
Published: November 2019

Abstract
Managers of recreational fisheries make assumptions about what anglers value, often emphasizing factors directly related to catch. Evaluations that include both catch and non-catch aspects of recreational fishing, as well as the trade-offs between attributes that are trip-based and those that measure opportunity over a season, are rarely be incorporated into management objectives and the design of management frameworks. A study of two marine recreational fisheries in the United States, Pacific halibut in central Oregon and red snapper in northeast Florida, comprised local interviews and a limited survey of recreational anglers to evaluate the relative importance of catch rates, season length, and the uncertainty around early closures. National meeting reports, interviews, and stated-preference survey results suggested that angling opportunity in the form of longer seasons may be more important to anglers than either catch rates or the uncertainty that results from mid-season changes to fishery closure dates. Results suggest that researchers evaluating economic benefits to anglers should consider including opportunity attributes directly in angler surveys. Issues associated with limited sample sizes and a lack of intermediate attribute values limit the use of this study for direct regulatory guidance, but it instead offers a potential methodology to be applied in future analyse.
Drivers of male sound production and effective communication distances at fish spawning aggregation sites
Authors: Rowell Timothy J , D’Spain Gerald L , Aburto-Oropeza Octavio , Erisman Brad E 
Published: November 2019

AbstractWhile monitoring fish sounds has enhanced our understanding of spatio-temporal patterns of spawning and acoustic communication, data interpretation often fails to account for environmental effects on acoustic recordings, resulting in uncertainty of whether measures of detected fish sounds correspond to rates of sound production, specific behaviours, and abundance. In this study, we applied acoustic propagation modelling and detection theory to estimate rates of sound production of territorial, male Gulf grouper (Mycteroperca jordani) from passive acoustic recordings and evaluate effective communication distances. To assess behavioural drivers, environmentally calibrated, hourly estimates of sound production rates were compared to diver observations of courtship, spawning, and numbers of females encountered within male territories. Rates of sound production increased before sunset and were correlated to observed rates of spawning and females encountered, indicating that sound production is largely driven by female presence and increased opportunities to spawn. The mean effective communication distance was estimated to be &lt;21 m, supporting the importance of short-range communication within the observed behaviours. Our findings corroborate that fish sounds can be used to infer measures of reproductive activity and the relative abundance of both sexes during spawning periods once properly calibrated for environmental effects and detection capabilities.