cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Spontaneous Formation of Outflows Powered by Rotating Magnetized Accretion Flows in a Galactic Center
Creators: name: Takasao, Shinsuke
name: Shuto, Yuri
name: Wada, Keiichi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We investigate how magnetically driven outflows are powered by a rotating, weakly magnetized accretion flow onto a supermassive black hole using axisymmetric magnetohydrodynamic simulations. Our proposed model focuses on the accretion dynamics on an intermediate scale between the Schwarzschild radius and the galactic scale, which is $\sim$1-100 pc. We demonstrate that a rotating disk formed on a parsec-scale acquires poloidal magnetic fields via accretion and this produces an asymmetric bipolar outflow at some point. The formation of the outflow was found to follow the growth of strongly magnetized regions around disk surfaces (magnetic bubbles). The bipolar outflow grew continuously inside the expanding bubbles. We theoretically derived the growth condition of magnetic bubbles for our model that corresponds to a necessary condition for outflow growth. We found that the north-south asymmetric structure of the bipolar outflow originates from the complex motions excited by accreting flows around the outer edge of the disk. The bipolar outflow comprises multiple mini-outflows and downflows (failed outflows). The mini-outflows emanate from the magnetic concentrations (magnetic patches). The magnetic patches exhibit inward drifting motions, thereby making the outflows unsteady. We demonstrate that the inward drift can be modeled using a simple magnetic patch model that considers magnetic angular momentum extraction. This study could be helpful for understanding how asymmetric and non-steady outflows with complex substructures are produced around supermassive black holes without the help of strong radiation from accretion disks or entrainment by radio jets such as molecular outflows in radio-quiet active galactic nuclei, NGC 1377.
description: single column, 36 pages, 16 figures, accepted for publication in the Astrophysical Journal
No-slip Billiards with Particles of Variable Mass Distribution
Creators: name: Ahmed, J.
name: Cox, C.
name: Wang, B.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Dynamical Systems (math.DS)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 37C83 (Primary) 70F35, 37E15 (Secondary)

description: Astute variations in the geometry of mathematical billiard tables have been and continue to be a source of understanding their wide range of dynamical behaviors, from regular to chaotic. Viewing standard specular billiards in the broader setting of no-slip (or rough) collisions, we show that an equally rich spectrum of dynamics can be called forth by varying the mass distribution of the colliding particle. We look at three two-parameter families of billiards varying both the geometry of the table and the particle, including as special cases examples of standard billiards demonstrating dynamics from integrable to chaotic, and show that markedly divergent dynamics may arise by changing only the mass distribution. Furthermore, for certain parameters billiards emerge which display unusual dynamics, including examples of full measure periodic billiards, conjectured to be nonexistent for the standard billiards in Euclidean domains.
Phase transitions in the logarithmic Maxwell O(3)-sigma model
Creators: name: Lima, F. C. E.
name: Almeida, C. A. S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate the presence of topological structures and multiple phase transitions in the O(3)-sigma model with the gauge field governed by Maxwell's term and subject to a so-called Gausson's self-dual potential. To carry out this study, it is numerically shown that this model supports topological solutions in 3-dimensional spacetime. In fact, to obtain the topological solutions, we assume a spherically symmetrical ansatz to find the solutions, as well as some physical behaviors of the vortex, as energy and magnetic field. It is presented a planar view of the magnetic field as an interesting configuration of a ring-like profile. To calculate the differential configurational complexity (DCC) of structures, the spatial energy density of the vortex is used. In fact, the DCC is important because it provides us with information about the possible phase transitions associated with the structures located in the Maxwell-Gausson model in 3D. Finally, we note from the DCC profile an infinite set of kink-like solutions associated with the parameter that controls the vacuum expectation value.
description: 16 pages, 7 figures. To appear in European Physics Journal C
ECONOMIC, SOCIAL, CULTURAL AND ENVIRONMENTAL EFFECTS ON TOURISM DEVELOPMENT OF PASINLER
Creators: name: Isik, Cem
name: Ada, Ali
name: Boztoprak, Ferhat
Publisher: name: tourismos
Year: 2021

description: The purpose of this study is to investigate the levels of the local people’s tourism perception, depending on the present tourism potential in Pasinler and Erzurum. Also to investigate the ideas and suggestions of people about the necessities for tourism with an innovational approach in the district. In accordance with this aim, the public survey applied to a total of 400 people in 2015. The results show that the developing tourism activities will be able to increase the cultural activities in the region, the plateau tourism potential and thermal tourism of the region that focused on and more tourist can be entertained by means of making suitable investments concluded as a result of the public surveys. In addition, the local people explained that tourism development can change the value and faith conformation of the people of the region have and can cause a negative effect on the customs as well. It means, that economic impacts of tourism (F=8.285 and p <0.05) and social impacts of tourism (F=9.762 and p <0.05) show differences depending on the participants' profession. It was also observed that the cultural impacts of tourism (F=5.759 and p <0.05) and environmental impacts of tourism (F=5.906 and p <0.05) show differences depending on the participants' profession.
description: tourismos, Vol. 11 No. 2 (2016)
Interactions of Young Binaries with Disks
Creators: name: Lubow, Stephen H.
name: Artymowicz, Pawel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The environment of a binary star system may contain two circumstellar disks, one orbiting each of the stars, and a circumbinary disk orbiting about the entire binary. The disk structure and evolution are modified by the presence of the binary. Resonances emit waves and open disk gaps. The binary's total mass and mass ratio as well as orbital elements can be modified by the disks. Signatures of these interactions provide observational tests of the dynamical models. The interaction of young planets with protoplanetary disks circularizes the orbits of Jupiter-mass planets and may produce much more massive extrasolar planets on eccentric orbits.
description: 25 pages, 5 figures, published in 2000
title: tourismos, Vol. 11 No. 2 (2016)
Creators: name: Tourismos
Publisher: name: University of the Aegean
Year: 2016

description: THE DEVELOPMENT OF ENRICHED MIXTURES OF CULTURAL TOURISM, FOR THE REPROMOTION OF GREEK MATURE DESTINATIONS...262-283 EDUCATING A NEW GENERATION OF TOUR GUIDES FOR THE FORTHCOMING ERA, AT THE ARISTOTLE UNIVERSITY OF THESSALONIKI...240-261 AN OVERVIEW OF RURAL TOURISM IN CROATIA AND SERBIA...225-239 DETERMINANTS OF TOURISM FLOWS TO GREECE: A GRAVITY MODEL APPROACH...202-224 A MULTI-PORT CRUISE REGION: DYNAMICS AND HIERARCHIES IN THE MED...168-201 PILGRIMAGE TOURIST’S PERCEPTION TOWARDS SERVICE QUALITY DIMENSIONS OF HOTELS IN KUMBAKONAM- THE TEMPLE CITY OF INDIA....168-201 WORSHIPING PILGRIMAGE AND RELIGIOUS TOURISM IN GREECE AND CYPRUS DURING ANCIENT TIMES...120-145 ECONOMIC, SOCIAL, CULTURAL AND ENVIRONMENTAL EFFECTS ON TOURISM DEVELOPMENT OF PASINLER...92-119 UNDERSTANDING THE ROLE OF SOCIODEMOGRAPHIC FACTORS AND VACATION MOTIVES IN VACATIONER’S DECISION MAKING PROCESS: A CASE OF LANGKAWI ISLAND...77-91 WE DO MORE THAN WE CAN TELL. PERSPECTIVES OF TACIT KNOWLEDGE TRANSFER IN TOURISM ACCOMMODATION ESTABLISHMENTS...50-76 DO CRISES IMPEDE THE INTERNATIONAL TOURISTS TRAVEL MOTIVATION...22-49 SOLIDARITY ECONOMY AS A COUNTERPOINT TO CLASSICAL ECONOMICS: POSSIBILITIES OF CHANGES...1-21 Initial Pages & Editorial...i-xvii
Period-Luminosity Relations for Type II Cepheids and their Application
Creators: name: Matsunaga, Noriyuki
name: Feast, Michael W.
name: Menzies, John W.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: JHKs magnitudes corrected to mean intensity are estimated for LMC type II Cepheids in the OGLE-III survey. Period-luminosity (PL) relations are derived in JHKs as well as in a reddening-free VI parameter. Within the uncertainties the BL Her stars (P < 4 d) and the W Vir stars (P = 4 to 20 d) are co-linear in these PL relations. The slopes of the infrared relations agree with those found previously for type II Cepheids in globular clusters within the uncertainties. Using the pulsation parallaxes of V553 Cen and SW Tau the data lead to an LMC modulus uncorrected for any metallicity effects of 18.46 +- 0.10 mag. The type II Cepheids in the second-parameter globular cluster, NGC 6441, show a PL(VI) relation of the same slope as that in the LMC and this leads to a cluster distance modulus of 15.46 +- 0.11 mag, confirming the hypothesis that the RR Lyrae variables in this cluster are overluminous for their metallicity. It is suggested that the Galactic variable kappa Pav is a member of the peculiar W Vir class found by the OGLE-III group in the LMC. Low-resolution spectra of OGLE-III type II Cepheids with P > 20 d (RV Tau stars) show that a high proportion have TiO bands; only one has been found showing C_2. The LMC RV Tau stars, as a group, are not co-linear with the shorter-period type II Cepheids in the infrared PL relations in marked contrast to such stars in globular clusters. Other differences between LMC, globular cluster and Galactic field type II Cepheids are noted in period distribution and infrared colours.
description: Accepted for publication in MNRAS, 11 pages (3 tables, 5 figures) + online material (5 pages, 1 table)
Will More Forage Pay? -- Economic Aspects of Using More Pasture and Forage on Farms – A Progress Report
Creators: name: Bureau Of Agricultural Economics
name: Bureau Of Agricultural Economics
Publisher: name: Unknown
Year: 1949
Subjects: Crop Production/Industries
Land Economics/Use
Livestock Production/Industries
Research and Development/Tech Change/Emerging Technologies
Resource /Energy Economics and Policy

description: Excerpts from the report: Much is being done to explore the possibilities of increasing industrial utilization of both the basic and the waste products of agriculture. Less spectacular yet of as great, if not greater, significance are the possibilities in increased utilization of farm products on the farm. Wherever it is feasible to substitute forage crops on acres now producing corn, cotton, or wheat and to utilize them profitably through livestock, opportunities exist for combating the threat of surplus production of these crops. Adjustments of this type also work toward improving the national diet, conserving soil resources, and lending greater stability to farm incomes. Those interested in either on-farm or off-farm utilization of farm products are faced with essentially these questions: (1) Is the proposed means of utilization technically feasible? (2) Will it pay the individual producer? and (3) Will it be to the advantage of the United States as a whole? The hypothesis upon which this study rests is that it is desirable to shift more of our land resources to production of forage if producers can find ways to utilize the forage efficiently and profitably. Three major assumptions are made: (1) That surpluses of cash crops such as cotton, wheat, and corn may again prevail and that profitable alternative uses for some of the land now producing such crops will be needed; (2) that increased production of livestock and livestock products would be desirable from the standpoint of dietary deficiencies and consumers' food preferences: and (3) that a shift to forage crops from the cash crops which may be in surplus will tend to retard erosion and help to maintain soil fertility.
Numerical Solution of Variable-Order Fractional Differential Equations Using Bernoulli Polynomials
Creators: name: Nemati, Somayeh
name: Lima, Pedro M.
name: Torres, Delfim F. M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 34A08, 65L60

description: We introduce a new numerical method, based on Bernoulli polynomials, for solving multiterm variable-order fractional differential equations. The variable-order fractional derivative was considered in the Caputo sense, while the Riemann--Liouville integral operator was used to give approximations for the unknown function and its variable-order derivatives. An operational matrix of variable-order fractional integration was introduced for the Bernoulli functions. By assuming that the solution of the problem is sufficiently smooth, we approximated a given order of its derivative using Bernoulli polynomials. Then, we used the introduced operational matrix to find some approximations for the unknown function and its derivatives. Using these approximations and some collocation points, the problem was reduced to the solution of a system of nonlinear algebraic equations. An error estimate is given for the approximate solution obtained by the proposed method. Finally, five illustrative examples were considered to demonstrate the applicability and high accuracy of the proposed technique, comparing our results with the ones obtained by existing methods in the literature and making clear the novelty of the work. The numerical results showed that the new method is efficient, giving high-accuracy approximate solutions even with a small number of basis functions and when the solution to the problem is not infinitely differentiable, providing better results and a smaller number of basis functions when compared to state-of-the-art methods.
description: Final form is published Open Access in 'Fractal Fract.' [https://doi.org/10.3390/fractalfract5040219]. Citation: S. Nemati, P.M. Lima and D.F.M. Torres, Numerical solution of variable-order fractional differential equations using Bernoulli polynomials, Fractal Fract. 5 (2021), no. 4, Art. 219, 16 pp
CIFRA National Survey: Uruguay May 2000
Creators: name: CIFRA, In Bogliaccini, Juan, And Queirolo Rosario Laboratorio De Opinión Pública And Redes Sociales En Uruguay Collection (Social Networks And Public Opinion Lab Collection)
Publisher: name: Roper Center for Public Opinion Research
Year: 2021

description: Total population: purchasing appliances and furniture; family economic situation; Uruguay economy; rate kindness of political figures; computer usage; Internet; credit card usage; approval of various political figures and groups; emergency law with economic measures; municipal government financial issues; car insurance; President Julio María Sanguinetti education reform; missing people during military regime; Expiry Law (law to dismiss missing people issue); 1999 voting history (November); old electoral system vs. new electoral system. Montevideo: where do you go when you need a doctor; mutualista (hospital plan) financial issues. National Agency for Research and Innovation (ANII) Collection.
ML-Surrogate Model
Creators: name: XYZ, ABC
Publisher: name: figshare
Year: 2025
Subjects: classificationCode: 400107
subject: Satellite, space vehicle and missile design and testing
classificationCode: 400601
subject: Antennas and propagation
classificationCode: 400606
subject: Satellite communications
classificationCode: 400608
subject: Wireless communication systems and technologies (incl. microwave and millimetrewave)
classificationCode: 401401
subject: Additive manufacturing
classificationCode: 460207
subject: Modelling and simulation
classificationCode: 461103
subject: Deep learning
classificationCode: 461104
subject: Neural networks

description: This repository contains attachments related to the publication:**[Design of a Metal 3D-Printed, Linearly Polarized Coaxial-to-Circular Waveguide Transition for High-Power Microwave Space Applications Using a Machine Learning Surrogate Model-Based Optimization Approach] ****Published in: ** [Engineering Applications of AI], [Volume xxx], [Issue yyy], [Year 2025], [Page Numbers zzz or DOI https://doi.org/10.1080/xxxyyyzzzz]## DescriptionThis repository provides access to additional resources that enhance or support the findings presented in the main publication. These materials may include,* **Datasets: ** The raw or processed datasets used for the analysis in the publication.* **Python Code: ** Scripts or software implementations used for data analysis.***Surrogate Model: ** Models generated## Contents1-Folder Dataset & Models ----------------------This folder has the Dataset and Trained Models1-Individial Feature importance Score-----------This folder has the Feature importance Score of variables data2-Reduced LHS-----------------------------------This folder have the Reduced LHS feature importance Score## How to UseThe files in this repository are organized. You can browse the contents and download individual files as needed.To access the main publication, please refer to: the publication's DOI link https://doi.org/10.1080/xxxyyyzzzz].## LicenseThis work is licensed under a Creative Commons Attribution 4.0 International License. To view a copy of this license, visit https://creativecommons.org/licenses/by/4.0/.## CitationIf you use the data or materials in this repository, please cite the original publication. And if you specifically use any of the attached files, you may also consider referencing the repository.## ContactFor any questions or inquiries regarding this repository or the publication, please contact:
**Last Updated:** April 02, 2025
Essays in the theory and application of duality in economics
Creators: name: Appelbaum, Eliezer
Publisher: name: University of British Columbia
Year: 2010

description: This thesis focusses on three areas in the theory and application of duality in economics. First, I integrate duality and dynamic optimization theories in the context of optimal economic growth. I demonstrate the possibility of control through prices and the equivalence of the centralized and decentralized solutions. To develop the dynamic duality relation I apply the duality between production possibilities sets and profit functions. An application is also given in the context of investment theory. Second, I develop, discuss and interpret tests for the static duality theory. Finally, I drop the perfect competition assumption and apply duality to the theory of a non-competitive firm. I investigate the extent to which the propositions in duality theory remain valid for non-competitive firms and provide a framework that permits the identification of different market structures. Within this framework I estimate the technology of a monopolistic industry and test for the price taking behaviour hypothesis.
Thermal recoil force, telemetry, and the Pioneer anomaly
Creators: name: Toth, Viktor T.
name: Turyshev, Slava G.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Space Physics (physics.space-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Precision navigation of spacecraft requires accurate knowledge of small forces, including the recoil force due to anisotropies of thermal radiation emitted by spacecraft systems. We develop a formalism to derive the thermal recoil force from the basic principles of radiative heat exchange and energy-momentum conservation. The thermal power emitted by the spacecraft can be computed from engineering data obtained from flight telemetry, which yields a practical approach to incorporate the thermal recoil force into precision spacecraft navigation. Alternatively, orbit determination can be used to estimate the contribution of the thermal recoil force. We apply this approach to the Pioneer anomaly using a simulated Pioneer 10 Doppler data set.
description: 10 pages, 3 figures. Published version
Identidades de papel. Identidad de la ausencia y negación de los migrantes indocumentados: un enfoque desde tres textos narrativos
Creators: name: Gianni, Silvia Maria
Publisher: name: Università degli  Studi di Milano
Year: 2014
Subjects: migración; identidad de la ausencia; narrativas de lo invisible; “sin papeles”; autoidentidad

description: Starting from the analysis of three narrative texts – the novels of Mexican author Alejandro Hernández, Amarás a Dios sobre todas las cosas (2013) [You shall love God above all things] and the Uruguayan writer Jorge Majfud, Crisis (2012), and thirdly the short story by Nicaraguan author Sergio Ramirez, Abbot y Costello (2013) [Abbot and Costello] – this study ventures into the realities of undocumented migrants who experience their identity in terms of “absence”, due to the lack of legal acknowledgment. The condition of being “paperless” places the migrant in a particular state that locates him in a classification where a general – negative and exclusive – idea prevails, and standardizes thousands and thousands of human beings based on their shortcomings, in a process of depersonalization.

     Absence becomes the official identity mark and configures the identity features of this segment of the population starting from its weakness, impotence and vulnerability, thereby making these aspects of frailty the constitutive feature of its identity. The “undocumented” create an self-identity rooted in negation from and of themselves, by making the image that the others have of them into their own image, and by getting caught in the game of making themselves invisible and being perceived as invisible.

     The discursive texts analysed here explore these spaces of absence and invisibility that surround the discourse of the “paperless” and their experiences. They also contribute to investigating and questioning – in a territory that has remained almost unexplored so far – the issue of the annihilated identity that hopes to be able to be and to exist one day.
description: Altre Modernità, 2014: NUMERO SPECIALE Migrazioni, diaspora, esilio nelle letterature e culture ispanoamericane
Statistical measurements of dispersion measure fluctuations of FRBs
Creators: name: Xu, Siyao
name: Weinberg, David H.
name: Zhang, Bing
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Extragalactic Fast Radio Bursts (FRBs) have large dispersion measures (DMs) and are unique probes of intergalactic electron density fluctuations. By using the recently released First CHIME/FRB Catalog, we reexamined the structure function (SF) of DM fluctuations. It shows a large DM fluctuation similar to that previously reported in Xu & Zhang (2020), but no clear correlation hinting towards large scale turbulence is reproduced with this larger sample. To suppress the distortion effect from FRB distances and their host DMs, we focus on a subset of CHIME catalog with DM $<500$ pc cm$^{-3}$. A trend of non-constant SF and non-zero correlation function (CF) at angular separations $θ$ less than $10^\circ$ is seen, but with large statistical uncertainties. The difference found between SF and that derived from CF at $θ\lesssim 10^\circ$ can be ascribed to the large statistical uncertainties or the density inhomogeneities on scales on the order of $100$ Mpc. The possible correlation of electron density fluctuations and inhomogeneities of density distribution should be tested when several thousands of FRBs are available.
description: 11 pages, 9 figures, accepted for publication in ApJL
Size Bias in Galaxy Surveys
Creators: name: Schmidt, Fabian
name: Rozo, Eduardo
name: Dodelson, Scott
name: Hui, Lam
name: Sheldon, Erin
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Only certain galaxies are included in surveys: those bright and large enough to be detectable as extended sources. Because gravitational lensing can make galaxies appear both brighter and larger, the presence of foreground inhomogeneities can scatter galaxies across not only magnitude cuts but also size cuts, changing the statistical properties of the resulting catalog. Here we explore this size bias, and how it combines with magnification bias to affect galaxy statistics. We demonstrate that photometric galaxy samples from current and upcoming surveys can be even more affected by size bias than by magnification bias.
description: 4 pages; 3 figures. Accepted for publication in Phys. Rev. Let.; v2: incorporating referee's comments; v3: updated acknowledgments
The Growth Rate of Supermassive Black Holes and Its Dependence on the Stellar Mass of Galaxies at the Present Epoch
Creators: name: Prokhorenko, Sergey
name: Sazonov, Sergey
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We study the distribution of accretion rates onto supermassive black holes (SMBH) in AGNs of the local Universe ($z<0.15$) based on near-infrared and hard X-ray surveys (2MASS and Swift/BAT). Using sufficiently accurate black hole mass estimates, we reliably estimated the Eddington ratio, $λ_{Edd}$, for approximately half of the objects in the AGN sample; for the remaining ones we used a rougher estimate based on the correlation of $M_{BH}$ with the galaxy stellar mass $M_\ast$. We found that for a wide range of galaxy masses, $9.280.01$) in the local Universe also depends weakly on $M_\ast$ and is 0.2-1%. These results confirm the trends found in previous studies for the earlier Universe and refine the parameters of the dependence $f(λ_{Edd}|M_\ast)$ at $z<0.15$. The revealed universal (weakly dependent on the galaxy stellar mass) pattern of the dependence $f(λ_{Edd})$ probably stems from the fact that, at present, the episodes of mass accretion onto SMBHs are associated mainly with stochastic processes in galactic nuclei rather than with global galaxy evolution processes.
description: 16 pages, 12 figures. Published in Astronomy Letters
Changes in American Farming
Creators: name: Johnson, Sherman E.
name: Johnson, Sherman E.
Publisher: name: Unknown
Year: 1949
Subjects: Agricultural and Food Policy
Crop Production/Industries
Land Economics/Use
Livestock Production/Industries
Research and Development/Tech Change/Emerging Technologies

description: Excerpts from the report: This study was undertaken in the belief that a first requisite for intelligent action on our peacetime production problems is an understanding of the nature and strength of the forces that have shaped the course of agricultural production in recent years. These forces will continue to influence production in the years to come. But new forces will be injected. Some of these are already on the horizon—the mechanical cotton picker is an example. Others cannot be foreseen. But constant change must be expected; and agriculture must adapt itself to changes that are inevitable and, for the most part, desirable. The revolutionary changes in farm production since World War I are not reversible. Policies developed for the present and for the prospective production situation, therefore, should reflect recent developments and those that can now be foreseen. They cannot be fashioned from the pattern that prevailed before the age of mechanical power and before other fundamental changes had taken place. The background data used for this analysis are largely the statistics contained in the crop and livestock reports and other production releases of the Bureau of Agricultural Economics.
GET ON THE BUS!
Creators: name: Brown, Cheryl
Publisher: name: tourismos
Year: 2009

description: In this article, the author conducted preliminary research on public transportation systems in four countries to aid in the development of a Comparative Public Administration course. The four countries (Canada, Mexico, the United Kingdom and South Africa) each offer unique challenges regarding mass transit. Increasing investment in mass public transit is vital to controlling urban pollution, reducing dependency on foreign oil, and reducing traffic congestion. Additionally, the article looks at the use of sabbaticals as a tool for researchers, both as a method for revitalizing professionals in the academic world and as a way to encourage research on subjects which may be less well-funded. The research will be incorporated into the course as an example of the kinds of research the students can do themselves, regardless of area of interest.
description: tourismos, Vol. 4 No. 1 (2009)
CIFRA National Survey: Uruguay December 2000
Creators: name: CIFRA, In Bogliaccini, Juan, And Queirolo Rosario Laboratorio De Opinión Pública And Redes Sociales En Uruguay Collection (Social Networks And Public Opinion Lab Collection)
Publisher: name: Roper Center for Public Opinion Research
Year: 2021

description: Last summer (1990-2000) vacation; vacation plans; economic situation of your family; economic situation of the country; future financial expectations; tourist season; likability of politicians and presidential candidates; university vs. finding a job; ideal career path; private vs. public universities; purchasing household appliances; men vs. women buying home items and necessities; approval of Parliament; approval of president Jorge Batlle; approval of Judicial Court; approval of district mayor; political spectrum position; past voting history. National Agency for Research and Innovation (ANII) Collection.
MOTIVATIONS OF YOUNG VOLUNTEERS IN SPECIAL EVENTS
Creators: name: Nassar, Nahla Ossama
name: Talaat, Nashwa Mohamed Talaat
Publisher: name: tourismos
Year: 2009

description: Volunteers are considered one of the main pillars of the special events. Motivations of volunteers have received a great attention from many organizations as they proved to be of a great value for human resources. Volunteering in special events bring different people together no matter what are their ethnics, origins, religion and economic standards. It also creates a sense of social harmony. The main issue of this research is to identify the motivations, needs and attitudes of young volunteers. Data gathered to examine these points from university students (n=500) that volunteered and those who did not volunteer in special events. The 12th version of the statistical tool (Statistical Package for Social Science) SPSS was used to execute data statistical analysis of the field study.
description: tourismos, Vol. 4 No. 1 (2009)
ML-Surrogate Model
Creators: name: HASAN, MUHAMMAD FAHAD
name: Huang, He
name: Mushtaq, Ray Tahir
Publisher: name: figshare
Year: 2025
Subjects: classificationCode: 400107
subject: Satellite, space vehicle and missile design and testing
classificationCode: 400601
subject: Antennas and propagation
classificationCode: 400606
subject: Satellite communications
classificationCode: 400608
subject: Wireless communication systems and technologies (incl. microwave and millimetrewave)
classificationCode: 401401
subject: Additive manufacturing
classificationCode: 460207
subject: Modelling and simulation
classificationCode: 461103
subject: Deep learning
classificationCode: 461104
subject: Neural networks

description: This repository contains attachments related to the publication:**[Design of a Metal 3D-Printed, Linearly Polarized Coaxial-to-Circular Waveguide Transition for High-Power Microwave Space Applications Using a Machine Learning Surrogate Model-Based Optimization Approach] ****Published in: ** [Engineering Applications of AI], [Volume xxx], [Issue yyy], [Year 2025], [Page Numbers zzz or DOI https://doi.org/10.1080/xxxyyyzzzz]## DescriptionThis repository provides access to additional resources that enhance or support the findings presented in the main publication. These materials may include,* **Datasets: ** The raw or processed datasets used for the analysis in the publication.* **Python Code: ** Scripts or software implementations used for data analysis.***Surrogate Model: ** Models generated## Contents1-Folder Dataset & Models ----------------------This folder has the Dataset and Trained Models1-Individial Feature importance Score-----------This folder has the Feature importance Score of variables data2-Reduced LHS-----------------------------------This folder have the Reduced LHS feature importance Score## How to UseThe files in this repository are organized. You can browse the contents and download individual files as needed.To access the main publication, please refer to: the publication's DOI link https://doi.org/10.1080/xxxyyyzzzz].## LicenseThis work is licensed under a Creative Commons Attribution 4.0 International License. To view a copy of this license, visit https://creativecommons.org/licenses/by/4.0/.## CitationIf you use the data or materials in this repository, please cite the original publication. And if you specifically use any of the attached files, you may also consider referencing the repository.## ContactFor any questions or inquiries regarding this repository or the publication, please contact:
**Last Updated:** April 02, 2025
The Hawaii Trails Project: Comet-Hunting in the Main Asteroid Belt
Creators: name: Hsieh, Henry H.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The mysterious solar system object 133P/(7968) Elst-Pizarro is dynamically asteroidal, yet displays recurrent comet-like dust emission. Two scenarios were hypothesized to explain this unusual behavior: (1) 133P is a classical comet from the outer solar system that has evolved onto a main-belt orbit, or (2) 133P is a dynamically ordinary main-belt asteroid on which subsurface ice has recently been exposed. If (1) is correct, the expected rarity of a dynamical transition onto an asteroidal orbit implies that 133P could be alone in the main belt. In contrast, if (2) is correct, other icy main-belt objects should exist and could also exhibit cometary activity. Believing 133P to be a dynamically ordinary, yet icy main-belt asteroid, I set out to test the primary prediction of the hypothesis: that 133P-like objects should be common and could be found by an appropriately designed observational survey. I conducted just such a survey -- the Hawaii Trails Project -- of selected main-belt asteroids in a search for objects displaying cometary activity. I made 657 observations of 599 asteroids, discovering one active object now known as 176P/LINEAR, leading to the identification of the new cometary class of main-belt comets. These results suggest that there could be ~100 currently active main-belt comets among low-inclination, kilometer-scale outer belt asteroids. Physically and statistically, main-belt comet activity is consistent with initiation by meter-sized impactors. The estimated rate of impacts and sizes of resulting active sites, however, imply that 133P-sized bodies should become significantly devolatilized over Gyr timescales, suggesting that 133P, and possibly the other MBCs as well, could be secondary, or even multigenerational, fragments from recent breakup events.
description: 32 pages, 11 figures, accepted for publication in A&A; supplementary data at http://star.pst.qub.ac.uk/~hhh/htptargs.dat and htptargs_readme.txt (to be uploaded to CADC upon publication)
A proposal for a coordinated effort for the determination of brainwide neuroanatomical connectivity in model organisms at a mesoscopic scale
Creators: name: Bohland, Jason W.
name: Wu, Caizhi
name: Barbas, Helen
name: Bokil, Hemant
name: Bota, Mihail
name: Breiter, Hans C.
name: Cline, Hollis T.
name: Doyle, John C.
name: Freed, Peter J.
name: Greenspan, Ralph J.
name: Haber, Suzanne N.
name: Hawrylycz, Michael
name: Herrera, Daniel G.
name: Hilgetag, Claus C.
name: Huang, Z. Josh
name: Jones, Allan
name: Jones, Edward G.
name: Karten, Harvey J.
name: Kleinfeld, David
name: Kotter, Rolf
name: Lester, Henry A.
name: Lin, John M.
name: Mensh, Brett D.
name: Mikula, Shawn
name: Panksepp, Jaak
name: Price, Joseph L.
name: Safdieh, Joseph
name: Saper, Clifford B.
name: Schiff, Nicholas D.
name: Schmahmann, Jeremy D.
name: Stillman, Bruce W.
name: Svoboda, Karel
name: Swanson, Larry W.
name: Toga, Arthur W.
name: Van Essen, David C.
name: Watson, James D.
name: Mitra, Partha P.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Biological sciences

description: In this era of complete genomes, our knowledge of neuroanatomical circuitry remains surprisingly sparse. Such knowledge is however critical both for basic and clinical research into brain function. Here we advocate for a concerted effort to fill this gap, through systematic, experimental mapping of neural circuits at a mesoscopic scale of resolution suitable for comprehensive, brain-wide coverage, using injections of tracers or viral vectors. We detail the scientific and medical rationale and briefly review existing knowledge and experimental techniques. We define a set of desiderata, including brain-wide coverage; validated and extensible experimental techniques suitable for standardization and automation; centralized, open access data repository; compatibility with existing resources, and tractability with current informatics technology. We discuss a hypothetical but tractable plan for mouse, additional efforts for the macaque, and technique development for human. We estimate that the mouse connectivity project could be completed within five years with a comparatively modest budget.
description: 41 pages
TOURISM TAXATION AND ENVIRONMENTAL QUALITY IN A MODEL WITH VERTICAL DIFFERENTIATION
Creators: name: Brida, Juan Gabriel
name: Pereyra, Juan
Publisher: name: tourismos
Year: 2009

description: The environmental quality of destination has become a tool that hotels have to hold the tourism demand. In this paper we are going to present a model of vertical differentiation in the accommodation industry, where differentiation is associated with quality. Additionally, we assume the existence of a lump sum tax in the accommodation industry. Two are the main results which will be proved in this article; first, if the tourist's willingness to pay for quality increases then both the demand and the price for tourism services increase as a result. However, the increment of the demand for best environmental quality gets higher, and therefore, the environmental quality level of tourism services, that the destination offers, decreases. Second, an increase in the value of the tourism tax leads to an increase in the total environmental quality of the destination.
description: tourismos, Vol. 4 No. 1 (2009)
STATE AND TOURISM PLANNING: A CASE STUDY OF CAMBODIA
Creators: name: Chheang, Vannarith
Publisher: name: tourismos
Year: 2009

description: State is a catalyst in tourism planning not just because of economic development and poverty reduction but also for national image and cultural identity. The paper examines the role of state in tourism development policies in post conflict Cambodia by discussing the talks/speeches made by Prime Minister Hun Sen in respect of tourism development policies in Cambodia. Twenty eight speeches were identified and analyzed under the framework of textual analysis and the discourse of power. Nine factor were determined in the context of tourism development: security and safety for tourists; infrastructure and tourism facilities development; stakeholders collaboration; cultural heritage preservation; environmental protection; human resources development; tourism products promotion; simplification of travel procedures; and regional cooperation.
description: tourismos, Vol. 4 No. 1 (2009)
An X-ray Bright Nucleus in the Low Surface Brightness Galaxy UGC 6614
Creators: name: Naik, Sachindra
name: Das, Mousumi
name: Jain, Chetana
name: Paul, Biswajit
Publisher: name: arXiv
Year: 2010
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report a study of the X-ray emission from the nuclear region of the low surface brightness (LSB) galaxy UGC 6614. Very little is known about the central objects in LSB galaxies especially their X-ray properties and X-ray spectra. In this study we have used XMM-Newton archival data to study the characteristics of the X-ray spectrum and the X-ray flux variability of the AGN in the LSB galaxy UGC 6614. The nucleus of UGC 6614 is very bright in X-ray emission with an absorption corrected 0.2-10.0 keV luminosity of ~1.1 x 10^{42} erg s^{-1}. The X-ray spectrum is found to be power-law type with a moderate column density. A short time scale of intensity variation and large X-ray flux is indicative of the presence of a black hole at the centre of this galaxy. Using the method of excess variance, we have determined the black hole mass to be ~0.12 x 10^{6} solar mass. The X-ray spectral properties are similar to that of the Seyfert I type AGNs. Our study thus demonstrates that although LSB galaxies are poor in star formation, they may harbour AGNs with X-ray properties comparable to that seen in more luminous spiral galaxies.
description: 5 pages, 4 figures, Accepted for publication in MNRAS
TOURISM AS A STIMULUS FOR SUSTAINABLE DEVELOPMENT IN RURAL AREAS: A CYPRIOT PERSPECTIVE
Creators: name: Gronau, Werner
name: Kaufmann, Rudi
Publisher: name: tourismos
Year: 2009

description: Since the mid 90ies the debate of how to achieve the objective of sustainability in the tourism sector is en vogue. Often weakly illuminated, however, is the interesting question as to whether the underlying framework conditions of the tourism industry are consistent with the concept of sustainability. This paper aims on contributing to the dialogue with a new interdisciplinary perspective. Rather than putting the emphasis on the question of whether the tourism industry can be sustainable or how sustainable it can be, the perspective of this paper focuses on whether tourism can support sustainable development. This, so far neglected shift in perspective, opens up a completely new field of academic discussion due to its remodelling of the interrelationship between sustainability and tourism industry. Therefore, in a first step, the possible influences of the tourism industry towards supporting sustainable development will be discussed. In a second step, the results of a qualitative study performed by the authors in the context of the Cypriot Agro Tourism will be presented, in order to empirically elicit existing influences of tourism on sustainable development in the rural areas of Cyprus. Especially, the case study illuminates the consequences of an efficient interplay between strategic and operational decision makers, hence, addressing both, macro and micro issues. The paper concludes, that, in synthesis with local heritage, entrepreneurship and location branding, this innovative form of tourism can provide a significant contribution to the economic, social and environmental components of sustainability and can be regarded as a best practice example.
description: tourismos, Vol. 4 No. 1 (2009)
Lensing Bias in Cosmic Shear
Creators: name: Schmidt, Fabian
name: Rozo, Eduardo
name: Dodelson, Scott
name: Hui, Lam
name: Sheldon, Erin
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Only galaxies bright enough and large enough to be unambiguously identified and measured are included in galaxy surveys used to estimate cosmic shear. We demonstrate that because gravitational lensing can scatter galaxies across the brightness and size thresholds, cosmic shear experiments suffer from lensing bias. We calculate the effect on the shear power spectrum and show that - unless corrected for - it will lead analysts to cosmological parameters estimates that are biased at the 2-3σlevel in DETF Stage III experiments, such as the Dark Energy Survey.
description: 14 pages; 4 figures (this version). Accepted for publication in ApJ. v2: incorporating referee's comments; v3: updated acknowledgments
THE IMPORTANCE OF STRATEGIC STAKEHOLDER MANAGEMENT IN TOURISM SECTOR: RESEARCH ON PROBABLE APPLICATIONS
Creators: name: Yilmaz, Burcu Selin
name: Gunel, Ozgur Devrim
Publisher: name: tourismos
Year: 2009

description: The main object of this study is to explain the importance of strategic stakeholder management in tourism sector. In today’s turbulent and chaotic business environment all businesses have to operate under the pressure of different interests and influences which management has to assess and evaluate to adjust them with corporate objectives. Therefore strategic stakeholder management practices could be considered as useful tools in dealing with the stakeholder interests in order to achieve corporate objectives. In making important corporate decisions, it is necessary to know about expectations and impacts of different stakeholders. In this study by examining former studies, the importance of the concept of stakeholder for organizations, the reasons why organizations should respond to their stakeholders and the need for managing stakeholders strategically, its importance and practices in tourism sector are demonstrated. In addition, the tourism sector managers’ opinions and attitudes towards strategic stakeholder management are examined by interviews with managers of some tourism enterprises in Izmir.
description: tourismos, Vol. 4 No. 1 (2009)
Blow-up of solution of an initial boundary value problem for a generalized Camassa-Holm equation
Creators: name: Zhou, Jiangbo
name: Tian, Lixin
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 35G25; 35G30; 35L05

description: In this paper, we study an initial boundary value problem for a generalized Camassa-Holm equation. We establish local well-posedness of this closed-loop system by using Kato theorem for abstract quasilinear evolution equation of hyperbolic type. Then, by using multiplier technique, we obtain a conservation law which enable us to present a blow-up result.
description: 14 pages
Domestic Tourism in Iran
Creators: name: Sheykhi, Mohammad Taghi
Publisher: name: tourismos
Year: 2009

description: The present paper explores and assesses various dimensions of tourist activities, multiple meanings and uses of tourisms in Iran. The country being endowed with numerous historical and cultural attractions, heritages and sites, many Iranians, are interested to visit them. In this way, domestic tourism is improving more than ever before. In addition to other objectives, domestic tourism contributes to the integration within different communities in the country. Therefore, native people are drawn to a variety of national and local attractions such as historical regions, natural landscapes, museums, religious shrines etc. However, the government has been highly insistent in developing state schemes aiming at the expansion of tourism in the country in the past few years. Under the impact of industrialization, per capita income has increased, and thereby the people have started opting, more leisure, travel and tour.
description: tourismos, Vol. 4 No. 1 (2009)