bluuebunny/crossref_metadata_2025 huggingface dataset:
Pengaruh Penagihan Pajak Dengan Surat Teguran dan Surat Paksa Terhadap Kepatuhan Wajib Pajak di Kantor Pelayanan Pajak Pratama Padang Satu
Authors: Sari Nila , Zulvia Dewi , Widayati Ratna , Septiano Renil
Published: August 2018

The purpose of this study is to examine the effect of tax collection by the forced letter and letter of reprimand against taxpayer compliance at the Tax Office Pratama padang. This research uses multiple linear regression analysis. The result of simple regression analysis shows that the coefficient value of letter warning variable is 0,449. The strike variable has a t test value (titung) of 6.863 with a significance level of 0.000 <0.05. This shows that there is a positive and significant effect of tax collection with letters of reprimand against taxpayer compliance in KPP Pratama Padang. The result of simple regression analysis shows that the coefficient value of the forced letter variable is 0.226. The variable of forced letter has a value of t test (titung) of 2.155 with a significance level of 0.035> 0.05. This shows that there is a positive and significant effect of tax collection with letters of reprimand against taxpayer compliance in KPP Pratama Padang. The results of this research also show that the significance value of the F test is 0.000 which has a value less than 0.05. This means that the collection of taxes with letters of reprimand and forced mail together have a significant effect on taxpayer compliance in KPP Pratama Padang. From result of determination test show that coefficient value of Adjusted R Square is equal to 0,442, it means 44,2% taxpayer compliance variable can be explained by tax collection variable with letter of warning and forced letter. While the rest (100% - 44.2% = 55.8%), influenced by other variables associated with taxpayer compliance Keywords: tax collection, letter of reprimand, forced letter, taxpayer compliance
Synthesis of Dispiro[Indeno[1,2-b]Quinoxaline-11,3′-Pyrrolizine-2′,2″-[1,3] Thiazolo[3,2-a]Pyrimidine Via Cycloaddition Reactions
Authors: Ren Demin , Hu Xiaolian , Huang Yulin , Li Xiaofang
Published: August 2018

The 1,3-dipolar cycloaddition reaction of ethyl 5-aryl-2-(2-methoxy-2-oxoethylidene)-7-methyl-3-oxo-2,3-dihydro-5 H-[1,3]thiazolo[3,2- a] pyrimidine-6-carboxylate and azomethine ylide, which was generated in situ by the reaction of 11 H-indeno[1,2- b]quinoxalin-11-one and L-proline, afforded novel 6″ethyl 1′-methyl 5″aryl-7″methyl-3″oxo-5’,6’,7’,7a′-tetrahydro-1' H,3″ H,5″ H-dispiro[indeno[1,2- b]quinoxaline-11, 3 ‘-pyrrolizine-2’,2″-[1,3]thiazolo[3,2- a]pyrimidine-1’,6″-dicarboxylates in good yields. The structures of all the products were characterised thoroughly by NMR, IR and HRMS together with X-ray crystallographic analysis.
3D technologies in individualized chest protector modelling
Authors:   University of Zagreb Faculty of Textile Technology, Department of Clothing Technology, Croatia, Milosevic Paula , Bogović Slavica ,   University of Zagreb Faculty of Textile Technology, Department of Clothing Technology, Croatia
Published: August 2018

The application of 3D technology increases every day by discovering new ways of usage, which can make everyday life easier. It is most used in production of individualized items that become more accessible and fully customized to personal needs. 3D technologies such as 3D scanning, 3D modelling and additive technologies (3D printing) are used in various areas of human activity such as medicine, architecture, the movie industry, etc. In the clothing’s industry, 3D scanning the human body is digitized, which is after that used in computer software packages for custom-made clothing. Except for the fashion industry, there is a need for individualized protective work clothing and equipment production in other industries as well. The possibility of applying new technologies such as 3D scanning and 3D modelling of protective elements that can be made by using 3D printers is presented in this paper. In order to design a field hockey chest protector, male and female subjects were scanned using a 3D body scanner in several different positions specific to the sport. The chest protector was constructed and modeled based on the digitalized images. Software packages were used which enable point clouds preparation of the digitalized human body for constructing the protector, its modelling and preparation of virtually designed protectors for 3D printing. An individualized chest protector is modeled using a software program called Bender. The protector is integrated into the clothing item, completely follows the body shape and provides the necessary protection.
Revisión de literatura: estilos de aprendizaje
Authors: De la Hoz Juan David , Perez Coronell Leidy , Navarro Beltran Jorge
Published: August 2018

El presente ensayo reflexiona acerca de las ideas y teorías que existen alrededor de los estilo de aprendizaje. Define primeramente a esta herramienta como una de las formas elementales pero decisivas a la hora de adquirir conocimientos. Asimismo, como las preferencias o tendencias generales que una persona utiliza como método propio para aprender. Son estrategias que, de alguna manera, utilizamos cada uno de nosotros para aprender. Aunque unas estrategias concretas pueden variar según lo que intentamos aprender, cada uno de nosotros tiende a desarrollar un sistema global similar. Uno de los objetivos de este ensayo se fundamenta en la necesidad que tenemos las personas de aprender de formas diferentes, de acuerdo a los sentidos que consideramos nos son más útiles al recibir, procesar y responder ante la información que captamos del medio.
Kampf um Arbeitszeit
Authors: Hermann Christoph
Published: August 2018

This article examines the development of weekly working hours put in by wage labour since the introduction of the 40-hour week. It analyses the changes in different periods based on the contentious relationship between socially necessary and actually laboured working hours resulting in predominantly extensive and intensive accumulation regimes. To understand the recent surge in working hours, so one of the main arguments, one has to account for the role of competition as driver of capitalist development and as a mode of social dominance. Conversely the struggle for working time must be understood as a struggle for the limitation of competition through working-class solidarity and the manifestation of a political economy of the working class. The same solidarity also demands for a new definition and a new distribution of socially necessary working time, including paid and unpaid working hours.
Die Rolle von Finanzinvestoren beim Umbau der deutschen Ökonomie
Authors: Beckmann Martin
Published: August 2018

The German economy, for long time characterised by a bank based financial system with capital and personal linkages between the main financial and industrial economies, has been transformed since the 1990s to a market orientated economy. Particularly German banks and insurance companies sold many of their stakes in industrial companies. This gap has been filled by new financial investors like pension funds, hedge funds and private equity.
Staatlichkeit, Gouvernementalität und Neoliberalismus
Authors: Biebricher Thomas
Published: August 2018

The paper examines Foucault's analytics of the state based on the concept and history of governmentality. While the approach has a promising critical-analytical potential, the latter is not always realized in the works of the governmentality studies. These problems that are particularly related to the conceptualisation and analysis of Neo-Liberalism as a governmentality are examined from the perspective of Bob Jessop's Neo-Marxist strategic-relational theory of the state. It is suggested to adopt some of the insights developed in this approach to realize the potential of Foucault's analytlcs of state more thoroughly.
(Post?)Koloniale Auschreitungen
Authors: Ernst Tanja , Isidoro Losada Ana Maria
Published: August 2018

Based on a short overview of the escalating internal political conflict in Bolivia, the article offers a political classification of the present events. In doing so, the central participants, their interests and the main conflict lines between government and opposition are outlined. The article concludes by giving a general indication of the international reactions to the conflict as well as examining the manner in which it has affected US-Bolivian relations.
Steuerwettbewerb ein Ende setzen
Authors: Liebert Nicola
Published: August 2018

The global mobility of capital and the availability of tax havens enable multinational corporations and wealthy individuals to escape tax payments due in their home countries. Most states react by shifting more of the tax burden onto labour and consumption, while lowering corporate tax rates in an effort to remain internationally competitive, thereby creating a tax system that is both inequitable and socially and economically unsustainable. However, there is scant evidence that lower taxes on capital in fact contribute to higher investment, but they do lead to profit shifting for the purpose of tax planning. Alternative tax systems such as unitary taxation could help to stop profit shifting and slow down tax competition.
Die Schweiz als Steueroase
Authors: Missbach Andreas
Published: August 2018

Although Switzerland is not a typical tax haven. Switzerlands legal system has some distinctive features that allows foreign individuals and companies to evade taxes, The most important is the distinction between tax evasion and tax fraud. with only the latter being a criminal offense. Therefore Switzerland gives no juridical or administrative assistance in cases of tax evasion, which has helped the country to become the most important offshore private banking place. Roughly one Third of worldwide crossborder private wealth is managed in Switzerland, between 1.25 to 3.6 trillion francs are not taxed in the country of origin.
Kritik der öffentlichen Finanzen
Authors: Krätke Michael R.
Published: August 2018

This review of radical approaches to public finance starts with Marx' various plans to deal with taxes and public debt. Contrary to the conventional view, the state and its economic power are present in Marx' general theory of capitalism as well as in his theories of crisis. After World War I, a long debate on the the (tax) state" began which has inspired the debates on state interventionism and crisis in the 1970s, James O'Connor's widely influential concept of the "fiscal crisis" of tl,e state is revisited and reassessed within the context of contemporary fiscal crises.
Weder Staat noch Kollektiv
Authors: Wallat Hendrik
Published: August 2018

Even Marx had never written a systematical critique of other socialism's, his whole work is full of commentaries about various forms of them, On the one hand Marx's critical notes are directed against anti-individualistic, authoritarian and etatist conceptions of human emancipation, on the other hand they focus doctrines which perpetuate capitalistic modes of production and social synthesis,
Renaissance der Atomkraft? Vermutlich nicht!
Authors: Mez Lutz , Schneider Mycle
Published: August 2018

The international nuclear lobby is constantly talking about a nuclear renaissance. But nuclear power is rather in the dusk than in the dawn. Missing industrial capacities, skyrocketing costs for raw materials and new nuclear power plants, the dramatic skilled worker/manager shortage and a sceptical financial sector are the main problems of nuclear industry. And nuclear technology as saviour against global warming is no good either.
Kehrt der Staat zurück? Wirtschaftskrise und Demokratie
Authors: Demirović Alex
Published: August 2018

There is some evidence that the crisis of the financial market has leaded – as some critics suggest - to a crisis of neoliberalism, a crisis of finance driven accumulation or even of a structural crisis of capitalism. The reason for this suggestion is the return of state interventionism. But this is misleading because the state intervened alongside with the formation of new owner relations of capital during the last two decades and supporting this new rising fraction of capital was in itself reorganized. The measures undertaken to smooth down the crisis are still part of an ongoing neoliberal political strategy to deal with a long lasting crisis of overaccumulation, probably ending up in an even deeper crisis including a crisis of political crisis management.
To be or not to be a Keynesian – ist das die Frage?
Authors: Stützle Ingo
Published: August 2018

Keynes is back. Not only in the discourse of political economy but also in the debates around an "alternative economic policy". This article outlines Keynes's approach to the political economy of capitalism and offers a critique in the tradition of Marx's critique of classical political economy. It points out the limits and conditions of radical reforms and criticizes the illusions attached to the idea of a new Keynesian project.
Eine Krise des Übergangs
Authors: Boris Dieter , Schmalz Stefan
Published: August 2018

According to common wisdom, the great depression of 2008/2009 is rooted in a financial crisis that spread from the US to most other parts of the world. This interpretation is challenged. Using theoretical concepts of David Harvey and Giovanni Arrighi, the current crisis is analyzed as a switching crisis from one global spatial fix of capital accumulation to another. First, the economic power shifts from the West to semi-peripheral states in East Asia as well as other world regions are identified as one major reason for the development of structural imbalances in world economy. It is analyzed how the structural imbalances – especially between China and the US – tended to deepen the US housing bubble. After the bubble had bursted, the crisis hit different world regions in a different manner. China and other emerging nations in East Asia as well as in South America were able to withstand the crisis due to large stimulus packages, whereas the EU, US and Japan have been deeply affected. The transition in global political economy will be even speeded up by the crisis. Finally, different scenarios of a new map of global power are discussed.
Circulating Tumour DNA in Muscle-Invasive Bladder Cancer
Authors: Tan Melissa P. , Attard Gerhardt , Huddart Robert A.
Published: August 2018

Circulating tumour DNA (ctDNA) is an attractive tool in cancer research, offering many advantages over tissue samples obtained using traditional biopsy methods. There has been increasing interest in its application to muscle-invasive bladder cancer (MIBC), which is recognised to be a heterogeneous disease with overall poor prognosis. Using a range of platforms, studies have shown that ctDNA is detectable in MIBC and may be a useful biomarker in monitoring disease status and guiding treatment decisions in MIBC patients. Currently, with no such predictive or prognostic biomarkers in clinical practice to guide treatment strategy, there is a real unmet need for a personalised medicine approach in MIBC, and ctDNA offers an exciting avenue through which to pursue this goal. In this article, we present an overview of work to date on ctDNA in MIBC, and discuss the inherent challenges present as well as the potential future clinical applications.
Comparative Analysis of Chemical Composition, Anti-Inflammatory Activity and Antitumor Activity in Essential Oils from Siegesbeckia orientalis, S. glabrescens and S. pubescens with an ITS Sequence Analysis
Authors: Gao Xiaoxu , Wei Jiangchun , Hong Lina , Fan Sanpeng , Hu Gaosheng , Jia Jingming
Published: August 2018

Herba Siegesbeckiae (HS), derived from the aerial parts of three plants, Siegesbeckia orientalis (SO), S. glabrescens (SG), and S. pubescens (SP), has been used for the treatment of inflammatory diseases in China for centuries. In the present study, hydrodistillation was applied to extract essential oils from dried SO, SG, and SP aerial parts, and chemical composition analysis by gas chromatography–mass spectrometry (GC-MS) led to the identification of a total of 148 compounds (56 in SO, 62 in SG, and 59 in SP). The main components in the essential oils of SO, SG, and SP differed significantly. In vitro anti-inflammatory activity assays showed that SP essential oils (IC50, 0.97 μg/mL) significantly reduced the ability of lipopolysaccharide (LPS)-stimulated RAW264.7 macrophages to release NO, and the SO essential oil (IC50, 14.99 μg/mL) was better than the others at inhibiting the LPS-induced release of cytokine IL-6. Furthermore, the essential oils exhibited antitumor activities (IC50, 37.72–123.16 μg/mL) against Hep3B (liver) and Hela (cervical) cells. Linear regression analysis showed that, caryophyllene oxide peak area percentages showed remarkably high negative correlation coefficients with IC50 values of Hep3B and Hela cytotoxicity, which suggested the contribution of this compound on the cancer cell cytotoxicity of three essential oils. Finally, the ITS1-5.8S-ITS2 region was amplified and sequenced in order to generate genomic reference sequences for each plant. These can be used to identify the origins of the plants, and will assist other research studies related to these three plants.
FSCPX, a Chemical Widely Used as an Irreversible A1 Adenosine Receptor Antagonist, Modifies the Effect of NBTI, a Nucleoside Transport Inhibitor, by Reducing the Interstitial Adenosine Level in the Guinea Pig Atrium
Authors: Erdei Tamas , Szabo Adrienn Monika , Lampe Nora , Szabo Katalin , Kiss Rita , Zsuga Judit , Papp Csaba , Pinter Akos , Szentmiklosi Andras Jozsef , Szilvassy Zoltan , Juhasz Bela , Gesztelyi Rudolf
Published: August 2018

Based on in silico results, recently we have assumed that FSCPX, an irreversible A1 adenosine receptor antagonist, inhibits the action of NBTI that is apparent on E/c curves of adenosine receptor agonists. As a mechanism for this unexpected effect, we hypothesized that FSCPX might modify the equilibrative and NBTI-sensitive nucleoside transporter (ENT1) in a way that allows ENT1 to transport adenosine but impedes NBTI to inhibit this transport. This assumption implies that our method developed to estimate receptor reserve for agonists with short half-life such as adenosine, in its original form, overestimates the receptor reserve. In this study, therefore, our goals were to experimentally test our assumption on this effect of FSCPX, to improve our receptor reserve-estimating method and then to compare the original and improved forms of this method. Thus, we improved our method and assessed the receptor reserve for the direct negative inotropic effect of adenosine with both forms of this method in guinea pig atria. We have found that FSCPX inhibits the effects of NBTI that are mediated by increasing the interstitial concentration of adenosine of endogenous (but not exogenous) origin. As a mechanism for this action of FSCPX, inhibition of enzymes participating in the interstitial adenosine production can be hypothesized, while modification of ENT1 can be excluded. Furthermore, we have shown that, in comparison with the improved form, the original version of our method overestimates receptor reserve but only to a small extent. Nevertheless, use of the improved form is recommended in the future.
Chemical Profiles and Simultaneous Quantification of Aurantii fructus by Use of HPLC-Q-TOF-MS Combined with GC-MS and HPLC Methods
Authors: He Yingjie , Li Zongkai , Wang Wei , Sooranna Suren R. , Shi Yiting , Chen Yun , Wu Changqiao , Zeng Jianguo , Tang Qi , Xie Hongqi
Published: August 2018

Aurantii fructus (AF) is a traditional Chinese medicine that has been used to improve gastrointestinal motility disorders for over a thousand years, but there is no exhaustive identification of the basic chemical components and comprehensive quality control of this herb. In this study, high-performance liquid chromatography coupled with quadrupole time of flight mass spectrometry (HPLC-Q-TOF-MS) and gas chromatography coupled mass spectrometry (GC-MS) were employed to identify the basic chemical compounds, and high-performance liquid chromatography (HPLC) was developed to determine the major biochemical markers from AF extract. There were 104 compounds belonging to eight structure types, including 13 amino acids or peptides, seven alkaloids, 18 flavanones, 14 flavones, 15 polymethoxyflavonoids, six triterpenoids, nine coumarins, and 18 volatile oils, as well as four other compounds that were systematically identified as the basic components from AF, and among them, 41 compounds were reported for the first time. Twelve bioactive ingredients were chosen as the benchmark markers to evaluate the quality of AF. The analysis was completed with a gradient elution at a flow rate of 0.7 mL/min within 55 min. This efficient method was validated showing good linearity, precision, stability, repeatability and recovery. Furthermore, the method was successfully applied to the simultaneous determination of 12 chemical markers in different samples of AF. This study could be applied to the identification of multiple bioactive substances and improve the quality control of AF.
ELF3, ELF5, EHF and SPDEF Transcription Factors in Tissue Homeostasis and Cancer
Authors: Luk Ian Y. , Reehorst Camilla M. , Mariadason John M.
Published: August 2018

The epithelium-specific ETS (ESE) transcription factors (ELF3, ELF5, EHF and SPDEF) are defined by their highly conserved ETS DNA binding domain and predominant epithelial-specific expression profile. ESE transcription factors maintain normal cell homeostasis and differentiation of a number of epithelial tissues, and their genetic alteration and deregulated expression has been linked to the progression of several epithelial cancers. Herein we review the normal function of the ESE transcription factors, the mechanisms by which they are dysregulated in cancers, and the current evidence for their role in cancer progression. Finally, we discuss potential therapeutic strategies for targeting or reactivating these factors as a novel means of cancer treatment.
Photochemical and Structural Studies on Cyclic Peptide Models
Authors: Nagy Tamás Milán , Knapp Krisztina , Illyés Eszter , Timári István , Schlosser Gitta , Csík Gabriella , Borics Attila , Majer Zsuzsa , Kövér Katalin E.
Published: August 2018

Ultra-violet (UV) irradiation has a significant impact on the structure and function of proteins that is supposed to be in relationship with the tryptophan-mediated photolysis of disulfide bonds. To investigate the correlation between the photoexcitation of Trp residues in polypeptides and the associated reduction of disulfide bridges, a series of small, cyclic oligopeptide models were analyzed in this work. Average distances between the aromatic side chains and the disulfide bridge were determined following molecular mechanics (MM) geometry optimizations. In this way, the possibility of cation–π interactions was also investigated. Molecular mechanics calculations revealed that the shortest distance between the side chain of the Trp residues and the disulfide bridge is approximately 5 Å in the cyclic pentapeptide models. Based on this, three tryptophan-containing cyclopeptide models were synthesized and analyzed by nuclear magnetic resonance (NMR) spectroscopy. Experimental data and detailed molecular dynamics (MD) simulations were in good agreement with MM geometry calculations. Selected model peptides were subjected to photolytic degradation to study the correlation of structural features and the photolytic cleavage of disulfide bonds in solution. Formation of free sulfhydryl groups upon illumination with near UV light was monitored by fluorescence spectroscopy after chemical derivatization with 7-diethylamino-3-(4-maleimidophenyl)-4-methylcoumarin (CPM) and mass spectrometry. Liquid cromatography-mass spectrometry (LC-MS) measurements indicated the presence of multiple photooxidation products (e.g., dimers, multimers and other oxidated products), suggesting that besides the photolysis of disulfide bonds secondary photolytic processes take place.
Application of an Improved Multipoint Optimal Minimum Entropy Deconvolution Adjusted for Gearbox Composite Fault Diagnosis
Authors: Cai Wenan , Wang Zhijian
Published: August 2018

The fault feature extraction of gearbox is difficult to achieve under complex working conditions, and this paper presents a hybrid fault diagnosis method for gearbox based on the combining product function (CPF) and multipoint optimal minimum entropy deconvolution adjusted (MOMEDA) methods. First, ensemble local mean decomposition (ELMD) is utilized to reduce the noise in original signal, and get a series of product functions (PFs), through the correlation coefficient method to remove false components and residual components. Then, multi-point kurtosis of the definition is achieved by calculating the multi-point kurtosis spectrum of each layer PF, and the fault feature period is extracted and the PFs without periodic impact are removed. After that, in order to maintain the integrity of the original signal, the PFs with the same period are recombined by the combined product function method. Finally, the different cycle interval is configured, reduce the noise through MOMEDA on the combined signal, to further extract the fault feature. The method is applied to the feature extraction of gear box composite fault to verify the feasibility of this method.
The Service Supply Effect of Cooperatives under Economic Transformation: A Demand-Supply Perspective
Authors: Wu Xiangyu , Ding Yunlong
Published: August 2018

As an important part of the sustainable development of agriculture in China, cooperatives have become a hot topic. However, previous literature has mixed results on the relationship between quantity growth and service supply effect of cooperatives. By conducting multiple correspondence analysis, descriptive statistics, and Pearson’s chi-square test on survey data of 785 farmers, this paper aims to describe the characteristics of cooperatives’ members and evaluate the current state of cooperatives’ service supply from a demand-supply perspective. The results of the survey show that male, middle-aged, and middle-class farmers or farmers who plant local optimal crops are more likely to become the members of cooperatives. There is a huge gap between service supply and demand of farmers; cooperatives have a positive effect on reducing the degree of service demand. This effect is only significant when concerning sale, pest control, and mechanization. On the whole, there is a weak correlative relationship between the current service supply of cooperatives and the service demand of farmers in China.
Events Planning and Service Orientation: A Comprehensive Study of Efficiency in Trade Shows
Authors: Alberca Pilar , Parte Laura , Rodríguez Ainhoa
Published: August 2018

Trade show participation is expensive for exhibitors, and therefore developing tools and methodologies in order to assess the performance and efficiency of trade shows is an important issue. The aim of this study is to determine the efficiency of trade shows with a particular focus
on the service sector and the influence of business factors in the selection process of the trade show. The efficiency is estimated using audited data of exhibiting firms. Moreover, trade show efficiency in service-oriented shows is examined in detail, as is the influence of explanatory variables
related to the business and service orientation of trade shows. Based on the results, the study provides conclusions and managerial implications to inform policy prescriptions that will help exhibitors to design their preshow planning process. From a preshow stage policy, socioeconomic perspective
and events planning, the study highlights the importance of improving scale efficiency in the Spanish trade show sector.
Precision Light Curves from TESS Full-frame Images: A Different Imaging Approach
Authors: Oelkers Ryan J. , Stassun Keivan G.
Published: August 2018

The Transiting Exoplanet Survey Satellite (TESS) will observe ∼150 million stars brighter than

, with photometric precision from 60 ppm to 3%, enabling an array of exoplanet and stellar astrophysics investigations. While light curves will be provided for ∼400,000 targets observed at 2 minute cadence, observations of most stars will only be provided as full-frame images (FFIs) at 30 minute cadence. The TESS image scale of ∼21″/pix is highly susceptible to crowding, blending, and source confusion, and the highly spatially variable point-spread function (PSF) will challenge traditional techniques, such as aperture and Gaussian-kernel PSF photometry. We use official “End-to-End 6” TESS simulated FFIs to demonstrate a difference image analysis pipeline, using a δ-function kernel, that achieves the mission specification noise floor of 60 ppm hr−1/2. We show that the pipeline performance does not depend on position across the field, and only ∼2% of stars appear to exhibit residual systematics at the level of ∼5 ppt. We also demonstrate recoverability of planet transits, eclipsing binaries, and other variables. We provide the pipeline as an open-source tool at https://github.com/ryanoelkers/DIA in both IDL and PYTHON. We intend to extract light curves for all point sources in the TESS FFIs as soon as they become publicly available, and will provide the light curves through the Filtergraph data visualization service. An example data portal based on the simulated FFIs is available for inspection at https://filtergraph.com/tess_ffi.
HelioLinC: A Novel Approach to the Minor Planet Linking Problem
Authors: Holman Matthew J. , Payne Matthew J. , Blankley Paul , Janssen Ryan , Kuindersma Scott
Published: August 2018

We present HelioLinC, a novel approach to the minor planet linking problem. Our heliocentric transformation-and-propagation algorithm clusters tracklets at common epochs, allowing for the efficient identification of tracklets that represent the same minor planet. This algorithm scales as

with the number of tracklets N, a significant advance over standard methods, which scale as

. This overcomes one of the primary computational bottlenecks faced by current and future asteroid surveys. We apply our algorithm to the Minor Planet Center’s Isolated Tracklet File, establishing orbits for more than 200,000 new minor planets. A detailed analysis of the influence of false detections on the efficiency of our approach, along with an examination of detection biases, will be presented in future work.
CCD Measurements of Double and Multiple Stars at ASV and NAO Rozhen in 2016: Four Linear Solutions
Authors: Cvetković Zorica , Pavlović Rade , Boeva Svetlana
Published: August 2018

The results of classical CCD observations for 371 double or multiple stars (450 pairs) obtained at both, Serbian Astronomical Station on the mountain of Vidojevica (ASV) and Bulgarian National Astronomical Observatory at Rozhen (NAOR) are presented. At ASV the observations were performed with the 0.6 m telescope in the first half of 2016 during 11 nights, and with the newly mounted 1.4 m telescope in the second half of 2016 during 16 nights. At NAOR, the observations were performed with the 2 m telescope during four nights. In this paper, we present 477 measurements (position angle and angular separation) for these 450 pairs. Among them there are 41 pairs with published orbital or linear elements and residuals are given for them. Some pairs have measurements for several epochs. Our observed pairs have angular separations in the interval from 1.″60 to 190.″30, with a mean angular separation of 14.″87 and a median value of 4.″34. Two new pairs and linear elements for four pairs which are calculated for the first time are also presented.
SOFIA/HAWC+ Detection of a Gravitationally Lensed Starburst Galaxy at z = 1.03
Authors: Ma Jingzhe , Brown Arianna , Cooray Asantha , Nayyeri Hooshang , Messias Hugo , Timmons Nicholas , Staguhn Johannes , Temi Pasquale , Dowell C. Darren , Wardlow Julie , Fadda Dario , Kovacs Attila , Riechers Dominik , Oteo Ivan , Wilson Derek , Perez-Fournon Ismael
Published: August 2018

We present the detection at 89 μm (observed frame) of the Herschel-selected gravitationally lensed starburst galaxy HATLAS J1429-0028 (also known as G15v2.19) in 15 minutes with the High-resolution Airborne Wideband Camera-plus (HAWC+) onboard the Stratospheric Observatory for Infrared Astronomy (SOFIA). The spectacular lensing system consists of an edge-on foreground disk galaxy at z = 0.22 and a nearly complete Einstein ring of an intrinsic ultra-luminous infrared (IR) galaxy at z = 1.03. Is this high IR luminosity powered by pure star formation (SF) or also an active galactic nucleus (AGN)? Previous nebular line diagnostics indicate that it is star formation dominated. We perform a 27-band multiwavelength spectral energy distribution (SED) modeling including the new SOFIA/HAWC+ data to constrain the fractional AGN contribution to the total IR luminosity. The AGN fraction in the IR turns out to be negligible. In addition, J1429-0028 serves as a testbed for comparing SED results from different models/templates and SED codes (magphys, sed3fit, and cigale). We stress that star formation history is the dominant source of uncertainty in the derived stellar mass (as high as a factor of ∼10) even in the case of extensive photometric coverage. Furthermore, the detection of a source at z ∼ 1 with SOFIA/HAWC+ demonstrates the potential of utilizing this facility for distant galaxy studies including the decomposition of SF/AGN components, which cannot be accomplished with other current facilities.
M31 PAndromeda Cepheid Sample Observed in Four HST Bands
Authors: Kodric Mihael , Riffeser Arno , Seitz Stella , Hopp Ulrich , Snigula Jan , Goessl Claus , Koppenhoefer Johannes , Bender Ralf
Published: August 2018

Using the M31 PAndromeda Cepheid sample and the HST PHAT data, we obtain the largest Cepheid sample in M31 with HST data in four bands. For our analysis we consider three samples: a very homogeneous sample of Cepheids based on the PAndromeda data, the mean magnitude corrected PAndromeda sample and a sample complementing the PAndromeda sample with Cepheids from the literature. The latter results in the largest catalog with 522 fundamental mode (FM) Cepheids and 102 first overtone (FO) Cepheids with F160W and F110W data and 559 FM Cepheids and 111 FO Cepheids with F814W and F475W data. The obtained dispersion of the period–luminosity relations (PLRs) is very small (e.g., 0.138 mag in the F160W sample I PLR). We find no broken slope in the PLRs when analyzing our entire sample, but we do identify a subsample of Cepheids that causes the broken slope. However, this effect only shows when the number of this Cepheid type makes up a significant fraction of the total sample. We also analyze the sample selection effect on the Hubble constant.
“Super-deblended” Dust Emission in Galaxies. II. Far-IR to (Sub)millimeter Photometry and High-redshift Galaxy Candidates in the Full COSMOS Field
Authors: Jin Shuowen , Daddi Emanuele , Liu Daizhong , Smolčić Vernesa , Schinnerer Eva , Calabrò Antonello , Gu Qiusheng , Delhaize Jacinta , Delvecchio Ivan , Gao Yu , Salvato Mara , Puglisi Annagrazia , Dickinson Mark , Bertoldi Frank , Sargent Mark , Novak Mladen , Magdis Georgios , Aretxaga Itziar , Wilson Grant W. , Capak Peter
Published: August 2018

We present a “super-deblended” far-infrared (FIR) to (sub)millimeter photometric catalog in the Cosmic Evolution Survey (COSMOS), prepared with the method recently developed by Liu et al., with key adaptations. We obtain point-spread function fitting photometry at fixed prior positions including 88,008 galaxies detected in VLA 1.4, 3 GHz, and/or MIPS 24 μm images. By adding a specifically carved mass-selected sample (with an evolving stellar mass limit), a highly complete prior sample of 194,428 galaxies is achieved for deblending FIR/(sub)mm images. We performed “active” removal of nonrelevant priors at FIR/(sub)mm bands using spectral energy distribution fitting and redshift information. In order to cope with the shallower COSMOS data, we subtract from the maps the flux of faint nonfitted priors and explicitly account for the uncertainty of this step. The resulting photometry (including data from Spitzer, Herschel, SCUBA2, AzTEC, MAMBO, and NSF’s Karl G. Jansky Very Large Array at 3 and 1.4 GHz) displays well-behaved quasi-Gaussian uncertainties calibrated from Monte Carlo simulations and tailored to observables (crowding, residual maps). Comparison to ALMA photometry for hundreds of sources provides a remarkable validation of the technique. We detect 11,220 galaxies over the 100–1200 μm range extending to z
phot ∼ 7. We conservatively selected a sample of 85 z > 4 high-redshift candidates significantly detected in the FIR/(sub)mm, often with secure radio and/or Spitzer/IRAC counterparts. This provides a chance to investigate the first generation of vigorous starburst galaxies (SFRs ∼ 1000 M
⊙ yr−1). The photometric and value-added catalogs are publicly released.
A Systematic Analysis of Stellar Populations in the Host Galaxies of SDSS Type I QSOs
Authors: Jin Jun-Jie , Zhu Yi-Nan , Meng Xian-Min , Lei Feng-Jie , Wu Hong
Published: August 2018

We investigate the relationship between host galaxies’ stellar content and active galactic nuclei (AGNs) for optically selected QSOs with z < 0.5. There is a total of 82 QSOs that we select from the Sloan Digital Sky Survey. These 82 QSOs have both Wide-field Infrared Survey Explorer data and measurable stellar content. With the help of the stellar population synthesis code STARLIGHT, we determine the luminosity fractions of AGNs, stellar population ages, and star formation histories (SFHs) of host galaxies. We find that there is a correlation between the SFH and AGN properties, which suggests a possible delay from star formation to AGN. This probably indicates that the AGN activity correlates with the star formation activity, which consistent with a coevolution scheme for black hole and host galaxies.
The Opacity of the Intergalactic Medium Measured along Quasar Sightlines at z ∼ 6
Authors: Eilers Anna-Christina , Davies Frederick B. , Hennawi Joseph F.
Published: August 2018

We publicly release a new sample of 34 medium resolution quasar spectra at 5.77 ≤ z
em ≤ 6.54 observed with the Echellette Spectrograph and Imager on the Keck telescope. This quasar sample represents an ideal laboratory to study the intergalactic medium (IGM) during the end stages of the epoch of reionization, and constrain the timing and morphology of the phase transition. For a subset of 23 of our highest signal-to-noise ratio spectra (S/N > 7, per 10 km s−1 pixel), we present a new measurement of the Lyα forest opacity spanning the redshift range 4.8 ≲ z ≲ 6.3. We carefully eliminate spectral regions that could be causing biases in our measurements due to additional transmitted flux in the proximity zone of the quasars, or extra absorption caused by strong intervening absorption systems along the line of sight. We compare the observed evolution of the IGM opacity with redshift to predictions from a hydrodynamical simulation with uniform ultraviolet background (UVB) radiation, as well as two semi-numerical patchy reionization models, one with a fluctuating UVB and another with a fluctuating temperature field. Our measurements show a steep rise in opacity at z ≳ 5.0 and an increased scatter and thus support the picture of a spatially inhomogeneous reionization process, consistent with previous work. However, we measure significantly higher optical depths at 5.3 ≲ z ≲ 5.7 than previous studies, which reduces the contrast between the highest opacity Gunn–Peterson troughs and the average opacity trend of the IGM, which may relieve some of the previously noted tension between these measurements and reionization models.
Wobbling Galaxy Spin Axes in Dense Environments
Authors: Lee Jaehyun , Kim Suk , Jeong Hyunjin , Smith Rory , Choi Hoseung , Hwang Ho Seong , Joo Seok-Joo , Kim Hak-Sub , Lee Youngdae , Yi Sukyoung K.
Published: August 2018

The orientation of galaxy spin vectors within the large-scale structure has been considered an important test of our understanding of structure formation. We investigate the angular changes of galaxy spin vectors in clusters—denser environments than are normally focused upon—using hydrodynamic zoomed simulations of 17 clusters YZiCS and a set of complementary controlled simulations. The magnitude by which galaxies change their spin vector is found to be a function of their rotational support, with larger cumulative angular changes of spin vectors when they have initially lower V

θ
/σ. We find that both mergers and tidal perturbations can significantly swing spin vectors, with larger changes in spin vector for smaller pericenter distances. Strong tidal perturbations are also correlated with the changes in stellar mass and specific angular momentum of satellite galaxies. However, changes in spin vector can often result in a canceling out of previous changes. As a result, the integrated angular change is always much larger than the angular change measured at any instant. Also, overall, the majority of satellite galaxies do not undergo mergers or sufficiently strong tidal perturbation after infall into clusters, and thus they end up suffering little change to their spin vectors. Taken as a whole, these results suggest that any signatures of spin alignment from the large-scale structure will be preserved in the cluster environment for many gigayears.
Magnetic Flux Cancelation as the Buildup and Trigger Mechanism for CME-producing Eruptions in Two Small Active Regions
Authors: Sterling Alphonse C. , Moore Ronald L. , Panesar Navdeep K.
Published: August 2018

We follow two small, magnetically isolated coronal mass ejection (CME)-producing solar active regions (ARs) from the time of their emergence until several days later, when their core regions erupt to produce the CMEs. In both cases, magnetograms show: (a) following an initial period where the poles of the emerging regions separate from each other, the poles then reverse direction and start to retract inward; (b) during the retraction period, flux cancelation occurs along the main neutral line of the regions; (c) this cancelation builds the sheared core field/flux rope that eventually erupts to make the CME. In the two cases, respectively 30% and 50% of the maximum flux of the region cancels prior to the eruption. Recent studies indicate that solar coronal jets frequently result from small-scale filament eruptions, with those “minifilament” eruptions also being built up and triggered by cancelation of magnetic flux. Together, the small-AR eruptions here and the coronal jet results suggest that isolated bipolar regions tend to erupt when some threshold fraction, perhaps in the range of 50%, of the region's maximum flux has canceled. Our observed erupting filaments/flux ropes form at sites of flux cancelation, in agreement with previous observations. Thus, the recent finding that minifilaments that erupt to form jets also form via flux cancelation is further evidence that minifilaments are small-scale versions of the long-studied full-sized filaments.
Signature of Planetary Mergers on Stellar Spins
Authors: Qureshi Ahmed , Naoz Smadar , Shkolnik Evgenya L.
Published: August 2018

One of the predictions of high-eccentricity planetary migration is that many planets will end up plunging into their host stars. We investigate the consequence of planetary mergers on their stellar hosts’ spin period. Energy and angular momentum conservation indicate that planet consumption by a star will spin up the star. We find that our proof-of-concept calculations align with the observed bifurcation in the stellar spin-period in young clusters. For example, after a Sun-like star has eaten a Jupiter-mass planet it will spin up by ∼60% (i.e., spin period is reduced by ∼60%), causing an apparent gap in the stellar spin-period between stars that consumed a planet and those that did not. The spun-up star will later spin down due to magnetic braking, consistent with the disappearance of this bifurcation in clusters (≳300 Myr). The agreement between the calculations presented here and the observed spin-period color diagram of stars in young clusters provides circumstantial evidence that planetary accretion onto their host stars is a generic feature of planetary-system evolution.
NGC 7793 P9: An Ultraluminous X-Ray Source Evolved from a Canonical Black Hole X-Ray Binary
Authors: Hu Chin-Ping , Kong Albert K. H. , Ng C.-Y. , Li K. L.
Published: August 2018

Transient ultraluminous X-ray sources (ULXs) provide an important link bridging transient low-mass X-ray binaries and ULXs. Here we report the first discovery of both a canonical sub-Eddington outburst and an ultraluminous super-Eddington outburst from an unusual transient ULX, NGC 7793 P9, with a variability factor higher than 103. Its X-ray spectrum switches between the typical high/soft state and the steep power-law state during the canonical outburst. The inner radius of the accretion disk and the disk temperature–luminosity correlation suggest that P9 harbors a stellar-mass black hole (BH). At the beginning of the ultraluminous outburst, we observe a cool outer disk with a hard Comptonized spectrum, implying a transition to the ULX regime. When the luminosity increases to L ≳ 3 × 1039 erg s−1, P9 shows a significantly curved spectrum that can be described by either a slim disk or a strongly curved Comptonized corona. The phenomenological model suggests that the hot disk observed near the peak of the ultraluminous outburst is coincidentally consistent with the extension of the thermal track. Utilizing more physical Comptonized disk models, we suggest that the corona cools down and the apparent disk-like spectrum is dominated by soft Comptonization. The significant variability above 1 keV supports this two-component scenario. The spectral evolution can also be interpreted with the supercritical accretion model. All these indicate that a canonical BH X-ray binary can show properties of a ULX.
On the Orbital Properties of Millisecond Pulsar Binaries
Authors: Hui C. Y. , Wu Kinwah , Han Qin , Kong A. K. H. , Tam P. H. T.
Published: August 2018

We report a detailed analysis of the orbital properties of a binary millisecond pulsar (MSP) with a white dwarf (WD) companion. Positive correlations between the orbital period P
b and eccentricity ϵ are found in two classes of MSP binaries with a He WD and with a CO/ONeMg WD, though their trends are different. The distribution of P
b is not uniform. Deficiency of sources at P
b ∼ 35–50 days (Gap 1) have been mentioned in previous studies. On the other hand, another gap at P
b ∼ 2.5–4.5 days (Gap 2) is identified for the first time. Inspection of the relation between P
b and the companion masses M
c revealed the subpopulations of MSP binaries with a He WD separated by Gap 1, above which P
b is independent of M
c (horizontal branch) but below which P
b correlates strongly with M
c (lower branch). A distinctive horizontal branch and a lower branch separated by Gap 2 were identified for the MSP binaries with a CO/ONeMg WD at shorter P
b and higher M
c. Generally, M
c are higher in the horizontal branch than in the lower branch for the MSP binaries with a He WD. These properties can be explained in terms of a binary orbital evolution scenario in which the WD companion was ablated by a pulsar wind in the post-mass-transfer phase.