cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Internal jugular vein aneurysm
Creators: name: SATOR, HICHAM
Publisher: name: EURORAD
Year: 2016
Subjects: subject: Veins / Vena cava
subject: CT-Angiography
subject: Computer Applications-3D
subject: Contrast agent-intravenous
subject: Aneurysms

description: Clinical History Image Findings Discussion Find Diagnosis Differential Diagnosis
description: female, 47 years
description: Clinical History: A 47-year-old lady was referred for CT evaluation of an asymptomatic mass in the left upper neck, as an initial ultrasound examination had revealed no abnormality. On physical examination a fluctuating mass was seen, which promptly disappeared on compress... Final Diagnosis: Internal jugular vein aneurysm
title: A Quantitative Approach to the Development of Ecological Sites and State-and-Transition Models
Creators: name: Van Scoyoc, Matthew W.
Publisher: name: Utah State University
Year: 2014

description: The interaction of land-use and climate can cause non-linear “state” changes in ecosystems, characterized by persistent differences in structure and function. Changes in land-use and climate on the Colorado Plateau may be driving many ecosystems toward undesired states where energy-intensive measures are required to return to previous states. Landscape classification systems based on “ecological potential” offer a robust framework to evaluate ecological conditions. Ecological sites are a popular landscape classification system based on long-term ecological potential and are widely used throughout the western US. Ecological sites have been described extensively for rangelands and woodlands on DOI Bureau of Land Management lands; however, they have yet to be described on USDA Forest Service (USFS) lands. In this thesis, I describe a statistical approach to ecological site delineation and the development of state-and-transition models, diagrams that illustrate ecosystem dynamics and responses to disturbances. In Chapter 2, I used a large inventory dataset and multivariate statistical procedures to classify plots based on life zone, soils, and potential vegetation, effectively delineating statistical ecological site-like groups. Most of the statistical ecological sites matched ecological sites already described by the USDA Natural Resources Conservation Service (NRCS). Additionally, I described one new ecological site that has not been described by the NRCS in the Colorado Plateau region. In Chapter 3, I examined empirical evidence for alternative states in mountain ponderosa pine (Pinus ponderosa Lawson & C. Lawson) and upland piñon-juniper ecosystems. Using multivariate statistical procedures, I found that plots cluster into groups consistent with generalized alternative states identified in a priori conceptual models. Additionally, I showed that ponderosa pine clusters were true alternative states and piñon-juniper clusters were not true alternative states because they were confounded by similarities in climate. Ponderosa pine clusters were differentiated by overstory ponderosa pine density and corresponded to three states: current potential, high fuel load, and reduced overstory. These results illustrate the range of ecosystem variability that is present throughout the study area and present evidence for alternatives states caused by historical land-use. This project is the first to propose ecological sites and state-and-transition models on USFS lands in this region. These techniques could be applied to areas that do not have formally described ecological sites and state-and-transition models and could help identify ecological sites that may have been overlooked using other means of delineation. Additionally, these methods can be used to evaluate the range of ecological variability throughout an area of interest and to improved understanding of ecosystem dynamics.
title: Nutrients and Phytoplankton in Hyrum Lake
Creators: name: Murray, Robert Bruce
Publisher: name: Utah State University
Year: 1972

description: The current investigation indicates that the routine appearance of a noxious blue-green algal bloom of Aphanizomenon flos-aquae, in Hyrum Lake, a reservoir in northern Utah is a result of excess phosphorus. Data indicate that the algal growth is initiated by phosphorus liberated from the phosphorus rich bottom sediments, and at a time when nitrogen is present in excess in the lake relative to phosphorus.
Results indicate that the Little Bear River is the major source of nitrogen and phosphorus contributing to the eutrophication of Hyrum Lake. Nitrogen and phosphorus fluctuations in the Little Bear River proved to be concurrent with nitrogen and phosphorus fluctuations in the reservoir.
Symptomatic colloid cyst
Creators: name: Heinze, Andreas C.M.
Publisher: name: EURORAD
Year: 2016
Subjects: subject: Neuroradiology brain
subject: CT
subject: MR
subject: Diagnostic procedure
subject: Acute

description: Clinical History Image Findings Discussion Find Diagnosis Differential Diagnosis
description: male, 56 years
description: Clinical History: A 56 years old man consults his General Practitioner with a history of increased feeling of cranial pressure and headache for two days. The patient is sent to the local Casualty Department. In clinical examination nothing abnormal is detected. All laborat... Final Diagnosis: Colloid Cyst
MeerKAT caught a Mini Mouse: serendipitous detection of a young radio pulsar escaping its birth sit
Creators: name: Motta, S. E.
name: Turner, J. D.
name: Stappers, B.
name: Fender, R. P.
name: Heywood, I.
name: Kramer, M.
name: Barr, E. D.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: In MeerKAT observations pointed at a Galactic X-ray binary located on the Galactic plane we serendipitously discovered a radio nebula with cometary-like morphology. The feature, which we named `the Mini Mouse' based on its similarity with the previously discovered `Mouse' nebula, points back towards the previously unidentified candidate supernova remnant G45.24$+$0.18. We observed the location of the Mini Mouse with MeerKAT in two different observations, and we localised with arcsecond precision the 138 ms radio pulsar PSR J1914+1054g, recently discovered by the FAST telescope, to a position consistent with the head of the nebula. We confirm a dispersion measure of about 418 pc cm$^{-3}$ corresponding to a distance between 7.8 and 8.8 kpc based on models of the electron distribution. Using our accurate localisation and 2 period measurements spaced 90 days apart we calculate a period derivative of (2.7 $\pm$ 0.3) $\times$ 10 $^{-14}$ s s$^{-1}$. We derive a characteristic age of approximately 82 kyr and a spin down luminosity of 4$\times$10$^{35}$ erg s$^{-1}$, respectively. For a pulsar age comparable with the characteristic age, we find that the projected velocity of the neutron star is between 320 and 360 km/s if it was born at the location of the supernova remnant. The size of the proposed remnant appears small if compared with the pulsar characteristic age, however the relatively high density of the environment near the Galactic plane could explain a suppressed expansion rate and thus a smaller remnant.
description: 8 pages, 4 figures, accepted for publication on MNRAS
Explanation of the activity sensitivity of Mn I 5394.7 Å
Creators: name: Vitas, N.
name: Viticchiè, B.
name: Rutten, R. J.
name: Vögler, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: There is a long-standing controversy concerning the reason why the Mn I 5394.7 A line in the solar irradiance spectrum brightens more at larger activity than most other photospheric lines. The claim that this activity sensitivity is caused by spectral interlocking to chromospheric emission in Mg II h & k is disputed. Classical one-dimensional modeling is used for demonstration; modern three-dimensional MHD simulation for verification and analysis. The Mn I 5394.7 A line thanks its unusual sensitivity to solar activity to its hyperfine structure. This overrides the thermal and granular Doppler smearing through which the other, narrower, photospheric lines lose such sensitivity. We take the nearby Fe I 5395.2 A line as example of the latter and analyze the formation of both lines in detail to demonstrate and explain granular Doppler brightening. We show that this affects all narrow lines. Neither the chromosphere nor Mg II h & k play a role, nor is it correct to describe the activity sensitivity of Mn I 5394.7 A through plage models with outward increasing temperature contrast. The Mn I 5394.7 A line represents a proxy diagnostic of strong-field magnetic concentrations in the deep solar photosphere comparable to the G band and the blue wing of H-alpha, but not a better one than these. The Mn I lines are more promising as diagnostic of weak fields in high-resolution Stokes polarimetry.
description: 12 pages, 8 figures, accepted by A&A
Deterministic and universal quantum squeezing gate in virtue of teleportation-like protocol
Creators: name: Sun, Xiaocong
name: Wang, Yajun
name: Tian, Yuhang
name: Wang, Qingwei
name: Tian, Long
name: Zheng, Yaohui
name: Peng, Kunchi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Squeezing transformation as an essential component, gives rise to the possibility to perform various tasks of quantum information processing. However, the reported squeezing gate with best performance so far is a conditional realization at the expense of low success probability, while the performance of the deterministic ones is currently circumscribed by the limited squeezing degree of the non-classical ancilla. To address this issue, we develop and demonstrate a new scheme of deterministic and universal quantum squeezing gate with the property of non-local operation attributed to the teleportation-like protocol. We demonstrate high fidelity squeezing operation, even when the level of target squeezing being up to 10 dB, where a squeezed state with non-classical noise reduction of 6.5 dB is directly observed. Moreover, we perform a high-fidelity complex operation including a Fourier transformation and a phase squeezing gate, exploring the potential of implementing the complex task of quantum information processing with the presented functional unit. Our method can be applied to distributed quantum processor, the creation of exotic non-classical states, and quantum error correction.
description: 10 pages, 4 figures, artical
Weighted Radon transforms of vector fields, with applications to magnetoacoustoelectric tomography
Creators: name: Kunyansky, L.
name: McDugald, E.
name: Shearer, B.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 44A12, 92C55, 65R32

description: Currently, theory of ray transforms of vector and tensor fields is well developed, but the Radon transforms of such fields have not been fully analyzed. We thus consider linearly weighted and unweighted longitudinal and transversal Radon transforms of vector fields. As usual, we use the standard Helmholtz decomposition of smooth and fast decreasing vector fields over the whole space. We show that such a decomposition produces potential and solenoidal components decreasing at infinity fast enough to guarantee the existence of the unweighted longitudinal and transversal Radon transforms of these components. It is known that reconstruction of an arbitrary vector field from only longitudinal or only transversal transforms is impossible. However, for the cases when both linearly weighted and unweighted transforms of either one of the types are known, we derive explicit inversion formulas for the full reconstruction of the field. Our interest in the inversion of such transforms stems from a certain inverse problem arising in magnetoacoustoelectric tomography (MAET). The connection between the weighted Radon transforms and MAET is exhibited in the paper. Finally, we demonstrate performance and noise sensitivity of the new inversion formulas in numerical simulations.
The congruence subgroup problem for branch groups
Creators: name: Bartholdi, Laurent
name: Siegenthaler, Olivier
name: Zalesskii, Pavel
Publisher: name: arXiv
Year: 2009
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics

description: We state and study the congruence subgroup problem for groups acting on rooted tree, and for branch groups in particular. The problem is reduced to the computation of the congruence kernel, which we split into two parts: the branch kernel and the rigid kernel. In the case of regular branch groups, we prove that the first one is Abelian while the second has finite exponent. We also establish some rigidity results concerning these kernels. We work out explicitly known and new examples of non-trivial congruence kernels, describing in each case the group action. The Hanoi tower group receives particular attention due to its surprisingly rich behaviour.
description: 22 pages, no figure
Mode of getting Thermal Energy Depending of the Average Outside Temperature on the City of Bitola
Creators: name: Zikovska, Suzana
name: Armenski, Slave
Publisher: name: UIKTEN
Year: 2015
Subjects: outside temperature
heat consumption
curve
heat
coefficient of heating

description: TEM Journal; Vol 4, No 4, 2015. ISSN 2217-8309
description: This research was based on the latest achievements in the development of energy technologies, such as: efficiency, energy saving, ecology and flexibility. The study used data from the measurements of external temperature for the city of Bitola in the period 1996 - 2010 year. The research covers a range of activities: assessment of the required heat consumption and defining the curve thermal load under ambient conditions of Bitola. The analysis of the research is based on the calculation and assessment of the required heat for heating curve according to the outside temperature. It is the basis for defining the mode of operation of a plant for production of thermal energy.
A delta Scuti star in the post-MS contraction phase: 44 Tauri
Creators: name: Lenz, P.
name: Pamyatnykh, A. A.
name: Zdravkov, T.
name: Breger, M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The evolutionary stage of the delta Scuti star 44 Tau has been unclear. Recent asteroseismic studies have claimed models on the main sequence, as well as in the expansion phase of the post-main sequence evolution. However, these models could not reproduce all of the observed frequencies, the mode instability range, and the fundamental stellar parameters simultaneously. A recent photometric study has increased the number of detected independent modes in 44 Tau to 15, and a newly found gravity mode at 5.30 c/d extends the observed frequency range. Aims. One of the possible evolutionary stages of 44 Tau has not yet been considered: the overall contraction phase after the main sequence. We computed asteroseismic models to examine whether models in this evolutionary stage provide a better fit of the observed frequency spectrum. Methods. We used Dziembowski's pulsation code to compute nonadiabatic frequencies of radial and nonradial modes. Observation of two radial modes and an avoided crossing of dipole modes put strong constraints on the models. A two-parametric overshooting routine is utilized to determine the efficiency of element mixing in the overshoot layer above the convective core. Results. We find that pulsation models in the post-MS contraction phase successfully reproduce the observed frequency range, as well as the frequency values of all individual radial and nonradial modes. The theoretical frequencies of the mixed modes at 7.79 c/d and 9.58 c/d are in better agreement with the observations if efficient element mixing in a small overshoot layer is assumed.
description: 8 pages, 7 figures, 3 tables, accepted for publication in A&A
Ultra Wide Band THz IRS Communications: Applications, Challenges, Key Techniques, and Research Opportunities
Creators: name: Hao, Wanming
name: Zhou, Fuhui
name: Zeng, Ming
name: Dobre, Octavia A.
name: Al-Dhahir, Naofal
Publisher: name: arXiv
Year: 2022
Subjects: subject: Information Theory (cs.IT)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Terahertz (THz) communication is a promising technology for future wireless networks due to its ultra-wide bandwidth. However, THz signals suffer from severe attenuation and poor diffraction capability, making it vulnerable to blocking obstacles. To compensate for these two shortcomings and improve the system performance, an intelligent reflecting surface (IRS) can be exploited to change the propagation direction and enhance the signal strength. In this article, we investigate this promising ultra wide band (UWB) THz IRS communication paradigm. We start by motivating our research and describing several potential application scenarios. Then, we identify major challenges faced by UWB THz IRS communications. To overcome these challenges, several effective key techniques are developed, i.e., the time delayer-based sparse radio frequency antenna structure, delay hybrid precoding and IRS deployment. Simulation results are also presented to compare the system performance for these proposed techniques, thus demonstrating their effectiveness. Finally, we highlight several open issues and research opportunities for UWB THz IRS communications.
Skew spectrum and smoothed skewness of 21-cm signals from epoch of reionization
Creators: name: Ma, Qing-Bo
name: Peng, Ling
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Due to the non-linear ionizing and heating processes, the 21-cm signals from epoch of reionization (EoR) are expected to have strong non-Gaussian fluctuations. In this paper, we use the semi-numerical simulations to study the non-Gaussian statistics i.e. skew spectrum and smoothed skewness of the 21-cm signals from EoR. We find the 21-cm skew spectrum and smoothed skewness have similar evolution features with the 21-cm bispectrum. All of them are sensitive to the EoR models, while not too much to the cosmic volume applied. With the SKA1-low telescope as reference, we find both the skew spectrum and smoothed skewness have much higher S/N ratios than the 21-cm bispectrum.
description: 7 pages, 5 figures, mnras accepted
Integrated Usability Testing
Creators: name: Ternauciuc, Andrei
name: Vasiu, Radu
Publisher: name: UIKTEN
Year: 2015
Subjects: usability testing
integrated tool
Moodle

description: TEM Journal; Vol 4, No 4, 2015. ISSN 2217-8309
description: It is essential to regularly test the usability of a learning management system, in order to ensure a fast adoption by new users and rapidly shift the focus from the platform to the content and the learning experience. Quantitative testing yields the most reliable results due to the large number of data points acquired, but lacks the in-depth analysis of the qualitative research from a controlled testing setup.
We are proposing in this paper an integrated usability testing tool, which can replace a certain type of laboratory testing, where the users’ actions on the real platform are measured and analyzed.
We conducted tests with the tool and compared the results with a small scale laboratory test using the same scenarios. The results seem to confirm the proposed tool as a viable alternative to the laboratory test.
title: Wind Noise: Its Effect on Human Audition
Creators: name: Nelson, William Roy
Publisher: name: Utah State University
Year: 1972

description: An examination was made of the acoustic characteristics of wind turbulence generated noise in a car traveling at 70 mph over smoothly paved highway with the driver's window down. The overall noise level was found to be at 112 dB SPL with the predominance of energy in the low frequencies. The study was concerned with the effects of such noise on human audition in terms of temporary threshold shift.
Twenty normal hearing young adults were exposed to a tape recording of wind noise for 15 minutes. Post-exposure auditory thresholds at seven discreet frequencies were compared to pre-exposure auditory thresholds at the same seven frequencies. Threshold shift was taken as the difference between pre-exposure and post-exposure thresholds. Post-exposure thresholds were obtained immediately after exposure and at five, ten and fifteen minutes after exposure.
The results of the study indicate to significant difference in the amount of threshold shift or the rate of recover based on sex.
A significant difference was observed int he amount of threshold shift at different test frequencies. The rate of recovery at different test frequencies was also significantly different.
Decisions of significance were made at the .01 level of confidence. The statistical tool utilized was analysis of variance.
The role of weak charging in metastable colloidal clusters
Creators: name: Klix, Christian L.
name: Murata, Ken-ichiro
name: Tanaka, Hajime
name: Williams, Stephen R.
name: Malins, Alex
name: Royall, C. Patrick
Publisher: name: arXiv
Year: 2009
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We study metastable clusters in a colloidal system with competing interactions. A short-ranged polymer-induced attraction drives clustering, while a weak, long-ranged electrostatic repulsion prevents extensive aggregation. We compare experimental yields of cluster structures expected from theory, which assumes simple addition of the competing isotropic interactions. For clusters of size $4\leq m\leq6$, the yield is significantly less than that expected. We attribute this to an anisotropic self-organized surface charge distribution linked to the cluster symmetry: non-additivity of electrostatic repulsion and polymer-induced attraction. 7-membered clusters have a clear optimal yield of the expected pentagonal bipyramid structure as a function of strength of the attractive interaction.
description: 4 pages, 4 figures
title: Inheritance and Linkage Studies of Some Mutant Characters in Sugarbeets, Beta Vulgaris L.
Creators: name: Stander, John R.
Publisher: name: Utah State University
Year: 1969

description: The inheritance and linkage of chlorina (ch2), virescens (vi4), and a plantain leaf character (PI2PI3) in sugarbeets were studied. Chlorina acted as a simple recessive which confirmed work reported previously. Chlorinas from two sources were found to be identical. Virescens and plantain leaf were found to be different from those reported in the literature. Virescens acted as a simple recessive. Male sterility in the virescent material was of the a1 mendelian type. Plantain leaf exhibited intermediate inheritance and was found to be controlled by the action of two dominant complementary factors. Linkage tests showed vi4 and ch2 to be independent of each other, the a1 gene for male sterility, and genes in the Y-R-B group. One of the plantain leaf loci, PI2, showed independence of the R gene.
NewsPod: Automatic and Interactive News Podcasts
Creators: name: Laban, Philippe
name: Ye, Elicia
name: Korlakunta, Srujay
name: Canny, John
name: Hearst, Marti A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: News podcasts are a popular medium to stay informed and dive deep into news topics. Today, most podcasts are handcrafted by professionals. In this work, we advance the state-of-the-art in automatically generated podcasts, making use of recent advances in natural language processing and text-to-speech technology. We present NewsPod, an automatically generated, interactive news podcast. The podcast is divided into segments, each centered on a news event, with each segment structured as a Question and Answer conversation, whose goal is to engage the listener. A key aspect of the design is the use of distinct voices for each role (questioner, responder), to better simulate a conversation. Another novel aspect of NewsPod allows listeners to interact with the podcast by asking their own questions and receiving automatically generated answers. We validate the soundness of this system design through two usability studies, focused on evaluating the narrative style and interactions with the podcast, respectively. We find that NewsPod is preferred over a baseline by participants, with 80% claiming they would use the system in the future.
description: Accepted at IUI 2022, 16 pages, 10 figures
Comparison of the Helicobacter Pylori Diagnosis Methods with Analytic Network Process
Creators: name: KONAKLI, Hacer
name: KONAKLI, Zafer
name: GÖKSU, Ali
Publisher: name: UIKTEN
Year: 2015
Subjects: Helicobacter Pylori
Invasive Diagnosis Methods
Non-Invasive Diagnosis Methods
Analytic Network Process - ANP

description: TEM Journal; Vol 4, No 4, 2015. ISSN 2217-8309
description: Helicobacter pylori is infecting %70-80 of the world’s population and is assumed to cause gastric diseases. Diagnosis of the bacteria is crucial for the treatment of the bacteria related infections. Histology, culture, urea breath test, stool antigen test some of the diagnosis methods each having specific strength and weaknesses as sensitivity, specificity, cost, easiness, time, effectiveness in the treatment and laboratory requirements. In this study, three of the commonly used H. pylori diagnosis methods: histology, culture and urea breath test, are evaluated with Analytic network process (ANP) and the rank of the criteria and alternatives are obtained. The evaluation of the methods and the rank of the diagnosis methods can reduce time, cost, and validity of the test results.
Hybridization and isolating mechanisms in Catostomus commersonii and Catostomus macrocheilus
Creators: name: Nelson, Joseph Schieser
Publisher: name: University of British Columbia
Year: 2011

description: Catostomus commersonii and Catostomus macrocheilus are sympatric in three major drainages of British Columbia. Morphological analysis employing a character index and discriminant function analysis of allopatric and sympatric populations revealed that hybrids occurred in nine lakes, representing virtually every lake examined where both species occur. Presumed F1 hybrids made up an average of 7% of the combined populations where hybrids occurred. There was no evidence of backcrossing or swamping. Spawning migrations were studied in eight confined inlets of lakes which have both species. Four inlets supported migrations of both species. Collecting was also done throughout the spawning migration in Cluculz River, an outlet with diversified habitat supporting both species. Postmating isolating mechanisms were studied from artificial crosses of the species, two back-crosses involving hybrid females, and microscopic examination of hybrid testes. An interaction of temporal, habitat, and postmating isolating mechanisms was not considered sufficient to prevent swamping. Ethological isolation is inferred to be of major importance in reducing initial hybridization, while selection against hybrid crosses is inferred to prevent swamping. Hybridization could not be attributed to environmental factors commonly noted in the literature to be associated with hybridization. Males of one species entering the spawning act with males and a female of the other species is considered the main cause of hybridization. Mis-mated individuals, however, have much opportunity for conspecific matings at other times. There was no evidence of reinforcement of isolating mechanisms despite the probable occurrence of hybridization in some areas for at least several hundred years. Natural selection against individuals producing hybrids is apparently low.
title: An Evaluation of Pricing Practices and Their Effect on the Egg Industry in Utah
Creators: name: Sherman, Wilbur N.
Publisher: name: Utah State University
Year: 1966

description: The decade from 1953 to 1963 was one of drastic change for the egg industry in Utah. A study conducted at Utah State University shows that in 1952, slightly more than 40 percent of local egg production was s old in distant markets while in 1964, import data gathered from egg handlers in the State indicate that 20 to 25 percent of the eggs consumed in Utah were imported.
XTE J1906+090: a persistent low luminosity Be X-ray Binary
Creators: name: Sguera, V.
name: Sidoli, L.
name: Bird, A. J.
name: La Palombara, N.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present new results from INTEGRAL and Swift observations of the hitherto poorly studied and unidentified X-ray source XTE J1906+090. A bright hard X-ray outburst (luminosity of $\sim$10$^{36}$ erg s$^{-1}$ above 20 keV) has been discovered with INTEGRAL observations in 2010, this being the fourth outburst ever detected from the source. Such events are sporadic, the source duty cycle is in the range (0.8--1.6)% as inferred from extensive INTEGRAL and Swift monitoring in a similar hard X-ray band. Using five archival unpublished Swift/XRT observations, we found that XTE J1906+090 has been consistently detected at a persistent low X-ray luminosity value of $\sim$10$^{34}$ erg s$^{-1}$, with limited variability (a factor as high as 4). Based on our findings, we propose that XTE J1906+090 belongs to the small and rare group of persistent low luminosity Be X-ray Binaries.
description: Accepted for publication in MNRAS. 7 pages, 6 figures, 5 tables
The outer regions of galaxy clusters: Chandra constraints on the X-ray surface brightness
Creators: name: Ettori, S.
name: Balestra, I.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: (Abridged version) We study the properties of the X-ray surface brightness profiles in a sample of galaxy clusters that were observed with Chandra and have emission detectable with a signal-to-noise ratio higher than 2 at a radius beyond R500 ~ 0.7 R200. Our study aims to measure the slopes of the X-ray surface brightness and of the gas density profiles in the outskirts of massive clusters. These constraints are compared to similar results obtained from observations and numerical simulations of the temperature and dark matter density profiles with the intention of presenting a consistent picture of the outer regions of galaxy clusters. We extract the surface brightness profiles Sb(r) of 52 X-ray luminous galaxy clusters at z>0.3 from X-ray exposures obtained with Chandra. We estimate R200 using both a beta-model that reproduces Sb(r) and scaling relations from the literature. The two methods converge to comparable values. We determine the radius, R_S2N, at which the signal-to-noise ratio is larger than 2 and select the objects in the sample that satisfy the criterion R_S2N/R200 > 0.7. For the eleven selected objects, we model with a power-law the behaviour of Sb(r). We measure a consistent steepening of the Sb(r) profile moving outward from 0.4 R200, where an average slope of -3.6 (sigma=0.8) is estimated. At R200, we evaluate a slope of -4.3 (sigma=0.9) that implies a slope in the gas density profile of -2.6 and a predicted mean value of the surface brightness in the 0.5-2 band of 2e-12 erg/s/cm2/deg2. Combined with estimates of the outer slope of the gas temperature profile and expectations about the dark matter distribution, these measurements allow us to describe properly how X-ray luminous clusters behave out to the virial radius.
description: 7 pages. A&A in press. Minor revisions to match published version: added references, corrected typos
Non-perturbative particle production and differential geometry
Creators: name: Matsuda, Tomohiro
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: This paper proposes a basic method for understanding stationary particle production on manifolds by means of the Stokes phenomenon. We studied the Stokes phenomena of the Schwinger effect, the Unruh effect and Hawking radiation in detail focusing on the origin of their continuous particle production. We found a possibility that conventional calculations may not explain the experimental results.
description: 18pages, 4 figure, improved discussions
title: Youth Motorcycle-Related Traumatic Brain Injury and State Helmet Laws, 2005–2007
Creators: name: Weiss, Harold
name: Agimi, Yll
name: Steiner, Claudia
name: Vegega, Maria
name: University of Pittsburgh: Center for Injury Research and Control
name: University of Pittsburgh: Graduate School of Public Health
name: Association of Schools of Public Health (United States)
name: Agency for Healthcare Research and Quality. Center for Delivery, Organization and Markets
name: National Highway Traffic Safety Administration: Office of Advanced Vehicle Safety Research
Publisher: name: National Highway Traffic Safety Administration: Office of Behavioral Safety Research
publisherIdentifier: https://ror.org/04gcfqs37
publisherIdentifierScheme: ROR
Year: 2011
Subjects: classificationCode: https://trt.trb.org/term/90658
subject: Motorcycle crashes
classificationCode: https://trt.trb.org/term/94288
subject: Motorcycle helmets
classificationCode: https://trt.trb.org/term/90792
subject: Traumatic brain injuries
classificationCode: https://trt.trb.org/term/88911
subject: Laws and legislation
classificationCode: https://trt.trb.org/term/90602
subject: Highway safety
classificationCode: https://trt.trb.org/term/91698
subject: Traffic crash victims
classificationCode: https://trt.trb.org/term/91562
subject: Young adults
classificationCode: https://trt.trb.org/term/90775
subject: Fatalities

description: Motorcyclists are 25 times more likely than passenger car occupants to die in motor vehicle traffic crashes and five times more likely to be injured per vehicle mile traveled (VMT) (National Highway Traffic Safety Administration, 2011). They are 58 times more likely to be killed than passenger vehicle occupants on a per trip basis (Beck, Dellinger, & O’Neil, 2007). Motorcycle (MC) deaths and injuries rose between 1997 and 2008, before declining in 2009. Factors associated with the growth in fatalities and injuries include increased use of motorcycles for recreation, more powerful motorcycles, older riders, and the desire for fuel-efficient travel. An additional factor is the repeals of universal (all-age) helmet laws (Coben, Steiner, & Miller, 2007). Fundamental to reducing motorcycle head injury among MC riders is the use of proper safety helmets. In a recent Cochrane meta-analysis of 61 different observational studies, Liu et al. concluded that motorcycle helmets reduce head injury death by 42% and head injury by 69% (Liu et al., 2008). Despite demonstrated efficacy, 30 States abandoned universal helmet laws following withdrawal of Federal sanctions. This study discusses the effects of helmet laws on the severity of brain injuries among motorcycle drivers.
TOI-2498 b: A hot bloated super-Neptune within the Neptune desert
Creators: name: Frame, Ginger
name: Armstrong, David J.
name: Cegla, Heather M.
name: Fernández, Jorge Fernández
name: Osborn, Ares
name: Adibekyan, Vardan
name: Collins, Karen A.
name: Mena, Elisa Delgado
name: Giacalone, Steven
name: Kielkopf, John F.
name: Santos, Nuno C.
name: Sousa, Sérgio G.
name: Stassun, Keivan G.
name: Ziegler, Carl
name: Anderson, David R.
name: Barros, Susana C. C.
name: Bayliss, Daniel
name: Briceño, César
name: Conti, Dennis M.
name: Dressing, Courtney D.
name: Dumusque, Xavier
name: Pedro~Figueira
name: Fong, William
name: Gill, Samuel
name: Hawthorn, Faith
name: Jenkins, Jon M.
name: Jensen, Eric L. N.
name: Keniger, Marcelo Aron F.
name: Latham, David W.
name: Law, Nicholas
name: Lissauer, Jack J.
name: Mann, Andrew W.
name: Nielsen, Louise D.
name: Osborn, Hugh
name: Paegert, Martin
name: Seager, Sara
name: Schwarz, Richard P.
name: Shporer, Avi
name: Srdoc, Gregor
name: Strøm, Paul A.
name: Winn, Joshua N.
name: Wheatley, Peter J.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We present the discovery and confirmation of a transiting hot, bloated Super-Neptune using photometry from TESS and LCOGT and radial velocity measurements from HARPS. The host star TOI-2498 is a V = 11.2, G-type (T$_{eff}$ = 5905 $\pm$ 12K) solar-like star with a mass of 1.12 $\pm$ 0.02 M$_{\odot}$ and a radius of 1.26 $\pm$ 0.04 R$_{\odot}$. The planet, TOI-2498 b, orbits the star with a period of 3.7 days, has a radius of 6.1 $\pm$ 0.3 R$_{\oplus}$, and a mass of 35 $\pm$ 4 M$_{\oplus}$. This results in a density of 0.86 $\pm$ 0.25 g cm$^{-3}$. TOI-2498 b resides on the edge of the Neptune desert; a region of mass-period parameter space in which there appears to be a dearth of planets. Therefore TOI-2498 b is an interesting case to study to further understand the origins and boundaries of the Neptune desert. Through modelling the evaporation history, we determine that over its $\sim$3.6 Gyr lifespan, TOI-2498 b has likely reduced from a Saturn sized planet to its current radius through photoevaporation. Moreover, TOI-2498 b is a potential candidate for future atmospheric studies searching for species like water or sodium in the optical using high-resolution, and for carbon based molecules in the infra-red using JWST.
description: 13 pages, 11 figures, accepted for publication in MNRAS
Normalizing Resistor Networks
Creators: name: Cockett, Robin
name: Kalra, Amolak Ratan
name: Srinivasan, Priyaa Varshinee
Publisher: name: arXiv
Year: 2023
Subjects: subject: Category Theory (math.CT)
subject: Quantum Physics (quant-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: Star to mesh transformations are well-known in electrical engineering, and are reminiscent of local complementation for graph states in qudit stabilizer quantum mechanics. This paper describes a rewriting system for resistor circuits over any positive division rig using general star to mesh transformations. We show how these transformations can be organized into a confluent and terminating rewriting system on the category of resistor circuits. Furthermore, based on the recently established connections between quantum and electrical circuits, this paper pushes forward the quest for approachable normal forms for stabilizer quantum circuits.
description: In Proceedings ACT 2023, arXiv:2312.08138
Kas kohustuslikud regulaarsed terviseseisundi hindamised ja terviseauditid on ikka hea idee?
Creators: name: Kalda, Ruth
Publisher: name: OÜ Celsius Healthcare
Year: 2013

description: Eesti Arst 2013; 92(3):116–117
description: Eesti Arst, Märts 2013
Asymmetric Collision of Two Shock Waves in AdS_5
Creators: name: Albacete, Javier L.
name: Kovchegov, Yuri V.
name: Taliotis, Anastasios
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider high energy collisions of two shock waves in AdS_5 as a model of ultrarelativistic nucleus-nucleus collisions in the boundary theory. We first calculate the graviton field produced in the collisions in the NLO and NNLO approximations, corresponding to three- and four-graviton exchanges with the shock waves. We then consider the asymmetric limit where the energy density in one shock wave is much higher than in the other one. In the boundary theory this setup corresponds to proton-nucleus collisions, with the nucleus being the denser of the two shock waves and the proton being the less dense one. Employing the eikonal approximation we find the exact high energy analytic solution for the metric in AdS_5 for the asymmetric collision of two delta-function shock waves. The solution resums all-order graviton exchanges with the "nucleus" shock wave and a single-graviton exchange with the "proton" shock wave. Using the holographic renormalization prescription we read off the energy-momentum tensor of the matter produced in proton-nucleus collisions. We show in explicit detail that in the boundary theory the proton is completely stopped by strong-coupling interactions with the nucleus, in agreement with our earlier results. We also apply the eikonal technique to the asymmetric collision of two unphysical delta-prime shock waves, which we introduced in an earlier work as a means of modeling nuclear collisions with weak coupling initial dynamics. We obtain a surprising result that, for delta-prime shock waves, the multiple bulk graviton exchange series giving the leading energy-dependent contribution to the energy-momentum tensor terminates at the order of two graviton exchanges with the nucleus.
description: 44 pages, 8 figures; v2: typos corrected, references added; v3: a subsection added, more typos corrected
title: Alfalfa Resistance to the Clover Seed Chalcid Bruchophagus Gibbus (Boheman)
Creators: name: Minion, Gerald Douglas
Publisher: name: Utah State University
Year: 1961

description: The destructive nature of the clover seed chalcid has been known since the latter part of the 19th century. This jet-black Hymenoptera, often called the "chalcis-fly," destroys from 10 to 20 percent of the alfalfa seed in Utah each year. Damage as high as 85 percent has been reported.
Spectroscopic Searches for Evolutionary Orbital Period Changes in WR+OB Binaries: The case of CQ Cep and CX Cep
Creators: name: Shaposhnikov, I.
name: Cherepashchuk, A.
name: Dodin, A.
name: Postnov, K.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the results of spectroscopic observations of two eclipsing WR+OB-type systems - CQ Cep and CX Cep, performed in 2020-2023 with a low-resolution slit spectrograph TDS ($λλ= 3660-7410$Å, $R = 1300-2500$) on 2.5-m telescope of the SAI MSU Caucasian Mountain Observatory. For CQ Cep, the radial velocity curves of a WN6 star are constructed, the problem of visibility of spectroscopic traces of an OB star is discussed and the components' mass ratio $q\sim 0.6$ is estimated. For CX Cep, the radial velocity curves are constructed for both the WN5 and O5 components enabling their masses and circular orbit elements to be refined. The comparison of the radial velocity curves of these systems obtained in different epochs allowed us to derive the orbital period change rate $\dot{P}$ by the spectroscopic method, which is found to be in good agreement with estimates obtained by comparing the moments of primary eclipse minima: $\dot{P} = -0.0151\pm0.0013$ s yr$^{-1}$ for CQ Cep and $\dot{P} = 0.054\pm0.009$ s yr$^{-1}$ for CX Cep. The prospects of applicability of the spectroscopic dynamical method for studying the orbital evolution of Galactic WR+OB binaries and related objects are considered. We also discuss the effect of finite sizes of stars with stellar wind mass loss in close binary systems on their orbital evolution.
description: 13 pages, 8 figures, 11 tables, accepted for publication in MNRAS
Regular embeddings of complete bipartite graphs: classification and enumeration
Creators: name: Jones, Gareth A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Combinatorics (math.CO)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 05C10; 05C25, 05C30, 20D10, 20F16

description: The regular embeddings of complete bipartite graphs $K_{n,n}$ in orientable surfaces are classified and enumerated, and their automorphism groups and combinatorial properties are determined. The method depends on earlier classifications in the cases where $n$ is a prime power, obtained in collaboration with Du, Kwak, Nedela and Škoviera, together with results of Itô, Hall, Huppert and Wielandt on factorisable groups and on finite solvable groups.
description: 32 pages
Modification of radiation-induced mutation frequencies by antibiotics in drosophila melanogaster
Creators: name: Mukherjee, Ramendra Nath
Publisher: name: University of British Columbia
Year: 2011

description: The experiments reported in the present dissertation were undertaken to obtain further evidence for the possible roles of protein, RNA and DNA macromolecules in radiation-mutagenesis in Drosophila melanogaster. Several antibiotics were tested for their modifying effects on the frequency of radiation-induced sex-linked recessive lethals. Pre-radiation treatment with actinomycin D significantly reduces the frequency of induced mutations in germ cell stages assumed to include spermatids and spermatocytes. These results are consistent with the hypothesis of a role of proteins in the stabilization (repair) of radiation-induced premutational lesions. Puromycin, a specific inhibitor of protein synthesis is ineffective in the modification of induced mutation frequencies in Drosophila melanogaster. Mitomycin C, is itself a potent mutagen in all germ cell stages, peak mutagenicity occurring in spermatid stages. In combination with ɣ-rays, mitomycin C shows an overall additivity of effect. Mutation frequencies due to mitomycin C are not altered by pre- or concurrent treatment with actinomycin D. This may indicate a different mechanism for mutagenesis by mitomycin C and radiation.
Interplanetary scintillation and pulsar pulse statistics
Creators: name: Tyul'bashev, S. A.
name: Chashei, I. V.
name: Kitaeva, M. A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The effect of interplanetary plasma on pulsed pulsar radiation passing through is considered. The pulses of two rotating radio transients (J0609+16, J1132+25) and a pulsar (B0320+39) detected on the Large Phased Array (Pushchino observatory) were analyzed. It is shown that in observations at the frequency of 111 MHz, on elongations of 20o-40o, both an increase and a decrease in the number of received pulses are observed. The change in the number of pulses is explained by the distortion of the energy distribution of pulses due to interplanetary scintillation. These changes in the number of observed pulses are in qualitative agreement with the expected dependence of the scintillation index on the observed sources elongation. Analytical expressions are obtained that allow estimating the effective modulation index from observations of individual pulses for the power distribution of pulses by energy.
description: accepted to MNRAS, 5 pages, 3 figures