Miracle-dz/UniFAR-FTUs huggingface dataset:
New features of black strings and branes in higher dimensional gravity due to a cosmological constant

This thesis is essentially organized in two parts: braneworlds and higher dimensional black objects with a cosmological constant. We present solitonic braneworld models where the brane are inflating and with the presence of a cosmological constant, by analyzing four particular models. These models, although slightly different exhibit common features which are pointed out. We also consider $1+1$ dimensional toy models for coupling fermionic matter fields to braneworld. In particular, we focus on a kink or kink/anti-kink solution of the Sine-Gordon model, which can be seen as modeling a brane in the dimensions transverse to our four dimensional spacetime. We also analyze the stability of three particular models admitting kink or anti-kink like solutions and show that the stability equations are Poschl-Teller equations. In the second part after quickly reviewing available analytically known solutions, we present the numerical construction of the higher dimensional charged rotating black hole with a cosmological constant. Then, we present the black string solution and review the stability problem of the latter before investigating the existence of a de Sitter black string, which turns out not to be regular. Finally, we present the AdS counterpart of the black string solution and study its stability. Then, we construct numerically non uniform black strings, first in a perturbative approach, then in the full non linear regime. Our result suggest the existence of a thermodynamically stable phase of non uniform black string and point to the presence of a phase of AdS localized black hole. Moreover, we argue that the phase transition from uniform to non uniform black strings can be of order larger than one in any number of dimensions, which is not the case without a cosmological constant.
A Spatiotemporal Calibration Algorithm for IMU–LiDAR Navigation System Based on Similarity of Motion Trajectories

The fusion of light detection and ranging (LiDAR) and inertial measurement unit (IMU) sensing information can effectively improve the environment modeling and localization accuracy of navigation systems. To realize the spatiotemporal unification of data collected by the IMU and the LiDAR, a two-step spatiotemporal calibration method combining coarse and fine is proposed. The method mainly includes two aspects: (1) Modeling continuous-time trajectories of IMU attitude motion using B-spline basis functions; the motion of the LiDAR is estimated by using the normal distributions transform (NDT) point cloud registration algorithm, taking the Hausdorff distance between the local trajectories as the cost function and combining it with the hand–eye calibration method to solve the initial value of the spatiotemporal relationship between the two sensors’ coordinate systems, and then using the measurement data of the IMU to correct the LiDAR distortion. (2) According to the IMU preintegration, and the point, line, and plane features of the lidar point cloud, the corresponding nonlinear optimization objective function is constructed. Combined with the corrected LiDAR data and the initial value of the spatiotemporal calibration of the coordinate systems, the target is optimized under the nonlinear graph optimization framework. The rationality, accuracy, and robustness of the proposed algorithm are verified by simulation analysis and actual test experiments. The results show that the accuracy of the proposed algorithm in the spatial coordinate system relationship calibration was better than 0.08° (3δ) and 5 mm (3δ), respectively, and the time deviation calibration accuracy was better than 0.1 ms and had strong environmental adaptability. This can meet the high-precision calibration requirements of multisensor spatiotemporal parameters of field robot navigation systems.
A Study on Determinants of Managerial Communication in Hospitality Industry in Kathmandu Valley: A Structural Equation Modelling Analysis

The past half-century has seen a remarkable worldwide movement toward gender equality on many key economic and social indicators but trends have not been uniform. Increased rates of global Cultural differences both within and across countries. Multicultural issues in the workplace are more pervasive, complex, and subtle, where people from different cultural backgrounds bring different meanings, values, assumptions, and discourse styles into the workplace conversation; such differences often lead to misunderstandings and breakdowns in communication, and can threaten a common orientation to organizational goals. The major objective of this study is to analyzed factor determining managerial communication in hospitality industry. The study has accepted explanatory research design and opted five-star hotel as population sample which lies in Kathmandu valley where convenience sampling was used to select respondent. Additionally, data was collected by using structured questionnaire which was set in KOBO Toolbox and obtained data was analyzed by using descriptive and inferential analyses through MS-Excel, KOBO toolbox, SPSS and AMOS respectively. The result indicates that uncertainty avoidance, institutional collectivism, future orientation, performance orientation, participative, charismatic/ value-based and autonomous have significant relationship with each other which also indicates that all variables have significant influence on cultural diversity in managerial communication.
The Spatial Distribution of Satellite Galaxies Selected from Redshift Space

We investigate the spatial distribution of satellite galaxies using a mock redshift survey of the first Millennium Run simulation. The satellites were identified using common redshift space criteria, therefore the sample includes a large percentage of interlopers. The satellite locations are well fitted by a combination of a Navarro, Frenk and White (NFW) density profile and a power law. At fixed stellar mass, the NFW scale parameter, rs, for the satellite distribution of red hosts exceeds rs for the satellite distribution of blue hosts. In both cases, the dependence of rs on host stellar mass is well fitted by a power law. For the satellites of red hosts, r s red ∝ ( M * / M ⊙ ) 0.71 ± 0.05 , while for the satellites of blue hosts r s blue ∝ ( M * / M ⊙ ) 0.48 ± 0.07 . For hosts with stellar masses M * ≳ 4 × 10 10 M ⊙ , the satellite distribution around blue hosts is more concentrated than is the satellite distribution around red hosts. The spatial distribution of the satellites of red hosts traces that of the hosts’ halos; however, the spatial distribution of the satellites of blue hosts is more concentrated than that of the hosts’ halos by a factor of ∼2. Our methodology is general, and applies to any analysis of satellites in a mock redshift survey. However, our conclusions necessarily depend upon the semi-analytic galaxy formation model that was adopted, and different galaxy formation models may yield different results.
A study of the association between polymorphisms in the genes for interleukins IL-6 and IL-10 and negative symptoms subdomains in schizophrenia

Background: Schizophrenia is a severe mental illness manifested by various symptoms. Negative symptoms (NS) are associated with disability and poor function of patients. The study of NS neurobiology is complicated by their heterogeneity. Factor analysis revealed two distinct NS subdomains with different pathophysiological mechanisms: volitional pathology, including avolition and apathy (AA), and diminished expression (DE). Inflammation is one mechanism that may underlie NS, including their heterogeneity. Aims: To search for the association between genes for interleukins (IL-6 -174 G/C, IL-10 -592 C/A, and IL-10 -1082 G/A) and NS subdomains. Materials and Methods: The study included 275 patients with schizophrenia. NS factors were calculated based on the Positive and Negative Syndromes Scale. Results: There was a significant main effect of IL-10 polymorphisms on the AA, but not the DE subdomain. Mean score on the AA subdomain was higher in the IL-10 -592 AA compared to the CC genotype. Differences between IL-10 -1082 G/A genotypes were dose dependent. The lowest score was observed for the IL-10 -1082 GG genotype. The association between the IL-6 -174 G/C polymorphism and AA scores was close to the level of significance. Patients with the IL-6 -174 GG genotype had higher score compared to the AA genotype. Conclusion: The results provide further neurobiological evidence for the validity of the NS factor categorization. An imbalance between pro-inflammatory and anti-inflammatory cytokines because of genetic variations is associated with the AA NS subdomain that is supposed to be a more severe aspect of psychopathology compared to the DE.
A SPITZER CENSUS OF TRANSITIONAL PROTOPLANETARY DISKS WITH AU-SCALE INNER HOLES

Protoplanetary disks with AU-scale inner clearings, often referred to as transitional disks, provide a unique sample for understanding disk dissipation mechanisms and possible connections to planet formation. Observations of young stellar clusters with the Spitzer Space Telescope have amassed mid-infrared (IR) spectral energy distributions (SEDs) for thousands of star-disk systems from which transition disks can be identified. From a sample of eight relatively nearby young regions (d ≲ 400 pc), we have identified about 20 such objects, which we term “classical” transition disks, spanning a wide range of stellar age and mass. We employed strict IR continuum criteria to limit ambiguity: an 8–24 μm spectral slope limit (α>0) to select for robust optically thick outer disks, and 3.6–5.8 μm spectral slope and 5.8 μm continuum excess limits to select for optically thin or zero continuum excess from the inner few AU of the disks. We also identified two additional categories representing more ambiguous cases: “warm excess” objects with transition-like SEDs but moderate excess at 5.8 μm, and “weak excess” objects with smaller 24 μm excess that may be optically thin or exhibit advanced dust grain growth and settling. From existing Hα emission measurements, we find evidence for different accretion activity among the three categories, with a majority of the classical and warm excess transition objects still accreting gas through their inner holes and onto the central stars, while a smaller fraction of the weak transition objects are accreting at detectable rates. We find a possible age dependence on the frequency of classical transition objects, with fractions relative to the total population of disks in a given region of a few percent at 1–2 Myr rising to 10%–20% at 3–10 Myr. The trend is even stronger if the weak and warm excess objects are included. This relationship may be due to a dependence of the outer disk clearing timescale with stellar age, suggesting a variety of clearing mechanisms working at different times, or it may reflect that a smaller fraction of all disks actually undergo an inner clearing phase at younger ages. Classical transition disks appear to be less common, and weak transition disks more common, around lower-mass stars (M ≲ 0.3 M☉), which we suggest may be a further indicator of the stellar mass-dependent disk evolution that has been seen in previous studies. The difference in number statistics and accretion activity between the two classes further suggests that they are not connected but rather represent distinct evolutionary outcomes for disks.
Effect of Classic or Delayed Ischemic Conditioning on Left Ventricular Pressure-Volume Relations in Dogs

Objective: Non-pharmacologic interventions such as ischemic conditioning (IC) markedly reduce infarct size but it remains unclear whether this protection translates to a significant attenuation of ischemia-mediated LV contractile dysfunction. In this study we evaluated pressure-volume (P-V) data obtained by the load-insensitive conductance catheter method, to examine LV pressure-volume (LVP-V), diastolic function and ventricular-arterial coupling in anesthetized dogs exposed to ischemic conditioning (IC) or delayed IC (dIC; 48h prior to ischemia). The objective was to determine if IC, or dIC pre-treatment could influence post-ischemic recovery of LV contractile function. Methods: Three groups were studied – nIC, IC and dIC; all dogs underwent 90-min acute coronary occlusion (CO) followed by 180-min reperfusion (REP). IC consisted of 4 cycles of 5-min CO and 5-min REP of the left main coronary artery. LV P-V relations were constructed under steady-state conditions (by transient occlusion of the inferior vena cava) prior to IC treatment and at the end of the experiment; P-V loop data was also acquired at different points during the experiment to evaluate changes in end-systolic and end-diastolic parameters. Results: During CO dP/dtmax and dP/dtmin (indicator of rate of LV relaxation) decreased significantly compared to baseline in the IC group; these variables were unchanged in the dIC group. LVEF decreased during CO and REP in the nIC and IC groups but was stable in the dIC group. Tau was increased only in the IC group during CO and REP. ESV and EDV increased significantly in all groups during CO and REP; none of these negative effects was resorbed by the end of the experimental period. Conclusions: Diminished LV contractile function caused by CO did not improve with IC, or dIC pre-treatment, despite significant reduction in infarct size.
Power Pylon Reconstruction from Airborne LiDAR Data Based on Component Segmentation and Model Matching

In recent years, with the rapid growth of State Grid digitization, it has become necessary to perform three-dimensional (3D) reconstruction of power elements with high efficiency and precision to achieve full coverage when simulating important transmission lines. Limited by the performance of acquisition equipment and the environment, the actual scanned point cloud usually has problems such as noise interference and data loss, presenting a great challenge for 3D reconstruction. This study proposes a model-driven 3D reconstruction method based on Airborne LiDAR point cloud data. Firstly, power pylon redirection is realized based on the Principal Component Analysis (PCA) algorithm. Secondly, the vertical and horizontal distribution characteristics of the power pylon point cloud and the graphical characteristics of the overall two-dimensional (2D) orthographic projection are analyzed to determine segmentation positions and the key segmentation position of the power pylon. The 2D alpha shape algorithm is adopted to obtain the pylon body contour points, and then the pylon feature points are extracted and corrected. Based on feature points, the components of original pylon and model pylon are registered, and the distance between the original point cloud and the model point cloud is calculated at the same time. Finally, the model with the highest matching degree is regarded as the reconstructed model of the pylon. The main advantages of the proposed method include: (1) identifying the key segmentation position according to the graphical characteristics; (2) for some pylons with much missing data, the complete model can be accurately reconstructed. The average RMSE (Root-Mean-Square Error) of all power pylon components in this study was 15.4 cm. The experimental results reveal that the effects of power pylon structure segmentation and reconstruction are satisfactory, which provides method and model support for digital management and security analysis of transmission lines.
Temporal and spectral variations of the photoelectron flux and solar irradiance during an X class solar flare

Photoelectrons are the main energy source of airglow used to diagnose the state of the ionosphere‐thermosphere system. Because of measurement uncertainties and substantial gaps in the historical record, parameterized models of the EUV irradiance and photoelectron flux are generally used to estimate airglow intensities. This paper compares observed and modeled photoelectron spectra from an X3 class flare that occurred on July 15, 2002. The photoelectron data were obtained from the FAST satellite. Model photoelectron spectra were obtained from the Field Line Inter‐hemispheric Plasma (FLIP) model using 10 s cadence solar spectra at 1 nm resolution from the Flare Irradiance Spectral Model (FISM). The observed and modeled spectra agree well temporally and spectrally within the uncertainties of the models and data. Systematic differences found between observed and modeled photoelectron spectra suggest that the solar irradiance from FISM could be improved at wavelengths shortward of 17 nm.
Zeolites as Adsorbents and Photocatalysts for Removal of Dyes from the Aqueous Environment

This study investigated the potential of zeolites (NH4BETA, NH4ZSM-5, and NaY) to remove two frequently used dyes, methylene blue (MB) and rhodamine B (RB), from an aqueous environment. The removal of dyes with zeolites was performed via two mechanisms: adsorption and photocatalysis. Removal of dyes through adsorption was achieved by studying the Freundlich adsorption isotherms, while photocatalytic removal of dyes was performed under UV irradiation. In both cases, the removal experiments were conducted for 180 min at two temperatures (283 K and 293 K), and dye concentrations were determined spectrophotometrically. Additionally, after photodegradation, mineralization was analyzed as chemical oxygen demand. A computational analysis of the structures of MB and RB was performed to gain a deeper understanding of the obtained results. The computational analysis encompassed density functional theory (DFT) calculations and analysis of two quantum-molecular descriptors addressing the local reactivity of molecules. Experimental results have indicated that the considered zeolites effectively remove both dyes through both mechanisms, especially NH4BETA and NH4ZSM-5, due to the presence of active acidic centers on the outer and inner surfaces of the zeolite. The lowest efficiency of dye removal was achieved in the presence of NaY zeolite, which has a lower SiO2/Al2O3 ratio. A more efficient reduction was completed for RB dye, which agrees with the computationally obtained information about reactivity.
High-performance InGaZnO thin-film transistors with high-k amorphous Ba0.5Sr0.5TiO3 gate insulator

We report on high-performance n-channel thin-film transistors (TFTs) fabricated using amorphous indium gallium zinc oxide (a-IGZO) and amorphous Ba0.5Sr0.5TiO3 (a-BST) as the channel and gate dielectric layers, respectively. a-BST∕a-IGZO TFTs achieve low-voltage operation with a high saturation mobility value of 10±1cm2∕Vs, excellent subthreshold slopes of 0.06±0.01V/decade, a low threshold voltage of 0.5±0.1V, and a high on-off current ratio up to 8×107 (W∕L=1000μm∕5μm) at 3V. The high capacitance density of a-BST (145±2nF∕cm2) and the small contact resistance, smaller than the channel resistance, are responsible for the high performance of these TFTs.
The Effect of Humidity on the Dissolution Kinetics and Tablet Properties of Immediate-Release Tablet Formulation Containing Lamotrigine

This study aims to find the effects of high (75%) and low (30%) humidity conditions and its correlation with formulation composition on dissolution kinetics of lamotrigine (LMT) from prepared immediate-release tablets during one- and four-week periods. Two types of fillers microcrystalline cellulose (MCC) or anhydrous lactose (LAC), disintegrant sodium starch glycolate (NaSG, 0.5% or 4%), and lubricant magnesium stearate (MgST, 0.25% or 5%) were used. A three-factor two-stage complete factorial design (23) was used to assess the influence of the composition of the tested formulations. The tablets were produced by direct compression and characterized using a disintegration test, a resistance to crushing test, and dissolution tests (pH 1.2 and pH 6.8). Using Design Expert software, it was concluded that in addition to the effect of fillers on pH 6.8, NaSG has a significant impact after exposure to high and low humidity, as well as its interaction with LAC and MCC. In the dissolution medium pH 1.2, under conditions of high humidity, the content of MgST and NaSG and their interaction show a significant influence. The release rate of LMT was affected by humidity as well as type of excipients and their interactions.
Spatial Bodies: Vulnerable Inclusiveness within Gyms and Fitness Venues in Sweden

Today, gyms and fitness venues set out, on a superficial level at least, to cater to the individual, no matter what their gender and are therefore often seen as inclusive spaces for physical activity and its concomitant health benefits. However, previous research has shown that gyms as such, as well as certain areas within gyms, are perceived as specifically masculine spaces, often referring to a contextually contingent hegemonic masculinity, thereby deterring those who do not align with this image, especially women, but also certain men. Even when these dividing lines are crossed, a gendered movement schema remains, because there are different social expectations of what, how, and where men and women should exercise. As we will see in this paper, these movement schemas are produced and reproduced through discursive spatial linkages within the gym and fitness culture. In addition to investigating in what ways gendered norms are implicated within the very architecture of gyms in general, one gym, in particular, is used as an example since it is written into its statutes that it should work in a norm-critical way, providing a case study that shows an attempt to disrupt this inhibiting gendered spatial discourse and, thereby, possibly creating a more inclusive gym space.
SDSS J0349-0059 is a GW Virginis star

High-speed photometric observations of the spectroscopically discovered PG 1159 star SDSS J034917.41−005917.9 in 2007 and 2009 reveal a suite of pulsation frequencies in the range of 1038–3323 μHz with amplitudes between 3.5 and 18.6 mmag. SDSS J034917.41−005917.9 is therefore a member of the GW Vir class of pulsating pre-white dwarfs. We have identified 10 independent pulsation frequencies that can be fitted by an asymptotic model with a constant period spacing of 23.61 ± 0.21 s, presumably associated with a sequence of l = 1 modes. The highest amplitude peak in the suite of frequencies shows evidence for a triplet structure, with a frequency separation of 14.4 μHz. Five of the identified frequencies do not fit the l = 1 sequence, but are, however, well modelled by an independent asymptotic sequence with a constant period spacing of 11.66 ± 0.13 s. It is unclear to which l mode these frequencies belong.
EVIDENCE FOR HOT FAST FLOW ABOVE A SOLAR FLARE ARCADE

Solar flares are one of the main forces behind space weather events. However, the mechanism that drives such energetic phenomena is not fully understood. The standard eruptive flare model predicts that magnetic reconnection occurs high in the corona where hot fast flows are created. Some imaging or spectroscopic observations have indicated the presence of these hot fast flows, but there have been no spectroscopic scanning observations to date to measure the two-dimensional structure quantitatively. We analyzed a flare that occurred on the west solar limb on 2012 January 27 observed by the Hinode EUV Imaging Spectrometer (EIS) and found that the hot (∼30MK) fast (>500 km s−1) component was located above the flare loop. This is consistent with magnetic reconnection taking place above the flare loop.