bluuebunny/crossref_metadata_2025_split huggingface dataset:
Pemanfaatan Silika (SiO2) dan Bentonit sebagai Adsorben Logam Berat Fe pada Limbah Batik
Authors: Hardyanti Ika Sri , Nurani Isni , Hardjono HP Dyan Septyaningsih , Apriliani Evalisa , Wibowo Emas Agus Prastyo 
Published: October 2018

Industri batik merupakan industri yang potensial dari proses awal hingga proses penyempurnaan diindikasikan penggunaan bahan kimia yang mengandung unsur logam berat. Hasil buangan limbah batik masih mengandung logam berat salah satunya Fe.Kandungan Fe yang tinggi dalam air limbah dapat mencemari lingkungan perairan apabila dibuang ke sungai atau saluran irigasi. Proses adsorpsi merupakan teknik pemurnian dan pemisahan yang efektif dipakai dalam industri untuk mengurangi ion logam berat dalam air limbah. Silika memiliki gugus aktif Si-O-Si dan Si-OH yang dapat digunakan sebagai adsorben logam Fe. Silika bersifat inert, mempunyai sifat adsorpsi dan pertukaran ion yang baik, mudah dimodifikasi dengan senyawa kimia tertentu, kestabilan mekanik dan termal tinggi, serta dapat digunakan untuk prekonsentrasi atau pemisahan analit karena proses pengikatan analit pada permukaan silika bersifat reversible. Telah dilakukan penelitian untuk mengetahui waktu pengadukan yang optimal pada adsorben silika dalam mengadsorpsi logam Fe yang terkandung dalam limbah batik desa Sudagaran, Banyumas.Terdapat empat sampel yang diuji dengan metode AAS masing-masing volumenya 400 mL dan berwarna coklat kemerahan. Sampel 1 belum dilakukan adsorpsi silika atau sebagai kontrol. Sampel 2, 3, dan 4 diadsorpsi silika dengan massa yang sama namun diberi perlakuan variasi waktu. Sampel 2, 3, dan 4 diaduk dengan variasi waktu berturut-turut 20, 40, dan 60 menit. Hasil penelitian menunjukkan bahwa waktu pengadukan 40 menit merupakan waktu yang optimal untuk silika dalam mengadsorbsi logam Fe. Terjadi penurunan kadar Fe dari 0,287 ppm menjadi 0,145 ppm. Sedangkan dengan bentonit terjadi penurunan kadar Fe dari 0,939 ppm menjadi 0,912 ppm. Kata kunci: logam berat, limbah batik, adsorpsi
Simulasi Kontrol 2 Pompa Supplay Air Bersih Menggunakanrelay Change Over Dan Floatless Level Switch (Sebagai Modul Praktek Mahasiswa Ps Teknik Pendingin Dan Tata Udara)
Authors: Sudirman Sudirman , Baliarta I Nyoman Gede 
Published: October 2018

Sistem supplay air bersih pasti ada dipasang disuatu gedung. Tujuan dari penelitian ini adalah untuk menciptakan modul praktek mahasiswa Program Studi Teknik Pendingin dalam mata Kuliah Praktek Utility Gedung dan BAS. Sehingga kompetensi mahasiswa tentang utility gedung, khususnya dibidang system pompa supplai air bersih bisa tercapai dengan lebih mudah. Modul praktek ini menggunakan 2 buah pompa, 2 buah tangki air, 1 sebagai tangki sebagai tangki underground tank dan 1 lagi sebagai tower tank. Menggunakan WLC (water level control) untuk mengontrol hidup mati pompa berdasarkan level air pada tangki tower. Dan menggunakan Relay Change over untuk merubah pompa on duty secara otomatis. Hasil uji kerja alat simulasi ini, saat level air pada tangki tower low level, Pompa 1 akan hidup sampai level air mencapai upper level dan akan Off, secara otomatis Relay change over merubah pompa on duty dari Pompa 1 ke Pompa 2. Pada saat level air mencapai low level lagi di tangki tower, yang hidup adalah Pompa 2.
A Luminous Transient Event in a Sample of WISE-selected Variable AGNs
Authors: Assef R. J. , Prieto J. L. , Stern D. , Cutri R. M. , Eisenhardt P. R. M. , Graham M. J. , Jun H. D. , Rest A. , Flewelling H. A. , Kaiser N. , Kudritzki R.-P. , Waters C. 
Published: October 2018

Abstract
Recently Assef et al. presented two catalogs of active galactic nucleus (AGN) candidates over 30,093 deg2 selected from the Wide-field Infrared Survey Explorer (WISE) observations. From their most reliable sample, Assef et al. identified 45 AGN candidates with the highest variability levels in the AllWISE catalog but that are not blazars. Here we present new spectroscopic observations of some of these targets to further constrain their nature. We also study their optical light curves using observations from the Catalina Real-Time Transient Survey (CRTS) and find that only seven show significant optical variability, and that five of those seven are spectroscopically classified as AGNs. In one of them, WISEA J094806.56+031801.7 (W0948+0318), we identify a transient event in the CRTS light curve. We present a detailed analysis of this transient and characterize it through its CRTS light curve and its multiwavelength spectral energy distribution obtained from GALEX, Pan-STARRS, and WISE observations. We find that the most likely source of the transient is a superluminous supernova (SLSN) in W0948+0318. We estimate the total radiated energy to be E = (1.6 ± 0.3) × 1052 erg, making it one of the most energetic SLSNe observed. Based on the lack of change in mid-IR color throughout and after the transient event, we speculate that the location of the SLSN is within the torus of the AGN. We identify nine possible analogs to W0948+0318 based on their WISE light curves. None show optically detected transients and hence suggest significant dust obscuration. Finally, we estimate a rate of >2 × 10−7 yr−1 per AGN for these transients under the conservative assumption that none of the identified analogs have a common origin with the transient in W0948+0318.
The Role of Flux Cancellation in Eruptions from Bipolar ARs
Authors: Yardley S. L. , Green L. M. , Driel-Gesztelyi L. van , Williams D. R. , Mackay D. H. 
Published: October 2018

Abstract
The physical processes or trigger mechanisms that lead to the eruption of coronal mass ejections (CMEs), the largest eruptive phenomenon in the heliosphere, are still undetermined. Low-altitude magnetic reconnection associated with flux cancellation appears to play an important role in CME occurrence as it can form an eruptive configuration and reduce the magnetic flux that contributes to the overlying, stabilizing field. We conduct the first comprehensive study of 20 small bipolar ARs (ARs) in order to probe the role of flux cancellation as an eruption trigger mechanism. We categorize eruptions from the bipolar regions into three types related to location, and find that the type of eruption produced depends on the evolutionary stage of the AR. In addition, we find that ARs that form eruptive structures by flux cancellation (low-altitude reconnection) had, on average, lower flux cancellation rates than the AR sample as a whole. Therefore, while flux cancellation plays a key role, by itself it is insufficient for the production of an eruption. The results provide supporting evidence that although flux cancellation in a sheared arcade may be able to build an eruptive configuration, a successful eruption depends upon the removal of sufficient overlying and stabilizing field. Convergence of the bipole polarities also appears to be present in regions that produce an eruption. These findings have important implications for understanding the physical processes that occur on our Sun in relation to CMEs and for space weather forecasting.
Simultaneous Spectral Energy Distribution and Near-infrared Interferometry Modeling of HD 142666
Authors: Davies Claire L. , Kraus Stefan , Harries Tim J. , Kreplin Alexander , Monnier John D. , Labdon Aaron , Kloppenborg Brian , Acreman David M. , Baron Fabien , Millan-Gabet Rafael , Sturmann Judit , Sturmann Laszlo , Ten Brummelaar Theo A. 
Published: October 2018

Abstract
We present comprehensive models of the Herbig Ae star, HD 142666, which aim to simultaneously explain its spectral energy distribution (SED) and near-infrared (NIR) interferometry. Our new submilliarcsecond resolution CHARA (CLASSIC and CLIMB) interferometric observations, supplemented with archival shorter baseline data from VLTI/PIONIER and the Keck Interferometer, are modeled using centrosymmetric geometric models and an axisymmetric radiative transfer code. CHARA’s 330 m baselines enable us to place strong constraints on the viewing geometry, revealing a disk inclined at 58° from face-on with a 160° major axis position angle. Disk models imposing vertical hydrostatic equilibrium provide poor fits to the SED. Models accounting for disk scale height inflation, possibly induced by turbulence associated with magnetorotational instabilities, and invoking grain growth to ≳1 μm size in the disk rim are required to simultaneously reproduce the SED and measured visibility profile. However, visibility residuals for our best model fits to the SED indicate the presence of unexplained NIR emission, particularly along the apparent disk minor axis, while closure phase residuals indicate a more centrosymmetric emitting region. In addition, our inferred 58° disk inclination is inconsistent with a disk-based origin for the UX Ori-type variability exhibited by HD 142666. Additional complexity, unaccounted for in our models, is clearly present in the NIR-emitting region. We propose that the disk is likely inclined toward a more edge-on orientation and/or an optically thick outflow component also contributes to the NIR circumstellar flux.
Investigation of the High-energy Emission from the Magnetar-like Pulsar PSR J1119–6127 after the 2016 Outburst
Authors: Lin Lupin Chun-Che , Wang Hui-Hui , Li Kwan-Lok , Takata Jumpei , Hu Chin-Ping , Ng C.-Y. , Hui C. Y. , Kong A. K. H. , Tam Pak-Hin T. , Yeung Paul K. H. 
Published: October 2018

Abstract
PSR J1119−6127 is a radio pulsar that behaved with magnetar-like bursts, and we performed a comprehensive investigation of this pulsar using the archival high-energy observations obtained after its outburst in 2016 July. After the 2016 outburst, specific regions on the neutron star (NS) surface were heated up to >0.3 and >1 keV from ∼0.2 keV. A hard nonthermal spectral component with a photon index <0.5 related to the magnetospheric emission can be resolved from the NuSTAR spectra above 10 keV. We find that the thermal emitting regions did not cool down and gradually shrank by about 20%–35% 4 months after the outburst. Hard X-ray pulsations were detected with NuSTAR immediately after the outburst at a 5σ confidence level and with a background-subtracted pulsed fraction of 40% ± 10%. However, the signal became undetectable after a few days. Using Fermi data, we found that the gamma-ray emission in 0.5–300 GeV was suppressed along with the disappearance of the radio pulsations. This is likely caused by a reconfiguration of the magnetic field. We also discovered that the timing noise evolved dramatically, and the spin-down rate significantly increased after the 2016 glitch. We proposed that postoutburst temporal and spectral behaviors from radio to gamma-ray bands were caused by changes of the magnetosphere structure, pair plasma injection, and the shrinking emission sites on the NS.
The First Tidally Disrupted Ultra-faint Dwarf Galaxy?: A Spectroscopic Analysis of the Tucana III Stream∗

†
Authors: Li T. S. , Simon J. D. , Kuehn K. , Pace A. B. , Erkal D. , Bechtol K. , Yanny B. , Drlica-Wagner A. , Marshall J. L. , Lidman C. , Balbinot E. , Carollo D. , Jenkins S. , Martínez-Vázquez C. E. , Shipp N. , Stringer K. M. , Vivas A. K. , Walker A. R. , Wechsler R. H. , Abdalla F. B. , Allam S. , Annis J. , Avila S. , Bertin E. , Brooks D. , Buckley-Geer E. , Burke D. L. , Rosell A. Carnero , Kind M. Carrasco , Carretero J. , Cunha C. E. , D’Andrea C. B. , Costa L. N. da , Davis C. , Vicente J. De , Doel P. , Eifler T. F. , Evrard A. E. , Flaugher B. , Frieman J. , García-Bellido J. , Gaztanaga E. , Gerdes D. W. , Gruen D. , Gruendl R. A. , Gschwend J. , Gutierrez G. , Hartley W. G. , Hollowood D. L. , Honscheid K. , James D. J. , Krause E. , Maia M. A. G. , March M. , Menanteau F. , Miquel R. , Plazas A. A. , Sanchez E. , Santiago B. , Scarpine V. , Schindler R. , Schubnell M. , Sevilla-Noarbe I. , Smith M. , Smith R. C. , Soares-Santos M. , Sobreira F. , Suchyta E. , Swanson M. E. C. , Tarle G. , Tucker D. L. ,   (DES Collaboration)
Published: October 2018

Abstract
We present a spectroscopic study of the tidal tails and core of the Milky Way satellite Tucana III, collectively referred to as the Tucana III stream, using the 2dF+AAOmega spectrograph on the Anglo-Australian Telescope and the IMACS spectrograph on the Magellan Baade Telescope. In addition to recovering the brightest nine previously known member stars in the Tucana III core, we identify 22 members in the tidal tails. We observe strong evidence for a velocity gradient of

over at least 3° on the sky. Based on the continuity in velocity, we confirm that the Tucana III tails are real tidal extensions of Tucana III. The large velocity gradient of the stream implies that Tucana III is likely on a radial orbit. We successfully obtain metallicities for four members in the core and 12 members in the tails. We find that members close to the ends of the stream tend to be more metal-poor than members in the core, indicating a possible metallicity gradient between the center of the progenitor halo and its edge. The spread in metallicity suggests that the progenitor of the Tucana III stream is likely a dwarf galaxy rather than a star cluster. Furthermore, we find that with the precise photometry of the Dark Energy Survey data, there is a discernible color offset between metal-rich disk stars and metal-poor stream members. This metallicity-dependent color offers a more efficient method to recognize metal-poor targets and will increase the selection efficiency of stream members for future spectroscopic follow-up programs on stellar streams.
MIRIS Paα Galactic Plane Survey. I. Comparison with IPHAS Hα in ℓ = 96°–116°
Authors: Kim Il-Joong , Pyo Jeonghyun , Jeong Woong-Seob , Seon Kwang-Il , Nakagawa Takao , Kim Min Gyu , Park Won-Kee , Lee Dae-Hee , Lee Dukhang , Moon Bongkon , Park Sung-Joon , Park Youngsik , Matsumoto Toshio , Han Wonyong 
Published: October 2018

Abstract
The Multipurpose InfraRed Imaging System (MIRIS) performed the MIRIS Paα Galactic Plane Survey (MIPAPS), which covers the entire Galactic plane within the latitude range of

at Paα (1.87 μm). We present the first result of the MIPAPS data extracted from the longitude range of

–116.°3 and demonstrate the quality and scientific potential of the data by comparing them with Hα maps obtained from the INT Photometric Hα Survey (IPHAS) data. We newly identify 90 H ii region candidates in the WISE H ii region catalog as definite H ii regions by detecting the Paα and/or Hα recombination lines, out of which 53 H ii regions are detected at Paα. We also report the detection of an additional 29 extended and 18 point-like sources at Paα. We estimate the E(B−V) color excesses and total Lyman continuum luminosities for H ii regions by combining the MIPAPS Paα and IPHAS Hα fluxes. The E(B−V) values are found to be systematically lower than those estimated from point stars associated with H ii regions. Utilizing the MIPAPS Paα and IPHAS Hα images, we obtain an E(B−V) map for the entire region of the H ii region Sh2-131 with an angular size of ∼2.°5. The E(B−V) map shows not only numerous high-extinction filamentary features but also negative E(B−V) regions, indicating Hα excess. The Hα excess and systematic underestimation of E(B−V) are attributed to light scattered by dust.
A Comparison between two Dolutegravir-Based two-drug Regimens as Switch Strategies in a Multicentre Cohort of HIV-1-Infected Patients
Authors: Ciccullo Arturo , Baldin Gianmaria , Capetti Amedeo , Rusconi Stefano , Sterrantino Gaetana , d'Ettorre Gabriella , Colafigli Manuela , Modica Sara , Lagi Filippo , Giacomelli Andrea , Cossu Maria Vittoria , Restelli Sibilla , De Luca Andrea , Di Giambenedetto Simona 
Published: October 2018

Background Two-drug regimens are increasingly used in clinical practice as switch strategies. We compared the efficacy and safety of two dolutegravir (DTG)-based dual therapies: DTG plus lamivudine (3TC group) versus DTG plus rilpivirine (RPV group). Methods In a multicentre cohort of virologically suppressed (HIV RNA <50 copies/ml) HIV+ patients switching to DTG+3TC or DTG+RPV we analysed the incidence of virological failures (VF) and treatment discontinuations (TD), as well as their predictors. Results We analysed 416 patients, 229 in the 3TC group and 187 in the RPV group. The 3TC group, during 344.4 person-years of follow-up (PYFU), had 10 VF without the emergence of resistance mutations, while 30 patients discontinued the regimen. In the RPV group, during 371.0 PYFU, there were 5 VF (1 developed non-nucleoside reverse transcriptase inhibitor mutations Y181C and E138Q) and 13 TD. The estimated probability of remaining free from VF at 48 weeks showed no significant difference between groups (log-rank 0.172). We found a higher risk of VF in patients with peak viral load >500,000 copies/ml in both treatment groups (log-rank P=0.004 in each group). The estimated probability of remaining in the study regimen at week 48 was 89.0% with DTG+3TC and 96.1% with DTG+RPV (log-rank 0.015). After adjusting for potential confounders, treatment group was not associated with TD. A significant decrease in total cholesterol was observed at week 48 in both groups while renal function remained unchanged. Conclusions DTG+RPV and DTG+3TC were compared in populations with different characteristics in clinical practice: both regimens showed good effectiveness and improved lipid profile.
Predictive ecological risk assessment of pesticide mixtures in Mediterranean porous aquifers
Authors: Di Lorenzo Tiziana , Cifoni Marco , Fiasca Barbara , Di Cioccio Alessia , Galassi Diana 
Published: October 2018

The ecological risk assessment (ERA) of chemical substances is based on the premise that the protection of the most sensitive taxon safeguards the overall community. Given the severe scarcity of ecotoxicological data concerning groundwater species, we felt urged to consider epigean model species’ sensitivity data to determine the safe pesticide concentrations for obligate groundwater dwelling species. To this end, we performed the ERA of pesticide mixtures occurring in eleven Mediterranean porous aquifers (Abruzzo region; central Italy). The evaluation was based on data collected between 2010 and 2015 by the environmental protection agency of Abruzzo region (ARTA Abruzzo) and included 42 pesticides and 1953 samples. We applied a step-wise procedure:

we used the Measured Environmental Concentration (MEC);

we estimated the Predicted No-Effect Concentration (PNEC) and

we established the ecological risk as Risk Quotient (RQ) based on the ∑MECi/PNECi ratio following a concentration addition model for mixtures’ toxicity.

we used the Measured Environmental Concentration (MEC);
we estimated the Predicted No-Effect Concentration (PNEC) and
we established the ecological risk as Risk Quotient (RQ) based on the ∑MECi/PNECi ratio following a concentration addition model for mixtures’ toxicity.
The PNEC was regarded as the concentration below which a harmful effect will most likely not occur to the groundwater dwelling fauna. The toxicity data used to compute the PNEC values were obtained from the US. EPA ECOTOX database confining the search to epigean crustaceans. Missing toxicity data were estimated by ECOSAR v.1.11. PNEC values were calculated by dividing the lowest short-term L(E)C50 value (that refers to the concentration at which 50% of its maximal effect was observed in test species) by appropriate assessment factors (AF). The AF values were selected according to the difference in the sensitivities of groundwater and epigean crustaceans derived from the available studies. Groundwater crustacean species were generally less sensitive to acute exposure to chemicals than the model species Daphnia magna. However, they were more sensitive than their epigean relatives when the comparisons were made among organisms sharing the same family/order. This result suggests caution when inferring the sensitivity of groundwater species from that of epigean taxa. The ecological risk was scored using a binary ecological classification suggesting that appreciable risk is likely when RQ≥1. Pesticide mixture risks were often driven by a minimum of 2 to 11 compounds in the eleven aquifers of Abruzzo region. However, the risk-drivers (i.e., individual pesticides explaining the largest share of potential effects) differed substantially among the aquifers. The results of this study have been published by Di Lorenzo et al. (2018).
Caves as a source of new antimicrobial agents: the case study of antibacterial activity from microorganisms inhabiting Cerâmica Cave, Portugal
Authors: Gouveia André , Reboleira Ana Sofia , Gonçalves Fernando , Marques Sérgio 
Published: October 2018

Antibiotics have been developed for more than 80 years but presently there is an evident decline on their effectiveness due to the development of resistance by pathogens. The arising of multi drug resistant pathogens, has become a serious threat to public health. Microorganisms play a central role in nature as well as in drug discovery with a long track record as important sources of bioactive natural products revealing a wide array of molecules. Although many approaches have been applied to solve this crisis, in the last decades the focus on extreme habitats as gain attention due to peculiar features and due to the presence of unique microbial populations inhabiting these ecosystems. Caves are considered extreme environments, usually oligotrophic, being in general devoid of light, and presenting stable conditions (temperature, humidity) throughout the year.
We present the first analysis of antimicrobial activity of bacteria isolated from Cerâmica Cave, located in the Sicó karst massif, central Portugal. Microorganism acquisition was performed through a variety of physical and chemical treatments: dry-heat, wet-heat, dry-heat plus phenol (1,5%), phenol (1,5%), microwave irradiation, rehydration centrifugation, and no-treatment, along with three media: R2A agar, Actinomycetes isolation agar and Yeast-malt agar. A primary antimicrobial activity screening, through cross streak method, was performed in 28 isolates, using two different incubation periods and different target agents (Staphylococcus aureus, Bacillus cereus, Klebsiella pneumoniae, Escherichia coli, Pseudomonas aeruginosa, Aeromonas salmonicida, Salmonella typhimurium and Enterococcus faecalis). A total of 7 isolates presented antagonistic activity against B. cereus, P. aeruginosa, E. coli, A. salmonicida S. typhimurium and S. aureus. This study proves the ability of cave microorganisms to inhibit both Gram positive and Gram negative pathogenic strains, highlighting the potential of caves microbiome to be one of the answers to solve the current global crisis of multi drug resistant pathogens.
Les trajectoires de construction de légitimité ou de délégitimation des contrôleurs de gestion
Authors: Demaret Julie 
Published: October 2018

L’objectif de cet article est de comprendre comment les contrôleurs de gestion construisent (ou non) leur légitimité. L’étude est réalisée à partir de trois terrains approfondis avec des études de cas multiples ayant donné lieu à 51 entretiens. Cinq types de trajectoires de construction de légitimité ont été identifiés : le contrôleur chevronné, le contrôleur à potentiel, le contrôleur qui ambitionne de s’orienter vers du management opérationnel, le contrôleur à qui échappe la maîtrise des processus opérationnels, et le contrôleur rejeté. Nous montrons que toutes les stratégies de légitimation des contrôleurs ne sont pas fructueuses. Nous mettons en évidence que ces trajectoires aboutissent à l’obtention prioritaire de certaines natures de légitimité (fonctionnelle et cognitive), et orientent le contrôleur dans une posture de « business partner ».