Miracle-dz/UniFAR-FTUs huggingface dataset:
The relationship between occupational stress and health consequences among the workers in regards with the perceived organizational support

DOI: 10.30699/jergon.6. 1.50 Article Info Received: Accepted: Published Online Journal of Ergonomics | ISSN: 1735-1960 Corresponding Information Original Article The Relationship Between Occupational Stress and Health Consequences Among the Workers in Regards with the Perceived Organizational Support Fariba Kiani1*, Tayebe Rahimi Pordanjani2, Ali Mohamadzadeh Ebrahimi2 1. Assistant Professor, Department of Psychology, Boroujen Branch, Islamic Azad University, Boroujen, Iran 2. Assistant Professor, Department of Psychology, Faculty of Humanities, University of Bojnord, Bojnord, Iran Fariba kiani Department of Psychology, Boroujen Branch, Islamic Azad University, Boroujen, Iran E-mail: fariba.kiani64@gmail.com Use your device to scan and read the article online Copyright © 2018, Journal of Ergonomics. This is an open-access article distributed under the terms of the Creative Commons Attribution-noncommercial 4.0 International License which permits copy and redistribute the material just in noncommercial usages, provided the original work is properly cited Background: The majority of research have led to interventions such as stress management design and have neglected the role of psychosocial factors in occupational stress. The aim of current research was to the relationship between occupational stress and health consequences among the workers in regards with the perceived organizational support. Methods: 211 individuals of Isfahan Steel Company were selected according to the stratified random sampling method and completed questionnaires about demography characteristics, Occupational stress, incident reporting rate and perceived organizational support. The collected data were analyzed by descriptive index and multiple regression analysis using SPSS18. Results: Results showed that there were significant relationships among perceived organizational support, Occupational stress and incident reporting rate (P<0.05). Also, hierarchy regression analysis showed that the relationship between Occupational stress and incident reporting rate was partially mediated by perceived organizational support (P<0.05). Conclusion: The results of this study indicate that perceived organizational support can modify the relationship between occupational stress and involvement in work accidents, and as a result, employees are less involved in risk behaviors and accidents are less caused by occupational stress.
Influence of 1-Hydroxyethylidene-1,1-Diphosphonic Acid on the Soft Tissue-Dissolving and Gelatinolytic Effect of Ultrasonically Activated Sodium Hypochlorite in Simulated Endodontic Environments

The addition of Dual Rinse HEDP, an etidronate powder, to a sodium hypochlorite (NaOCl) solution can create a combined single endodontic irrigant with a soft tissue-dissolving and a decalcifying effect, which can replace traditional alternating irrigation with chemically non-compatible solutions. While the short-term compatibility between NaOCl and 1-hydroxyethylidene-1,1-diphosphonic acid (HEDP) has been shown, it remains unclear whether ultrasonic activation of a combined NaOCl & HEDP solution immediately reduces the available chlorine and/or renders the NaOCl ineffective in dissolving organic tissue remnants. This was tested in three experiments: (1) direct activation in test tubes in an ultrasonic bath and then the activation by an ultrasonically oscillating tip (IrriSafe) in (2) an epoxy resin model containing a simulated isthmus filled with gelatin, and (3) extracted teeth with simulated resorption cavities filled with soft tissue. The control solutions were physiological saline and 2.5% NaOCl without HEDP. In (1), available chlorine after 30 s of ultrasonic activation (37 kHz) of test and control solution was assessed, as well as shrimp tissue weight loss in direct exposure. In (2) and (3), the ultrasonic tip was driven at 1/3 of full power using the respective unit, and areas of removed gelatin from the isthmus and tissue weight loss were used as the outcomes, respectively. Experiment (1) revealed no negative impact by HEDP on available chlorine (1), while all three experiments showed a highly significant (p > 0.001) synergistic effect, which was not hampered by HEDP, between NaOCl and ultrasonic activation regarding tissue weight loss (1, 3) and dissolution of gelatin (2).
Development of a High Pressure/High Temperature Down-hole Turbine Generator

As oil & natural gas deposits become more difficult to obtain by conventional means, wells must extend to deeper more heat-intensive environments. The technology of the drilling equipment required to reach these depths has exceeded the availability of electrical power sources needed to operate these tools. Historically, logging while drilling (LWD) and measure while drilling (MWD) devices utilized a wireline to supply power and communication from the operator to the tool. Lithium ion batteries were used in scenarios where a wireline was not an option, as it complicated operations. In current downhole applications, lithium ion battery (LIB) packs are the primary source for electrical power. LIB technology has been proven to supply reliable downhole power at temperatures up to 175 °C. Many of the deeper well s reach ambient temperatures above 200 °C, creating an environment too harsh for current LIB technology. Other downfalls of LIB technology are cost, limitations on charge cycles, disposal issues and possible safety hazards including explosions and fires. Downhole power generation can also be achieved by utilizing drilling fluid flow and converting it to rotational motion. This rotational motion can be harnessed to spin magnets around a series of windings to produce power proportional to the rpm experienced by the driven assembly. These generators are, in most instances, driven by turbine blades or moyno-based drilling fluid pumps. To date, no commercially available downhole power generators are capable of operating at ambient temperatures of 250 °C. A downhole power g enerator capable of operation in a 250 °C and 20,000 psi ambient environment will be an absolute necessity in the future. Dexter Magnetic Technologies’ High-Pressure High-Temperature (HPHT) Downhole Turbine Generator is capable of operating at 250 °C and 20, 000 psi, but has not been tested in an actual drilling application. The technology exists, but to date no company has been willing to test the tool.
Assessment of ultrabasic rock and volcanic tuff for the treatment of acid mine drainage

Metal-rich acid mine drainages (AMD) need to be treated appropriately prior to final discharge into the surrounding environment. In this study, the feasibility of using ultra basic rock (UBR) and volcanic tuff (VT) as treatment materials to remove heavy metals from AMD was investigated. Initially, the efficacy of the materials were tested using acidic aqueous metal solutions (pH=2.5; metal concentration; 10 mg/L) at different contact time, particle size and solid-solution ratio. Subsequently the materials were tested using AMD samples collected from Mamut Copper Mine pit. The initial and final metal concentrations (Cu, Fe, Mn and Zn) and final pH were the main parameters analysed. The results shows that the metal removal from aqueous solutions by both materials s dependant on contact time, particle size and solid solution ratio. The highest efficiency was achieved at 12 hours and 16 hours contact time (for UBR and VT respectively), particle size <0.5 mm and solid solution ratio 0.06 g/MI. Under this condition, the removal of Cu, Fe, Mn and Zn by UBR is 100, 100, 71 and 96%, respectively, while by VT is less efficient at 74, 91, 36 and 52%, respectively. The efficiency of UBR is closely associated with the ability of the material to increase the pH of solution (and the final pH attained) and subsequent precipitation of the metals. By contract, metal removal by VT is more likely associate with adsorption. When tested on AMD samples (at optimum condition), UBR resulted In 100, 100, 67 and 99% removal of Cu, Fe, Mn and Zn, respectively from mine pit sample and 90, 97,6 and 69%, respectively, from Nasapang drain sample. Comparatively, VT resulted in 96, 100, 67 and 92% respectively; from mine pit sample and 60, 98, 12 and 11%, respectively, from Nasapang drain sample. While the efficiency of either material is dependent on the AMD sample, the efficiency of VT is lower than UBR and has relatively greater potential compared to VT as treatment material for removal of heavy metals from AMD.
Black Hole Attack in Mobile Ad Hoc Networks: Challenges and Directions

A mobile ad hoc network (MANET) is a dynamic wireless network with no fixed infrastructure. The nodes move arbitrarily and are capable of communicating with each other without a central authority. MANETs are well suited for several situations such as emergencies, vehicular networks, and military operations. However, the flexible nature of MANET exposes it to attacks such as black hole attacks. The black hole attack is considered as one of the most predominant attacks that poses a threat to MANET. In this attack, an illegitimate node informs a source node of having the optimal route to the destination node, resulting in data packets being redirected and eventually dropped by this illegitimate node. Several works have been carried out to address this issue. This paper presents an overview of solutions proposed to mitigate black hole attacks, research limitations to the proposed works, and future works that need to be carried out.
A floating, negative-resistance voltage-controlled resistor

A negative-resistance, fully floating voltage-controlled resistor with wide input voltage range, and negative slope voltage-to-current characteristics passing through the origin with high linearity is presented. It is based on the bisection of the input voltage. Negative resistances have been achieved by using a voltage-controlled current source and one junction field effect transistor operating in nonsaturated region. Simulation results obtained for the input voltage ranges from -1 V to 1 V, from -3 V to 3 V, and from -5 V to 5 V show high linearity and frequency bandwidth between 1 MHz and 10 MHz.
Insight

Homeodomain transcription factors were first characterized in animals, in which they are key regulators of body plan development (Gehring, 1987). Indeed, the understanding of the manner in which homeobox-defined developmental pathways shape organismal form has been one of the triumphs of 20th century biology (Nusslein-Volhard, 1994). In 1991, the KNOTTED1 ( KN1 ) gene of maize was cloned and shown to encode a homeodomain protein (Vollbrecht et al., 1991). This demonstrated that homeobox genes are also key developmental regulators in plants. A series of dominant mutations in the KN1 locus condition a variety of developmental aberrations in the maize leaf. These include proximal (sheath) to distal (blade) tissue transformations and outgrowths of aberrantly differentiated tissue in association with the vasculature (Hake, 1992; Smith et al., 1992). KN1 defined a small family of genes (class1 KNOX genes) that share both sequence similarity and distinct functional features (Kerstetter et al., 1994). The KNOX subfamily of homeodomain proteins is distinct from other types of plant homeobox transcription factors that have a wide spectrum of functions in plant growth and development. KNOX genes are expressed in overlapping domains within the shoot apical meristem (SAM) and the unexpanded stem of higher plants (Jackson et al., 1994). However, KNOX proteins (and transcripts) are excluded from young leaf primordia. Indeed, exclusion of KNOX proteins from leaf founder cells (a group of cells in the meristem that is destined to form a leaf) is believed to be instrumental in the acquisition of leaf fate (Smith et al., 1992; Jackson et al., 1994). Ectopic expression of KNOX genes in leaves of different plants results in dramatic tissue Control of Shoot Cell Fate: Beyond Homeoboxes
Design of novel tri-frequency microstrip patch antenna with arc slots

A tri-frequency microstrip patch antenna with two pairs of arc slots is presented. For its single-feed and single-layer structure, the proposed antenna has a simple design process. In addition, the design can excite three operating bands by the two pairs of arc slots and the eight stub slots embedded on a square patch. The three operating bands are centred at 0.83, 1.8 and 2.46 GHz. Details of the proposed antenna and measured results are presented.
VLSI REVISITED – REVIVAL IN JAPAN

This paper describes the abundance of semiconductor consortia that have come into existence in Japan since the mid-1990s. They clearly reflect the ambition of the government – through its reorganized ministry METI and company initiatives - to regain some of the industrial and technological leadership that Japan has lost. The consortia landscape is very different in Japan compared with EU and the US. Outside Japan the universities play a much bigger and very important role. In Europe there has emerged close collaboration, among national government agencies, companies and the EU Commission in supporting the IT sector with considerable attention to semiconductor technologies. Another major difference, and possibly the most important one, is the fact that US and EU consortia include and mix partners from different areas of the semiconductor landscape including wafer makers, material suppliers, equipment producers and integrated device makers.
Baicalin Enhanced Oral Bioavailability of Sorafenib in Rats by Inducing Intestine Absorption

Background: Sorafenib (SOR) is an oral, potent, selective, irreversible epidermal growth factor receptor tyrosine kinase inhibitor (EGFR-TKI) used as the first-line therapy for advanced hepatocellular carcinoma (HCC). Baicalin (BG) is used as adjuvant therapy for hepatitis, which accounts for the leading cause of the development of HCC, and is commonly coadministered with SOR in clinic. The purpose of the current study was to characterize the pharmacokinetic changes of SOR and the potential mechanism when SOR is administered concomitantly with BG in rats for single and multiple doses. Methods: Parallel randomized pharmacokinetic studies were performed in rats which received SOR (50 mg/kg, i.g.) alone or coadministered with BG (160 mg/kg, i.g.) for single and multiple doses (7 days). Plasma SOR levels were quantified by ultra-performance liquid chromatography–tandem mass spectrometry (UPLC-MS/MS). Rat liver microsomes (RLMs) which isolated from their livers were analyzed for CYP3A and SOR metabolism activities. The inhibitory effect of BG on the metabolism of SOR was also assessed in pooled human liver microsomes (HLMs). The effects of BG on the intestine absorption behaviors of SOR were assessed in the in situ single-pass rat intestinal perfusion model. Results: Coadministration with BG (160 mg/kg, i.g.) for single or multiple doses significantly increased the Cmax, AUC0–t, and AUC0–∞ of orally administered SOR by 1.68-, 1.73-, 1.70-fold and 2.02-, 1.65-, 1.66- fold in male rats and by 1.85-, 1.68-, 1.68-fold and 1.57-, 1.25-, 1.24- fold in female rats, respectively (p < 0.01 or p < 0.05). In vitro incubation assays demonstrated that there were no significant differences of K m , V max , and CL int of 1-OH MDZ and SOR N-oxide in RLMs between control and multiple doses of BG-treated groups. BG has no obvious inhibitory effects on the metabolism of SOR in HLMs. In comparison with SOR alone, combining with BG significantly increased the permeability coefficient (P eff ) and absorption rate constant (K a ) of the SOR in situ single-pass rat intestinal perfusion model. Conclusion: Notably enhanced oral bioavailability of SOR by combination with BG in rats may mainly account for BG-induced SOR absorption. A greater understanding of potential DDIs between BG and SOR in rats makes major contributions to clinical rational multidrug therapy in HCC patients. Clinical trials in humans and HCC patients need to be further confirmed in the subsequent study.
Accurate and Reliable Sealant Inspection for Aircraft Fuel Tank Based on 3-D Point Cloud

As an important force-bearing component, aircraft fuel tank is localized at wings, fuselage, and empennage of an aircraft. To prevent the leakage or potential hazard of an aircraft fuel tank, the seal quality of fasteners on the fuel tank skin must be carefully inspected. Due to the limited space during inspection and its complex internal structures, it is challenging for current techniques to effectively inspect aircraft fuel tank. In this article, we introduce an aircraft sealant inspection system (ASInspS) to achieve accurate and reliable internal inspection for fuel tanks. For the hardware part, we utilize a high-precision 3-D scanner and a visual–inertial odometry (VIO) to acquire point clouds and poses, simultaneously. We then design three key modules to achieve the sealant inspection with high accuracy and reliability. First, the scanner positioning module aims to acquire the 6-D poses of the 3-D scanner, in which we propose two key improvements, that is, event-based mask (EvMask) and adaptive keyframe selection, to improve the robustness of feature tracking. Second, the seal area reconstruction module follows a coarse-to-fine strategy to achieve the accurate registration and then to create high-quality point cloud models of fuel tanks. Meanwhile, the results of fine alignment will be used to correct the accumulated drift error in the first module, which allows the system to ensure the high accuracy under complex scenes. Third, the sealant inspection module is built to conduct the accurate and reliable sealant measurement. The quantitative results demonstrate that our sealant inspection system can guarantee the precision (on different scales) at whatever the stage of the positioning, registration, or index measurement. The results also indicate that our ASInspS performs with high reliability even under a complex and closed aircraft fuel tank.
Effects of High-Forage Diets Containing Raw Flaxseeds or Soybean on In Vitro Ruminal Fermentation, Gas Emission, and Microbial Profile

Lipid metabolism plays an important role in the energy economy of ruminants. However, its interactions of fat, rumen fermentation, gas emission, and microorganisms are not yet clear. This study evaluated the effect of adding raw oilseeds to high-forage diets on in vitro ruminal fermentation, gas composition, and microbial profile. Three isoenergetic and isoproteic experimental diets were designed and used as fermentation substrate: control treatment (CON group) was the basal diet lacking oilseeds, the other two treatments were the basal diet supplemented by 100 g/kg dry matter (DM) raw whole soybean (S group) and 50 g/kg DM raw flaxseed (F group), respectively. Data showed that the acetate, butyrate, and total VFA concentration of culture fluids in the S group were lower (p < 0.05) than in the F group. There was a tendency to a higher level (p = 0.094) of propionate concentration in the F group compared with the other two groups. The gas production in the F group was higher (p < 0.05) than in the control group. There was a lower abundance of Sutterella (p < 0.05) and a greater abundance of Butyrivibrio (p < 0.05) in both of the two oilseed treatments. Methanobrevibacter (p = 0.078) in the F group was the lowest. Our results suggested that CH4 emission could be inhibited with flaxseed supplementation by propionate production metabolism, biohydrogenation of unsaturated fatty acid (FA), and toxicity to Methanobrevibacter, while regarding soybean seed supplementation, the emission of CH4 was more likely to be reduced through biohydrogenation of unsaturated FA modulated by Butyrivibrio.
Perna canaliculus as an Ecological Material in the Removal of o-Cresol Pollutants from Soil

Soil contamination with cresol is a problem of the 21st century and poses a threat to soil microorganisms, humans, animals, and plants. The lack of precise data on the potential toxicity of o-cresol in soil microbiome and biochemical activity, as well as the search for effective remediation methods, inspired the aim of this study. Soil is subjected to four levels of contamination with o-cresol: 0, 0.1, 1, 10, and 50 mg o-cresol kg−1 dry matter (DM) of soil and the following are determined: the count of eight groups of microorganisms, colony development index (CD) and ecophysiological diversity index (EP) for organotrophic bacteria, actinobacteria and fungi, and the bacterial genetic diversity. Moreover, the responses of seven soil enzymes are investigated. Perna canaliculus is a recognized biosorbent of organic pollutants. Therefore, microbial biostimulation with Perna canaliculus shells is used to eliminate the negative effect of the phenolic compound on the soil microbiome. Fungi appears to be the microorganisms most sensitive to o-cresol, while Pseudomonas sp. is the least sensitive. In o-cresol-contaminated soils, the microbiome is represented mainly by the bacteria of the Proteobacteria and Firmicutes phyla. Acid phosphatase, alkaline phosphatase and urease can be regarded as sensitive indicators of soil disturbance. Perna canaliculus shells prove to be an effective biostimulator of soil under pressure with o-cresol.
Combine Data Collecting and Task Computing: Progressive Computing in Internet of Things

Massive, heterogeneous sensors have been deployed to monitor many objects from multiple aspects, which brings the explosion of sensor data; thus, effective data collection becomes an important issue. Moreover, in emerging advanced IoT applications such as the smart city, computation tasks are released by smartphone users. Such tasks are random and unpredictable, which makes it hard to know in advance what sensor data are needed. Collecting all of the data that might be involved can lead to a huge waste of time, energy, and channel resources. In this article, we study effective sensor data collection problem and the goal is to fetch enough data to get the accurate results of random tasks with minimum cost. We propose a novel progressive computing method, where the sensor data are collected in phases. Specifically, in each collection phase, the server analyzes the data obtained in preview phases and determines what data to fetch in the next phase. Then, the server sends control messages to corresponding sensors by using the downlink communication of Lora. In our computing method, data collection is interwoven with task computing, which enables targeted approaches to the data exactly needed. Two example progressive algorithms are presented, and their performances are analyzed theoretically. Simulation results show that our algorithms can reduce the cost remarkably without loss in the accuracy of the computation results.