bluuebunny/crossref_metadata_2025 huggingface dataset:
Apollo 11 Commemorative Coins Available Today
Authors: Showstack Randy
Published: January 2019

The coins commemorate the upcoming fiftieth anniversary of the historic Moon landing and the first steps on the Moon.
T6SS contributes to gut microbiome invasion and killing of an herbivorous pest insect by plant-beneficial Pseudomonas protegens
Authors: Vacheron Jordan , Péchy-Tarr Maria , Brochet Silvia , Heiman Clara Margot , Stojiljkovic Marina , Maurhofer Monika , Keel Christoph
Published: January 2019

Pseudomonas protegens are multi-talented plant-colonizing bacteria that suppress plant pathogens and stimulate plant defenses. In addition, they are capable of invading and killing agriculturally important plant pest insects that makes them promising candidates for biocontrol applications. Here we assessed the role of type VI secretion system (T6SS) components of type strain CHA0 during interaction with larvae of the cabbage pest Pieris brassicae. We show that the T6SS core apparatus and two VgrG modules, encompassing the respective T6SS spikes (VgrG1a and VgrG1b) and associated effectors (RhsA and Ghh1), contribute significantly to insect pathogenicity of P. protegens in oral infection assays but not when bacteria are injected directly into the hemolymph. Monitoring of the colonization levels of P. protegens in the gut, hemolymph, and excrements of the insect larvae revealed that the invader relies on T6SS and VgrG1a module function to promote hemocoel invasion. A 16S metagenomic analysis demonstrated that T6SS-supported invasion by P. protegens induces significant changes in the insect gut microbiome affecting notably Enterobacteriaceae, a dominant group of the commensal gut bacteria. Our study supports the concept that pathogens deploy T6SS-based strategies to disrupt the commensal microbiota in order to promote host colonization and pathogenesis.
LINC01939 inhibits the metastasis of gastric cancer by acting as a molecular sponge of miR-17-5p to regulate EGR2 expression
Authors: Chen Mi , Fan Li , Zhang Si-Min , Li Yong , Chen Peng , Peng Xin , Liu Dong-Bo , Ma Charlie , Zhang Wen-Jie , Zou Zhen-Wei , Li Pin-Dong
Published: January 2019

Accumulating evidence have suggested that long noncoding RNAs (lncRNAs) are known to regulate diverse tumorigenic processes. Recently, a novel lncRNA LINC01939 was underexpressed and emerged as a tumor suppressive lncRNA in gastric cancer (GC). In this study, we aimed to investigate the biological function and molecular mechanism of LINC01939 in GC. We found that LINC01939 expression was significantly downregulated in GC tissues and cell lines. Low expression of LINC01939 was correlated with tumor metastasis and shorter survival in GC patients. Functionally, LINC01939 overexpression remarkably inhibited the invasion and migration of GC cells in vitro and in vivo. Mechanistically, LINC01939 regulated the expression of early growth response 2 (EGR2) protein by competitively binding to miR-17-5p. Upregulation of miR-17-5p reversed GC metastasis and EMT process caused by LINC01939 by rescue analysis. Taken together, these results suggested that LINC01939 repressed GC invasion and migration by functioning as a ceRNA for miR-17-5p to regulate EGR2 expression. Our findings provided a novel prognostic marker and therapeutic target for GC patients.
RAE1 promotes BMAL1 shuttling and regulates degradation and activity of CLOCK: BMAL1 heterodimer
Authors: Zheng Xulei , Zhao Xu , Zhang Yingying , Tan Hao , Qiu Bojun , Ma Tengjiao , Zeng Jiarong , Tao Dachang , Liu Yunqiang , Lu Yilu , Ma Yongxin
Published: January 2019

Circadian rhythm is an autoregulatory rhythm, which is sustained by various mechanisms. The nucleocytoplasmic shuttling of BMAL1 is essential for CLOCK translocation between cytoplasm and nucleus and maintenance of the correct pace of the circadian clock. Here we showed that RAE1 and NUP98 can promote the degradation of BMAL1 and CLOCK. Knockdown of RAE1 and NUP98 suppressed BMAL1 shuttling, leading to cytoplasm accumulation of CLOCK. Furthermore, Chip assay showed that knockdown of RAE1 and NUP98 can enhance the interaction between CLOCK: BMAL1 and E-box region in the promoters of Per2 and Cry1 while reducing its transcription activation activity. Our present study firstly revealed that RAE1 and NUP98 are critical regulators for BMAL1 shuttling.
The surprisingly facile formation of Pd(i)–phosphido complexes from ortho-biphenylphosphines and palladium acetate
Authors: Montgomery Michelle , O'Brien Harry M. , Méndez-Gálvez Carolina , Bromfield Caitlin R. , Roberts Jack P. M. , Winnicka Anna M. , Horner Andrew , Elorriaga David , Sparkes Hazel A. , Bedford Robin B.
Published: January 2019

Heating Pd(OAc)2 with ortho-biphenylphosphine ligands in alcoholic solvents gives facile P–C bond-cleavage, yielding Pd(i)-dimers bridged by phosphide ligands.
Cation sensing by luminescent high-nuclearity Zn–Eu Schiff base nanoscale complexes: high sensitivity to Ag+ and Cd2+ ions at the ppm level
Authors: Jiang Dongmei , Yang Xiaoping , Chen Hongfen , Wang Fei , Wang Shiqing , Zhu Ting , Zhang Lijie , Huang Shaoming
Published: January 2019

Two types of Zn–Ln nanoscale complexes were constructed using Schiff base ligands, and the 12-metal Zn–Eu complex shows interesting luminescent sensing of metal cations.
Approaching the Yablonovitch limit with free-floating arrays of subwavelength trumpet non-imaging light concentrators driven by extraordinary low transmission
Authors: Prajapati Ashish , Chauhan Ankit , Keizman Dor , Shalev Gil
Published: January 2019

Metamaterials based on arrays of subwavelength dielectric structures have recently proved to be a viable research tool towards the realization of various photonic devices.
Facile Buchwald–Hartwig coupling of sterically encumbered substrates effected by PNP ligands
Authors: Kathewad Neha , M. C. Anagha , Parvin Nasrina , Parambath Sneha , Parameswaran Pattiyil , Khan Shabana
Published: January 2019

We employed Ph2PN(Ar)PPh2 ligands for the palladium catalyzed C–N cross coupling of a variety of sterically demanding substrates and isolated very good yield of coupling products.
Intramolecular hydrogen-bonding-assisted phosphine-catalysed [3 + 2] cyclisation of ynones with o-hydroxy/amino benzaldehydes
Authors: Deng Zhi-Xiong , Xie Zhen-Zhen , Zheng Yu , Xiao Jun-An , Wang Rui-Jia , Xiang Hao-Yue , Yang Hua
Published: January 2019

A new strategy for the synthesis of functionalized tetrahydrofuran derivatives was developed via a phosphine-catalysed [3 + 2] annulation reaction of aromatic aldehydes with 4-phenylbut-3-yn-2-one.
Retraction: Synthesis of Fe3+-incorporated open-framework gallium borate catalyst for photocatalytic CO2 reduction driven by visible light irradiation
Authors: Li Qiaoqi , Zhang Lili , Zhao Pusu , Yin Jingzhou , Xia Jun , Sheng Zhenhuan , Wang Fei , Wang Zhigang , Yin Chengzhu , Lin Jianhua
Published: January 2019

Retraction of ‘Synthesis of Fe3+-incorporated open-framework gallium borate catalyst for photocatalytic CO2 reduction driven by visible light irradiation’ by Qiaoqi Li et al., Inorg. Chem. Front., 2018, DOI: 10.1039/c8qi01101j.
Correction: Efficient formation of oil-in-oil Pickering emulsions with narrow size distributions by using electric fields
Authors: Rozynek Z. , Bielas R. , Józefczak A.
Published: January 2019

Correction for ‘Efficient formation of oil-in-oil Pickering emulsions with narrow size distributions by using electric fields’ by Z. Rozynek et al., Soft Matter, 2018, 14, 5140–5149.
Expression of concern: Black mesoporous anatase TiO2 nanoleaves: a high capacity and high rate anode for aqueous Al-ion batteries
Authors: Keltie Sam
Published: January 2019

Expression of concern for ‘Black mesoporous anatase TiO2 nanoleaves: a high capacity and high rate anode for aqueous Al-ion batteries’ by Ying Juan He et al., J. Mater. Chem. A, 2014, 2, 1721–1731.
Involvement of serum amyloid A1 in the rupture of fetal membranes through induction of collagen I degradation
Authors: Wang Wang-sheng , Li Wen-jiao , Wang Ya-wei , Wang Lu-yao , Mi Ya-bing , Lu Jiang-wen , Lu Yi , Zhang Chu-yue , Sun Kang
Published: January 2019

The de novo synthesis of serum amyloid A1 (SAA1) is augmented in human fetal membranes at parturition. However, its role in parturition remains largely unknown. Here, we investigated whether SAA1 was involved in the rupture of fetal membranes, a crucial event in parturition accompanied with extensive degradation of collagens. Results showed that SAA1 decreased both intracellular and extracellular COL1A1 and COL1A2 abundance, the two subunits of collagen I, without affecting their mRNA levels in human amnion fibroblasts. These reductions were completely blocked only with inhibition of both matrix metalloproteases (MMPs) and autophagy. Consistently, SAA1 increased MMP-2/9 abundance and the markers for autophagic activation including autophagy related (ATG) 7 (ATG7) and the microtubule-associated protein light chain 3 β (LC3B) II/I ratio with the formation of LC3 punctas and autophagic vacuoles in the fibroblasts. Moreover, the autophagic degradation of COL1A1/COL1A2 and activation of MMP-2/9 by SAA1 were blocked by inhibitors for the toll-like receptors 2/4 (TLR2/4) or NF-κB. Finally, reciprocal corresponding changes of SAA1 and collagen I were observed in the amnion following spontaneous rupture of membranes (ROM) at parturition. Conclusively, SAA1 may participate in membrane rupture at parturition by degradating collagen I via both autophagic and MMP pathways. These effects of SAA1 appear to be mediated by the TLR2/4 receptors and the NF-κB pathway.
Bidirectional boost converter for high‐power transmission between energy storage battery and DC microgrid
Authors: Song Weiwei , Chen Yanfeng , Zhang Yongjun , Wen An , Wei Chengzhi
Published: January 2019

When the energy storage battery (ESB) is introduced into the DC microgrid, the DC microgrid can perform demand side management well. To achieve flexible charge and discharge controls of the ESB, the grid‐connected device of the ESB needs to have a bidirectional power transmission control function with constant power. Based on this, this Letter first designs circuit topology of bidirectional boost converter for high‐power transmission between the ESB and the DC microgrid. Secondly, the control system based on the staggered timing trigger mechanism is developed, and the working process of the converter in the forward and reverse transmission of power is analysed. Finally, the bidirectional boost converter and its control system are verified by real‐time digital simulator platform. Simulation results show that the proposed converter and its control system can realise stable high‐power bidirectional transmission between the ESB and the DC microgrid, and achieve accurate tracking of the power reference value.
Influence of different time series on load recovery following faults in the vessel regional distribution system
Authors: Yan Qingsong , Ye Zhihao , Ji Feng , Gao Xueping
Published: January 2019

The network reconfiguration of a vessel power system (VPS) is one of the most important approaches to restore its power supply and improve its survivability. The current research on the reconfiguration mainly focuses on the selection and optimisation of recovery paths, with little consideration of the influence of recovery time series. The limited capacity of the VPS, many loads of the motor load and large starting current have a great impact on the electric‐energy quality of the power system. Therefore, the different recovery time series will affect the system performance and the recovery rate. The effect of the different recovery time series on the network reconfiguration and fault control has been analysed through the simulation of target network to determine the corresponding relationship between the residual power‐supply capacity, the load recovery time series and the recovery rate, which can provide the basis of studying an optimal recovery strategy.
The Fornax 3D project: Unveiling the thick disk origin in FCC 170; possible signs of accretion
Authors: Pinna F. , Falcón-Barroso J. , Martig M. , Sarzi M. , Coccato L. , Iodice E. , Corsini E. M. , de Zeeuw P. T. , Gadotti D. A. , Leaman R. , Lyubenova M. , McDermid R. M. , Minchev I. , Morelli L. , van de Ven G. , Viaene S.
Published: January 2019

We present and discuss the stellar kinematics and populations of the S0 galaxy FCC 170 (NGC 1381) in the Fornax cluster, using deep MUSE data from the Fornax 3D survey. We show the maps of the first four moments of the stellar line-of-sight velocity distribution and of the mass-weighted mean stellar age, metallicity, and [Mg/Fe] abundance ratio. The high-quality MUSE stellar kinematic measurements unveil the structure of this massive galaxy: a nuclear disk, a bar seen as a boxy bulge with a clear higher-velocity-dispersion X shape, a fast-rotating and flaring thin disk and a slower rotating thick disk. Whereas their overall old age makes it difficult to discuss differences in the formation epoch between these components, we find a clear-cut distinction between metal-rich and less [Mg/Fe]-enhanced populations in the thin-disk, boxy-bulge and nuclear disk, and more metal-poor and [Mg/Fe]-enhanced stars in the thick disk. Located in the densest region of the Fornax cluster, where signs of tidal stripping have been recently found, the evolution of FCC 170 might have been seriously affected by its environment. We discuss the possibility of its “preprocessing” in a subgroup before falling into the present-day cluster, which would have shaped this galaxy a long time ago. The thick disk displays a composite star formation history, as a significant fraction of younger stars co-exist with the main older thick-disk population. The former subpopulation is characterized by even lower-metallicity and higher-[Mg/Fe] values, suggesting that these stars formed later and faster in a less chemically evolved satellite, which was subsequently accreted. Finally, we discuss evidence that metal-rich and less [Mg/Fe]-enhanced stars were brought in the outer parts of the thick disk by the flaring of the thin disk.
Principle of Fredholm image reconstruction in the vignetting zone of an externally occulted solar coronagraph
Authors: Aime C. , Theys C. , Rougeot R. , Lantéri H.
Published: January 2019

Aims.This study is carried out in the context of data processing of the solar coronagraph ASPIICS of the future formation-flying mission Proba-3, which is expected to provide images of the corona very close to the limb. There will be a transition zone of the order of 100 arcsec close to the limb, where the telescope aperture suffers a strong vignetting by the external occulter (a disc of 1.42 m at 144 m). The instrument response in this region will vary rapidly both in shape and in integrated intensity, the latter being particular to the external occultation. The aim of this paper is to propose a technique to recover as much as possible of the image of the corona very close to the limb in the vignetting zone.

Methods.The object image relationship in this zone is not defined by the usual convolution but by the more general Fredholm integral of the first kind. Theoretical aspects of the problem are detailed in the context of a matrix formalism for the inversion of the Fredholm integral, formalism that we maintain up to the end of the numerical simulations, which is specific to the present work. The iterative Richardson-Lucy algorithm, specially written for the non-constant integrated intensity of the responses is used here for reconstruction. A study of the effect of noise on a photodetected image is made.

Results.An important part of the work consisted in calculating the elements of the transfer matrix between the object and the image for a simulation on a small region of size 100 × 100 arcsec sampled over 128 × 128 pixels. This is obtained propagating the light through the system using a previously published approach. On a toy object, the reconstruction is excellent down to about 60 arcsec from the limb, corresponding to a vignetting of 50%. The drawback is that the recovery of aN × Nobject requires the handling of aN2 × N2matrix, i.e. a 16384 × 16384 transfer matrix here. However, taking into account radial symmetries of the experiment, we propose the use of a transformation from Cartesian to polar coordinates which allows to apply the same procedure all around the sun as for a small region.
Evidence for diffuse molecular gas and dust in the hearts of gamma-ray burst host galaxies
Authors: Bolmer J. , Ledoux C. , Wiseman P. , De Cia A. , Selsing J. , Schady P. , Greiner J. , Savaglio S. , Burgess J. M. , D’Elia V. , Fynbo J. P. U. , Goldoni P. , Hartmann D. H. , Heintz K. E. , Jakobsson P. , Japelj J. , Kaper L. , Tanvir N. R. , Vreeswijk P. M. , Zafar T.
Published: January 2019

Context. Damped Lyman-α (DLA) absorption-line systems at the redshifts of gamma-ray burst (GRB) afterglows offer a unique way to probe the physical conditions within star-forming galaxies in the early Universe.

Aims. Here we built up a large sample of 22 GRBs at redshifts z > 2 observed with VLT/X-shooter in order to determine the abundances of hydrogen, metals, dust, and molecular species. This allows us to study the metallicity and dust depletion effects in the neutral interstellar medium at high redshift and to answer the question of whether (and why) there might be a lack of H2 in GRB-DLAs.

Methods. We developed new methods based on the Bayesian inference package, PyMC, to FIT absorption lines and measure the column densities of different metal species as well as atomic and molecular hydrogen. The derived relative abundances are used to FIT dust depletion sequences and determine the dust-to-metals ratio and the host-galaxy intrinsic visual extinction. Additionally, we searched for the absorption signatures of vibrationally-excited H2 and carbon monoxide.

Results. We find that there is no lack of H2-bearing GRB-DLAs. We detect absorption lines from molecular hydrogen in 6 out of 22 GRB afterglow spectra, with molecular fractions ranging between f ≃ 5 × 10−5 and f ≃ 0.04, and claim tentative detections in three additional cases. For the remainder of the sample, we measure, depending on S/N, spectral coverage and instrumental resolution, more or less stringent upper limits. The GRB-DLAs in our sample have on average low metallicities, [X/H]¯ ≈ −1.3, comparable to the population of extremely-strong QSO-DLAs (log N(H I) > 21.5). Furthermore, H2-bearing GRB-DLAs are found to be associated with significant dust extinction, AV > 0.1 mag, and dust-to-metals ratios DTM > 0.4, confirming the importance of dust grains for the production of molecules. All these systems exhibit neutral hydrogen column densities log N(H I) > 21.7. The overall fraction of H2 detections in GRB-DLAs is ≥ 27% (41% including tentative detections), which is three to four times larger than in the general QSO-DLA population. For 2 < z < 4, and considering column densities log N(H I) > 21.7, the H2 detection fraction is 60–80% in GRB-DLAs and in extremely strong QSO-DLAs. This is likely due to the fact that both GRB- and QSO-DLAs with high neutral hydrogen column densities are probed by sight-lines with small impact parameters, indicating that the absorbing gas is associated with the inner regions of the absorbing galaxy, where the gas pressure is higher and the conversion of H I to H2 takes place. In the case of GRB hosts, this diffuse molecular gas is located at distances ≳ 500 pc from the GRB and hence is unrelated to the star-forming region where the event occurred.
Modeling and analyzing the Russian fuel and energy production and consumption in interaction with its national and regional economies
Authors: Buzulutskov Vladimir , Lyubimova Ekaterina , Markova Vitalia , Suslov Nikita , Tchurashev Viktor
Published: January 2019

This paper discusses issues of a system energy modeling and the approaches to modeling and studies carried out in this field and by the Institute of Economics and Industrial Engineering, Siberian Branch of the Russian Academy of Science. The SONAR-Energy project, being developing by the Institute, includes several models of the national and regional energy systems of Russia, including those from macrolevels to models of large energy units. A central model (OMMM-Energy) belongs to the category of MRIO models, though it has its own features. A modern version includes 6 regions of Russia and 45 sectors of the national economy. It is applied to predict the development of the energy sector of Russia within its national economy and to assess efficiency of large energy projects implementation. A final part of the paper discusses what consequences the displacement of Russian coal and gas from European markets would bring to the economy of the country.
Institutions of international energy cooperation in North-East Asia region
Authors: Korneev Konstantin , Korneev Anatoly
Published: January 2019

The article deals with the problems of international energy cooperation (IEC) development in North-East Asia region (NEA). There is a process of gradual formation of common regional energy markets, which requires the improvement of international cooperation institutions. At the moment this process is in early stage, but the experience of such integration structures as the European Union and NAFTA (North American Free Trade Agreement) demonstrates that energy cooperation can be effective and beneficial to all participants. The countries of NorthEast Asia need to develop international electricity grids and natiral gas pipelines, which stimulates the evolution of common energy markets institutions with the active participation of both government bodies and private energy companies. Keywords: energy cooperation, energy policy, institutions, North-East Asia region.
Simulation models to study development of the coal industry as energy sector component
Authors: Takaishvili Liudmila
Published: January 2019

This paper presents simulation models constructed at Melentiev Energy Systems Institute of SB RAS to study prospects of the coal industry development in Russia and its regions. The models are implemented within the information and model software COAL, which includes four types of models: three types of balance models and a model intended to assess investment projects of enterprises and their groups. The balance models differ in the level of detail of representing the coal industry in regions. The presented models may be applied both jointly with the existing optimization models and independently.
Cogeneration and power export as factors of the Nogliki gas turbine power plant expansion
Authors: Lachkov Georgiy , Fedyaev Andrey
Published: January 2019

The paper focuses on the prospects for expansion of the Nogliki gas turbine power plant in terms of potential cogeneration of the Nogliki urban-type settlement of the Sakhalin region and power export from the Sakhalin Island to Japan. The state and problems of the Nogliki gas turbine power plant and heating systems of Nogliki are described. The alternatives of the Nogliki power plant expansion by upgrading with addition of hot-water heat recovery boilers and shift of part of thermal load of Nogliki from boiler plants to the gas turbine power plant. The excess power in this case is planned to be exported to Japan.
The effect of density and height of vegetation in open channel on the Manning’s coefficient
Authors: Rizalihadi Maimun
Published: January 2019

One of an important parameter to study water flow in channel is Manning’s coefficient (n). This coefficient is produced not only from material forming the channel, but also due to presence of vegetation in channel. The aim of research is to study the effect of vegetation density and height on Coefficient of Manning in open channel. The study was conducted in open channel with 15.5 m long, 0.5 m wide and 1.0 m high. At the center of 3 m long of channel is planted with Sweet flag (Acorus calamus). The impact of various densities and heights of sweet flag were examined using fixed discharge to measure velocity and slope energy. Coefficient of Manning was obtained using Manning’s equation. Statistical analysis of variance with significance level of 0.05 was adopted to evaluate the effect of variables. The result showed that increasing density and height of Sweet flag make decreasing velocity and increasing Coefficient of Manning to be 0,043-0,064, or 1.40-2.10 times compared to un-vegetated channel (no=0.031). Based on statistical analysis, it is found that Fcalc=15.646 and 16.928 for vegetation density and height respectively, which is larger than FStat=2,603. It can be concluded that density and height of vegetation significantly influence on Coefficient of Manning.
The effect of laterite stone as filler on marshall stability hot mix asphalt AC-WC
Authors: Istiar  , Adi Tri Joko Wahyu , Sutikno  , Rahmat  , Kencanawati Martheana , Siara Ilham
Published: January 2019

The highway is the main transportation infrastructure in Indonesia. Most of the highway pavement construction in Indonesia is flexible pavement. The filler commonly used in hot mixture asphalt is Portland Cement. Along with the issue of sustainable development and utilization of local materials, fillers are often replaced with cheaper and easily available materials. One material that can be used as a filler, cheaper and easily available is Laterite.

The experiment was proposed to find out whether laterite could be used as filler material on Asphalt Concrete Wearing Course (AC-WC). The method and technical specification of experiment referred to Asphalt Pavement Specification, that published by Public Work Ministry of Indonesia. The experiment had another objective. The experiment would be examine whether laterite percentage variation on filler material that mixed with Portland Cement, would effect on Marshall Stability value. The filler material was a mixture of laterite and Portland Cement, which the proportion of each were 0:100, 50:50, and 100:0. Each proportion of filler material compacted with 75 and 400 blows. There were 3 samples of each combination of the proportions of the filler material. The total number of specimens were 18. Furthermore, the Marshall stability value of each specimen would be tested using ANOVA test. And ANOVA test used Software Minitab 16.

The experiment result showed, Marshall Stability was greater than 800 kilograms as asphalt concrete wearing course (AC-WC) specification requirement. Analysis of Variance (ANOVA) test results using Minitab 16 software showed no difference in Marshall stability value on all specimens. Because, P-value of Laterite and compaction combination were less than 0.05.
The pull-out test on knit bamboo reinforcement embedded into concrete beam
Authors: Nuralinah Devi
Published: January 2019

The pull-out test is generally conducted to obtain accurately the carrying capacity of the flexural strength of the knit bamboo reinforced concrete beam, which is more determined by the bonding strength than the tensile strength of reinforcement in concrete. Bamboo bar with braid knit which was coated with sikadur as bonding agent based on selected epoxy resin was expected to improve a good friction with concrete. In the pull-out test method, a hydraulic jack was applied to encourage bamboo embedded into a pair of concrete blocks, whose size was 15cm x 30cm x 40cm. The experimental variable of specimens were types of knitted bamboo, and type of coating. Based on the test results, either the bond strength or the tensile strength, which was calculated based on the failure mechanism, increased with respect to the concrete quality. The compressive strength of concrete was averaged as much as 25,97 MPa. The usage of outer skin surface on the cutting braid knit bamboo (type 1), which was coated with sikadur experimentally could increase the pull-out load. In the pull-out test, bond failure occurred with using of the plain bamboo bar with the bond stress of 1.18 MPa, while tensile failure occurred with using of knit bar type 1 with peak tensile strength of 85.84 Mpa.
Construction Management, Construction Method and System, Optimization and Innovation in Structural Design
Authors: Prayogo Doddy
Published: January 2019

In recent years, a number of studies have successfully transformed various models for biological collective behavior into intelligent optimization algorithms. These bio-inspired optimization techniques have been developed to provide better solutions than traditional methods to a variety of engineering problems. This paper attempts to apply and compare recent bio-inspired algorithms for determining the best layout of construction temporary facilities. To validate the performance of the proposed techniques, an actual building construction project was used as a test problem. Based on the obtained results, the performance of each bio-inspired algorithm is highlighted and discussed. This paper presents beneficial insights to decision-makers in the construction industry that are involved in handling optimization problems.
Investigating Building Information Modelling (BIM) Adoption in Indonesia Construction Industry
Authors: Hatmoko Jati Utomo Dwi , Fundra Yulian , Wibowo Mochamad Agung , Zhabrinna
Published: January 2019

The development of information technology continues to evolve to respond the increasing demand and challenges in the construction industry. Building Information Modelling (BIM) emerges in recent years as the fresh solution to make the project lifecycle more efficient by encouraging collaborative working of all stakeholders involved in the construction project, i.e. owners, consultants, and contractors. This study aims to investigate BIM adoption and implementation in Indonesia construction industry and explore challenges and opportunities related to the implementation of BIM. A combination of qualitative and quantitative research method has been adopted for this exploratory research. Data was collected through interviews and questionnaires survey with snowball sampling from twenty entities, consisting of 12 contractors, 4 consultants, and 4 owners. The results show that 60% of respondents have already acknowledged and implemented BIM. The examples of BIM software used by the respondents include Revit, Tekla, and SmartPlan®. Benefits of BIM implementation as perceived by most respondents, e.g. design collision detection, clear project simulation, reduced reworks, and efficient use of resources. The adoption of BIM, however, still faces challenges, such as the absence of requirement and demand, and high investment cost. This research provides an initial understanding of current BIM adoption in Indonesia, which can be used as the basis to develop a national strategic framework for BIM adoption in Indonesia construction industry.
Study on life cycle costing: a case of building for private high school in Jakarta
Authors: Kaming Peter F , Yahya Ogy Ade
Published: January 2019

There are increasing awareness of life cycle costing (LCC) by the management who has lengthy experience in operation and maintenance of the building. Maintenance of buildings includes replacement, updating, and repair building components in accordance with predetermined standards. This research aim at identifying building maintenance practices of a private high school Building in Jakarta. This instrument of the study was referred to Regulation of Minister of Public Works. Another aim is to identify service life of the building components, and conducts 25 years life cycle cost plan for the school management by adopting model of LCC from ISO 15686 part 5. Research data obtained by distributing questionnaires to the Section of Maintenance 30 persons, and school teachers 68 persons. Result showed that the implementation of the management school provides a score of 4.6 out of 5 scale and considered as a very good maintenance performance for the building. To confirms whether the user perception on the operating and maintenance efforts, a similarly assessment were obtained from direct users who provide a good category. From the results of life cycle costing, the study shows that: for long-term life cycle cost plan, the proportion cost for 1) construction, 2) operational, and 3) replacement and maintenance are 46%, 39% and 15% respectively.
The execution of infrastructure project life-cycle
Authors: Willar Debby , Waney Estrellita V. Y. , Senduk Novatus
Published: January 2019

The significant increase in Indonesian construction sector activity nowadays is also influenced by government financing for infrastructure projects. Therefore, the government needs to ensure that the infrastructure projects are consistently constructed along the project life-cycle. Phases of the infrastructure project life-cycle implemented in the Ministry of Public Works and Housing consist of 1) planning, 2) selection of service providers, 3) construction processes, and 4) construction product hand-over. Data collection using three rounds of Delphi Study was undertaken to empirically test the level of implementation of the project life-cycle indicators, which are used as standards to construct infrastructure projects. The respondents of the studies came from sectors who were executing infrastructure projects in the areas of Cipta Karya, Bina Marga, Sumber Daya Air, and Penyediaan Perumahan. The results of the studies concluded that the sectors have understood and implemented most of the indicators, however, different levels of implementation have existed along with the barriers of the implementation. From the studies, profiles of the execution of infrastructure project life-cycle were provided as references for the government to evaluate the performance of the sectors, as well as to take corrective actions to improve their performance.
Analysis Factors Affecting the Outcomes of Skilled Construction Workers Training in the Region of Central Sulawesi Province
Authors: Nirmalawatf  , Labombang Mastura , Fadjar Adnan
Published: January 2019

Skilled workers in the field of construction is increasingly in demand along with the development of infrastructure development, especially in the region of central Sulawesi Province. Because of that therefore it is needed skilled workers that has the compotent. So that many training of skilled workers. The purpose of this research is (1) to know the factors that influence the results of the training of skilled workers; (2) to evaluate the training model with the conditions of skilled workers in the region of Central Sulawesi Province. The research used quantitative, descriptive-correlational approach. Data collection by distributing questioners and structured interviews to contractors, field supervisors and project owners of Central Sulawesi Province as respondents. Data analysis using descriptive statistics, the value of Relative Rank Index (RRI) used to determine the important factors in sequence.The result of the research concludes that: (1) The most important factor of skilled workers training of Central Sulawesi Province; learning process, the ability factor of the instructor and the support of facilities and infrastructures; (2) The results of the evaluation the training model in accordance with the conditions using Project Based Learning Methods, because in accordance with the conditions of Central Sulawesi Province which has a different location project.
Analysis of price fairness toward work quality and user satisfaction for architectural network
Authors: Farini Amalia N. , Nugroho Arief S.B.
Published: January 2019

Construction business is still considered as a prominent business in the entire cities in Indonesia, including Yogyakarta. Contractors compete to get project either by tender or direct order. Both methods will certainly affect the price offered by the contractors. The research aims to understand how big the price gap between tender method and direct order for architectural works along with the work quality and the owner’s satisfaction. Furthermore, several buildings in Yogyakarta become the sample of this research. The research data were collected using questionnaire, direct assessment, as well as direct interview with the contractors. The data obtained were analysed descriptively and statistically using SPSS software. The price gap between tender and direct order is 0,42% more expensive tender. On the tender method, the unit price increases followed by the increase in quality and user satisfaction. On direct order work, the price increase is followed by the increase in quality but decreased satisfaction.
Cost prediction model based on system dynamics in water resource project
Authors: Hirijanto  , Mundra I Wayan , Utomo Addy
Published: January 2019

Project’s cost is one of important components in project achievement. Because of the uniqueness of construction projects, cost estimation always differs from project to project. The rate of cost components always change over time make difficult to forecast the cost for the upcoming project. The cost component consists of many influencing variables where there is interrelationship each other affecting to the total project cost. This paper objective is to develop a cost prediction model to assist the project planners in cost estimation for future projects. System dynamic is one of the appropriate methods to analyse system behaviour with interrelationship referring to the historic data, so it is able to predict the future project. Developing the model, primary and secondary data are collected from previous studies, interview with the government planner and survey in Malang Regency. The model simulation is Brick work unit with its components. Data from last thirteen years are used to verify and validate the developed model by causal loop diagram as a basic method in system dynamic. The finding showed that the model is closed to real condition through the validation mechanism. The developed system is useful in decision making of budget planning based on work quantity.
Application of 2D spatial imaging method for identification of a fault lines and subsurface landslide at “Taman Unnes”, Semarang, Indonesia
Authors: Lashari Lashari , Kusumawardani Rini , Cahyadi Upomo Togani , Supriyadi Supriyadi , Mugiayulhaq Ajiwirani
Published: January 2019

In the last five years, landslide occurred many times in this area. The worst landslide was in 2014, which destroyed many houses and infrastructure such as road, water supply utilities and electricity. This study proposed an identification of landslide method by using of geo electricity as subsurface investigation of landslide. This study aims to identify the type of landslide and slip surface potential by using emergence of 2D spatial imaging. The application of geophysical has not been used as a result of landslide identification. The well-known argument state that geophysical is the only way to make images on the type and rock by using resistivity. The geological and soil physical properties required by engineers to analyse landslide potential are not well presented. As a consequence, the solution of soil reinforcement on landslide prone area to minimize the risk is presented as an engineering judgment of problem solving. Therefore, this paper discusses about soil properties and imaging to identify the area affected by future landslide. By using a multi-electrode electrical array, the 2D geophysical imaging was used to investigate the complex structure of soil stratigraphy and geological properties. The results showed that the area of the study was shown as a stable area with andesite intrusion. In addition, some areas were suspected as landslide prone area which was indicated resources by saturated clay of soil beneath.
Assessment of Reinforced Concrete Building for Disaster Reduction Strategy in Padang City, West Sumatra, Indonesia
Authors: Juliafad Eka , Melinda Annisa Prita
Published: January 2019

Padang City, West Sumatra province is one of the most vulnerable cities in the west coast of Indonesia. Together with the increase in population in Padang City, the number of the building is also increasing. Meanwhile, researchers predicted that Padang City is facing the impendence of mega-earthquake with magnitude more than 8 in scale Richter (SR). The last Earthquake with magnitude 7.6 SR caused fatality with more than 1200 people died and almost 3000 others were injured. Most of the victims injured due to the collapse and damage of buildings, especially the Reinforced Concrete (RC) structure. To reduce the damage due to seismic load as the preparation for the future earthquake, the assessment of the element at risk subjected to the seismic load in Padang City is essential. The predominant building typology in Padang City is RC building. Using the Applied Element Method that can show structural response till collapse state, has been simulated typical low-rise RC infilled wall building in Padang City with the consideration of its different on concrete quality based on local concreting workmanship. Incremental Dynamic Analysis (IDA) by using some ground motion has been used to observe the structural response. The damage states and damage pattern has been judged based on HAZUS criteria. The results show that local compaction method affected the concrete compression quality, that also influences the building performance which is subjected to earthquake loads.
Evaluation of various GIS-based methods for the analysis of road traffic accident hotspot
Authors: ZahranEl-Said M. M. , Soon Jiann Tan , ’Asri Putra Nurul Amirah ’Atiqah Binti Mohamad , Tan Eng Hie Angel , Yap Yok Hoe , Rahman Ena Kartina Abdul
Published: January 2019

In order to establish objective criteria for road traffic accident (RTA) hotspots, this paper examines the application of three different hotspot analysis methods to both identify and rank the RTA hotspots. The three methods selected are the network Kernel Density Estimation (KDE+) method, the Getis-Ord GI* method, and a recently proposed risk-based method that accounts for RTA frequency, severity and socioeconomic costs - STAA method. The study road, Jalan Tutong, is a major dual-carriageway connecting major residential and commercial areas from the west of Brunei-Muara district and beyond to the capital, Bandar Seri Begawan. The RTA data consists of cases reported to the police during a 5-year period from 2012 to 2016. The RTA data were digitised and prepared, before being imported into ESRI ArcGIS 10.2 software for analysis using each of these methods. The outcomes, particularly the location, extent and priority of the RTA hotspots, are subsequently compared to results from road safety audits, in order to determine the relative merits and drawbacks of each method. The findings from the comparative study would be useful to recommend the most suitable method to identify and rank the RTA hotspots for the study road.
Evacuation egress in high rise building: Review of the current design evacuation solution
Authors: Mansor Hazrina , Sahol Hamid Yazmin , Suliman Nurul Huda , Ahmad Nursafarina , Hamzah Noorfaizah
Published: January 2019

In the aftermath of the September 11th attack, design of tall buildings particularly in the aspect of safety systems and structural robustness, arguably the most crucial issues that is deliberated till to date. Concerning the safety systems specifically on evacuation egress, many novels and innovative evacuation solutions for high rise buildings that have been researched and put forward, for instances Platform Rescue Systems (PRS), Controlled Descent Devices (CDD) and Escape Chutes. Still, the practicability of the existing proposed egress systems to be implemented in the real-life situation and its compliance with the tall building design legislation remain unknown. For developing countries such as Malaysia and United Arab Emirates, tall buildings play a role as an iconic landmark. While countries like China and Hong Kong, tall building is needed due to the scarcity of land and high populations. As more than one hundred tall structure exists in the world, and will be increasing by 2020; therefore, it is urgently needed that existing engineering practices in designing tall building to be reviewed with respect to evacuation egress. The main objective of this paper is to create awareness among developers, consultants and contractors that proper evacuation egress in tall building design and development is a must. This paper provides a comprehensive review of the existing engineering practices on tall building evacuation planning systems and design. Furthermore, the effectiveness of the currently proposed systems and its consideration amongst structural and safety engineers are also reported.
Study of Pavement Condition Index (PCI) relationship with International Roughness Index (IRI) on Flexible Pavement.
Authors: Psalmen Hasibuan Rijal , Sejahtera Surbakti Medis
Published: January 2019

Road is an infrastructure that built to support the movement of the vehicle from one place to another for different purposes. Today, it is often found damage to road infrastructure, both local roads, and arterial roads. Therefore, to keep the pavement condition to remain reliable, in Indonesia has a periodic program by conducting an objective functional inspection of roads regulated by Bina Marga using the International Roughness Index (IRI). However, the IRI examination is not sufficient to represent the actual field condition; it is necessary to perform subjective functional examination by appraising the road one of them is Pavement Condition Index (PCI, ASTM D 6433). This method has been widely applied in some countries because it has many advantages. However, to do this inspection requires considerable cost, then there needs to be a model to get the relationship between these two parameters of the road. The selected case study was arterial road segment in Medan City, that is in Medan inner ring road. Based on the results of the analysis, there is a difference between the functional conditions of PCI and IRI. The equation derived from these two parameters is by exponential regression equation, with equation IRI = 16.07exp-0.26PCI. with R2of 59% with correlation coefficient value (r) of -0.768. The value of R2indicates that PCI gives a strong influence on IRI value.
Effect of Kenaf MCC composition on Thin Film Composite membrane for NaCI Rejection
Authors: Ismail Azman , Tajuddin Ramlah Mohd , Mohktar Hamizah , Ismail Ahmad Fauzi
Published: January 2019

A modified thin film PSf-MCC reverse osmosis membrane was prepared by interfacial polymerization between aqueous MPD and TMC as the organic monomer. Aim of this study is to determine the effect of MCC in membrane formulation and fabrication. The surface and cross section morphology of TFC PSF/MCC membrane shows MCC particle which able to improve hydrophilicity of the membrane. The SEM images showed dense and porous structure of the MCC incorporated membranes. In addition, the water contact angle measurement also confirmed the increased hydrophilicity of the modified membranes. The effect of MCC on membrane matric influence the membrane performance in terms of NaCl rejection and pure water flux. Results showed that TFC PSf/MCC membrane shows NaCl rejection up to 98.9% compared with TFC PSf membrane. TFC PSf/MCC membrane also showed the highest pure water flux which is 3.712 Lm2/hr compare with TFC PSF membrane which is 3.606 Lm2/hr. The overall result proved that MCC particle could improve membrane hydrophilicity hence, increased pure water flux and salt rejection.