bluuebunny/crossref_metadata_2025 huggingface dataset:
Capacitively Coupled Phase-based Dielectric Spectroscopy Tomography
Authors: Jiang Yandan , Soleimani Manuchehr
Published: November 2018

Impedance imaging is an effective approach for non-intrusively reconstruct the distribution of dielectric parameters inside the region of interest. Most common form of impedance imaging is electrical impedance tomography (EIT), which requires direct contact with the medium via electrodes. In this work we present a novel impedance imaging using capacitive coupling which provides a contactless method, totally non-invasive and non-intrusive, by measuring the phase. There are less attentions in many prior works to the phase information of the voltage/current measurements. This work studies for the first time the capacitively coupled electrical phase spectroscopy for contactless dielectric parameter imaging. A 12-electrode capacitively coupled test phantom and a measurement system were used to obtain the phase measurements within a wideband frequency range from 200 kHz to 15 MHz. Background data with different conductivity levels were investigated in the experiments to show a broad application possibility. The forward modelling was implemented by simulation and the image reconstruction based on phase measurements was implemented with the total variation algorithm. The potentials, possibilities and challenges of such capacitively coupled dielectric spectroscopy tomography with phase data are discussed in this work.
Ninjurin1 Plays a Crucial Role in Pulmonary Fibrosis by Promoting Interaction between Macrophages and Alveolar Epithelial Cells
Authors: Choi Seungho , Woo Jong Kyu , Jang Yeong-Su , Kang Ju-Hee , Hwang Jong-Ik , Seong Je Kyung , Yoon Yeo Sung , Oh Seung Hyun
Published: November 2018

The transmembrane nerve injury-induced protein 1 (Ninjurin1 or Ninj1) is involved in progressing inflammatory diseases. In this study, we aimed to investigate a novel function of Ninj1 in pulmonary fibrosis. We found that the expression of Ninj1 in a patient cohort was upregulated in the lung specimens of idiopathic pulmonary fibrosis patients as well as mice with bleomycin-induced pulmonary fibrosis. In addition, the BLM-injected Ninj1 KO mice exhibited a mild fibrotic phenotype, as compared to WT mice. Therefore, we hypothesized that Ninj1 would play an important role in the development of pulmonary fibrosis. We discovered that Ninj1 expression increased in BLM-treated macrophages and alveolar epithelial cells (AECs). Interestingly, macrophages bound to BLM-treated AECs were activated. However, when Ninj1 expression was suppressed in either of AECs or macrophages, contact-dependent activation of macrophages with AECs was diminished. In addition, introduction of recombinant mouse Ninj11–50 to macrophages triggered an inflammatory response, but did not stimulate Ninj1-deficient macrophages. In conclusion, we propose that Ninj1 may contribute to activation of macrophages by enhancing interaction with AECs having elevated Ninj1 expression due to injury-inducing stimuli. Consequently, Ninj1 may be involved in the development of pulmonary fibrosis by enhancing inflammatory response of macrophages.
Pyrrolidines and piperidines bearing chiral tertiary alcohols by nickel-catalyzed enantioselective reductive cyclization of N-alkynones
Authors: Liu Guodu , Fu Wenzhen , Mu Xingye , Wu Ting , Nie Ming , Li Kaidi , Xu Xiaodong , Tang Wenjun
Published: November 2018

Pyrrolidines and piperidines are important building blocks in organic synthesis. Numerous methods exist for constructing substituted pyrrolidines and piperidines. However, efficient syntheses of pyrrolidines and piperidines bearing chiral tertiary alcohols are limited. Here we report an efficient enantioselective nickel-catalyzed intramolecular reductive cyclization of N-alkynones. A P-chiral bisphosphorus ligand DI-BIDIME is designed and applied in the synthesis of tertiary allylic siloxanes bearing pyrrolidine and piperidine rings in high yields and excellent enantioselectivities, with triethylsilane as reducing reagent. The highest turn over number achieved is 1000 (0.1 mol% catalyst loading) with > 99:1 er. This reaction provides a practical way to synthesize pyrrolidine and piperidine derivatives with chiral tertiary alcohols from easily accessible starting materials under mild conditions. The products can be scaled up and transformed to various useful chiral intermediates. The P-chiral bisphosphorus ligand developed in this study represents one of the few ligands for highly enantioselective cyclization of alkynones.
Transcriptomic study of Herpes simplex virus type-1 using full-length sequencing techniques
Authors: Boldogkői Zsolt , Szűcs Attila , Balázs Zsolt , Sharon Donald , Snyder Michael , Tombácz Dóra
Published: November 2018

Herpes simplex virus type-1 (HSV-1) is a human pathogenic member of the Alphaherpesvirinae subfamily of herpesviruses. The HSV-1 genome is a large double-stranded DNA specifying about 85 protein coding genes. The latest surveys have demonstrated that the HSV-1 transcriptome is much more complex than it had been thought before. Here, we provide a long-read sequencing dataset, which was generated by using the RSII and Sequel systems from Pacific Biosciences (PacBio), as well as MinION sequencing system from Oxford Nanopore Technologies (ONT). This dataset contains 39,096 reads of inserts (ROIs) mapped to the HSV-1 genome (X14112) in RSII sequencing, while Sequel sequencing yielded 77,851 ROIs. The MinION cDNA sequencing altogether resulted in 158,653 reads, while the direct RNA-seq produced 16,516 reads. This dataset can be utilized for the identification of novel HSV RNAs and transcripts isoforms, as well as for the comparison of the quality and length of the sequencing reads derived from the currently available long-read sequencing platforms. The various library preparation approaches can also be compared with each other.
Overview and experience of the YODA Project with clinical trial data sharing after 5 years
Authors: Ross Joseph S. , Waldstreicher Joanne , Bamford Stephen , Berlin Jesse A. , Childers Karla , Desai Nihar R. , Gamble Ginger , Gross Cary P. , Kuntz Richard , Lehman Richard , Lins Peter , Morris Sandra A. , Ritchie Jessica D. , Krumholz Harlan M.
Published: November 2018

The Yale University Open Data Access (YODA) Project has facilitated access to clinical trial data since 2013. The purpose of this article is to provide an overview of the Project, describe key decisions that were made when establishing data sharing policies, and suggest how our experience and the experiences of our first two data generator partners, Medtronic, Inc. and Johnson & Johnson, can be used to enhance other ongoing or future initiatives.
Comprehensive geological dataset describing a crystalline rock mass for hydraulic stimulation experiments
Authors: Krietsch Hannes , Doetsch Joseph , Dutler Nathan , Jalali Mohammadreza , Gischig Valentin , Loew Simon , Amann Florian
Published: November 2018

High-resolution 3D geological models are crucial for underground development projects and corresponding numerical simulations with applications in e.g., tunneling, hydrocarbon exploration, geothermal exploitation and mining. Most geological models are based on sparse geological data sampled pointwise or along lines (e.g., boreholes), leading to oversimplified model geometries. In the framework of a hydraulic stimulation experiment in crystalline rock at the Grimsel Test Site, we collected geological data in 15 boreholes using a variety of methods to characterize a decameter-scale rock volume. The experiment aims to identify and understand relevant thermo-hydro-mechanical-seismic coupled rock mass responses during high-pressure fluid injections. Prior to fluid injections, we characterized the rock mass using geological, hydraulic and geophysical prospecting. The combination of methods allowed for compilation of a deterministic 3D geological analog that includes five shear zones, fracture density information and fracture locations. The model may serve as a decameter-scale analog of crystalline basement rocks, which are often targeted for enhanced geothermal systems. In this contribution, we summarize the geological data and the resulting geological interpretation.
Genome-wide polyadenylation site mapping datasets in the rice blast fungus Magnaporthe oryzae
Authors: Marconi Marco , Sesma Ane , Rodríguez-Romero Julio Luis , González María Lourdes Rosano , Wilkinson Mark D.
Published: November 2018

Polyadenylation plays an important role in gene regulation, thus affecting a wide variety of biological processes. In the rice blast fungus Magnaporthe oryzae the cleavage factor I protein Rpb35 is required for pre-mRNA polyadenylation and fungal virulence. Here we present the bioinformatic approach and output data related to a global survey of polyadenylation site usage in M. oryzae wild-type and

Δ

rbp35 strains under a variety of nutrient conditions, some of which simulate the conditions experienced by the fungus during part of its infection cycle.
Columbia Open Health Data, clinical concept prevalence and co-occurrence from electronic health records
Authors: Ta Casey N. , Dumontier Michel , Hripcsak George , Tatonetti Nicholas P. , Weng Chunhua
Published: November 2018

Columbia Open Health Data (COHD) is a publicly accessible database of electronic health record (EHR) prevalence and co-occurrence frequencies between conditions, drugs, procedures, and demographics. COHD was derived from Columbia University Irving Medical Center’s Observational Health Data Sciences and Informatics (OHDSI) database. The lifetime dataset, derived from all records, contains 36,578 single concepts (11,952 conditions, 12,334 drugs, and 10,816 procedures) and 32,788,901 concept pairs from 5,364,781 patients. The 5-year dataset, derived from records from 2013–2017, contains 29,964 single concepts (10,159 conditions, 10,264 drugs, and 8,270 procedures) and 15,927,195 concept pairs from 1,790,431 patients. Exclusion of rare concepts (count ≤ 10) and Poisson randomization enable data sharing by eliminating risks to patient privacy. EHR prevalences are informative of healthcare consumption rates. Analysis of co-occurrence frequencies via relative frequency analysis and observed-expected frequency ratio are informative of associations between clinical concepts, useful for biomedical research tasks such as drug repurposing and pharmacovigilance. COHD is publicly accessible through a web application-programming interface (API) and downloadable from the Figshare repository. The code is available on GitHub.
Molecular or dissociative adsorption of water on clean and oxygen pre-covered Ni(111) surfaces
Authors: Zhu Ling , Liu Chunli , Wen Xiaodong , Li Yong-Wang , Jiao Haijun
Published: November 2018

Water adsorption and dissociation on clean and oxygen pre-covered Ni(111) surfaces have been computed systematically by using density functional theory andab initioatomistic thermodynamics.
Hybrid plasmonic Au–TiN vertically aligned nanocomposites: a nanoscale platform towards tunable optical sensing
Authors: Wang Xuejing , Jian Jie , Diaz-Amaya Susana , Kumah Cindy E. , Lu Ping , Huang Jijie , Lim Daw Gen , Pol Vilas G. , Youngblood Jeffrey P. , Boltasseva Alexandra , Stanciu Lia A. , O'Carroll Deirdre M. , Zhang Xinghang , Wang Haiyan
Published: November 2018

A tailorable Au–TiN hybrid plasmonic nanocomposite with tunable optical functionality has been demonstrated.
Room-temperature hydrogen generation from water and nanoscale Fe catalyzed by Pd
Authors: Ni Ting , Zhang Huan , Zhang Sai
Published: November 2018

Production of pure H2 through a redox reaction between water and Fe nanoparticles at room temperature.
Spirocyclic cladosporicin A and cladosporiumins I and J from a Hydractinia-associated Cladosporium sphaerospermum SW67
Authors: Rischer Maja , Lee Seoung Rak , Eom Hee Jeong , Park Hyun Bong , Vollmers John , Kaster Anne-Kristin , Shin Yern-Hyerk , Oh Dong-Chan , Kim Ki Hyun , Beemelmanns Christine
Published: November 2018

The identification of three new spirocyclic natural products named cladosporicin A, cladosporiumins I and J from the fungus Cladosporium sphaerospermum SW67 is reported.
The expression and biological function of the PHF2 gene in breast cancer
Authors: Zhang Lu , Hui Tian-Li , Wei Yu-Xian , Cao Zhu-Min , Feng Fan , Ren Guo-Sheng , Li Fan
Published: November 2018

The role of PHD Finger Protein 2 (PHF2) as a promoting marker and target for the prognosis and therapy of breast cancer was investigated.
Hierarchical nanostructures of nitrogen-doped molybdenum sulphide for supercapacitors
Authors: Kanade Chaitanya , Arbuj Sudhir , Kanade Kaluram , Kim Ki Seok , Yeom Geun Young , Kim Taesung , Kale Bharat
Published: November 2018

The specific capacitance values describe the effect of urea concentration for nitrogen-doped molybdenum sulphide.
A disposable microcapsule array chip fabricated by ice printing combined with isothermal amplification for Salmonella DNA detection
Authors: He Enqi , Cao Ting , Cai Liangyuan , Guo Dan , Zhou Yinglin , Zhang Xinxiang , Li Zhihong
Published: November 2018

An ice printing fabricated microcapsule array chip is demonstrated based on loop-mediated isothermal amplification for visual salmonella DNA detection.
Experimental study on hydrate anti-agglomeration in the presence of rhamnolipid
Authors: Hou Guodong , Liang Deqing , Li Xiaosen
Published: November 2018

Gas hydrates might cause a potential safety hazard in subsea flow assurance.
Ion-triggered calcium hydroxide microcapsules for enhanced corrosion resistance of steel bars
Authors: Liang Zi , Wang Qian , Dong Biqin , Jiang Bingyin , Xing Feng
Published: November 2018

By exchanging PF6− of the CPILs with Cl−, Ca(OH)2 can penetrate out of the microcapsule through the formed hydrophilic channels.
Large area highly ordered monolayer composite microsphere arrays – fabrication and tunable surface plasmon linewidth
Authors: Ni Haibin , Ge Lu , Liu Xiang , Zhou Ying , Chang Jianhua , Ali Hassan , Pan Chao , Wang Tingting , Wang Ming
Published: November 2018

Surface plasmons on co-assembled large area highly ordered monolayer composite sphere arrays exhibit tunable linewidth.
Bilayer graphene/HgCdTe based very long infrared photodetector with superior external quantum efficiency, responsivity, and detectivity
Authors: Bansal Shonak , Sharma Kuldeep , Jain Prince , Sardana Neha , Kumar Sanjeev , Gupta Neena , Singh Arun K.
Published: November 2018

We present a high-performance bilayer graphene (BLG) and mercury cadmium telluride (Hg1−xCdx=0.1867Te) heterojunction based very long wavelength infrared (VLWIR) conductive photodetector.
Isolation and characterization of biosurfactant-producing and diesel oil degradingPseudomonassp. CQ2 from Changqing oil field, China
Authors: Sun Wuyang , Cao Wenrui , Jiang Mingyu , Saren Gaowa , Liu Jiwei , Cao Jiangfei , Ali Imran , Yu Xinke , Peng Changsheng , Naz Iffat
Published: November 2018

In the present research investigation, 13 indigenous bacteria (from CQ1 to CQ13) were isolated from soil collected from Changqing oil field of Xi'an, China.
Detection of cadmium in soils using laser-induced breakdown spectroscopy combined with spatial confinement and resin enrichment
Authors: Fu Xinglan , Li Guanglin , Tian Hongwu , Dong Daming
Published: November 2018

The determination of heavy metals in soils is of great significance for the monitoring and control of environmental pollution.
Optimum operating parameters of CO2 sorption in turbulent fluidized bed regime using potassium carbonate supported on gamma alumina solid sorbent
Authors: Boonprasop Sutthichai , Sangteerasintop Sasinan , Chalermsinsuwan Benjapon , Piumsomboon Pornpote
Published: November 2018

The promising solid sorbent, potassium carbonate (K2CO3) supported on gamma alumina (γ-Al2O3) prepared through impregnation was inserted into the sorption turbulent riser to determine the optimum operating parameters.
A combined experimental-computational investigation on water adsorption in various ZIFs with the SOD and RHO topologies
Authors: Gao Meizhen , Wang Jing , Rong Zhenghao , Shi Qi , Dong Jinxiang
Published: November 2018

Our results demonstrated that the contribution of vdW interactions is negligible and the contribution of electrostatic interactions plays a dominant role in the water adsorption in ZIFs.
Magnetic solid-phase extraction using a mixture of two types of nanoparticles followed by gas chromatography-mass spectrometry for the determination of six phthalic acid esters in various water samples
Authors: Li Hui , Cao Zhen , Cao Xiaolin , Jiang Zejun , Abd El-Aty A. M. , Qi Yan , Shao Hua , Jin Fen , Zheng Lufei , Wang Jing
Published: November 2018

A mixture of Fe3O4@MIL-100 and Fe3O4@SiO2@polythiophene nanoparticles exhibit high extraction efficiency for PAEs in water.
Tungsten disulfide nanosheets supported poly(xanthurenic acid) as a signal transduction interface for electrochemical genosensing applications
Authors: Yang Jimin , Yin Xuesong , Xia Min , Zhang Wei
Published: November 2018

An electrochemical signal transduction sensing interface for detecting PIK3CA gene was developed based on WS2 nanosheets supported PXa.
Identification of Affective State Change in Adults With Aphasia Using Speech Acoustics
Authors: Gillespie Stephanie , Laures-Gore Jacqueline , Moore Elliot , Farina Matthew , Russell Scott , Haaland Benjamin
Published: November 2018

Purpose

The current study aimed to identify objective acoustic measures related to affective state change in the speech of adults with post-stroke aphasia.

Method

The speech of 20 post-stroke adults with aphasia was recorded during picture description and administration of the Western Aphasia Battery–Revised (Kertesz, 2006). In addition, participants completed the Self-Assessment Manikin (Bradley & Lang, 1994) and the Stress Scale (Tobii Dynavox, 1981–2016) before and after the language tasks. Speech from each participant was used to detect a change in affective state test scores between the beginning and ending speech.

Results

Machine learning revealed moderate success in classifying depression, minimal success in predicting depression and stress numeric scores, and minimal success in classifying changes in affective state class between the beginning and ending speech.

Conclusions

The results suggest the existence of objectively measurable aspects of speech that may be used to identify changes in acute affect from adults with aphasia. This work is exploratory and hypothesis-generating; more work will be needed to make conclusive claims. Further work in this area could lead to automated tools to assist clinicians with their diagnoses of stress, depression, and other forms of affect in adults with aphasia.
Multi‐walled carbon nanotube films for the measurement of the alcoholic concentration
Authors: Giordano Chiara , Filatrella Giovanni , Sarno Maria , Di Bartolomeo Antonio
Published: November 2018

The work shows that a multi‐walled carbon nanotube (MWCNT) film can be used as the sensing element of a low‐cost sensor for the alcoholic concentration in liquid solutions. For this purpose, they investigate the electrical resistance of the film as a function of the isopropanol concentration in a water solution. The analysis reveals a growing resistance with increasing isopropanol concentration and a fast response. The sensing element is re‐usable as the initial resistance value is restored once the solution has evaporated. The electrical resistance increases linearly when the MWCNT film is exposed to common beverages with increasing alcoholic content. This work paves the way for the development of low‐cost, miniaturised MWCNT‐based sensors for quality monitoring and control of alcoholic beverages and general liquid solutions.
Outflows in the inner kiloparsec of NGC 1566 as revealed by molecular (ALMA) and ionized gas (Gemini-GMOS/IFU) kinematics
Authors: Slater R. , Nagar N. M. , Schnorr-Müller A. , Storchi-Bergmann T. , Finlez C. , Lena D. , Ramakrishnan V. , Mundell C. G. , Riffel R. A. , Peterson B. , Robinson A. , Orellana G.
Published: November 2018

Context. Tracing nuclear inflows and outflows in active galactic nuclei (AGNs), determining the mass of gas involved in them, and their impact on the host galaxy and nuclear black hole requires 3D imaging studies of both the ionized and molecular gas.

Aims. We map the distribution and kinematics of molecular and ionized gas in a sample of active galaxies to quantify the nuclear inflows and outflows. Here, we analyze the nuclear kinematics of NGC 1566 via ALMA observations of the CO J:2-1 emission at 24 pc spatial and ∼2.6 km s−1 spectral resolution, and Gemini-GMOS/IFU observations of ionized gas emission lines and stellar absorption lines at similar spatial resolution, and 123 km s−1 of intrinsic spectral resolution.

Methods. The morphology and kinematics of stellar, molecular (CO), and ionized ([N II]) emission lines are compared to the expectations from rotation, outflows, and streaming inflows.

Results. While both ionized and molecular gas show rotation signatures, there are significant non-circular motions in the innermost 200 pc and along spiral arms in the central kpc (CO). The nucleus shows a double-peaked CO profile (full width at zero intensity of 200 km s−1), and prominent (∼80 km s−1) blue- and redshifted lobes are found along the minor axis in the inner arcseconds. Perturbations by the large-scale bar can qualitatively explain all features in the observed velocity field. We thus favor the presence of a molecular outflow in the disk with true velocities of ∼180 km s−1 in the nucleus and decelerating to 0 by ∼72 pc. The implied molecular outflow rate is 5.6 M⊙ yr−1, with this gas accumulating in the nuclear 2″ arms. The ionized gas kinematics support an interpretation of a similar but more spherical outflow in the inner 100 pc, with no signs of deceleration. There is some evidence of streaming inflows of ∼50 km s−1 along specific spiral arms, and the estimated molecular mass inflow rate, ∼0.1 M⊙ yr−1, is significantly higher than the SMBH accretion rate (ṁ = 4.8 × 10−5 M⊙ yr−1).
Innovation of price adjustment mechanisms to support investment in solar power in Germany
Authors: Do Thi Hiep , Clemens Hoffmann
Published: November 2018

It has been widely agreed that to incentivize renewables integration into the power system, not only pricing mechanisms, but price adjustment mechanisms have played a vital role, and it has been true for the German Energiewende. This study is to carry out a detailed analysis of investment results influenced by innovative price adjustment mechanisms from an auto degression rate to a feedback system. Employing linear regression models for the historical data of investment in small-scale rooftop PV projects in Germany, we have found out a better correlation between PV system price and feed-in tariff (92.09%) under quarter feedback and monthly adjustment mechanism compared to an annual feedback system. However, the underinvestment in recent years reveals that a feedback mechanism without specific mathematical shapes was not effective enough in term of meeting the targeted volume. Therefore, further researches are to design mathematical images of feedback mechanism in order to find out the trajectory of electricity price in the future which at the same time satisfies the target of investment and economic effectiveness.
Inductance extraction of Press-Pack IGBT by Considering Displacement Current
Authors: Li Jinyuan , Chen Zhongyuan , Zhang Lei , NI Chouwei , ZHAO Zhibin
Published: November 2018

Taking the displacement current generated by charges accumulation into consideration, this paper presents a inductance extraction method for press-pack IGBT where conductor might not form a closed loop in simulation. Charge accumulating on ends of conductor is considered and then Ampere’s circuital law (ACL) could be meet. Vector potential A also could be affected by displacement current, which leads to a different formulation of partial inductance. A simplified model based on practical structure are used in numerical experiment for comparison between existing method and proposed method.
Research on the control system of an amphibious transmission line Inspection UAV based on fuzzy PID control
Authors: Lu Shengbiao , Xia Liangbiao , Shi ying , Han Xiping , Pang Tong , Cai Ruyi
Published: November 2018

The amphibious UAV combines the advantages of multi rotor UAV and line inspection robot. It can carry out two working modes: air flight and online driving. It can observe the running state of transmission line and improve the quality of patrol. In this paper, a fuzzy PID control algorithm is proposed to make the amphibious UAV flight control more flexible and close to the transmission line, and the simulation and software control process design are carried out.
Analysis of passive interference on radio station from AC UHV power
Authors: GAN Zheyuan , ZHANG Jiangong , ZHAO Jun , Lu ying
Published: November 2018

The problems of Electromagnetic Interference in Airborne Intelligence Radar Stations near the AC UHV Transmission Lines is researched in this paper, which is mainly passive interference. And then analyzed the passive interference of AC UHV lines. It mainly studied the influence of the tower and line on the distance detection performance of the air-to-air intelligence radar of the UHV transmission lines. and integrated the influence of the surface reflection surface, the shadowing effect and the secondary radiation echo interference, Proposed a passive interference protection distance for UHV transmission lines and airborne intelligence radar stations
Analysis on the Influence of Transmission Lines span on Passive Interference in Shortwave
Authors: Lu Ying , Zhao Zhibin , Zhang Jian gong , Gan Zheyuan
Published: November 2018

The passive interference of transmission lines to nearby radio stations may affect the effective reception and transmission of radio station signals. Therefore, the accurate calculation of the electromagnetic scattering of transmission lines under the condition of external electromagnetic waves is the basis for determining the reasonable avoidance spacing of the two. For passive stations operating in short-wave frequencies, passive interference is mainly generated by the tower, and span is one of the most significant factors affecting passive interference. This paper uses the method of moments to carry out the passive interference calculations under normal circumstances, expounds the method of calculating the electromagnetic field of transmission line at the same time. And elaborates the method for calculating the electromagnetic field of the transmission line, obtains the space electric field intensity of the transmission line at the same working frequency and space location of the plane wave. Applying the approximate formula to calculate the formula for the span and critical distance between the observation point and the transmission line.
Analysis on the Influence of the Height of Tower on Passive Interference in shortwave
Authors: Lu Ying , Zhao Zhibin , Zhang Jian gong , Gan Zheyuan
Published: November 2018

The passive interference of transmission lines to nearby radio stations may affect the effective reception and transmission of radio station signals. Therefore, the accurate calculation of the electromagnetic scattering of transmission lines under the condition of external electromagnetic waves is the basis for determining the reasonable avoidance spacing of the two. For passive stations operating in short-wave frequencies, passive interference is mainly generated by the tower. This paper uses the method of moments to perform passive interference calculations under normal circumstances, And elaborates the method for calculating the electromagnetic field of the transmission line, obtains the space electric field intensity of the transmission line at the same working frequency and space location of the plane wave. Uses the approximate formula to inductive the formula for calculating height of tower and the protective distance.
Methodology for Calculating the Potential Maritime Wind Park Area by Taking into Account the Needs of Shipping Sector
Authors: Astrida Rijkure
Published: November 2018

Renewable energy sources (wind energy, solar energy, hydroelectricity, ocean energy, geothermal energy, biomass and biofuels) are alternatives to fossil fuel that help to reduce greenhouse gas emissions, diversify energy supplies and reduce dependency on markets of unsustainable and volatile fossil fuels, particularly oil and gas. Wind energy is one of the renewable energy sources and is considered to be self-renewable as it is the result of the Sun’s activity. Using wind energy is a rapidly developing industry today, and more and more wind turbines are installed worldwide every year, land-based wind turbines being more widespread than offshore ones. In Latvia, spread of land-based wind parks is hampered by unsettled land ownership rights, while the deployment of wind parks in the sea is a new field for all Baltic States. The neighbouring countries Estonia and Lithuania have developed their own projects for offshore wind parks, therefore the topicality of the development of wind farms in the territorial waters of Latvia has also increased. Experts have proposed best options and their locations. When assessing possibilities for development of wind parks and their capacity, the following economic factors were evaluated: construction and connection costs, potential operational costs and energy prices. The aim of this study is to develop the methodology for calculating the area of a potential wind park by considering the safety distance to shipping routes and height of the wind turbines, as well as for calculating the potential capacity of a wind park.
Power generation from low grade waste heat using thermoelectric generator
Authors: Sohel Rana , Arbab Iqbal , Abhijit Date , Aliakbar Akbarzadeh
Published: November 2018

Thermoelectric technology is thought to be a great solution in near future for producing electrical power and recovering low grade waste heat to cut the cost of power generation because of its consistency and eco-friendly affability. Though commercial accessibility of TEG is available currently but heat to electricity conversion efficiency is still low and cost of the module is reasonably high. It’s essential to use the modules competently which is strongly depends on suitable heat exchanger design and selection of proper operating conditions. In this work, TEG module has been selected from the commercially available modules with efficiency of 1.91% for the targeted low-grade waste heat temperature of Th=90°C and Tc=15°C which validated by experiment. Mathematical model has been proposed to simulate TEG based power generation system; the model can predict maximum net power, choose optimum operating conditions and dimensions of heat exchanger. Lab scale design with channel length 1 m, width 0.08 m and gap size 9 mm which is suitable for 50 TEG module (4 mm x 4 mm) have been simulated using proposed mathematical model. For above temperature range, predicted optimum net power was 76.45 W with optimum flow rate 0.94 L/s (56.4 L/min). This lab scale setup will be used for experimental validation of the proposed mathematical model. The obtained results from experiments and simulation are closely matched.
Parameter Identification and Effect of Partial Shading on a Photovoltaic System
Authors: Amin Hajizadeh , Jishnu Warrier Anil Kumar
Published: November 2018

Partial shading cause significant losses to the performance of a photovoltaic (PV) system. So, it is imperative to study effects of partial shading; for that a two-diode model of the experimental setup made. Upon verifying the model with the experimental parameters, a MATLAB/Simulink model is made based on this model. Various shading patterns, the effect of bypass diodes; the effect of overlapping bypass diode is studied on this MATLAB/Simulink model. It is found out that the reduction in power loss is depended on the location of the shaded cell but not the area of the shaded cell. Also, the over-lapping bypass diode configuration has a slight improvement in the PV performance compared to the non-overlapping bypass diode configuration. An experimental test is also conducted by applying different shading pattern and they proves the results are compatible with the simulated results.
Offline Photovoltaic Maximum Power Point Tracking
Authors: Fyali Jibji-Bukar , Olimpo Anaya-Lara
Published: November 2018

As more renewable energy sources are connected to the electrical grid, it has become important that these sources participate in providing system support. It has become needful for grid-connected solar photovoltaics to participate in support functions like frequency support. However, photovoltaic systems need to implement a maximum power tracking algorithm to operate at maximum power and a method for de-loading photovoltaic systems is necessary for participation in frequency support. Some conventional maximum power tracking techniques are implemented in real time and will not adjust their output fast enough to provide system support while other may respond fast but are not very efficient in tracking the maximum power point of a photovoltaic system. This paper presents an offline method to estimate the maximum power voltage and current based on the characteristics of the photovoltaics module available in the datasheet and using the estimated values to operate the photovoltaics at maximum power. The performance of this technique is compared to the conventional technique. This paper also describes how the photovoltaic system can be de-loaded.
Influence of the DC offset on the DFT-based frequency estimation for noised multifrequency signals in PV systems with a DSP processor
Authors: Dariusz Kania , Józef Borkowski
Published: November 2018

Digital signal processing is present in many areas of industry and science. One of them is analyzing multifrequency signals, e.g. in photovoltaic systems. This paper focuses on the frequency estimation of pure signals and signals distorted by AWGN noise in the presence of a DC voltage offset. The used IpDFT estimation method is based on the FFT procedure, I class Rife-Vincent time windows and three points of the spectrum taken to calculations. Measurement time was limited only up to two cycles of a tested signal and the method is very accurate even below one cycle. Obtained results show that additional DC component negatively affect the accuracy. The paper can be very useful because it shows properties of the method in real measurement conditions for various values of parameters.
Electrical Heating Emissions on the Island of Ireland
Authors: William D. Kerr , David M. Laverty , Robert J. Best
Published: November 2018

This paper shows the effect on household greenhouse gas emissions if standalone or supplementary electric heating was to replace conventional heating methods, based on the present day electrical grid. While having the capability to improve future grid effectiveness and dynamic stability through the potential incorporation of demand side management (DSM). The All-Ireland system has been used in this paper as an example of a network which has been experiencing a significant increase in renewable generation. To show the potential of the electric heating methods the characteristics of existing domestic heating systems will be discussed, in terms of their heat output against their exhaust emissions (gCO2e/kWh). This will then be compared to that of the grid CO2 Intensity, showing the frequency and duration of the possible emission savings involved when using electricity as a main or supplementary heating source.
Multi-Resonant based Output Voltage Control of Autonomous Distributed Generators
Authors: Abdelhakim Saim , Rabah Mellah , Azeddine Houari
Published: November 2018

The distributed or decentralized generation electricity constitutes the central stone of various recent energy models, such as the intelligent electrical supply networks. The quality of energy in this type of structure depends primarily on the strategy of control adopted, in order to guarantee proper operation according to the international standards. The strategy of control proposed in this paper uses two control loops. An internal control loop aims at deadening the phenomena of resonance while ensuring the required control dynamic for fast disturbance rejection. As for the external control loop, a multi-resonant composed of a stabilizing state feedback that ensure an asymptotic tracking of the voltage reference with a weak rate of harmonic distortion. Finally, experimental results are presented to show the performances and feasibility of the proposed control strategy.
The Innovative Process in the Interruption of Wind Power in Portugal
Authors: António Brito , Luís Neves
Published: November 2018

The production of energy under a special regime of renewable origin has had a sustainable evolution in Portugal. Since the 1990s, the percentage of renewables has been growing steadily, with special emphasis being given to wind, photovoltaic, mini-hydro, biogas and high-efficiency cogeneration [1]. More recently there has been a strong push in promoting small scale production and self-consumption [2]. There are several periods of time when the country’s electricity load is 100% supplied by renewable energy. There are also periods when surplus renewable energy is exported to Spain. However, there are some periods when production exceeds consumption and it is then necessary to reduce wind power production. In Portugal there is an innovative process underway to carry out this reduction, which was systematized by the General Department of Energy and Geology in Order No. 8810/2015, of August 10. Thus, in the case of wind power plants that receive power reduction orders, the remuneration equivalent to that which is lost is paid by the other producers, through the Last Resort Supplier. Those power plants that have not been interrupted pay a percentage of their power produce to the Last Resort Supplier, to compensate those that have been interrupted. The total of the payments made to the producers whose power plants were interrupted must equal the receipts from those plants that continued to produce energy. This new concept is exemplified in this paper by the wind power cut that occurred on March 12 and 13, 2017 in Portugal. An explanation of what occurred on that day is presented, to understand why this cut was made, having been reached the limits of energy exports to Spain. To implement this new interruptible compensation model it was necessary to develop a mathematical algorithm and include it in the computer application named GPCE - Producers’ Management and Energy Purchase, that belongs to the Last Resort Supplier. When the interruption occurred in March 2017, the computer system worked correctly. The sum of the payments made equaled the sum of the receipts. It should be noted that there was a high degree of discipline shown by the producers.
Industrial Energetic Districts: Impact Analysis on the Global Energy Efficiency and Business Competitiveness
Authors: Lesme Corredor , José Avendaño , Robert Bello , Álvaro Redondo , José Calle , Jesús Viloria
Published: November 2018

Process industries located in emerging economies have relative low levels of production to similar ones located in developed countries, this fact influences the implementation feasibility of cogeneration and/or tri-generation systems that allow a substantial increase in the plant global energy efficiency. In this paper, an energy and economic analysis of several alternatives of cogeneration was done for a company located in Barranquilla (Colombia, South America) that produces vegetable oils and derivatives and its energy matrix is approximately 90% thermal and 10% electric. In this investigation two type of analysis were done, both supported by process simulation software, these are: 1) Taking the plant as the control volume and evaluating the entire electrical demand supply with natural gas engine and turbine – generator, plus exhaust gases heat recovery for refrigeration and/or preheating of thermal oil or water in boilers. 2) As an energy-industrial district, where the company takes advantage of the residual heat of a gas turbine and sells the excess of electrical power to nearby plants, a concept introduced by the authors as Sustainable Energetic Industrial District in Emerging Economies (SEIDEE). The input variable considered for this analysis was electric demand which restricts the technology implementation. It was found that the investment return period is notably lengthy when the thermal machine supplies the electric power demanded by the industrial plant. This period is considerably reduced when the SEIDEE concept is implemented, this period reduction is between 57% and 65%.
Power Scheduling for Renewable Energy Connected to the grid
Authors: Ismail El kafazi , Rachid Bannari , Abdellah Lassioui , My Othman Aboutafail
Published: November 2018

In this work, a scheduling strategy considering an Energy Storage System (ESS) is proposed to manage the distributed energy resources (DERs) optimally in a grid-connected hybrid PV-wind-microgrid. In order to increase the use of the renewable energy sources and ensure a full charge in the battery for the next day. The optimization problem of this study is addressed through a linear mathematical model, to minimize the cost of energy bought from the utility grid and maximize the income for selling electricity generated by hybrid PV-wind. The optimization model is tested by using a simulation of the model. The achieved results confirm the effectiveness of the proposed scheduling strategy.
Understanding Abundance of Litter on Urban Lake in Developing Country: a Systems-thinking Approach
Authors: Muhsin Muhammad , Karuniasa Mahawan , Soeryantono Herr
Published: November 2018

An abundance of litter on urban lake environment has been an issue for decades. This complex issue involves many stakeholders and also couples human socio-economic and natural-environment systems. Understanding the interrelationships among stakeholders and between those two systems is important as a first step for looking the solutions. This paper aims to present a systems-thinking approach to illustrate the relationships among key factors contributing to the issue. We examined Kenanga Lake located on Campus of Universitas Indonesia, Depok City, Indonesia and some part of its catchment area as a pilot project. By conducting field observation and previous literature review, we identified that campus management, municipal government, and citizen are three major stakeholders in the systems. The results showed that lake cleanness contributes to campus image, thus it gives feedback to the city’s economic and population growth. In another side, those growths combined with some socio-cultural aspects have a pathway to perpetuate this problem. The interrelationships among those factors are further illustrated by a conceptual diagram. Finally, this holistic approach diagram can be used to inspire the development of dynamic models for helping decision making.
Municipal Solid Waste Transport Operational Cost of Seberang Ulu Area, Palembang City
Authors: Putri Septi Rika , Muda Khalida , Saggaf Anis , Astuti Dewi
Published: November 2018

Transportation system is an important part of the municipal solid waste management system, and also requires substantial investment and operational costs after the landfill. The further of the service route and the more the number of trucks ritation then the greater the operational costs to be incurred. Transportation system in the research location uses two methods, namely Hauled Container System/HCS (4 units) and Stationary Container System/SCS (19 units), each with 6 m³ capacity. Armroll truck activity analysis found that one time ritation takes an average of 2.72 hours and the average amount of ritation is 3 rit / day. The operational cost required for the armroll truck is 13.433.68 IDR / m³ / day. The result of dump truck activity analysis obtained the average time in one ritation is 4.77 hours, with the amount of ritation of 2 rit / day. Operating cost for dump truck is 25.400.1 IDR / m³ / day so HCS method with armroll truck is more effective than SCS method with dump truck, although the number of units is less in the research location, this is due to the investment cost of the carosery which is slightly larger than the dump truck.
The Characteristics and Potential of Lactic Acid Bacteria as Probiotics in Silage Made from Hymenachne acutigluma and Neptunia oleracea lour
Authors: Sandi Sofia , Yosi Fitra , Sari Meisji Liana , Gofar Nuni
Published: November 2018

This study aims to determine the characteristics of lactic acid bacteria (LAB) obtained from the silage made from Hymenachne acutigluma and Neptunia oleracea Lour to be used as probiotics. This study used a completely randomized design (CRD), which consists of 3 treatments and 5 replications. The treatment consisted of P1 (silage made from Hymenachne acutigluma), P2 (silage made from 50% of Hymenachne acutigluma and 50% of Neptunia oleracea lour), and P3 (silage made from Neptunia oleracea lour). The variables measured were LAB characteristics including shape, gram staining, catalase, endospore, motility, growth at different temperatures, TSIA, MR, VP, and identification using API Kit. The data were analyzed descriptively. The results showed that there were 9 selected isolates. All isolates are rod-shaped, gram-positive, catalase, endospore, and negative motility, growth at 15 °C negative and at 45 °C positive. TSIA slant and butt test show yellow and negative colors on gas and H2S production, while MR-VP is red and yellow. The conclusions of this study were all isolates belonging to the Lactobacillus plantarum strain with a similarity level of 87.3-99.9 %.
DNA Barcoding of Swamp Sediment Bacterial Isolates for Swamp Aquaculture Probiotic
Authors: Wijayanti Marini , Jubaedah Dade , Suhada Januar Ahlan , Yuliani Siti , Saraswati Nabilah , Tanbiyaskur  , Syaifudin Mochamad , Widjajanti Hary
Published: November 2018

Bacteria derived from swamp sediments and aquaculture ponds potential to be probiotics. The study aims to determine the sequence of 16S r RNA gene of isolate of probiotics candidate bacteria from sediment of swamp, to determine the phylogenetic tree between the bacterial species from isolates and Gene Bank data central for their potential as probiotic. The samples of bacteria resulted from pure isolation selected from the sediment of pond cultivation and swamp waters at Lebung Karangan Reservation, Ogan Ilir Regency, Indralaya, South Sumatra. This study was started from cultivating bacteria, extracting DNA of bacteria, amplification 16S r RNA genes by PCR, running electrophoresis, and sequencing the amplicon for determining DNA barcodes of bacteria from sediment of swamp and rearing pond. The result of BLAST analysis showed that KA isolate had the highest similarity 97% withStreptomyces sp.Hjorring101 from Denmark and RA isolate had the highest similarity 98% withStreptomyces sp. BD99 from Pakistan. KE isolate had the highest similarity 99% withBacillus subtilisCESi5 from Japan and RE isolate had the highest similarity 93% withBacillus sp.2bFR from Manado. All of isolates were bacteria potentially as swamp aquaculture probiotics.