bluuebunny/crossref_metadata_2025 huggingface dataset:
Development of a Reproducible Prognostic Gene Signature to Predict the Clinical Outcome in Patients with Diffuse Large B-Cell Lymphoma
Authors: Zamani-Ahmadmahmudi Mohamad , Nassiri Seyed Mahdi
Published: August 2019

Alongside various clinical prognostic factors for diffuse large B-cell lymphoma (DLBCL) such as the international prognostic index (IPI) components (ie, age, tumor stage, performance status, serum lactate dehydrogenase concentration, and number of extranodal sites), prognostic gene signatures have recently shown promising efficacy. However, previously developed signatures for DLBCL suffer from many major inadequacies such as lack of reproducibility in external datasets, high number of members (genes) in a signature, and inconsistent association with the survival time in various datasets. Accordingly, we sought to find a reproducible prognostic gene signature with a minimal number of genes. Seven datasets—namely GSE10856 (420 samples), GSE31312 (470 samples), GSE69051 (157 samples), GSE32918 (172 samples), GSE4475 (123 samples), GSE11318 (203 samples), and GSE34171 (91 samples)—were employed. The datasets were randomly categorized into training (1219 samples comprising GSE10856, GSE31312, GSE69051, and GSE32918) and validation (417 samples consisting of GSE4475, GSE11318, and GSE34171) groups. Through the univariate Cox proportional hazards analysis, common genes associated with the overall survival time with a P value less than 0.001 and a false discovery rate less than 5% were identified in 1219 patients included in the 4 training datasets. Thereafter, the common genes were entered into a multivariate Cox proportional hazards analysis encompassing the common genes and the international prognostic index (IPI) factors as covariates, and then only common genes with a significant level of difference (P < 0.01 and z-score >2 or <−2) were selected to reconstruct the prognostic signature. After the analyses, a 7-gene prognostic signature was developed, which efficiently predicted the survival time in the training dataset (Ps < 0.0001). Subsequently, this signature was tested in 3 validation datasets. Our signature was able to strongly predict clinical outcomes in the validation datasets (Ps < 0.0001). In the multivariate Cox analysis, our outcome predictor was independent of the routine IPI components in both training datasets (Ps < 0.0001). Furthermore, our outcome predictor was the most powerful independent prognostic variable (Ps < 0.0001). We developed a potential reproducible prognostic gene signature which was able to robustly discriminate low-risk patients with DLBCL from high-risk ones.
Author Correction: Human brain patterns underlying vigilant attention: impact of sleep debt, circadian phase and attentional engagement
Authors: Maire Micheline , Reichert Carolin F. , Gabel Virginie , Viola Antoine U. , Phillips Christophe , Berthomier Christian , Borgwardt Stefan , Cajochen Christian , Schmidt Christina
Published: August 2019

An amendment to this paper has been published and can be accessed via a link at the top of the paper
Publisher Correction: Metabolic phenotype of breast-fed infants, and infants fed standard formula or bovine MFGM supplemented formula: a randomized controlled trial
Authors: He Xuan , Parenti Mariana , Grip Tove , Domellöf Magnus , Lönnerdal Bo , Hernell Olle , Timby Niklas , Slupsky Carolyn M.
Published: August 2019

An amendment to this paper has been published and can be accessed via a link at the top of the paper
A novel noninvasive method for remote heart failure monitoring: the EuleriAn video Magnification apPLications In heart Failure studY (AMPLIFY)
Authors: Abnousi Freddy , Kang Guson , Giacomini John , Yeung Alan , Zarafshar Shirin , Vesom Nicholas , Ashley Euan , Harrington Robert , Yong Celina
Published: August 2019

Current remote monitoring devices for heart failure have been shown to reduce hospitalizations but are invasive and costly; accurate non-invasive options remain limited. The EuleriAn Video Magnification ApPLications In Heart Failure StudY (AMPLIFY) pilot aimed to evaluate the accuracy of a novel noninvasive method that uses Eulerian video magnification. Video recordings were performed on the neck veins of 50 patients who were scheduled for right heart catheterization at the Palo Alto VA Medical Center. The recorded jugular venous pulsations were then enhanced by applying Eulerian phase-based motion magnification. Assessment of jugular venous pressure was compared across three categories: (1) physicians who performed bedside exams, (2) physicians who reviewed both the amplified and unamplified videos, and (3) direct invasive measurement of right atrial pressure from right heart catheterization. Motion magnification reduced inaccuracy of the clinician assessment of central venous pressure compared to the gold standard of right heart catheterization (mean discrepancy of −0.80 cm H2O; 95% CI −2.189 to 0.612, p = 0.27) when compared to both unamplified video (−1.84 cm H2O; 95% CI −3.22 to −0.46, p = 0.0096) and the bedside exam (−2.90 cm H2O; 95% CI −4.33 to 1.40, p = 0.0002). Major categorical disagreements with right heart catheterization were significantly reduced with motion magnification (12%) when compared to unamplified video (25%) or the bedside exam (27%). This novel method of assessing jugular venous pressure improves the accuracy of the clinical exam and may enable accurate remote monitoring of heart failure patients with minimal patient risk.
Exosome-specific tumor diagnosisviabiomedical analysis of exosome-containing microRNA biomarkers
Authors: Fan Zhijin , Yu Jun , Lin Jingyan , Liu Ying , Liao Yuhui
Published: August 2019

A novel exosome-specific tumor diagnosis strategy was constructed by integrating the rapid magnetic exosome-enrichment platform and the Ru(bpy)32+-polymer amplified electrochemiluminescence (ECL) strategy.
FTIR bio-spectroscopy scattering correction using natural biological characteristics of different cell lines
Authors: Hariri Sara , Barzegari B. Sahar , Keshavarz F. Kamyar , Nikounezhad Nastaran , Safaei Behnoosh , Farnam Golrokh , Shirazi Farshad H
Published: August 2019

The Mie type scattering makes the FTIR spectra of biological samples unreliable. Here, natural biological characteristics have been used instead of mathematical estimations to solve the scattering problem, which resulted the best corrected spectra of cells.
Development of a ratiometric two-photon fluorescent probe for imaging of hydrogen peroxide in ischemic brain injury
Authors: Zhai Baoping , Hu Wei , Hao Ruilin , Ni Wenjing , Liu Zhihong
Published: August 2019

We developed a novel ratiometric two-photon fluorescent probe for tracking H2O2 in BV-2 cells and brain tissue. This work will help to understand the relationship between the hypoxic-ischemic process and H2O2.
Determination of short-chain fatty acids in feces by capillary electrophoresis with indirect UV-VIS detection
Authors: Hodek Ondřej , Křížek Tomáš
Published: August 2019

A capillary electrophoresis method enables quantification of acetate, propionate, isobutyrate and butyrate in human and canine feces.
Domino N-/C- or N-/N-/C-arylation of imidazoles to yield polyaryl imidazolium salts via atom-economical use of diaryliodonium salts
Authors: Li Shiqing , Lv Hongxu , Yu Yu , Ye Xiuqing , Li Baisong , Yang Songming , Mo Yanru , Kong Xiangfei
Published: August 2019

A Cu-mediated domino di-/triarylation reaction of imidazoles in a single step by using two aryls as well as an anion of a diaryliodonium salt is developed to quickly achieve polyaryl imidazolium salts.
Crystal structure of a protein–aromatic foldamer composite: macromolecular chiral resolution
Authors: Alex Jimi M. , Corvaglia Valentina , Hu Xiaobo , Engilberge Sylvain , Huc Ivan , Crowley Peter B.
Published: August 2019

A protein–foldamer crystal structure illustrates protein assembly by a sulfonated aromatic oligoamide, and chiral resolution of the foldamer helix handedness.
Phosphorylation dependent α-synuclein degradation monitored by in-cell NMR
Authors: Zheng Wenwen , Zhang Zeting , Ye Yansheng , Wu Qiong , Liu Maili , Li Conggang
Published: August 2019

Here we report the dephosphorylation and proteolysis of phosphorylated α-synuclein, a Parkinson's disease-related protein, in living cells in a time resolved manner using in-cell NMR.
Hypsochromic solvent shift of the charge separation band in ionic donor–acceptor Li+@C60⊂[10]CPP
Authors: Stasyuk Anton J. , Stasyuk Olga A. , Solà Miquel , Voityuk Alexander A.
Published: August 2019

Photoinduced electron transfer in CPP-based donor–acceptor complexes C60⊂[10]CPP and Li+@C60⊂[10]CPP was studied using DFT/TDDFT. Unusual blue shift of charge separated states for Li+@C60⊂[10]CPP complexes in the polar medium is predicted.
A directly grown pristine Cu-CAT metal–organic framework as an anode material for high-energy sodium-ion capacitors
Authors: Zhou Wan , Lv Si , Liu Xiaolin , Li Yuanyuan , Liu Jinping
Published: August 2019

Conductive MOF nanowires with metal catechol structures are synthesized on compressed nickel foam and directly used in sodium ion capacitors for the first time.
Brownian dynamics assessment of enhanced diffusion exhibited by ‘fluctuating-dumbbell enzymes’
Authors: Kondrat Svyatoslav , Popescu Mihail N.
Published: August 2019

Numerical simulations show moderate diffusion enhancements for fluctuating-dumbbell enzyme models.
Exploring the mechanism of hypochlorous acid decomposition in aqueous solutions
Authors: Busch Michael , Simic Nina , Ahlberg Elisabet
Published: August 2019

The fundamental chemistry of hypochlorous acid in water is explored and mechanisms for the decomposition to either chlorate or oxygen are proposed.
closo-Carboranes as dual CH⋯π and BH⋯π donors: theoretical study and biological significance
Authors: Frontera Antonio , Bauzá Antonio
Published: August 2019

In this manuscript the ability ofcloso-carboranes to establish CH⋯π and BH⋯π interactions with several aromatic moieties exhibiting different electronic natures has been evaluated at the PBE0-D3/def2-TZVP level of theory.
Mechanisms of ammonia and hydrazine synthesis on η-Mn3N2-(100) surfaces
Authors: Zeinalipour-Yazdi Constantinos D.
Published: August 2019

The mechanisms of ammonia and hydrazine synthesis have been studied on (100) surfaces of Mn3N2.
Enhanced electrocatalytic dechlorination of 2,4-dichlorophenoxyacetic acid on in situ prepared Pd-anchored Ni(OH)2 bifunctional electrodes: synergistic effect between H* formation on Ni(OH)2 and dechlorination steps on Pd
Authors: Song Shuang , Liu Qiuxiang , Fang Jinhui , Yu Weiting
Published: August 2019

Enhanced dechlorination efficiency is achieved through a synergistic effect: H* formation on Ni(OH)2 and dechlorination steps on Pd.
Graphene-based advanced nanoplatforms and biocomposites from environmentally friendly and biomimetic approaches
Authors: Ma Lang , Zhou Mi , He Chao , Li Shuang , Fan Xin , Nie Chuanxiong , Luo Hongrong , Qiu Li , Cheng Chong
Published: August 2019

Environmentally friendly and biomimetic approaches to fabricate graphene-based advanced nanoplatforms and biocomposites for biomedical applications are summarized in this review.
Optimisation of the preservation conditions for molecularly imprinted polymer nanoparticles specific for trypsin
Authors: Safaryan Abeer H. M. , Smith Adam M. , Bedwell Thomas S. , Piletska Elena V. , Canfarotta Francesco , Piletsky Sergey A.
Published: August 2019

Molecularly imprinted polymer nanoparticles are shown as stable after lyophilisation, autoclaving and other common sterilisation techniques, which further extends their shelf-life and is paramount for their application in Life Sciences.
Synthesis and characterization of analogues of glycine-betaine ionic liquids with the 4-chlorosalicylate anion and their use in the extraction of copper(ii) ions
Authors: Diabate Pape Diaba , Boudesocque Stéphanie , Kowandy Christelle , Dupont Laurent , Mohamadou Aminou
Published: August 2019

5 analogues of glycine-betainium associated with the 4-chlorosalicylate anion have been synthesized and their used in the extraction of aqueous Cu2+ ions show that the extraction efficiency depends much more on the nature of the metal counter ion.
A novel synthetic approach for designing metal-free, redox-active quinoxaline-benzimidazole-based organic polymers with high energy storage capacity
Authors: Salunkhe Pravin S. , Patil Yuvraj S. , Dhole Indrajeet A. , Kalshetti Basavraj S. , Patil Vikas B. , Mane Shivshankar R. , Ghanwat Anil A.
Published: August 2019

We established the first use of thiophene integrated with a quinoxaline-benzimidazole unit for energy storage applications and delivered strategies for further developments in the performance of such materials.
Review of liquid nano-absorbents for enhanced CO2capture
Authors: Yu Wei , Wang Tao , Park Ah-Hyung Alissa , Fang Mengxiang
Published: August 2019

Liquid nano-absorbents, such as amine-based nanofluids and nanoparticle organic hybrid materials, have exhibited enhanced CO2capture behaviors.
The hydrogenation of mandelonitrile over a Pd/C catalyst: towards a mechanistic understanding
Authors: McAllister Mairi I. , Boulho Cédric , McMillan Liam , Gilpin Lauren F. , Brennan Colin , Lennon David
Published: August 2019

A carbon supported Pd catalyst is used in the liquid phase hydrogenation of the aromatic cyanohydrin mandelonitrile (C6H5CH(OH)CH2CN) to afford the primary amine phenethylamine (C6H5CH2CH2NH2).
Exothermic laws applicable to the degradation of o-phenylenediamine in wastewater via a Fe3+/H2O2 homogeneous quasi-Fenton system
Authors: Yan Yuntao , Mao Yanpeng , Dong Yong , Zhang Ke , Sun Xiaofei , Ma Chunyuan
Published: August 2019

The external consumption and the self-consumption of reactive oxygen species are found to be the main exothermic reactions.
CIDNP as a tool to unveil the reaction mechanism: interaction of mixed phosphonium–iodonium ylide withp-methoxyphenylacetylene
Authors: Levina Irina I. , Tarasov Valery F. , Podrugina Tatyana A. , Nekipelova Tatiana D.
Published: August 2019

CIDNP in31P NMR spectra of major products in the course of the reaction between phosphonium–iodonium ylide andp-methoxyphenylacetylene reveals the mechanism of products formationviaradical pair.
Improving selectivity of CO reduction via reducing the coordination of critical intermediates
Authors: Li Yifan , Qian Yumin , Ji Yujin , Li Hui , Liu Yuanyue
Published: August 2019

Reducing the coordination of critical intermediates can improve the selectivity of electrochemical CO reduction.
Fluorine substitution enabling pseudocapacitive intercalation of sodium ions in niobium oxyfluoride
Authors: Wu Yilan , Fan Xin , Chen Yinjuan , Gaddam Rohit Ranganathan , Yu Feng , Xiao Changlong , Lin Chunfu , Zhao Qinglan , Sun Xiaoming , Wang Hongxia , Liu Chenguang , Li Jun , Zhao Xiu Song
Published: August 2019

A collaborative materials engineering of an orthorhombic niobium oxyfluoride/carbon nanobelt anode provides enhanced sodium-ion storage through a combination of pseudocapacitive intercalation and conversion mechanisms.
Correction: Tailoring the ORR and HER electrocatalytic performances of gold nanoparticles through metal–ligand interfaces
Authors: Alba-Molina David , Puente Santiago Alain R. , Giner-Casares Juan J. , Rodríguez-Castellón Enrique , Martín-Romero María T. , Camacho Luis , Luque Rafael , Cano Manuel
Published: August 2019

Correction for ‘Tailoring the ORR and HER electrocatalytic performances of gold nanoparticles through metal–ligand interfaces’ by David Alba-Molina et al., J. Mater. Chem. A, 2019, DOI: 10.1039/c9ta05492h.
Electronics from solution-processed 2D semiconductors
Authors: Gao Xiangxiang , Bian Gang , Zhu Jian
Published: August 2019

We present the recent progress in the synthesis, assembly, and electronic applications of solution-processed 2D semiconductors.
Dual‐channel trench‐gate tunnel FET for improved ON‐current and subthreshold swing
Authors: Joshi T. , Singh Y. , Singh B.
Published: August 2019

In this Letter, a dual‐channel trench‐gate tunnel field‐effect transistor (DCTG‐TFET) is proposed and investigated. The gate of DCTG‐TFET is placed vertically in a trench to create two channels which carry drain current in parallel. The proposed device dimensions are optimised to reduce channel resistance and tunnelling width for an appreciable increase in the ON‐state current (). The performance of DCTG‐TFET is analysed using two‐dimensional simulations in the device simulator. The proposed DCTG‐TFET provides one order of magnitude improvement in / current ratio and 17 times reduction in subthreshold swing as compared to recently reported two‐source‐region tunnel field‐effect transistor structure.
Clustering‐based method for the feeder selection to improve the characteristics of load shedding
Authors: Potel Barnabé , Cadoux Florent , De Alvaro Garcia Leticia , Debusschere Vincent
Published: August 2019

Under‐frequency load shedding (UFLS) schemes are designed by specifying a given amount of load to shed at various frequency thresholds to prevent the collapse of the electrical power system in the event of a large generation‐load imbalance. An UFLS step is constituted of a group of medium‐voltage feeders that trip when a given frequency threshold is reached. This study focuses on the method to be used when allocating a given feeder to a given step. First, the authors introduce performance metrics to quantify the accuracy level with which the UFLS target is met. Second, they model: the allocation method currently used in France; a variant of that method; and a new method introduced in this study, based on an automated clustering technique. Third, based on real consumption patterns measured from a vast area in France, and using the introduced performance metrics, they compare the efficiency of the three described methods. This study is conducted for the current state of loading of the considered distribution network and for a hypothetical situation with an increased share of distribution‐side photovoltaic generation. For the chosen performance metrics, they demonstrate that the first two methods provide similar results while the clustering‐based method performs remarkably better.
PLE‐based estimators for RSSD source localisation with unknown transmitted power in wireless sensor networks
Authors: Heydari Ali , Aghabozorgi Masoud Reza
Published: August 2019

Source localisation based on the received signal strength difference (RSSD) for unknown transmitted power of the source is attractive due to the low cost and simple implementation. This study focuses on the pseudo‐linear estimator (PLE) with a low computational closed form solution. The authors present least squares calibration (LSC) estimator, linear least squares (LLS) estimator and their best linear unbiased estimator (BLUE) variants (namely, the BLUE‐LSC and BLUE‐LLS estimators), then they show all these estimators are biased estimators due to the correlation between system matrix and PLE noise vector. To overcome this problem, a bias elimination method is presented using closed instrumental variable (IV). To achieve the Cramer–Rao lower bound for sufficiently small noise scenario an improved weighting IV (IWIV) estimator is presented. At the end of this study, simulation results verify the theoretical development.
CHANG-ES
Authors: Mora-Partiarroyo Silvia Carolina , Krause Marita , Basu Aritra , Beck Rainer , Wiegert Theresa , Irwin Judith , Henriksen Richard , Stein Yelena , Vargas Carlos J. , Heesen Volker , Walterbos René A. M. , Rand Richard J. , Heald George , Li Jiangtao , Kamieneski Patrick , English Jayanne
Published: August 2019

Aims. NGC 4631 is an interacting galaxy which exhibits one of the largest gaseous halos observed among edge-on galaxies. We aim to examine the synchrotron and polarization properties of its disk and halo emission with new radio continuum data.

Methods. Radio continuum observations of NGC 4631 were performed with the Karl G. Jansky Very Large Array at C-band (5.99 GHz) in the C and D array configurations, and at L-band (1.57 GHz) in the B, C, and D array configurations. The Rotation Measure Synthesis algorithm was utilized to derive the polarization properties.

Results. We detected linearly polarized emission at C-band and L-band. The magnetic field in the halo is characterized by strong vertical components above and below the central region of the galaxy. The magnetic field in the disk is only clearly seen in the eastern side of NGC 4631, where it is parallel to the plane of the major axis of the galaxy. We detected for the first time a large-scale, smooth Faraday depth pattern in a halo of an external spiral galaxy, which implies the existence of a regular (coherent) magnetic field. A quasi-periodic pattern in Faraday depth with field reversals was found in the northern halo of the galaxy.

Conclusions. The field reversals in the northern halo of NGC 4631, together with the observed polarization angles, indicate giant magnetic ropes with alternating directions. To our knowledge, this is the first time such reversals are observed in an external galaxy.
Interfaces Used for Smartglass Devices into the Augmented Reality Projects
Authors: Olar Marius Leonard , Risteiu Marius-Nicolae , Leba Monica
Published: August 2019

This paper addresses the themes of the interfaces for the devices usable in the virtual reality projects, respectively augmented reality. Smart goggles are typically used to implement these. Today’s device interfaces are designed for use on flat screens, such as monitors, TVs, or smart phone screens. These screens are located some distance away from the eyes of the user, while the lenses of the smart glasses will be just a few millimeters away. Intelligent eyeglass interfaces will have several patterns, some framed in the user’s field of view, others will require sliding on their surface. Everyone’s field of view is unique, and this will require a calibration of the device so that the graphics can be readable.
Reimagining vision with infinity mirrors
Authors: Panaite Arun Fabian , Bogdanffy Lorand
Published: August 2019

This paper studies the possibility of interfacing motion control of an infinity mirror by using viewer eye tracking and the advantages and drawbacks of such an interface.
Studies on wheel mounting options on shafts
Authors: Purcar Carmen , Bădescu Mircea , Inţă Marinela
Published: August 2019

The paper presents a general description of chains and chain transmissions, their advantages and disadvantages. A triple chain wheel is then projected into the CATIA V5 program. A static analysis of some wheel mounting variants on a camshaft with the Generative Structural Analysis module in the CATIA V5 program is then made. The orientation-fastening variants with a wedge, two feathers or three screws positioned equidistant at 120 degrees on a diameter are analysed. As a result of the finite element analysis, the conclusion is that the three-screw variant is the most appropriate. Material stresses and deformations are smaller, simpler processability, fewer types of components are present overall, maintenance is simpler, and the excentricity of the assembly is lower, with lower vibrations in operation.
Remanent battery capacity estimation for autonomous ground industrial vehicles
Authors: Savu Tom , Jugravu Bogdan Alexandru
Published: August 2019

When travelling in an industrial system for completing their assigned tasks, autonomous ground vehicles must estimate the remanent capacity of their batteries and decide if they are able to assume the next task and afterward travel to the charging or replacement station. The amount of energy needed for moving on a certain distance depends on a set of parameters belonging to the vehicle, to the runway and to the vehicle’s trajectory. The paper proposes a model for estimating the remaining capacity of the batteries after a certain distance would be covered by a vehicle. Parameters values were obtained by simulation, capacity loss was computed using the proposed model and then a neural network was taught to perform the estimation. The neural network was further used to simulate the situation when a vehicle is estimating the needed capacity before accepting a task to be performed. The results proved that the model and the network, even developed using low data volume and processing time, are able to provide accurate enough estimations and are able to allow future developments.
Increasing the Wear Resistance of Metallic Materials by applying Thermochemical Treatments
Authors: Ciofu Florin
Published: August 2019

Wear is defined as mechanical or physical damage to a contact surface by another as a result of a relative movement. The structure of the steels has a great influence on abrasion resistance, so that certain thermo-chemical treatments applied to steels, besides the structural changes, are also aimed at changes in the chemical composition in the superficial layers as a result of diffusion with certain elements. A highly used thermo-chemical treatment is the aluminization, especially as a process for increasing the wear resistance, of the hot oxidation resistance, in order to replace the expensive refractory alloys with heating resistance up to 800-1000 °C with cheaper materials.
Complex Micro Machining of an Injection Mold Surface for a Conductive Polymeric Composite Product
Authors: Serban Daniiel , Opran Constantin Gheorghe
Published: August 2019

Hydrogen and fuel cell technologies were identified amongst new renewable energy technologies which contribute strongly to mitigating climate change. Important research activities were directed to the injection molded bipolar plates made by conductive polymeric composites. The mold surface quality can help obtaining better conductivity. In this paper are presented the experiments regarding complex micro-machining of the surfaces of an injection mold for a conductive polymeric composite product by micro-milling and for finishing and cleaning by laser beam micro-machining. The laser ablation consists in removing material from a solid surface by irradiating it with a laser beam, in successive layers in order to achieve complex geometries with accuracy of about micrometres. Injection moulding experiments evidenced the very good replication of the micro-machined surface pattern.
A grafo-numeric method of determination of the operation power of the rotor of EsRc-1400 bucket wheel excavator using computer simulation in SolidWorks
Authors: Popescu Florin Dumitru , Radu Sorin Mihai , Andraş Andrei , Kertész Brînaş Ildiko
Published: August 2019

The bucket wheel excavator (BWE) is a complex continuous digging machine, used to excavate material using a layout of buckets installed on a rotor (bucket wheel), and at the same time, using the conveyor system installed on its boom, transferring this material to the main conveyor. The bucket wheel is the operating equipment, and it rotates in the vertical plane and performs (with the boom) a pivoting movement in the horizontal plane and an ascendant – descendent movement in the vertical plane. The paper presents a new grafo-numeric method of determination of the operation power of the BWE rotor, using computer simulation in SolidWorks. The aim of using virtual models for the analysis of the operation of some components of the BWE is to reduce the specific energy consumption during cutting while maintaining the installed operation power of the rotor, to increase the excavation capacity and to improve the cutting – loading system.
Study on the opening of a new working place in Romania of an European expedition house
Authors: Popescu Liliana Georgeta , Frãþilã Mihaela Elena
Published: August 2019

The present paper aims to carry out the case study on the possibility of opening a new working point of Englmayer Spedition GMBH in Dolj County. Starting from the current situation of Sibiu’s work point and based on the results of the measurements, the necessity of opening a new working point is demonstrated. Englmayer is a transport and delivery company headquartered in Austria, with many work points in Europe including 5 terminals in Romania. The case study includes the presentation of the current situation on the Sibiu work point, followed by the calculations required to highlight the need to open a new work point in Dolj county. This new working point will take over part of the daily work from Sibiu’s workstation. An analysis of the risk of opening the new workspace and the improvements was made in order to minimize the risks. It was used the FMEA procedure. Business improvement proposals includes the solutions found to make the workplace useful and to bring profit to the community.
The Origin–Destination Matrix Development
Authors: Dragu Vasile , Roman Eugenia Alina
Published: August 2019

Transport studies are conducted for a better understanding of the actual mobility and for developing transport forecasting models to predict the future transport demand and the changes in travel patterns. Transport planning involves the decision-making process for potential improvements to a community’ s roadway infrastructure. The first transport models used to analyze globally the transport system requirements while nowadays models were rethought as a demand – supply interaction reflecting the correlation between transport and socio-economic development. The transport forecasting methodology use a four stage structure consisting of: trip generation, trip distribution, modal split, traffic assignment. In the second stage of the model, the generated trips for each zone are distributed to all other zones based on the choice of destination. The trip pattern is represented by means of an origin-destination (O-D) matrix. The Growth Factor Model and the Gravity Model are two methods to distribute trips among destinations. The two methods for developing the O-D Matrix are presented and criticized in this paper, showing the similarities and differences between them and highlighting the implications for rigorous determination of future transport demand. A case study is done to emphasize the differences between these models and their implications in carrying out transport studies.
The planning of business processes in an uncertain environment on oligopolistic markets
Authors: Aleksakhin Alexander , Zaytsev Ivan , Eliseeva Evgeniya , Petergova Angelina , Kostygova Luydmila
Published: August 2019

In today markets conditions, the company independently determines their goals and tasks, and chooses the most effective management methods depending on current economic situation. For achieving a stable position in the market, the company needs to improve approaches related to strategic management, in particular, to develop a competitive strategy for providing resources using special economic mechanisms. One of the areas for improving the strategy can be the application of a scientifically based management system to ensure the process of rational procurement of raw materials, which will enable detailed planning of the business processes of the enterprise. Managing the process of rational procurement of raw materials of the necessary components is expedient to implement, using elements of game theory. The models described in this paper allow us to formalize the behavior of companies on the oligopolistic market. It helps to develop recommendations for making strategic decisions for providing raw materials with the necessary components in conditions of uncertainty.
Organizational Culture Vector Important for the Performance of a Company
Authors: Popa Elena-Izabela , Furdui Amalia , Edelhauser Eduard-Victor
Published: August 2019

Organizational culture has become a fashionable subject in recent years, a topic that has been approached frequently in both academic and economic environments. Its importance is mainly reflected by the impact it has on the results of an organization. Thus, whether a public institution, a state-owned or a foundation society, we can definitely appreciate that a healthy organizational culture is a safe chance for success, it is one of the main factors that can determine the performance of that organization. In this context, the paper addresses a topic that has been little explored in the Romanian literature: to establish a possible link between the organizational culture and the performance of an organization. In order to achieve a first pragmatic approach to the research topic, we have conducted a case study on the assessment of organizational culture within a power generation company. This study evaluated the organizational culture in the company and analyzed whether the organizational culture influences its performance. The case study is not representative of Romania, but it is only a trend reflected by a company that produces electricity and which has posed the issue of assessing the organizational culture and its impact on its long-term performance. The research was conducted on a representative sample for management and executives. Through the research, the organizational culture was evaluated, its specificity was highlighted, and the organizational culture within the company was observed. It has been analyzed whether the organizational culture is understood by the employees and whether they fully adhere to it, but also the link between this concept and the company’s performance. The management segment that refers to organizational culture is of great importance in the structure of a company as it can influence its results. Culture could be used to improve employees’ actions within a company if it is managed correctly, creating a competitive advantage, thus differentiating companies from one another. Taking these issues into account, understanding and using the concept of organizational culture as a tool within a company has become impetuously necessary if a company targets a top position in the ranking of the domain in which it operates. It is obvious that understanding of culture is crucial to managerial and organizational action, not just a causal relationship between organizational culture and performance.
Hardware structure of a surveillance system for strategic objectives
Authors: Constantin Victor , Avram Mihai , Bucsan Constantin , Vlasceanu Alexandru
Published: August 2019

The paper presents the hardware structure of a system for the surveillance of strategic objectives. The proposed system consists of several mobile robots patrolling along a perimeter, identifying potential intruders. The information obtained is transmitted to both the mobile robots and a fixed control system, which may decide to get more detailed information about the event, sending a quadcopter in the area with a high-resolution infrared camera, and a radar sensor. It communicates to the control system all the information obtained, and these will lead to a decision.
The effects of filling characteristics on the longitudinal forces developed in the braking train
Authors: Crăciun Camil Ion , Cruceanu Cătălin
Published: August 2019

Determination of longitudinal dynamic forces, size assessment as well as their distribution in the train body is, and will be a subject of global research. As observed from the beginning of the evolution of the railway vehicle and the train itself, the main reason for the occurrence of longitudinal dynamic forces is represented by the differences in inertial forces between the consecutive train vehicles. These inertial forces are influenced by the braking forces developed on each vehicle. The brake with which a railway vehicle is equipped is the pneumatic brake with compressed air. It evacuates the air from the train’s general pipeline, increasing the pressure in the brake cylinders of each vehicle. The brake command and cylinder filling is more delayed on long trains compared to short ones. Thus, the brake can operate in two ways, the fast-action brake and the slow-action brake. In this paper, we aim to highlight the influence of the brake type by the brake cylinder filling characteristic of the dynamic longitudinal reactions. It will be analysed on a simplified train model the magnitude and distribution of longitudinal dynamic forces obtained using both braking systems.
The analysis of the robotized handling of oxygen gas bottles with the help of the Petri networks
Authors: Culda Lavinia , Muncuț Elena Stela , Mihai Erdodi Geza
Published: August 2019

The gas bottling industry is facing a number of problems. In this paper we accomplish a study on the robotic storage of oxygen gas tanks (bottles) applicable to other gases too. To do this, we developed a prototype using the Lego Mindstorms kits and we simulated the process to study the efficiency with the Petri Networks. We chose this kit, due to its complexity, being the closest to what we needed to make small scale storage. The program the robot uses for working was done in a special programming language: Mindstorms SDK and downloaded to the controller’s memory.
Influence of the theoretical load point on the value of the J - JQ integral during determination of fracture toughness of 2519 aluminium alloy
Authors: Kotyk Maciej , Boroñski Dariusz
Published: August 2019

The J integral is a value describing the fracture toughness of non-linear-elastic materials. One of such materials is the aluminum alloy AA2519. Due to the fact that it became the base material for the composite AA2519 - AA1050 - Ti6Al4V, it was decided to re-test this material. Due to the use of the aforementioned Al - Ti composite alloy AA2519 was also tested under cryogenic conditions. During the tests, its fracture toughness was determined using the J integral. Both in the method of one sample and many samples it is necessary to include the geometry of the sample. Currently, standard methods withdrawn, and did not describe all the required aspects of the research. During the time when the described material was created, the displacement point was not taken into account during the fracture toughness tests. Accordingly, there is a need to re-verify the determined once the fracture toughness of the described material. This article presents the author’s method of determining load displacement lines in compact samples (CT). It should be noted that this sample had an uncommonly encountered geometry. In the described case the width of the sample was four times the thickness.
The welding program optimization of a S355 steel assembly used in agricultural machinery
Authors: Muncut Elena-Stela , Culda Lavinia-Ioana , Erdodi Geza-Mihai , Sima Gheorghe
Published: August 2019

The paper will include the realization of a weld joint line with an ABB robot. The manufacturing area contains a welding device and a robot. For the robotic welding, the methods and a complete welding program will be presented. The first stage is the design of the device that can be used for manufacturing a range of comparable size pieces with similar gripping capability. There are described the axes and the way of movement, the presentation of the speeds for the rotating joints and roto-translation. CAD design of the workpiece including WPS (welding technology that contains the shape of each joint and welding parameters: welding current, electric arc voltage, welding speed and secondary parameters). The base material, the addition material, protective gases and a list of parts from the robot that require periodic changes will be presented. It is presented the CAD design of the workpiece including WPS.
The Internet – A Successful Technology for the Footwear Factories from the Republic of Moldova
Authors: Spînachii Elena , Matran Cristian , Malcoci Marina , Pîrvan Evgheni
Published: August 2019

Today, the importance of the Internet in any field of activity, whether economic or less economic, is no longer under discussion. The Internet is the one that can be used by anyone to achieve their desired goals. The access to information and the development of new technologies have now reached an unprecedented level in history, hence the ability of economic agents to reach out to prospective buyers much more than ever before, but unfortunately, the internet is often not used to its true value. Thus, on the national market, out of the 17 (100%) footwear factories analyzed none owns online trade, 12 (71%) own the web page and 5 (29%) – do not. The success of businesses across the country in the future depends to a large extent on their ability to integrate into the wave of digital change. The Internet in Moldova is developing, being an opportunity for domestic companies to produce quality footwear and affordable products.
Identification and analysis of geotechnical risks in the conditions of flooding of the remaining gaps
Authors: Apostu Izabela Maria , Faur Florin
Published: August 2019

Controlled flooding of the remaining gaps of former quarries (especially lignite quarries) and the formation of lakes that can take different uses is one of the ways of recovering and rehabilitating degraded mining lands which offer opportunities for sustainable development of a mining region. The advantages of such a solution are multiple, starting from the restoration of biodiversity, to economic and social benefits. Basically, several flooding techniques are known, but depending on the geological, geotechnical, hydrological and hydrogeological conditions characteristic for a particular region, these techniques must be adapted to the risks that may arise before, during and after flooding the remaining gap. Most of the times, the risks are of geotechnical nature and arise as a result of the interaction between the rocks and the mixture of loose rocks that form the final slopes and the dump with water. The paper is part of an extensive research, which is carried out under the concrete conditions of the remaining gaps in the Rovinari mining basin, and essentially aims at: identifying the main categories of geotechnical risks that can occur under the given conditions, determining the triggering factors, to produce negative geotechnical phenomena and their effects, as well as to identify the main measures to avoid them.
Rehabilitation opportunities of geomorphological modified lands in Panga Open Pit – Coal Basin Berbeşti
Authors: Chiriţă Ramona-Victoria , Lazăr Maria
Published: August 2019

Recovery and reuse of the lands affected by mining activities in the Panga open pit is carried out on a complex project that takes into account pedological, agrochemical and spatial aspects that highlight the physico-chemical properties of the land and, implicitly, the productive and recreational potential. The importance of eliminating or mitigating of the anthropic impact and of land reuse also arises from the fact that once restoration works are completed, the influence of the mining activity on the environmental factors will be considerably reduced and the vegetation, fauna and zonal microclimate will be restored. One of the major consequences of mining activity refers to significant geomorphological changes. In the present paper, these geomorphological changes generated by the mining activities are analysed in order to identify the land reuse opportunities, to ensure the premises of sustainable development of the region.
Aspects regarding a mining area rehabilitation for post-industrial tourism
Authors: Toderas Mihaela , Samuil Ionela , Ionica Andreea , Olar Marius , Militaru Stefan
Published: August 2019

The main problem of former industrial areas with history of mining exploitation is the impact of specific activities both on the environment as well as on the social and economic life of the population. In this context, we talk about the Jiu Valley, a mono-industrial area where significant environmental degradation is observed and which did not benefit from economic diversity policies. The aim of this paper is to identify possibilities for the rehabilitation of the Petrila mining perimeter and its potential use in a touristic circuit that adds value to constructions declared historical monuments, dating back to 1850, such as the central shaft and the skip, the old compressors, treatment and the mechanical workshop.
Criminal liability in case of infringement of the rules on occupational safety and health and the occurrence of accidents at work – subjects of the offenses
Authors: Popescu Ioan , Romandas Nicolae , Lohan Nicoleta-Monica , Albulescu Andrei George , Mihalache Elena , Baciu Constantin
Published: August 2019

This paper presents some specific aspects regarding criminal liability in case of infringement of the rules on occupational safety and health (OSH) and the occurrence of work accidents, referring to the object and subject of the offense according to the provisions of articles 349 and 350 of Law no. 286/2009 and of Law no. 319/2006. There are determined the active and the passive subjects involved in the occurrence of events, as well as their duties and obligations in terms of safety and health at work. Personal considerations were formulated regarding the classification of the employed staff in the category of active subjects, but also regarding the need for urgent clarification of the situation of the day workers who perform activities under Law no. 52/2011 and who can be involved in work accidents with different degrees of seriousness produced within the company.
The description and evaluation of technical incident risk on the National Power Grid in the context of power safety growth
Authors: Fîță Daniel N. , Barb Crina , Păsculescu Dragoș , Pană Leon
Published: August 2019

In the context of increasing the importance of power safety for national security, the security of power systems within the National Power Grid, must be an objective of major and constant interest for the national transmission and system operator. Evolutions in recent decades have shown the increase in vulnerabilities caused by: failure, destruction and/or disruption of technological infrastructures caused by acts of terrorism, natural disaster, negligence in service, work accidents of technical nature, technical incidents, criminal activities and lack of investment. For the critical analysis of the National Power Grid, 4 (four) possible risk scenarios with effects of instability of the power safety and with major effects on the national security were identified, described and evaluated: Risk Scenario 1 - Technical Incident, Risk Scenario 2 - Damage: Technical Incident Sequence, Risk Scenario 3 - Damage: Natural Disaster, Risk Scenario 4 - Damage: Terrorist Attack. The purpose of the paper is to describe and evaluate the Risc Scenario 1- Technical Incident (which is most prevalent) on the power substations and to prevent potential disturbances in the safety of the power supply to consumer.
Health and Safety Management in the Aspects of Singularity and Human Factor
Authors: Grabara Janusz K.
Published: August 2019

Entering the era of sustainable development and artificial intelligence slowly but surely changes the way we understand the world around us. This state of affairs is met with a lack of acceptance, most often resulting from a lack of knowledge in the area of the latest organizational and technical solutions. In connection with these activities, a new concept of “technological personality” appeared, which is also known as “singularity”, meaning a moment in future development (some say that this moment has already occurred) when technical progress becomes so rapid that it is unpredictable. This may happen at the time of the creation of artificial intelligence that surpasses the intellectual capabilities of man. Such a change also entails changes in the form of interdisciplinary science and creates completely new points of reference. Due to the fact that new organizational and management trends appear in the processes of risk and work safety assessment resulting from the implementation of tasks related to occupational safety and health management, including sustainable development and new areas of supporting these tasks by modern information technologies, research activities should be undertaken in the scope of identifying and identifying these trends and ranges.