University Transportation Center for Railway Safety
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[Olmito] Photograph of John Peavey at Train Wreck
No full textJohn Peavey near a wrecked train engine.https://scholarworks.utrgv.edu/hidalgohist_aa/1615/thumbnail.jp
[Premont] Photograph of Sheets Ranch
No full textHarvesting 4 year old citrus at Sheets Ranch.https://scholarworks.utrgv.edu/hidalgohist_aa/1594/thumbnail.jp
[Alamo] Photograph of Assembled Mule Teams
No full textMule teams assembled for canal in Alamo, Texas.https://scholarworks.utrgv.edu/hidalgohist_aa/1667/thumbnail.jp
[Progreso] Photograph of Toluca Ranch House
No full textView of the Toluca Ranch House.https://scholarworks.utrgv.edu/hidalgohist_aa/1575/thumbnail.jp
[Weslaco] Photograph of Model Drug Store Botica Farmacia
No full textModel Drug Store Botica Farmacia in Weslaco, Texas.https://scholarworks.utrgv.edu/hidalgohist_aa/1512/thumbnail.jp
[McAllen] Photograph of City Hospital
No full textCity Hospital located in McAllen, Texas on Main and Houston St.https://scholarworks.utrgv.edu/hidalgohist_aa/1703/thumbnail.jp
[Mercedes] Photograph of Lutheran Ladies Aid
No full textLutheran Ladies Aid posing together.https://scholarworks.utrgv.edu/hidalgohist_aa/1579/thumbnail.jp
Transdiagnostic links of reward processing in obsessivecompulsive disorder and depression
No full textObjectives
Transdiagnostic models aim to uncover shared mechanisms across mental disorders. Reward responsiveness (the ability to experience pleasure from rewarding stimuli) is a plausible, yet underexplored, transdiagnostic mechanism linking obsessive-compulsive disorder (OCD) and depression. This study used network analysis to (1) examine how key reward responsiveness domains are interlinked in individuals with OCD and (2) explore how each domain is uniquely associated with OCD and depression. Methods
A total of 1345 individuals with a history of OCD symptoms (ages 18–88, 71 % women) from Latino communities in the United States (including Puerto Rico) and nine Latin American countries completed validated measures of reward responsiveness, OCD, and depression. Network analyses evaluated interrelations among reward responsiveness domains and their links to OCD and depression. Results
Hobbies and social interactions were the most central domains in the reward responsiveness network. Higher OCD severity was uniquely associated with lower responsiveness to social interactions, while higher depression severity was uniquely linked to reduced responsiveness in hobbies and goal-directed behaviors. Conclusions
Reward responsiveness is relevant to both OCD and depression. Interventions that enhance engagement in central domains, such as hobbies and social interactions, may improve outcomes. Future research should explore reward responsiveness in other mental disorders to inform transdiagnostic intervention strategies
Hot donors in cataclysmic variables: The case of EI Psc
Full text linkContext. We present results of time-resolved optical spectroscopy and photometry of the short-orbital period dwarf nova EI Psc.
Aims. This study aims to determine fundamental system parameters of EI Psc, study properties of accretion structures in the system, and investigate its origin and current evolution state.
Methods. We analyse newly obtained time-resolved spectroscopic and photometric observations as well as archival data. We used light curve modelling, Doppler tomography, and MESA evolutionary models to study the characteristics of EI Psc.
Results. The system contains a relatively low temperature (Teff = 6130 K) white dwarf with mass of MWD = 0.70(4) M⊙. The mass of the warm (T2 = 4440 K) secondary is M2 = 0.13 M⊙. The inclination of the system is i = 44.°5(7). The mass accretion rate is ≈4 × 10−13 M⊙ year−1. The long-term light curve of the system shows outbursts and superoutbursts. The quiescence light curve is double-humped and is formed by the combination of radiation from the Roche lobe filling the hot secondary and the hot spot. The radius of the outer disc is about two times smaller than the tidal truncation radius. Most of the disc’s emission consists of emission lines and radiation from the hot spot at the stream-disc impact region.
Conclusions. These types of systems are formed from progenitors with a low mass WD MWD ≲ 0.6 M⊙ and relatively massive secondaries 1.1 − 1.5 M⊙ with initial orbital periods on a scale of days. The number of similar systems is expected to be significantly lower than the usual CVs due to a lower forming rate of their relatively massive progenitors
Optimal quantization for a probability measure on a nonuniform stretched Sierpiński triangle
No full textQuantization for a Borel probability measure refers to the idea of estimating a given probability by a discrete probability with support containing a finite number of elements. In this paper, we have considered a Borel probability measure P on R 2 , which has support a nonuniform stretched Sierpiński triangle generated by a set of three contractive similarity mappings on R 2 . For this probability measure, we investigate the optimal sets of n -means and the n th quantization errors for all positive integers n