bluuebunny/crossref_metadata_2025 huggingface dataset:
A Preliminary Investigation for Standardization of Hydroalcoholic Extract of Mucuna pruriens (Kapikaccu): An Important Drug Used to Treat Parkinson’s Disease in Ayurveda
Authors: Swamy Gangadhara , Holla Rajendra , Rao Suresh R.
Published: February 2020

Establishment of standardization for the Ayurvedic formulations is most important for its chemical compounds, biological action, and its quality reassurance in production and manufacturing of traditional herbal medicines. As most of the drugs are standardized, drug companies are using substitute drugs instead of true drugs. So, to make finest superiority drugs it is necessary to validate raw drugs. Observing the existing trend in mind, hydroalcoholic extract of Mucuna pruriens seeds (HAMP) was subjected to standardize the procedures for phytochemical tests. The separation of bioactive substances from HAMP was performed using both manual methods and high-profile thin layer chromatography. From the current study, it is revealed that the seed contains alkaloids, steroids, carbohydrates, tannins, flavonoids, and coumarins, which gave the medicine numerous therapeutic properties.
Neurosurgery in a Case of Suspected Prion Disease: Challenges Faced
Authors: Abdul Salam Anooja , Dubey Arvind
Published: February 2020

This report refers to a rare case of a patient with suspected prion disease and the steps taken for the infection control measures in postsurgical management of a large sphenoid wing meningioma. Stringent measures are needed to prevent the transmission of Creutzfeldt–Jakob disease (CJD) to other patients or healthcare workers. The main concern, especially in a neurosurgical case, is the handling of highly infective tissue and hence the higher risk of disease transmission. This report provides guidance based on the experience in this case, as an aid to similar surgeries.
Technique, cell assembly, and measurement ofT-dependent electrical resistivity of liquid Fe devoid of contamination at P, T conditions
Authors: Ezenwa Innocent C. , Yoshino Takashi
Published: February 2020

Since the cores of rocky planetary bodies are mainly Fe in composition, the understanding of the electrical resistivity and thermal conductivity of solid and molten Fe at pressure and temperature conditions is vital in placing a constraint on the quantity of heat flux from the cores of these planets. We develop an experimental technique and cell design to measure the temperature-dependent electrical resistivity of solid and molten Fe and other transition metals under high pressure. This addresses the problem of metal sample contamination encountered in designs that used W/Re, W, and Mo in direct contact with the sample. At first, we attempted to improve these pre-existing designs by testing the suitability of Hf and Zr metals to serve as a mechanical barrier between the electrodes and the sample. Unfortunately, our result shows that solid Hf and Zr dissolve in molten Fe and are not suitable for this purpose. Next, we adopt the same sample material, Fe, for electrodes and leads while the thermocouple leads are taken through the gasket and protected against frequent mechanical breakage using the shielding technique. The recovered Fe samples compressed at various pressure conditions and heated up to 200 K above the melting temperature show no trace of contamination. As anticipated, the resistivity increases and decreases with increasing temperature and pressure, respectively. Thus, to closely measure the electrical resistivity of molten Fe and other similar metals at extreme conditions, it is necessary to ensure liquid containment, eliminate biased voltage through the current reversal technique, and ensure the use of the same material for the electrode and sample while monitoring the sample temperature using a thermocouple placed close to but not in contact with the sample. Our developed technique provides the highly demanding technique for investigating the temperature-dependent electrical resistivity of Fe and other similar metals devoid of contamination at extreme conditions. This progress will accelerate studies which will provide a detailed understanding of the electrical and heat transport properties of Fe as it applies to the core of rocky planetary bodies.
Measurement of the energy distribution of electrons escaping confinement from an electron cyclotron resonance ion source
Authors: Isherwood Bryan , Machicoane Guillaume
Published: February 2020

Production of high charge state ions in electron cyclotron resonance ion sources (ECRISs) is dependent on the electron energy distribution (EED) within the source plasma. In order to better understand the EED, a measurement of electrons escaping axially from an ECRIS device has been performed at the National Superconducting Cyclotron Laboratory. Electrons were measured escaping from the Superconducting Source for Ions, driven at 18 GHz. Dependencies of the observed EED on the confining magnetic field strength and injected microwave power are reported. This paper focuses on large peaks of electrons in the 400–1200 keV energy range. Measurements of the axial bremsstrahlung spectrum have been simultaneously carried out to provide a direct comparison between both techniques. A comparison between the energy associated with the peak of the electron distribution and the spectral temperature of the bremsstrahlung distribution is shown.
Triode magnetron injection gun for the KIT 2 MW 170 GHz coaxial cavity gyrotron
Authors: Pagonakis Ioannis Gr. , Avramidis Konstantinos A. , Gantenbein Gerd , Illy Stefan , Ioannidis Zisis C. , Jin Jianbo , Kalaria Parth , Piosczyk Bernhard , Ruess Sebastian , Ruess Tobias , Rzesnicki Tomasz , Thumm Manfred , Jelonnek John
Published: February 2020

Considering the recent understanding of the physics of electron trapping mechanisms taking place in the magnetron injection gun (MIG) region of gyrotrons and the sensitivity of the emitter ring manufacturing tolerances on the electron beam quality, a MIG has been designed and manufactured for the 2 MW, 170 GHz coaxial cavity gyrotron developed at Karlsruhe Institute of Technology. The new MIG has the following novelties: (i) the design satisfies the criteria for the suppression of the electron trapping mechanisms, (ii) a new type of emitter ring is used for the suppression of the influence of the manufacturing tolerances and misalignments on the quality of the generated electron beam, and (iii) the design was optimized to generate a good beam quality in a wide variety of magnetic field profiles to increase the flexibility. An additional important feature of the new triode MIG design is the possibility to operate with only two power supplies by using a special start-up scenario. The first experimental results of the coaxial cavity gyrotron with the new MIG are presented.
Lateral p-GaN/2DEG junction diodes by selective-area p-GaN trench-filling-regrowth in AlGaN/GaN
Authors: Xiao Ming , Du Zhonghao , Xie Jinqiao , Beam Edward , Yan Xiaodong , Cheng Kai , Wang Han , Cao Yu , Zhang Yuhao
Published: February 2020

This work demonstrates a lateral p-n junction diode formed between the two-dimensional electron gas (2DEG) and the selective-area regrown p-GaN in AlGaN/GaN. Benefiting from the in-plane 2DEG channel, this p-GaN/2DEG diode can directly characterize the current conduction and voltage blocking characteristics of the regrown sidewall p-n junction, which has been regarded as the key building block of future high-voltage GaN power devices. Control samples with planar regrown p-n junctions are first used to optimize the regrowth conditions. The planar junction characteristics show considerable improvement by adding the Mg pre-flow (Cp2Mg) before the p-GaN regrowth, which is attributed to the Mg out-diffusion beyond the regrowth interface. A record high ratio between the Mg concentration and the maximum impurity (C, Si, O) spike at the regrowth interface is demonstrated. Using the optimal regrowth conditions, the fabricated p-GaN/2DEG junction diodes show excellent rectifying behavior with an on/off ratio of over 5 × 107 in both large-area devices and the multi-finger devices with 1 μm-wide finger trenches. A breakdown voltage over 100 V is demonstrated, where the peak electric field is estimated to be at least 2.5 MV/cm at the sidewall junction. These results not only suggest that p-GaN trench-filling regrowth is a viable approach for selective-area p-type doping in GaN power devices but also open a door for the development of unconventional GaN devices based on p-GaN/2DEG junctions.
Helical-chiroptical nanowires generated orbital angular momentum for the detection of circularly polarized light
Authors: Wang Zhongxuan , Gao Mingsheng , Hao Xiaotao , Qin Wei
Published: February 2020

In this work, we designed a type of organic chiral polymeric nanowire with strong orbital angular momentum to fabricate circularly polarized light detectors. In chiral polymeric nanowires, chirality induced orbital angular momentum could lead to the splitting of spin up and spin down energy levels, which determines the performance of circularly polarized light detection. In addition, chiral polymeric nanowire based circularly polarized light detectors exhibit excellent reversibility and stability after several hundred switching operations, which provides a solid footstone for potential applications.
Simple and efficient algorithm for the roundness error from polar coordinate measurement data
Authors: Li Xiuming , Zhu Hanbing , Guo Zhen , Liu Yuwei
Published: February 2020

Evaluation conditions of the minimum circumscribed circle and maximum inscribed circle in Cartesian coordinates are transformed into those in polar coordinates. According to the radius of the measured points, the candidate points for evaluating the minimum circumscribed circle and maximum inscribed circle are divided into three cases which are solved with the corresponding algorithms. Several examples have been used to validate the validity of the proposed algorithm.
Dynamics of a microswimmer–microplatelet composite
Authors: Daddi-Moussa-Ider Abdallah , Lisicki Maciej , Löwen Hartmut , Menzel Andreas M.
Published: February 2020

Guiding active microswimmers by external fields to requested target locations is a promising strategy to realize complex transport on the microscale. For this purpose, one possibility consists of attaching the microswimmers to orientable passive components. Accordingly, we analyze theoretically, using a minimal model, the dynamics of a microswimmer when rigidly attached to a (significantly larger) microplatelet, here represented by a thin circular disk. In this way, we first determine the flow field in the whole space induced by a Stokeslet that is located above the center of a spatially fixed rigid disk of no-slip surface conditions. Finally, we determine and analyze possible trajectories of the overall composite. To this end, the platelet is additionally endowed with a permanent magnetic moment, which allows us to steer the motion of the whole composite by a homogeneous external magnetic field. As previous experimental studies suggest, related setups may be helpful to guide sperm cells to requested targets or for the purpose of coordinated drug delivery.
Measuring heat loss and temperature changes in molten salt storage tanks
Authors: Larter Raima
Published: February 2020

Few experimental measurements of heat loss from molten salt tanks are available. A recent study helps to fill the gap with new data.
Dietary partitioning in newly sympatric urban flying-foxes (Pteropus poliocephalus and Pteropus alecto)
Authors: Griffith Phoebe , Parry-Jones Kerryn , Cunningham Andrew A.
Published: February 2020

The black flying-fox (Pteropus alecto) is extending its range southward and is now sympatric with the grey-headed flying-fox (P. poliocephalus) in New South Wales. Competition for food between the two species has been suggested to be a contributor to declines of the vulnerable grey-headed flying-fox. During winter 2016 the diet of both species was investigated over one night at four sites of sympatry, by microscopic analysis of faecal samples. Resource partitioning between the two species was found, with the black flying-fox either preferentially choosing to eat more fruit than the grey-headed flying-fox or being an inferior competitor for pollen and nectar. These results, though limited, do not support the hypothesis that the black flying-fox threatens the grey-headed flying-fox through food competition.
Is leaf age a predictor for cold tolerance in winter oilseed rape plants?
Authors: Doǧru Ali , Çakırlar Hüsnü
Published: February 2020

In the present study, low temperature-dependent physiological changes were investigated through photosynthetic activity and some endogenous mechanisms in two winter oilseed rape cultivars (Brassica napus L. ssp. oleifera cvv. Eurol and Hansen) on the basis of leaf age. Chlorophyll fluorescence measurements demonstrated that low temperature caused decreased photosynthetic activity in both cultivars. However, photosynthetic apparatus in the young leaves of Hansen is more tolerant to low temperature as demonstrated by lower F0 (minimum fluorescence yield) and 1–qp (excitation pressure of photosystem II), higher Fm (maximum fluorescence yield), Fv/Fm and non-photochemical quenching (NPQ) compared with Eurol. In addition, young leaves of Hansen represented marked increase in some antioxidant enzyme activities (superoxide dismutase (SOD), ascorbate peroxidase (APX) and glutathione reductase (GR)) during cold exposure. In the young leaves of Eurol, however, APX and GR activity was decreased by low temperature, indicating lower efficiency of ascorbate-glutathione cycle. Lower antioxidant activity in the young leaves of Eurol may be responsible for increased malondialdehyde (MDA), H2O2 and membrane damage and decreased chlorophyll content as a result of oxidative damage during cold exposure. In the cold-stressed mature leaves, both cultivars represented similar antioxidant capacities and photosynthetic efficiency. As a consequence, coordinated increase in SOD, APX and GR activities, increased capacity to keep quinone A (QA) in an oxidised state (as indicated by lower 1–qp) and accumulation of soluble sugar and proline could be mainly attributed to higher level of tolerance of the young leaves of Hansen to low temperature when compared with Eurol.
A new subtribal classification of Myrtaceae tribe Chamelaucieae
Authors: Rye Barbara L. , Wilson Peter G. , Heslewood Margaret M. , Perkins Andrew J. , Thiele Kevin R.
Published: February 2020

A new classification of Myrtaceae tribe Chamelaucieae DC., derived from a molecular phylogenetic analysis based on nr ETS and cp trnK and atpB–rbcL spacer sequences, is presented. Eleven subtribes are recognised, eight of which are new. The currently accepted circumscriptions of subtribes Calytricinae Benth. and ‘Euchamelaucieae Benth.’ (nom. inval.) are retained, with the latter being formally published here as Chamelauciinae Rye & Peter G.Wilson. Subtribe Thryptomeninae Benth. is reduced in size by the creation of the new subtribes Alutinae Rye & Peter G.Wilson and Micromyrtinae Rye & Peter G.Wilson. Subtribe Baeckeinae Schauer is reduced to a single genus, with the excluded genera distributed in the new subtribes Astarteinae Rye & Peter G.Wilson, Hysterobaeckeinae Rye & Peter G.Wilson, Ochrospermatinae Rye & Peter G.Wilson, Rinziinae Rye & Peter G.Wilson and Stenostegiinae Rye & Peter G.Wilson. The history of recognition of the genera and subtribes of Chamelaucieae is outlined and supporting morphological evidence for the new classification discussed.
Recycling through perspective persistence in Monsang (Trans-Himalayan)
Authors: Konnerth Linda
Published: February 2020

In a reported intentionality construction, intentionality is expressed as reported speech/thought (‘s/he
says/thinks, ’). The quoted clause must contain a first person form and refer to the future. Reported
intentionality displays perspective persistence and an accompanying apparent form-meaning mismatch, as it structurally marks the
speech-act participant perspective of the volitional agent despite idiomatically translating only from the perspective of the
current speaker. While this construction has been examined in languages around the world, this is the first treatment for the
Trans-Himalayan (or Sino-Tibetan/Tibeto-Burman) language family. Monsang (South-Central; Northeast India) is shown to have a
reported intentionality construction of the cross-linguistic type. In addition, there is a desiderative construction in the
language that does not display perspective persistence but is argued to reconstruct back to a reported intentionality
construction. Further evidence from synchronic and diachronic quotative constructions in Monsang is presented that illustrates the
prominence of quotative-derived expressions of intentionality in Monsang verbal morphology.
Non-propositional meanings and commitment attribution
Authors: Müller Misha-Laura
Published: February 2020

In this paper, I elaborate on the cognitive pragmatic approaches of commitment attribution. I argue that
non-propositional meanings (Sperber and Wilson 2015) play a role in the reconstruction
of arguments (see Oswald 2016) and I underline that this constitutes a further argument
in favor of a cognitive approach to the study of commitment attribution. I focus on an authentic example of a straw man fallacy
consisting in (a) an implicit misattribution of commitments to the speaker with the form “Excuse me for having done p” and (b) a
refutation of the attributed position by means of non-propositional effects (in this case, the refutation is implicitly conveyed
through an ironical utterance). I conclude that non-propositional effects can serve as a criterion to distinguish a mere false
attribution of commitments from a full-fledged straw man fallacy.
African languages and Spanish among Equatoguineans in Madrid
Authors: Schlumpf Sandra
Published: February 2020

Equatoguinean immigrants in Madrid constitute an often-overlooked group in Spanish society and in the
Spanish-speaking world in general, despite the facts that Equatorial Guinea was a Spanish colony until 1968 and the Equatoguinean
community in Spain is the largest outside Guinea. This paper analyzes the use of African languages and Spanish among
Equatoguineans in Madrid: Do they maintain their African languages in Spain? When do they use them, and what is their
significance? What connection do the interviewees observe between the use of African languages and the proficiency of Spanish
spoken by different Equatoguinean ethnic groups? The results are based on ten semi-directed, sociolinguistic interviews, which
occurred in Madrid in 2017 with Equatoguineans of two ethnic groups: Bubi and Fang. They show the importance of relating data to
the contemporary as well as historical sociopolitical and cultural circumstances of Equatorial Guinea.
Teaching interpreting online for the Translation and Interpreting Degree at the University of Vic
Authors: Perramon María , Ugarte Xus
Published: February 2020

At a time when the advances in information and communication technologies meant that new approaches to virtual teaching and learning could be proposed, the teaching staff on the degree in Translation and Interpreting at UVic decided to offer part of the degree in distance learning mode. This learning mode was launched in the 2001–2002 academic year, with optional face-to-face teaching sessions some Saturdays and coexisted with the traditional face-to-face courses.

During the first years, the fourth-year interpreting specialisation subjects were not taught online for technical and pedagogical reasons. Since the 2014-2015 academic year, we also teach these subjects online.

The challenge that we face starting the 2017-2018 academic year is twofold:

1. To adapt the online teaching of interpreting subjects to groups with a high number of students in the new Inter-university Degree in Translation, Interpreting and Applied Languages jointly offered by the University of Vic and the Open University of Catalonia (UOC).

2. To adapt the contents and methodology of interpreting subjects to changes in professional practice: telephone and videoconference interpreting, especially in liaison interpreting.

In our paper, we will show some online teaching resources, as well as several online tools which we use in our courses.
When non-coding is not enough
Authors: Anfossi Simone , Calin George A.
Published: February 2020

A new concept is emerging in the non-coding RNA (ncRNA) field: an increasing number of ncRNAs in fact codify for short peptides that have biological activities. In this issue of JEM, Wang et al. (https://doi.org/10.1084/jem.20190950) report the identification of a long ncRNA (lncRNA)–encoded 60–amino acid polypeptide that they name ASRPS, as well as its ability to inhibit angiogenesis in the deadly triple-negative breast cancer (TNBC).
Photon correlation transients in a weakly blockaded Rydberg ensemble
Authors: Möhl Charles , Spong Nicholas L R , Jiao Yuechun , So Chloe , Ilieva Teodora , Weidemüller Matthias , Adams Charles S
Published: February 2020

The nonlinear and non-local effects in atomic Rydberg media under electromagnetically induced transparency (EIT) make it a versatile platform for fundamental studies and applications in quantum information. In this paper, we study the dynamics of a Rydberg-EIT system in an ensemble that allows for more than one Rydberg excitation in the propagation direction. The density of two-level atoms is such that transient superradiant effects occur. We experimentally observe a cross-over between coherent collective emission (‘flash’) of two-level atoms to a Rydberg dressed regime (‘dressed flash’) under EIT condition. The complex dynamics are characterised using both intensity and time correlation measurements. We show that while steady-state EIT gives a second order correlation g
(2) = 0.79 ± 0.04, the Rydberg-dressed flash exhibits anti-bunching down to 0.2 ± 0.04.
A Correction of Lorentz Transformation
Authors: Zhang Yao , Yang Haitao , Li Xiaopan , Wu Wenliang
Published: February 2020

As a correction of the Lorentz transformation, the Magic transformation eliminates a hidden logical danger of the Lorentz transformation. With the second order square matrix, a new derivation of the Magic transformation is given. The Magic transformation may be a reasonable modification of the Lorentz transformation in theory, and it is hoped that it will arouse the attention of physicists.
Comprehensively modeling and parametric identification for speed prediction of L1B2 ultrasonic motor
Authors: Deng Yang , Zhao Gang , Yi Xingyu , Xiao Wenlei
Published: February 2020

Ultrasonic motor is a kind of newly developed motor different from the traditional electromagnetic one, with its output is obtained by inverse piezoelectric effect and ultrasonic oscillation. As it is a complex coupling system, speed control of the motor is a quite difficult task. A comprehensive parametric model for prediction of the steady-state speed of a linear ultrasonic motor is developed in this paper. The model is derived from synthesizing coupled subsystem models, and retains physical insight into some important nonlinearities. The driving circuit employing H-bridge inverter and LC resonance is described. The vibration equations of the stator are deduced by using Hamilton’s principle. An interface friction model involving asperity based stick behavior is introduced to characterize the stick-slip-separation dynamics at the interface. Further, an effective real-time and synchronous data acquisition and transmission experimental setup based on a L1B2 ultrasonic motor actuated motion platform is established to collect data for the parametric identification, and the results validate reliability of the model.
A Novel LLC Resonant Converter Circuit-Input Parallel Output Series Subside Resonant LLC Resonant Converter
Authors: Yu Ting , Chen Xikun , Wu Dongjing
Published: February 2020

At present, LLC resonant converters are mostly used in step-down situations. The reason why LLC resonant converters are not used in high step-up situations is that parasitic parameters caused by high turn-to-turn ratio of transformers affect the circuit and the large current stress of switching devices and resonant components on the input side. In this paper, a new type of LLC resonant converter circuit, i.e. input parallel output series subside resonant LLC resonant converter, is designed. It can not only reduce the current stress borne by the switching devices on the input side and the resonant components, but also reduce the turn-to-turn ratio of the transformer under the same output voltage. Therefore, it can be used in boost occasion to output high voltage. In this paper, a new type of circuit is used in high boost situation, and the final output is stable 2KV high voltage.
Study on Method of Extracting Circle of Complex Objects Based on 3D Scanning
Authors: Zhang Yansong , Li Mingheng , Liang Xiaoyu
Published: February 2020

This paper proposes a method for extracting information about circular holes for complex objects with cylindrical apertures which base on special 3D scanning platform. After scanning the object, the point cloud is sliced after fitting the plane using the eigenvalue method. Aiming at the slice data, a point cloud segmentation extraction algorithm is proposed. The experimental results show that the system can effectively control the aperture extraction error and broaden the types of detectable parameters.
New Eighteen-sector Direct Torque Control Based on Duty Ratio Modulation
Authors: Wu Zhonghao , Zhou Jiemin , Zheng Gang , Li Tao , Zhu Zihan
Published: February 2020

In the traditional direct torque control (DTC) of permanent magnet synchronous motor (PMSM) system, the ripple of stator flux linkage amplitude and electromagnetic torque at the steady state is large. The unbalanced effect of active voltage vectors on stator flux linkage and torque control is analysed. Based on the idea of sector subdivision, combined with the six new active voltage vectors added by the three-level inverter, a new eighteen-sector DTC method is proposed to improve the control effect of voltage vectors. For the overcompensation problem caused by the voltage vector acting in a whole sampling period in DTC, the duty ratio modulation (DRM) method is used to reduce the torque ripple. Compared with the traditional DTC, the effectiveness of the proposed new control strategy for reducing the ripple of stator flux linkage and electromagnetic torque is verified.
Economic analysis of thermal power units operating under unconventional conditions
Authors: Ge Weichun , Liu Ziyang , Dong Fang , Wang Shunjiang , Chen Rong , Cui Di
Published: February 2020

In the case of deep peak shaving of thermal power units, it can absorb more photovoltaics and wind power, and also reduce the efficiency of thermal power plants and increase the environmental cost of society. This paper analyses the thermal power units under unconventional conditions from several influencing factors. The economics of operation, and innovative consideration of the current on-grid price and the latest government peaking subsidy factor. Firstly, according to the operating state and energy consumption characteristics of thermal power units, the peaking process is divided into conventional peaking, no oil depth adjustment and oil injection depth peaking, and the main factors affecting the deep peaking capacity of thermal power plants are analysed. The peaking energy cost model of thermal power units at different stages, and the actual power plant as the research object, the simulation results under different scheduling strategies are given. The results show that it is the most economical to increase the peaking depth of the unit to 54% of the rated capacity. The research results will provide a reference for better consumption of new energy.
Design of power tester for HPLC power line carrier communication module
Authors: Yu Minqi , Tang Yun , Huang Rui , Liu Mouhai , Yang Maotao
Published: February 2020

The current equipment used to test the power consumption of power line carrier communication modules not only has low dynamic power consumption, but also fails to meet the accuracy requirements for AC power tests. Based on a careful analysis of the key technologies of the dynamic power test of the communication module, this paper designs a power tester. This paper introduces the working principle of the power tester, discusses the corresponding circuit design scheme from two aspects of DC power consumption and AC power consumption, and analyzes the calculation methods of the two in detail. Finally, the test results of each test system are compared and analyzed. The power tester can achieve higher accuracy data testing.
Research on An Improved Cluster Average Clock Synchronization Method Based on ACATS Algorithm
Authors: Wang Shunjiang , Cao Lina , Lv Xuming , Cui Di , Gao Ming
Published: February 2020

At present, the real-time data of electric power measurement are not the same cross-section data, which have a large error and affect the analysis effect of various advanced application software. When the power grid fails, such analysis results may cause decision-making errors, thus threatening the safe and stable operation of the power grid. The ACATS algorithm is adopted in the invention, taking into consideration the phase offset, frequency drift and random delay in the process of information transmission. Inspired by the algorithm, the monitoring idea is used to improve the local average clock synchronization method of the nodes in the cluster in the algorithm, reducing the number of information exchanges required in the same step process of the nodes in the cluster, and taking into account the phase offset, frequency drift, and The random delay in the process of information transmission is of great significance to the practical network.
Optimization design and analysis of classroom light grid
Authors: Hao Bin , Cheng Min , Li Xiangfeng , Zhang Yini , Zhao Chenyu , Wang Chuanxi , Shan Bingrui , He Xiaoyang
Published: February 2020

Today’s classroom lamps are mostly aluminium-plated grille lamps with plastics, and most of the grids are regular rectangles or squares. According to the standard, the common grid is optimized. By increasing the shading angle of C0°-180° and reducing the shading angle of C90°-270°, it can reduce the glare and achieve the classroom light environment while achieving good light extraction efficiency. In this paper, through mathematical model analysis, I use SOLIDWORKS, tracepro, DIALux for modelling, ray tracing and classroom light environment simulation, it is verified that the grid designed in this paper has a great improvement in glare control compared with common grids.
Research on Safety Quality Credit Evaluation System of Power Construction Enterprises
Authors: Yang Bo , Li Hongbin , Xie Huan , Zhu Rong , Zhao Lei , Liu Anchang , Yu Tong , Fang Lie
Published: February 2020

In accordance with the guidelines for the construction of the national credit system and the demand for construction safety management in the power industry, this paper explores the establishment of a safety evaluation credit evaluation system for electric power construction enterprises by applying the credit evaluation index system and the evaluation criteria as the core, so as to lay the cornerstone to ensure quantitative output credit scores and qualitative output credit ratings. To that end, the paper further proposes the application scheme of safety quality credit evaluation system in terms of organizational security, application mechanism and management control measures, thereby contributing to the improvement of Safety quality management level for electric construction enterprises.
RETRACTED: How to Safely and Efficiently Perform Big Data Computer Information Processing
Authors: Hong Yunguo
Published: February 2020

In the era of big data, to ensure information security and avoid information leakage, it is necessary to fully handle computer information security. We should focus on improving computer hardware and software equipment, in order to improve network virus defense systems, and continuously improve data collection technology, communication technology, storage technology and security management technology. This article will systematically discuss how to safely and efficiently perform big data computer information processing and present personal insights.
A novel method of IoT wireless sensor nodes management based on OID technology
Authors: Chen Junhua , Shangguan Pengfei , Zhang Xia
Published: February 2020

With the continuous development of Internet of Things (IoT) technologies, massive wireless sensor nodes are deployed to construct several local wireless sensor networks over the world, which bring a great challenge to enormous wireless sensor nodes management. In this paper, a mechanism of sensor node managed object identifier (OID) is designed to merge classic SNMP MIB managed object identifier with sensor node identifier. Then, the framework of classic SNMP manager and agent is modified and optimised. Finally, a method for sensor nodes remote managing, which adapts to heterogeneous IoT network such as Internet linked with industry wireless network etc., is proposed to achieve hierarchical addressing and unified management of massive sensor nodes. The experimental result demonstrates that the proposed method satisfies the unified managing demand of a tremendous amount of sensor nodes in large-scale IoT network scenario by configuring and controlling sensor nodes.
Cluster Wind Power Uncertainty Model and Operation Simulation Method
Authors: Li Xuxia , Hu Yingying , Wang Yao , Deng Jiaojiao
Published: February 2020

The rational modelling of wind power uncertainty is the premise of relevant analysis and decision-making. The uncertainty, intermittent nature of cluster wind power and the spatial correlation between different wind farms are the key factors to determine the impact of cluster wind power on the power system. The rationality of the wind power uncertainty model will determine the validity of the wind power uncertainty analysis and decision-making model and the credibility of the analysis conclusions. The development of wind power in China is very rapid, but the accumulation of wind power and meteorological statistics is insufficient. The research on the uncertainty of cluster wind power output is not deep-going. For this reason, the wind power uncertainty model is taken as the entry point. This paper will establish the uncertain model of wind power and its simulation method. This method can generate time series of wind farm output in accordance with wind power uncertainty characteristics, and effectively analyze the overall output characteristics of large-scale cluster wind power to be planned in the future, which provides a new idea for studying the impact of wind power on future power systems.
A Method for Constructing Software and Hardware Comprehensive Reliability Test Profile of Y Model
Authors: Huang Maosheng , Yu Min
Published: February 2020

In order to deal with the problem of software intensive equipment reliability evaluation test, this paper analyzes and compares the characteristics and shortcomings of current reli-ability evaluation test and software test, and puts forward the integrated reliability evaluation test technology of software and hardware. Through the design of software profile based on re-liability comprehensive test and matching of software and hardware profile based on task pro-file, the test is carried out by using data automatic loading, and the test evaluation technology of fuzzy software and hardware fault classification is used to evaluate the test. Through the application test of a certain type of airborne equipment, it is shown that the reliability identification test technology of software and hardware integration can effectively expose the fault of software-intensive equipment, which is in line with the requirements of the current development of equipment and weapons, and has a good application prospect.
A Simple Smart Shop Floor Paradigm for Industry 4.0
Authors: Yang Yan , He Xiaohui , Lu Peng , Wang Ziqi , Tang Shixiong
Published: February 2020

This paper illustrates the needs and challenges of the smart shop floor in intelligent manufacturing and combines with insights from the field of current MES system needs, advantages and drawbacks, and describes the cloud platform enrich production service system. In a word, recent advanced technologies has paved way for a complete and systematic implement of it. the smart shop floor is in the initial stage of development in factory. At present, there is an urgent need for a viable paradigm of smart shop floor as a guideline. By integrating all relative applications and solutions, Chongqing Guangshu Robot Co., Ltd has designed a simple enough paradigm to adopt the Industry 4.0, within which all related information is closely monitored and synchronized between the physical shop floor and the network computational space.
Computer Simulation Study on Dynamic Recrystallization Mechanism of Magnesium Alloy during Compound Deformation
Authors: Wang Lingyi , Wang Zhongtang
Published: February 2020

The evolution law of dynamic recrystallization structure in the process of indentation-flattening compound deformation technology (IFCDT) of AZ31 magnesium alloy was studied. A computer simulation method for dynamic recrystallization structure evolution process was proposed based on cellular automata theory (CA method). Firstly, the material model of cellular automata method is established. Secondly, the performance parameters and compound deformation parameters of AZ31 magnesium alloy were determined. Finally, the dynamic recrystallization process of AZ31 magnesium alloy during compound deformation was analyzed. During the compound deformation of AZ31 magnesium alloy, the dynamic recrystallization mechanism is initial state, nucleation of new grains, generation of new grains, growth of new grains, continuous growth of new grains, and covering of original large grains. Compared simulation results with experimental results, the maximum relative errors is 15.4%. It is proved that cellular automaton method may be used to predict the microstructure evolution of AZ31 magnesium alloy during indentation-flattening compound deformation.
Design and research of elevator control system based on PLC
Authors: Han Xiaohu
Published: February 2020

With the gradual popularization of high-rise buildings in China, the elevator control system has also achieved rapid development, and the relevant design is constantly improving and optimizing. For the elevator system, the advantage of PLC control system is that it can use the elevator control system of PLC, and its later maintenance cost is lower. In this paper, the hardware and software design of the elevator control system based on PLC are tested, and the operation of the implementation process is carried out.
Applications Research of Electrical Control Circuit Design
Authors: Zhang Hong
Published: February 2020

Electrical control circuit design plays an important role in electrical engineering projects. Good design of electric control circuit will be beneficial to the orderly operation of power system. Unreasonable design of electric control circuit will hinder the normal operation of power system. This paper mainly discusses the importance of electrical control circuit design, and points out that electrical control circuit design should follow the principles of generality, stability and economic. This paper also discusses the design methods and key points of electrical control circuit, and gives the design ideas of down lead lines and distribution boxes, which provides references for the relevant researchers.
The influence of friction component buckling on the vibration characteristic of the wet clutch
Authors: Zhang Qianqian , Chen Man , Xue Jiaqi , Ma Biao , Li Huizhu
Published: February 2020

The multi-disc wet clutch is widely used in high-power vehicles and large construction machinery due to its capacity for high torque transfer and compact efficiency. However, the early-stage failure such as the buckling of the friction disk is hard to detect since its external performance is not obvious, which can impair the reliability of the system largely. This paper presents an online fault diagnosis method for wet clutch based on vibration signal analysis to detect the deformation of the friction components. A bench test is designed to acquire the vibration signal of the clutch pack with four different fault levels. Then an online monitoring method for clutch early fault based on wavelet analysis and EMD algorithm is proposed. The analysis shows that the method can extract the abnormal vibration characteristics and shock signals caused by the local deformation of the clutch pair, which can be feasible in the engineering practice of online fault diagnosis for multi-disc clutch early failure.
A Thermal Casing Connection Test for Geothermal Wells in KS ORKA
Authors: Sungkar M Fahmi , Simanjuntak Hendra , Isa Boga , Ashadi Ashadi , Hartono Yudi
Published: February 2020

Determining the proper casing and its connection for geothermal wells is very crucial. The casing and its connection experience various loads not only during drilling operations but also during production operations. In order to determine the suitable connections, various loads to the casings and connection during drilling and production are simulated. This paper presents the testing protocol used to qualify the Premium NS-CC connection used by KS ORKA (Sorik Marapi and Sokoria), a geothermal operator in Indonesia on the 13 3/8” 68# L80 Type 1 production casing. The testing protocol is referred to the ISO/PAS 12835:2013, Thermal Well Casing Connection Evaluation Protocol (TWCCEP), with some abbreviation. The test was conducted using 2+2 casing specimens at PT Citra Tubindo testing facility in Batam, Indonesia. Total of 30 thermal load cycles at the temperature range of 35° – 290°C have been used to anticipate geothermal well life time as requested by KS ORKA drilling team. This paper summarizes the testing process from beginning to the end and the successful testing result of the NS-CC Premium casing connections that are used in KS ORKA (Sorik Marapi and Sokoria).
Square Kilometre Array hit by 250m euro shortfall
Authors: Cartlidge Edwin
Published: February 2020

Scientists finalizing plans for the world’s largest radio telescope are in a race against time to try and plug at least some of a €250m hole in the project’s finances.
China's military links to universities revealed
Authors: Allen Michael
Published: February 2020

China’s state-owned defence conglomerates have a substantial presence in at least nine research labs in the UK. That is according to an analysis carried out by the Australian Strategic Policy Institute (ASPI) that looked into Chinese military links with foreign universities.
Towards a sustainable future
Authors: Elliott Dave
Published: February 2020

Dave Elliott says that, while renewable energy has rapidly progressed over the past decade, more needs to be done to help limit the impact of climate change
Bad business models
Authors: McKenzie James
Published: February 2020

Some business models might seem crazy. But they’re not mad if they work, as James McKenzie explains
Self-regulating behaviour helps ants avoid traffic jams
Authors: Dumé Belle
Published: February 2020

Ants are particularly good at avoiding traffic jams even when they occupy more than 80% of the available space – twice the value that stymies human pedestrians or drivers.
A structure of punctual dimension two
Authors: Melnikov Alexander , Ng Keng Meng
Published: February 2020

This paper contributes to the general program which aims to eliminate an unbounded search from proofs and procedures in computable structure theory. A countable structure in a finite language is punctual if its domain is

ω
\omega

and its operations and relations are primitive recursive. A function

f
f

is punctual if both

f
f

and

f

−
1

f^{-1}

are primitive recursive. We prove that there exists a countable rigid algebraic structure which has exactly two punctual presentations, up to punctual isomorphism.
40 Quality Improvement Project: A Pilot Study of A High-Risk Podiatry Service Model Introduced Into A Care Home
Authors: Roe N
Published: February 2020

Introduction

This report aims to demonstrate how a podiatry service quality improvement project into a residential care home was implemented and why it was needed. Risk of foot ulceration increases in those with age, neuropathy, peripheral vascular disease and immobility. In 2013 the Sunderland Care Commissioning Group piloted, through the readmission scheme, a podiatry service providing specialist care into 11 care homes in the Coalfield’s locality of Sunderland, which are a mixture of both nursing and residential homes. The service provides, foot care for all residents and prevention strategies for those classed at risk of developing foot ulceration and to provide specialist wound care interventions for residents presenting with foot ulcers into each care home in the Coalfield’s locality. There are financial constraints to rolling out the Coalfield’s model to the further 36 care homes in Sunderland. Therefore, a new model was explored. This is a high-risk model only, piloted in one care home.

Methods

Driver diagram was used to define key problems, activities required to deliver improvement. Fish bone diagram was used to establish the route cause analysis. The plan do study act (PDSA) cycles were used to pilot the interventions at the study site to ensure effective small change The Comb-B Behaviour Change Wheel was also included to ensure that interventions undertaken were sustainable by identifying the behavioural change required.

Results

There were no pressure injuries identified at post-intervention, this was a significant improvement from baseline. Staff had referred three grade 1 pressure injuries and one foreign body, one foot pain and two trauma ulcers during the intervention, showing a 300% increase in reported grade 1 pressure injuries.

Conclusions

This quality improvement project has demonstrated a person centred, evidence based, older person service delivery for sustainable future that embeds a multi-disciplinary team to the high-risk podiatry model of service. It has shown that behavioural change has occurred with small change interventions. It has used the robust methodology of PDSA to effect this change and allow for a clear report to be able to articulate the benefit.