cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Working-Land Conservation Structures: Evidence on Program and Non-Program Participants
Creators: name: Lambert, Dayton M.
name: Schaible, Glenn D.
name: Johansson, Robert C.
name: Daberkow, Stan G.
name: Lambert, Dayton M.
name: Schaible, Glenn D.
name: Johansson, Robert C.
name: Daberkow, Stan G.
Publisher: name: Unknown
Year: 2006
Subjects: Environmental Economics and Policy

description: In recent years, the Federal government has placed more emphasis on working-land conservation programs. Farmers can be reimbursed for adopting certain conservation practices, such as the installation of in-field or perimeter conservation structures, to enhance water quality and soil productivity. In an effort to better understand the relationships between operator motivations, program incentives, and the environmental benefits of conservation programs, a multi-agency survey, the Conservation Effects Assessment Project-Agricultural Resources Management Survey (CEAP-ARMS), was conducted in 2004 across 16 states representing more than one-million farmers growing wheat. The nationally representative survey integrates Natural Resources Inventory (NRI) data on field-level physical characteristics, program information, farm-level costs of production, and farm household information. This objective of this paper is twofold. First, using the CEAP-ARMS, farm structure, household, and operator characteristics of farmers participating in one or more conservation programs are compared with farmers not participating in a conservation program. Second, an impact model is specified to test whether program participants allocated more acres to in-field or perimeter conservation structures than nonparticipants, holding other factors constant. Evidence suggests that program participants allocate more field acres to vegetative conservation structures than nonparticipants with in-field or perimeter conservation structures.
Cointegration and Causality Analysis of World Vegetable Oil and Crude Oil Prices
Creators: name: Yu, Tun-Hsiang (Edward)
name: Bessler, David A.
name: Fuller, Stephen W.
name: Yu, Tun-Hsiang (Edward)
name: Bessler, David A.
name: Fuller, Stephen W.
Publisher: name: Unknown
Year: 2006
Subjects: Resource /Energy Economics and Policy

description: Because of the recent soaring petroleum price and growing environmental concerns, biodiesel has become an important alternative fuel. Biodiesel is the mono alky esters made from a vegetable oil, such as soybean or rapeseed oil, or sometimes from animal fats. The escalation in world petroleum price has stimulated the demand for biodiesel, which consequently expanded the use of vegetable oils. This paper investigates the long-run interdependence between major edible oil prices and examines the dynamic relationship between vegetable and crude oil prices. The data consists of 378 weekly observations extending from the first week of January in 1999 to the fourth week of March in 2006. We apply time-series analytical mechanisms and directed acyclic graphs to four major traded edible oils prices, including soybean, sunflower, rapeseed and palm oils, along with one weighted average world crude oil price. Tentative results suggest one long-run cointegration relationship among those five oil prices. Also, the edible oil markets are well linked in contemporaneous time with the palm oil market initiating the new information; however, soybean oil price dominates the edible oil markets in the long run. The influence of crude oil price on edible oil prices is not significant over the study period.
Extended quasi-additivity of Tsallis entropies
Creators: name: Piasecki, Ryszard
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We consider statistically independent non-identical subsystems with different entropic indices q1 and q2. A relation between q1, q2 and q' (for the entire system) extends a power law for entropic index as a function of distance r. A few examples illustrate a role of the proposed constraint q' < min(q1, q2) for the Beck's concept of quasi-additivity.
description: to appear in Physica A
Economic Efficiency, Structure and Scale Economies in the U.S. Dairy Sector
Creators: name: Mosheim, Roberto
name: Lovell, C.A. Knox
name: Mosheim, Roberto
name: Lovell, C.A. Knox
Publisher: name: Unknown
Year: 2006
Subjects: Industrial Organization

description: This study uses a new dataset based on the 2000 Agricultural Resource Management Survey, the most recent national survey of dairy producers in the United States. A shadow cost function is employed to decompose and analyze economic efficiency and scale economies. The study details the development of the data employed in the analysis and focuses on the estimation of scale relationships across farms in different regions and of different sizes. Preliminary results point to important scale economies and suggest that surviving small farms are on average more economically efficient but can exploit scale economies to a much lesser degree than larger farms. The preferred specification of the cost function does not show a region of decreasing returns to scale.
Spectroscopic Survey of Hα Emission Line Stars Associated with Bright Rimmed Clouds
Creators: name: Hosoya, Kensuke
name: Itoh, Yoichi
name: Oasa, Yumiko
name: Gupta, Ranjan
name: Sen, Asoke Kumar
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The results of a spectroscopic survey of H alpha emission line stars associated with fourteen bright rimmed clouds are presented. Slit-less optical spectroscopy was carried out with the Inter University Centre for Astronomy and Astrophysics (IUCAA) 2m telescope and IUCAA Faint Object Spectrograph and Camera (IFOSC). H alpha emission line was detected from 173 objects. Among them 85 objects have a strong H alpha emission line with its equivalent width larger than 10 A. Those are classical T Tauri stars. 52 objects have a weak H alpha emission line with its equivalent width less than 10 A and do not show intrinsic near-infrared excess. Those are weak-line T Tauri stars. On the other hand, 36 objects have a weak H alpha emission line (<10 A), although they show intrinsic near-infrared excess. Such objects are not common in low-mass star forming regions. Those are misfits of the general concept on formation process of a low-mass star, in which it evolves from a classical T Tauri star to a weak-line T Tauri star. Those might be weak-line T Tauri stars with a flared disk in which gas is heated by ultraviolet radiation from a nearby early-type star. Alternatively, we propose pre-transitional disk objects as their evolutional stage.
Comparison of high-temperature compression and compression-compression fatigue behavior of magnesium alloys DieMag422 and AE42
Creators: name: Teschke, Mirko
name: Koch, Alexander
name: Walther, Frank
Publisher: name: Technische Universität Dortmund
Year: 2020
Subjects: subject: Magnesium
subject: Fatigue
subject: Compression
subject: Rare earth
subject: AE42
subject: DieMag422
subject: Tensile test
subject: Compression test
subject: Ratcheting
subject: High temperature
subject: 660
subject: Magnesium
subject: Materialermüdung
subject: Druckversuch
subject: Seltenerdmetall
subject: Magnesiumlegierung
subject: Zugversuch
subject: Ratcheting
subject: Hochtemperatur

description: Due to their high strength-to-weight-ratio, magnesium alloys are very attractive for use in automotive engineering. For application at elevated temperatures, the alloys must be creep-resistant. Therefore, the influence of the operating temperature on the material properties under quasistatic and cyclic load has to be understood. A previous study investigated tensile-tensile fatigue behavior of the magnesium alloys DieMag422 and AE42 at room temperature (RT). The aim of this study was the comparison of both alloys regarding compression, tensile, and compression-compression fatigue behavior. The quasistatic behavior was determined by means of tensile and compression tests, and the tensile-compression asymmetry was analyzed. In temperature increase fatigue tests (TIFT) and constant amplitude tests (CAT), the temperature influence on the cyclic creeping (ratcheting) behavior was investigated, and mechanisms-relevant test temperatures were determined. Furthermore, characteristic fracture mechanisms were evaluated with investigations of the microstructure and the fracture surfaces. The initial material was analyzed in computed tomographic scans and energy dispersive X-ray (EDX) analyses.
description: Materials;13(3)
Comments on the tethered galaxy problem
Creators: name: Clavering, William J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In a recent paper Davis et al. make the counter intuitive assertion that a galaxy held `tethered' at a fixed distance from our own could emit blueshifted light. Moreover, this effect may be derived from the simplest Friedmann-Robertson-Walker spacetimes and the (0.3,0.7) case which is believed to be a good late time model of our own universe. In this paper we recover the previous authors' results in a more transparent form. We show how their results rely on a choice of cosmological distance scale and revise the calculations in terms of observable quantities which are coordinate independent. By this method we see that, although such a tethering would reduce the redshift of a receding object, it would not do so sufficiently to cause the proposed blueshift. The effect is also demonstrated to be much smaller than conjectured below the largest intergalactic scales. We also discuss some important issues, raised by this scenario, relating to the interpretation of redshift and distance in relativistic cosmology.
description: 6 pages, 3 figures, submitted to Am.J.Phys
title: Nitroxoline
title: a potent antimicrobial agent against multidrug resistant Enterobacteriaceae
titleType: AlternativeTitle
Creators: name: Cherdtrakulkiat, Rungrot
name: Lawung, Ratana
name: Nabu, Sunanta
name: Tantimavanich, Srisurang
name: Sinthupoom, Nujarin
name: Prachayasittikul, Supaluk
name: Prachayasittikul, Virapong
Publisher: name: Technische Universität Dortmund
Year: 2019
Subjects: subject: Enterobacteriaceae
subject: Multidrug resistance
subject: Antimicrobial activity
subject: 8-hydroxyquinoline
subject: Nitroxoline
subject: 610

description: Antimicrobial resistance has become a prime global concern. An ability of the microbes to produce enzymes to destroy antimicrobial drugs is one of the well-known mechanisms underlying the resistance. 8-Hydroxyquinoline (8HQ) and derivatives were reported to exert diverse biological effects such as antimicrobial, antioxidant and an- tineurodegenerative activities. Herein, 8HQ (1), nitroxoline (NQ, 2) and 7-Br-8HQ (3) were investigated for antimicrobial activity against Enterobacteriaceae including extended spectrum β-lactamase (ESBL)-producing and carbapenemase-producing strains as well as the effect of metal ions .These compounds (1-3) displayed the great antimicrobial activity against fifty-eight bacterial isolates of Escherichia coli, Providencia rettgeri and Klebsiella pneumoniae, in which NQ (2) exerted the highest antimicrobial activity with a MIC50 of 42.04 ❍M (8 µg/mL) and MBC50 of 168.28 ❍M (32 µg/mL). The MIC values of NQ (2) and 7-Br-8HQ (3) were significantly increased in the presence of Cu2+ and Fe3+. This finding reveals that NQ could be an effective compound to be further developed as an antimicrobial agent for combating Enterobacteriaceae infections.
description: EXCLI Journal;Vol. 18. 2019
Hub location problem στην εφοδιαστική αλυσίδα ζυθοποιίας
Creators: name: Νικολακόπουλος, Γιώργος
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2019
Subjects: subject: Εμπειρική εφαρμογή
subject: Hub location problem
subject: Πρόβλημα xωροθέτησης
subject: Κλάδος ζυθοποιίας
subject: Κεντρικοί κόμβοι δικτύου

description: Ο ρόλος της Εφοδιαστικής Αλυσίδας σε έναν σύγχρονο οργανισμό έχει πλέον αναγνωριστεί, οριστεί και μελετηθεί από την επιστημονική κοινότητα σε μεγάλο βαθμό. Ωστόσο νέοι παράγοντες, όπως η γήρανση του πληθυσμού, η αστικοποίηση του, η αύξηση της διείσδυσης του ηλεκτρονικού εμπορίου κ.α. δημιουργούν νέες προκλήσεις. Ως εκ τούτου, στο κλασικό θέμα της τοποθεσίας των εγκαταστάσεων (Facility Location Problem) προστίθεται μια πιο εξειδικευμένη και σύγχρονη κατεύθυνση, αυτή της τοποθεσίας Hubs, γνωστή στην διεθνή βιβλιογραφία ως Hub Location Problem. Αναλυτικότερα, επιχειρώντας παράλληλα μια απλούστευση της εικόνας της Εφοδιαστικής Αλυσίδας, υπό το πρίσμα του προβλήματος Hub Location Problem, μπορεί να κατανοηθεί ως το σύνολο της κίνησης (ροές) του εμπορεύματος (Transportation) και της στάσης (κόμβοι) του (Warehousing). Το σύνολο των ροών και των κόμβων δημιουργούν ένα Δίκτυο. Το Δίκτυο αποτελεί ένα δυναμικό πλαίσιο, με την κίνηση των ροών από τον κόμβο προέλευσης στον κόμβο προορισμού, μέσω κεντρικών Hubs. Τα Hubs είναι εγκαταστάσεις που λειτουργούν ως σημεία σύνδεσης, ενοποίησης και επανατροφοδοσίας των ροών ενός δικτύου ανάμεσα σε καθορισμένους κόμβους προέλευσης και προορισμού. Σκοπός της εργασίας, στα πλαίσια της θεματικής ενότητας του Hub Location Problem, είναι η μελέτη ενός υπαρκτού και σύγχρονου Δικτύου, η εφαρμογή ενός ερευνητικού μοντέλου και η επίλυση του για την εξαγωγή συμπερασμάτων. Στο πλαίσιο αυτό υπήρξε συνεργασία με την Ολυμπιακή Ζυθοποιία Α.Ε. για την παροχή των απαραίτητων πληροφοριών σχετικά με το Δίκτυο Διανομής το οποίο διαθέτει. Το πρόγραμμα που χρησιμοποιήθηκε για την δόμηση και την επίλυση του προβλήματος είναι το Aimms, ένα λογισμικό περιβάλλον δόμησης και επίλυσης μοντέλων.
Magnetic asymmetry induced anomalous spin-orbit torque in IrMn
Creators: name: Zhou, Jing
name: Shu, Xinyu
name: Liu, Yaohua
name: Wang, Xiao
name: Lin, Weinan
name: Chen, Shaohai
name: Liu, Liang
name: Xie, Qidong
name: Hong, Tao
name: Yang, Ping
name: Yan, Bingbai
name: Han, Xiufeng
name: Chen, Jingsheng
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We demonstrate an anomalous spin-orbit torque induced by the broken magnetic symmetry in the antiferromagnet IrMn. We study the magnetic structure of three phases of IrMn thin films using neutron diffraction technique. The magnetic mirror symmetry M' is broken laterally in both L10-IrMn and L12-IrMn3 but not γ-IrMn3. We observe an out-of-plane damping-like spin-orbit torque in both L10-IrMn/permalloy and L12-IrMn3/permalloy bilayers but not in γ-IrMn3/permalloy. This is consistent with both the symmetry analysis on the effects of a broken M' on spin-orbit torque and the theoretical predictions of the spin Hall effect and the Rashba-Edelstein effect. In addition, the measured spin-orbit torque efficiencies are 0.61+-0.01, 1.01+-0.03 and 0.80+-0.01 for the L10, L12 and γ phases, respectively. Our work highlights the critical roles of the magnetic asymmetry in spin-orbit torque generation.
nuMSM--Predictions for Neutrinoless Double Beta Decay
Creators: name: Bezrukov, F.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We give the prediction on the effective Majorana mass for neutrinoless double $β$ decay in a simple extension of the Standard Model (nuMSM). The model adds three right-handed neutrinos with masses smaller than the electroweak scale, and explains dark matter of the Universe. This leads to constraints 1.3meV
description: 5 pages
SUGGESTED PROCEDURES FOR ESTIMATING FARM MACHINERY COSTS
Creators: name: Lazarus, William F.
name: Selley, Roger A.
name: Lazarus, William F.
name: Selley, Roger A.
Publisher: name: Unknown
Year: 2002
Subjects: Agricultural Finance
Farm Management

description: The North Central Farm Machinery Task Force is a group of extension economists who evaluated alternative methods for estimating farm machinery costs and made recommendations for the development of extension materials. This paper describes the procedures agreed upon, and explains the rationale for the procedures chosen. The focus is on "typical" machinery costs for use in extension budgets and other analyses and examples. This paper also provides detailed documentation of the methods used in recent versions of the widely used Minnesota Farm Machinery Economic Cost Estimates publication (referred to below as "the Minnesota fact sheet"), focusing mainly on the 2000 version.
Up-regulation of long non-coding RNA-PCAT-1 promotes invasion and metastasis in esophageal squamous cell carcinoma
Creators: name: Razavi, Maryam
name: Ghorbian, Saeid
Publisher: name: Technische Universität Dortmund
Year: 2019
Subjects: subject: LncRNA-PCAT-1
subject: esophageal squamous cell carcinoma
subject: ESCC
subject: lncRNA
subject: 610

description: Long non-coding RNA prostate cancer as sociated transcript-1 ncRNA (lncRNA-PCAT-1) plays an important role in the progression of prostate cancer. The present investigation was aimed to evaluate the potential roles of the lncRNA-PCAT-1 gene expression changes in esophageal squamous cell carcinoma (ESCC) between Iranian population. In the case-control investigation, we have anal yzed a total of 150 fresh tissue samples, compromising of 75 cancerous tissues and 75 adjacent normal tissues from patients with ESCC. We used quantitative Real-time polymerase chain reaction (qRT-PCR) to evaluate the lncRNA-PCAT-1 gene expression levels in ESCC patients and correlation between the lncRNA-PCAT-1 expression changes and clinical characteristics. Our findings showed that the lncRNA-PCAT-1 gene was up-regulated in cancerous tissues compared with the adjacent non-cancerous tissues (p=0.0016). In addition, the results revealed a significant correlation between up-regulating of lncRNA-PCAT-1 and hot liquid drinking (p =0.017). These findings offer the potential roles of lncRNA-PCAT-1 in the pathogenesis of ESCC and may consider as a candidate prognostic biomarker for ESCC in an Iranian population.
description: EXCLI Journal;Vol. 18 2019
Near-Infrared Transit Photometry of Extra-Solar Planet HAT-P-54b
Creators: name: Tabata, Haruka
name: Itoh, Yoichi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The results of near-infrared photometric observations of a transit event of an extrasolar planet HAT-P-54b are presented herein. Precise near-infrared photometry was carried out using the Nayuta 2 m telescope at Nishi-Harima Astronomical Observatory, Japan and Nishi-harima Infrared Camera (NIC). 170 J-, H-, and Ks-band images were taken in each band in 196 minutes. The flux of the planetary system was observed to decrease during the transit event. While the the Ks-band transit depth is similar to that in the r-band, the J- and H-band transits are deeper than those in the Ks-band. We constructed simple models of the planetary atmosphere and found that the observed transit depths are well reproduced by inflated atmosphere containing H2S molecule.
Association of rs4784227-CASC16 (LOC643714 locus) and rs4782447-ACSF3 polymorphisms and their association with breast cancer risk among Iranian population
Creators: name: Tajbakhsh, Amir
name: Farjami, Zahra
name: Darroudi, Sousan
name: Ayati, Seyed Hasan
name: Vakili, Fatemeh
name: Asghari, Mahla
name: Alimardani, Maliheh
name: Abedini, Soheila
name: Kushyar, Mohammad Mahdi
name: Pasdar, Alireza
Publisher: name: Technische Universität Dortmund
Year: 2019
Subjects: subject: Chromatin remodelling
subject: Carcinoma
subject: Genetic variation
subject: Epidemiology
subject: Enhancer element
subject: 610

description: TOX3 and FOXA1 proteins are believed to be involved in the susceptibility of breast cancer. rs4782447 and rs4784227, as single nucleotide polymorphisms (SNPs), located at the 16q may affect the FOXA1 DNA binding sequence change and therefore may enhance the FOXA1-binding affinity to the promoter of TOX3 gene. This study aimed to investigate the association of these SNPs/haplotypes with breast cancer susceptibility in Iranian population. We conducted a case-control study of 1072 blood samples (505 breast cancer patients and 567 controls). Genotyping of rs4784227 and rs4782447 SNPs was carried out by ARMS PCR. Moreover, statistical analysis was done by SPSS 20.0 (IBM Inc., Chicago, IL, USA) and SNP analyser 2.0. There was a strongly significant statistical association between alleles and genotypes of rs4784227 with breast cancer susceptibility in a group of Iranian women (p<0.05). Moreover, a significant association was demonstrated between TA haplotype and breast cancer risk (OR=0.78; 95% CI (0.62-0.96); P-value=0.025). In this respect, although we did not observe a statistically significant association between rs4782447 with breast cancer susceptibility, the combination of the alleles of rs4784227 and rs4782447 SNPs may also affect the risk. This is in line with other studies where they suggest these SNPs as risk-associated polymorphisms by which lead to disruption of as a distal enhancer, FOXA1, binding and following that change in TOX3 expression that can eventually affect the risk of breast cancer.
description: EXCLI Journal;Vol. 18 2019
Deoxynivalenol enhances IL-1ß expression in BV2 microglial cells through activation of the NF-κB pathway and the ASC/NLRP3 inflammasome
Creators: name: Molagoda, Ilandarage Menu Neelaka
name: Lee, Seunghun
name: Jayasooriya, Rajapaksha Gedara Prasad Tharanga
name: Jin, Cheng-Yung
name: Choi, Yung Hyun
name: Kim, Gi-Young
Publisher: name: Technische Universität Dortmund
Year: 2019
Subjects: subject: Deoxynivalenol
subject: IL-1 β
subject: Nuclear factor- κ B
subject: Inflammasome
subject: 610

description: Deoxynivalenol (DON) is one of the most common fungal toxins that contaminate food grains and cereal-derived products. However, it is unknown whether DON stimulates IL-1 β expression through the activation of the nuclear factor- κ B (NF- κ B) pathway and the ACS/NLRP3 inflammasome. In this study, we found that high concentrations of DON (above 800 nM) decreased relative cell viability; ho wever, no significant population of apoptotic sub-G 1 cells was observed. DON also upregulated IL-1 β expression from between 0.5 h and 6 h after treatment, and enhanced the nuclear localization of the NF- κ B subunits, p50 and p65. NF- κ B inhibitors, pyrrolidinedithiocarba- mate and PS1145, significantly suppressed the DON-induced IL-1 β expression, which indicated that DON in- creased IL-1 β expression through the activation of NF- κ B. In addition, marked secretion of IL-1 β protein occurred in the presence of DON at 24 h, and a caspase-1 inhibitor suppressed DON-mediated IL-1 β secretion, which sug- gested that caspase-1 indu ced the cleavage of pro-IL-1 β to lead the secretion of its active form. Thus, components of the inflammasome, such as ASC and NLRP3, significantly increased by DON treatment; in addition, the knock- down of ASC and NLRP3 markedly downregulated DON-induced IL-1 β secretion, but not IL-1 β gene expression, which indicated that DON promoted IL-1 β secretion through the ASC/NLRP3 inflammasome. Co llectively, the data suggested that DON induced IL-1 β expression in BV2 microglial cells through the activation of the NF- κ B signaling pathway and the subsequent upregulation of the ASC/NLRP3 inflammasome. Therefore, DON may in- duce inflammatory diseases or disorders by activating IL-1 β expression.
description: EXCLI Journal;Vol. 18 2019
title: Ιεραρχικά μοντέλα αξιοπιστίας εκτίμησης ασφαλίστρων
title: Premium estimation base on hierarchical credibility models
titleType: AlternativeTitle
Creators: name: Βλάμη, Σοφία-Μαρία
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2020
Subjects: subject: Ιεραρχικά μοντέλα
subject: Μπεϋζιανή στατιστική
subject: Αξιοπιστία χαρτοφυλακίου

description: Στα πλαίσια της παρούσας εργασίας λαμβάνει χώρα μία ανασκόπηση των ιεραρχικών μοντέλων αξιοπιστίας χαρτοφυλακίου κάνοντας χρήση μεθόδων Μπεϋζιανής και εμπειρικής Μπεϋζιανής. Παράλληλα, η έρευνα έχει επεκταθεί και σε πολυ-επίπεδα ιεραρχικά μοντέλα. Επιγραμματικά, αξίζει να αναφερθεί ότι το κυριότερο πλεονέκτημα των συγκεκριμένων μοντέλων είναι το γεγονός ότι επιτρέπουν την αναγνώριση του κινδύνου μέσα από μία σειρά διαδικασιών και σχηματισμών στοχεύοντας στον υπολογισμό του ασφαλίστρου. Στο τέλος της εργασίας, παρουσιάζονται ορισμένες ενδιαφέρουσες εφαρμογές των μοντέλων μέσω του στατιστικού πακέτου R
Pioneer's Anomaly and the Solar Quadrupole Moment
Creators: name: Quevedo, Hernando
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The trajectories of test particles moving in the gravitational field of a non-spherically symmetric mass distribution become affected by the presence of multipole moments. In the case of hyperbolic trajectories, the quadrupole moment of an oblate mass induces a displacement of the trajectory towards the mass source, an effect that can be interpreted as an additional acceleration directed towards the source. Although this additional acceleration is not constant, we perform a general relativistic analysis in order to evaluate the possibility of explaining Pioneer's anomalous acceleration by means of the observed Solar quadrupole moment, within the range of accuracy of the observed anomalous acceleration. We conclude that the Solar quadrupole moment generates an acceleration which is of the same order of magnitude of Pioneer's constant acceleration only at distances of a few astronomical units.
description: Typos corrected, references added
Bayesian Time-Resolved Spectroscopy of Multi-Pulsed GRBs: Variations of Emission Properties amongst Pulses
Creators: name: Li, Liang
name: Ryde, Felix
name: Pe'er, Asaf
name: Yu, Hoi-Fung
name: Acuner, Zeynep
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Gamma-ray bursts (GRBs) are highly variable and exhibit strong spectral evolution. In particular, the emission properties vary from pulse to pulse in multipulse bursts. Here we present a time-resolved Bayesian spectral analysis of a compilation of GRB pulses observed by the {\it Fermi}/Gamma-ray Burst Monitor. The pulses are selected to have at least four timebins with a high statistical significance, which ensures that the spectral fits are well determined and that spectral correlations can be established. The sample consists of 39 bursts, 117 pulses, and 1228 spectra. We confirm the general trend that pulses become softer over time, with mainly the low-energy power-law index $α$ becoming smaller. A few exceptions to this trend exist, with the hardest pulse occurring at late times. The first pulse in a burst is clearly different from the later pulses; three-fourths of them violate the synchrotron line of death, while around half of them significantly prefer photospheric emission. These fractions decrease for subsequent pulses. We also find that in two-thirds of the pulses, the spectral parameters ($α$ and peak energy) track the light-curve variations. This is a larger fraction compared to what is found in previous samples. In conclusion, emission compatible with the GRB photosphere is typically found close to the trigger time, while the chance of detecting synchrotron emission is greatest at late times. This allows for the coexistence of emission mechanisms at late times.
description: 112 pages, 17 figures including 318 panels, 46 tables. Published in ApJS on 2021 June 7. Data release at this Zenodo link ( [\href{https://zenodo.org/record/4746267}{this https URL}])
DECISION BASED ECONOMIC THEORY
Creators: name: Oskam, Arie J.
name: Oskam, Arie J.
Publisher: name: Unknown
Year: 1988
Subjects: Political Economy

description: Decision based economic theory stresses the central position of the objective function in the behavior of economic agents. Insufficient knowledge of objective functions hampers the development of economic theory. In this article, a methodology for deriving objective functions from conscious decisions has been developed. Three categories of decisions are concerned: positive, negative, and mutually exclusive decisions. Assuming minimal inconsistency, the objective function can be derived by means of linear or nonlinear programming and using a revealed preference approach. The method has been applied to derive the linear objective function of EC dairy policy. However, applications of this methodology for consumers and producers are similar. A number of issues related to the formulation and interpretation of the objective function are discussed.
Spike and slab variable selection: Frequentist and Bayesian strategies
Creators: name: Ishwaran, Hemant
name: Rao, J. Sunil
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62J07 (Primary) 62J05. (Secondary)

description: Variable selection in the linear regression model takes many apparent faces from both frequentist and Bayesian standpoints. In this paper we introduce a variable selection method referred to as a rescaled spike and slab model. We study the importance of prior hierarchical specifications and draw connections to frequentist generalized ridge regression estimation. Specifically, we study the usefulness of continuous bimodal priors to model hypervariance parameters, and the effect scaling has on the posterior mean through its relationship to penalization. Several model selection strategies, some frequentist and some Bayesian in nature, are developed and studied theoretically. We demonstrate the importance of selective shrinkage for effective variable selection in terms of risk misclassification, and show this is achieved using the posterior from a rescaled spike and slab model. We also show how to verify a procedure's ability to reduce model uncertainty in finite samples using a specialized forward selection strategy. Using this tool, we illustrate the effectiveness of rescaled spike and slab models in reducing model uncertainty.
description: Published at http://dx.doi.org/10.1214/009053604000001147 in the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Human-based dynamics of mental workload in complicated systems
Creators: name: Jafari, Mohammad-Javad
name: Zaeri, Farid
name: Jafari, Amir H.
name: Payandeh Najafabadi, Amir T.
name: Hassanzadeh-Rangi, Narmin
Publisher: name: Technische Universität Dortmund
Year: 2019
Subjects: subject: Mental workload
subject: Ergonomics
subject: Archetype
subject: Review
subject: System dynamics
subject: 610

description: As a dynamic system in which different factors affect human performance via dynamic interactions, mental workload needs a dynamic measure to monito r its factors and evidence in a complicated system, an approach that is lacking in the literature. The present study introduces a system dynamics-based model for designing feedback mechanisms related to the mental workload through literature review and content analysis of the previous studies. A human-based archetype of mental workload was detected from the data collection process. The archetype is presented at various stages, including dynamic theory, behavior over time, leverage points and model verification. The real validation of the dynamic model was confirmed in an urban train simulator. The dynamic model can be used to analyze the long-term behavior of the mental workload. Decision-makers can benefit from the developed archetypes in evaluating the dynamic impact of their decisions on accident prevention in the complicated systems.
description: EXCLI Journal;Vol. 18 2019
Spitzer IRAC Colors of Nebulae Associated with Star-Forming Regions
Creators: name: Itoh, Yoichi
name: Oasa, Yumiko
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Star-forming regions are often associated with nebulosity. In this study, we investigated infrared diffuse emission in Spitzer IRAC images. The infrared nebula L1527 traces outflows emanating from a low-mass protostar. The nebular color is consistent with the color of a stellar photosphere with large extinction. Nebulae around the HII region W5-East are bright in the infrared. These colors are consistent with the model color of dust containing polycyclic aromatic hydrocarbon (PAH). The strength of ultraviolet irradiation of the nebulae and the small dust fraction were deduced from the infrared colors of the nebulae. We found that the edges of the nebulae are irradiated by strong ultraviolet radiation and have abundant small dust. Dust at the surface of the molecular cloud is thought to be destroyed by ultraviolet radiation from an early-type star.
title: Ανάπτυξη εφαρμογής (e-Chartering) με χρήση ASP.NET core και entity framework για την ναυτιλιακή βιομηχανία
title: Development of shipping application (e-Chartering) using ASP.NET core and entity framework for shipping industry
titleType: AlternativeTitle
Creators: name: Παραδείσης, Νικόλαος
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2020
Subjects: subject: e-Chartering
subject: Shipping
subject: ASP.NET Core

description: Η παρούσα διπλωματική εργασία έχει ως στόχο την ανάπτυξη μιας διαδικτυακής πλατφόρμας ηλεκτρονικών ναυλώσεων για την εύρεση των κατάλληλων φορτίων και πλοίων, την αποστολή προσφορών και την ηλεκτρονική σύναψη ναυλοσυμφώνων. Πρόκειται για μια εφαρμογή στην οποία θα έχουν πρόσβαση πλοιοκτήτες δηλαδή οι κάτοχοι των πλοίων και οι ναυλωτές δηλαδή οι κάτοχοι των φορτίων. Μέσω της εφαρμογής οι χρήστες μπορούν να ανεβάσουν τα πλοία είτε τα φορτία τους και να εκδηλώσουν ενδιαφέρον για κάποιο πλοίο η φορτίο αντίστοιχα. Μπορούν ακόμα να καταγράψουν ναυλώσεις και να δουν χρήσιμα στατιστικά στοιχεία τα οποία βοηθούν στην επιλογή της πιο συμφέρουσας προσφοράς. Επίσης διατίθεται ένας μηχανισμός αξιολόγησης των πλοιοκτητών από τους ναυλωτές αφού έχει καταγραφεί μια ναύλωση. Οι πλοιοκτήτες αποκτούν βαθμολογία με βάση τις μεταφορικές τους υπηρεσίες και με βάση την αξιοπιστία τους. Αυτό διευκολύνει τους ναυλωτές στο να επιλέξουν τον πιο αξιόπιστο πλοιοκτήτη. Η εφαρμογή έχει τις βασικές προδιαγραφές που θα έπρεπε να έχει μια αντίστοιχη πλατφόρμα , αλλά χρειάζεται και άλλες βελτιώσεις και επεκτάσεις ώστε να μπορεί να χρησιμοποιηθεί από επιχειρήσεις. Η μεταπτυχιακή διατριβή αποτελείται από 4 κεφάλαια. Στο 1ο κεφάλαιο γίνεται μια περιγραφή των ειδών ναύλωσης, των εμπλεκόμενων μερών σε μια ναύλωση και το πώς γίνεται η διαδικασία διαπραγμάτευσης στην πραγματικότητα. Στο 2ο κεφάλαιο γίνεται μια περιγραφή των εφαρμογών που υπάρχουν σε όλους τους τομείς της ναυτιλίας και μετέπειτα στον τομέα των ναυλώσεων. Συγκεκριμένα αναφέρεται το σύστημα Vessel Bot. Στο 3ο κεφάλαιο γίνεται παρουσίαση της εφαρμογής με την χρήση εικόνων καθώς και των μελλοντικών επεκτάσεων. Στο 4ο κεφάλαιο επισημαίνεται η αρχιτεκτονική του συστήματος και γίνεται μια ανάλυση των τεχνολογιών και των γλωσσών προγραμματισμού που χρησιμοποιήθηκαν.
Model-independent Constraints on the Weak Phase $α$ (or $ϕ_2$) and QCD Penguin Pollution in $B \to ππ$ Decays
Creators: name: Xing, Zhi-zhong
name: Zhang, He
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present an {\it algebraic} isospin approach towards a more straightforward and model-independent determination of the weak phase $α$ (or $ϕ_2$) and QCD penguin pollution in $B\to ππ$ decays. The world averages of current experimental data allow us to impose some useful constraints on the isospin parameters of $B\to ππ$ transitions. We find that the magnitude of $α$ (or $ϕ_2$) extracted from the indirect CP violation in $π^+π^-$ mode is in agreement with the standard-model expectation from other indirect measurements, but its four-fold discrete ambiguity has to be resolved in the near future.
description: 11 pages, 3 figures, 2 tables
How large is the diffractive contribution to inclusive dijet photoproduction in UPCs at the LHC?
Creators: name: Guzey, V.
name: Klasen, M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Using next-to-leading order (NLO) perturbative QCD, we calculate the diffractive contribution to inclusive dijet photoproduction in Pb-Pb ultraperipheral collisions (UPCs) at the LHC and find that it does not exceed $5-10$% in small-$x_A$ bins in the ATLAS kinematics at $\sqrt{s_{NN}}=5.02$ TeV. Its smallness is a result of the restricted kinematics ($p_{T1} > 20$ GeV and $x_A > 0.001$), the large nuclear suppression of nuclear diffractive parton distribution functions predicted in the leading twist model of nuclear shadowing, and additional suppression due to QCD factorization breaking in diffraction. At the same time, using looser $p_T$ cuts, e.g., $p_{T1} > 10$ GeV and $p_{T i\neq 1} > 5-7$ GeV, we find that $(dσ_{\rm diff}/dx_A)/(dσ_{\rm inc}/dx_A)$ can reach $10-20$% at $x \approx 5 \times 10^{-4}$. Also, applying our framework to proton-proton UPCs at $\sqrt{s_{NN}}=13$ TeV, we find that the ratio of the diffractive and inclusive cross sections of dijet photoproduction $(dσ_{\rm diff}/dx_p)/(dσ_{\rm inc}/dx_p)$ is as large as $10-15$% for $x_p \sim 5 \times 10^{-4}$. An account of the contribution of Pomeron-Pomeron scattering, which is not included in our analysis, should make this ratio somewhat larger.
description: 14 pages, 2 figures, final revised version. Matches the published version, Phys. Rev. D 104, 114013 (2021)
Οι επιπτώσεις της ποσοτικής χαλάρωσης στις οικονομίες της Ευρωζώνης
Creators: name: Δημητρακοπούλου, Ευφροσύνη
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2020
Subjects: subject: Ποσοτική χαλάρωση
subject: Ευρωζώνη

description: Αντικείμενο της παρούσας διπλωματικής διατριβής είναι η ποσοτική χαλάρωση και πώς αυτή επιδρά στην πραγματική οικονομία στα πλαίσια της Ευρωζώνης. Αρχικά γίνεται αναφορά στην έννοια της ποσοτικής χαλάρωσης (Quantitative easing - QE) η οποία συνίσταται στην νομισματική πολιτική κατά την οποία μια Κεντρική Τράπεζα παράγει χρήματα με την αγορά χρεογράφων, όπως είναι τα κρατικά ομόλογα. Σκοπός του συγκεκριμένου προγράμματος είναι η αύξηση της κατανάλωσης του ιδιωτικού τομέα αλλά και η ελεγχόμενη αύξηση του πληθωρισμού όταν δεν καθίσταται αποτελεσματικό το μέτρο της μείωσης των επιτοκίων (τη στιγμή που πλησιάζει το μηδέν) με σκοπό την ανάπτυξη της οικονομίας. Κατ’ επέκταση αναλύεται η συμπεριφορά της Ευρωπαϊκής Κεντρικής Τράπεζας και πώς επιδρά η ποσοτική χαλάρωση στις χώρες της Ευρωζώνης αλλά και πώς επηρέασε η ανισότητα τη ζώνη του Ευρώ. Τα αποτελέσματα της οικονομετρικής ανάλυσης αφορούν 18 χώρες την Ευρωζώνης και καλύπτουν την περίοδο από το 2000 έως και το 2019 και εξετάστηκαν 18 μακροοικονομικές μεταβλητές με σκοπό να φανεί τι επίδραση είχε η ροή χρήματος του προγράμματος στον χρηματοπιστωτικό κλάδο και κατά πόσο δημιούργησε συνθήκες ανάπτυξης την περίοδο της ύφεσης.
National mini-public report: Italy
Creators: name: Francesca, Martina
name: Feisel, Franca
name: Cicchi, Lorenzo
Publisher: name: Zenodo
Year: 2024
Subjects: citizens' jury
mini-public
deliberative democracy
political trust
Covid-19 pandemic

description: This report provides an overview of the Italian mini-public on knowledge communication, disinformation, the role of experts, and trust in politics during the Covid-19 pandemic, which was held in the framework of the Horizon Europe research project REGROUP. The participants of the citizens’ jury shared their experiences related to these themes in times of the pandemic to ultimately formulate concrete policy recommendations to help the EU in preparing for future pandemics.

The report discusses (1) organisational matters, (2) provides a summary of the discussion contents, (3) presents the jurors’ policy recommendations, (4) analyses the attitudinal participant surveys, and includes (5) citizens’ feedback, and a (6) self-evaluation.
Statistics of Pressure Fluctuations in Decaying, Isotropic Turbulence
Creators: name: Kalelkar, Chirag
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Astrophysics (astro-ph)
subject: Chaotic Dynamics (nlin.CD)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We present results from a systematic direct-numerical simulation study of pressure fluctuations in an unforced, incompressible, homogeneous, and isotropic, three-dimensional turbulent fluid. At cascade completion, isosurfaces of low pressure are found to be organised as slender filaments, whereas the predominant isostructures appear sheet-like. We exhibit several new results, including plots of probability distributions of the spatial pressure-difference, the pressure-gradient norm, and the eigenvalues of the pressure-hessian tensor. Plots of the temporal evolution of the mean pressure-gradient norm, and the mean eigenvalues of the pressure-hessian tensor are also exhibited. We find the statistically preferred orientations between the eigenvectors of the pressure-hessian tensor, the pressure-gradient, the eigenvectors of the strain-rate tensor, the vorticity, and the velocity. Statistical properties of the non-local part of the pressure-hessian tensor are also exhibited, for the first time. We present numerical tests (in the viscous case) of some conjectures of Ohkitani [Phys. Fluids A {\bf 5}, 2570 (1993)] and Ohkitani and Kishiba [Phys. Fluids {\bf 7}, 411 (1995)] concerning the pressure-hessian and the strain-rate tensors, for the unforced, incompressible, three-dimensional Euler equations.
description: 10 pages, 29 figures, Accepted for publication in Physical Review E
Heteroleptic coordination environments in metal-mediated DNA G-quadruplexes
Creators: name: Punt, Philip M.
name: Stratmann, Lukas M.
name: Sevim, Sinem
name: Knauer, Lena
name: Strohmann, Carsten
name: Clever, Guido H.
Publisher: name: Technische Universität Dortmund
Year: 2020
Subjects: subject: Bioinorganic chemistry
subject: Coordination chemistry
subject: DNA
subject: G-quadruplex
subject: DNAzymes
subject: 540

description: The presence of metal centers with often highly conserved coordination environments is crucial for roughly half of all proteins, having structural, regulatory, or enzymatic function. To understand and mimic the function of metallo-enzymes, bioinorganic chemists pursue the challenge of synthesizing model compounds with well-defined, often heteroleptic metal sites. Recently, we reported the design of tailored homoleptic coordination environments for various transition metal cations based on unimolecular DNA G-quadruplex structures, templating the regioselective positioning of imidazole ligandosides LI. Here, we expand this modular system to more complex, heteroleptic coordination environments by combining LI with a new benzoate ligandoside LB within the same oligonucleotide. The modifications still allow the correct folding of parallel tetramolecular and antiparallel unimolecular G-quadruplexes. Interestingly, the incorporation of LB results in strong destabilization expressed in lower thermal denaturation temperatures Tm. While no transition metal cations could be bound by G-quadruplexes containing only LB, heteroleptic derivatives containing both LI and LB were found to complex CuII, NiII, and ZnII. Especially in case of CuII we found strong stabilizations of up to ΔTm = +34°C. The here shown system represents an important step toward the design of more complex coordination environments inside DNA scaffolds, promising to culminate in the preparation of functional metallo-DNAzymes.
description: Front. Chem.;8
Quantitative measures of entanglement in pair coherent states
Creators: name: Agarwal, G. S.
name: Biswas, Asoka
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The pair coherent states for a two-mode radiation field are known to belong to a family of states with non-Gaussian wave function. The nature of quantum entanglement between the two modes and some features of non-classicality are studied for such states. The existing criteria for inseparability are examined in the context of pair coherent states.
description: 11 pages, 5 figures, submitted
Ανάλυση κλάδου για εταιρικές επενδύσεις στις ελληνικές βιομηχανίες παραγωγής καπνικών προϊόντων
Creators: name: Παπουτσάνη, Χριστίνα
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2020
Subjects: subject: Αριθμοδείκτες
subject: ΣΕΚΑΠ
subject: Καρέλιας
subject: Παπαστράτος
subject: Καπνοβιομηχανίες

description: Ο κλάδος της καπνοβιομηχανίας στην Ελλάδα παρόλο που βιώνει καθημερινά πιέσεις από φορολογικές επιβαρύνσεις, από νομικές απαγορεύσεις, από καινοτομικά προϊόντα που τείνουν να υποκαταστήσουν τα παραδοσιακά τσιγάρα και λοιπά προϊόντα καπνού, συνεχίζει και επιβιώνει, να αναπτύσσεται και να εξελίσσεται. Αν και πλέον στη χώρα μας ο αριθμός των καπνοβιομηχανιών είναι σημαντικά μικρός, αυτές παρόλη την οικονομική κατάσταση εμφανίζουν ακόμα και σήμερα κέρδη, ενώ ταυτόχρονα ενισχύουν και την εξαγωγική τους δραστηριότητα. Στην παρούσα εργασία γίνεται εξέταση του κλάδου της καπνοβιομηχανίας στην Ελλαδική επικράτεια. Συγκεκριμένα, λαμβάνει χώρα λεπτομερής ανάλυση του παραγωγικού τομέα αλλά και γενικότερα της αγοράς, ενώ επίσης εστιάζει και στην χρηματοοικονομική ανάλυση των τριών μεγαλύτερων παραγωγικών εταιριών Καρέλιας, PMI-Παπαστράτος και ΣΕΚΑΠ. Η τελευταία γίνεται με σκοπό να προσδιορίσει σε ποια από τις τρεις εταιρίες θα ήταν αποδοτική μία επένδυση σε περίπτωση που κάποιος υποψήφιος επενδυτής ήθελε να επικεντρωθεί σε αυτόν τον κλάδο. Στη συγκεκριμένη εργασία δεν επιλέγεται αποκλειστικά μία εταιρία, απλά γίνονται προτάσεις βάσει δυνάμεων – αδυναμιών, ευκαιριών – απειλών για τις εταιρίες που υπερτερούν.
Distributed Lags and Demand Analysis for Agricultural and Other Commodities
Creators: name: Nerlove, Marc
name: Nerlove, Marc
Publisher: name: Unknown
Year: 1958
Subjects: Demand and Price Analysis
Research Methods/ Statistical Methods

description: Excerpts from the report Preface: This publication summarizes available literature on the use of distributed lags in the analysis of demand for individual commodities and contributes a substantial amount of new material to the problem of estimating dynamic demand relationships. Although distributed lags have been used in the analysis of some economic problems, they have been used to date only rarely in connection with demand analyses. These techniques are currently being used by the Agricultural Marketing Service in an analysis of the demand for textile products; results on this application will be reported in later publications. In this report considerable emphasis is placed on methodological aspects, in part to call attention to problem areas.