768 research outputs found
Study of spacecraft direct readout meteorological systems
Characteristics are defined of the next generation direct readout meteorological satellite system with particular application to Tiros N. Both space and ground systems are included. The recommended space system is composed of four geosynchronous satellites and two low altitude satellites in sun-synchronous orbit. The goesynchronous satellites transmit to direct readout ground stations via a shared S-band link, relayed FOFAX satellite cloud cover pictures (visible and infrared) and weather charts (WEFAX). Basic sensor data is transmitted to regional Data Utilization Stations via the same S-band link. Basic sensor data consists of 0.5 n.m. sub-point resolution data in the 0.55 - 0.7 micron spectral region, and 4.0 n.m. resolution data in the 10.5 - 12.6 micron spectral region. The two low altitude satellites in sun-synchronous orbit provide data to direct readout ground stations via a 137 MHz link, a 400 Mhz link, and an S-band link
Loss of Cx43 in Murine Sertoli Cells Leads to Altered Prepubertal Sertoli Cell Maturation and Impairment of the Mitosis-Meiosis Switch.
Male factor infertility is a problem in today's society but many underlying causes are still unknown. The generation of a conditional Sertoli cell (SC)-specific connexin 43 (Cx43) knockout mouse line (SCCx43KO) has provided a translational model. Expression of the gap junction protein Cx43 between adjacent SCs as well as between SCs and germ cells (GCs) is known to be essential for the initiation and maintenance of spermatogenesis in different species and men. Adult SCCx43KO males show altered spermatogenesis and are infertile. Thus, the present study aims to identify molecular mechanisms leading to testicular alterations in prepubertal SCCx43KO mice. Transcriptome analysis of 8-, 10- and 12-day-old mice was performed by next-generation sequencing (NGS). Additionally, candidate genes were examined by qRT-PCR and immunohistochemistry. NGS revealed many significantly differentially expressed genes in the SCCx43KO mice. For example, GCspecific genes were mostly downregulated and found to be involved in meiosis and spermatogonial differentiation (e.g., Dmrtb1, Sohlh1). In contrast, SC-specific genes implicated in SC maturation and proliferation were mostly upregulated (e.g., Amh, Fshr). In conclusion, Cx43 in SCs appears to be required for normal progression of the first wave of spermatogenesis, especially for the mitosis-meiosis switch, and also for the regulation of prepubertal SC maturation
Peripheral thyroid hormone levels and hepatic thyroid hormone deiodinase gene expression in dairy heifers on the day of ovulation and during the early peri-implantation period
Background: Before the onset of fetal thyroid hormone production, the transplacental delivery of maternal thyroid hormones is necessary for embryonic and fetal development. Therefore, the adaptation of maternal thyroid hormone metabolism may be important for pregnancy success and embryo survival. The aims of this study were to determine the thyroid hormone levels during the early peri-implantation period until day 18 and on the day of ovulation, to determine whether pregnancy success is dependent on a "normothyroid status" and to determine whether physiological adaptations in maternal thyroid hormone metabolism occur, which may be necessary to provide sufficient amounts of biologically active T3 to support early pregnancy. Therefore, blood samples obtained on the day of ovulation (day 0) and days 14 and 18 of the Holstein-Friesian heifers (n = 10) during the respective pregnant, non-pregnant and negative control cycles were analyzed for thyroid-stimulating-hormone (TSH), thyroxine (T4) and triiodothyronine (T3). Liver biopsies (day 18) from pregnant and respective non-pregnant heifers were analyzed for mRNA expression of the most abundant hepatic thyroid hormone deiodinase (DIO1) by real time qPCR. Results: Although liver DIO1 mRNA expression did not differ between the pregnant and non-pregnant heifers on day 18, the serum concentrations of TSH and T3 on day 18 were higher in non-pregnant heifers compared to pregnant heifers (P < 0.05). Moreover, T3 decreased between day 0 and 18 in pregnant heifers (P < 0.001). Conclusions: In conclusion, no associations between thyroid hormone patterns on day 18 and pregnancy success were detected. During the early peri-implantation period, TSH and T3 may be affected by the pregnancy status because both TSH and T3 were lower on day 18 in pregnant heifers compared to non-pregnant dairy heifers. In further studies, the thyroid hormone axis should be evaluated throughout the entire gestation to confirm these data and identify other possible effects of pregnancy on the thyroid hormone axis in cattle
Irresistable Impulse as a Defense in Criminal Law: A Criticism Based on Modern Psychiatric Concepts
This is a criticism of the decision of the Supreme Court of Washington in the case of State vs. Maish. The opinion states that appellant was accorded a fair trial in every respect, that the trial court committed no error in refusing to give the requested instruction, and that judgment and sentence of the trial court must be, and it is, affirmed. Reference is made to the above decision in detail, the instruction referred to was one requested by the defendant and refused by the trial court. It follows: You are instructed that if you believe from the evidence that at the time of committing the acts charged in the information, the defendant was suffering from such a perverted and deranged condition of his mental faculties as to render him incapable of distinguishing between right and wrong, or unconscious at such time of the nature of the act charged in the indictment while committing the same, or where although conscious of them and able to distinguish between right and wrong, and to know the acts were wrong, yet his mind and his will the governing power of his mind was, otherwise involuntarily, so completely destroyed that his action was not subject to it but beyond his control, it will be your duty to acquit the defendant, and in such case your verdict shall be not guilty. This instruction clearly contains the irresistible impulse plea, viz., a deranged condition of his mental faculties where, although able to distinguish between right and wrong, yet the governing power of his mind was otherwise involuntarily so completely destroyed that his action was not subject to it, but beyond his control
Longitudinal study of the effects of teat condition on the risk of new intramammary infections in dairy cows
Machine milking–induced alterations of teat tissue may impair local defense
mechanisms and increase the risk of new intramammary infections. The objective
of the current study was to assess the influence of short-term and long-term
alterations of teat tissue and infectious status of the udder quarter on the
risk of naturally occurring new intramammary infections, inflammatory
responses, and mastitis. Short-term and long-term changes in teat condition of
right udder quarters of 135 cows of a commercial dairy farm in Saxony-Anhalt,
Germany, were recorded monthly for 10 mo using simple classification schemes.
Quarter milk samples were collected from all examined quarters at each farm
visit. Bacteriological culture results and somatic cell counts of quarter milk
samples were used to determine new inflammatory responses (increase from
≤100,000 cells/mL to >100,000 cells/mL between 2 samples), new infections
(detection of a pathogen from a quarter that was free of the same pathogen at
the preceding sampling), and new mastitis (combination of new inflammatory
response and new infection). Separate Poisson mixed models for new
inflammatory responses, new infections, and new mastitis caused by specific
pathogens or groups of pathogens (contagious, environmental, major, minor, or
any) were used to estimate risk ratios and 95% confidence intervals. Data
preparation and parameter estimation were performed using the open source
statistical analysis software R. We observed no effect of any variable
describing teat condition on the risk of new intramammary infections,
inflammatory responses, or mastitis. Intramammary infections of the same udder
quarter in the preceding month did not affect risk either
It takes time to prime: Semantic priming in the ocular lexical decision task
Two eye-tracking experiments were conducted in which the manual response mode typically used in lexical decision tasks (LDTs) was replaced with an eye-movement response through a sequence of 3 words. This ocular LDT combines the explicit control of task goals found in LDTs with the highly practiced ocular response used in reading text. In Experiment 1, forward saccades indicated an affirmative lexical decision (LD) on each word in the triplet. In Experiment 2, LD responses were delayed until all 3 letter strings had been read. The goal of the study was to evaluate the contribution of task goals and response mode to semantic priming. Semantic priming is very robust in tasks that involve recognition of words in isolation, such as LDT, but limited during text reading, as measured using eye movements. Gaze durations in both experiments showed robust semantic priming even though ocular response times were much shorter than manual LDs for the same words in the English Lexicon Project. Ex-Gaussian distribution fits revealed that the priming effect was concentrated in estimates of tau (τ), meaning that priming was most pronounced in the slow tail of the distribution. This pattern shows differential use of the prime information, which may be more heavily recruited in cases in which the LD is difficult, as indicated by longer response times. Compared with the manual LD responses, ocular LDs provide a more sensitive measure of this task-related influence on word recognition as measured by the LDT
Monitoring of biomarkers in heart failure.
The role of biomarkers is increasingly recognized in heart failure (HF) management, for diagnosis, prognostication, and screening of high-risk patients. Beyond natriuretic peptides and troponins, the utility of novel, emerging biomarkers is less established. This document reflects the key points of a Heart Failure Association of the European Society of Cardiology (ESC) consensus meeting on biomarker monitoring in HF
Validation of open-surgery VR trainer
VREST (Virtual Reality Educational Surgical Tools) is developing a universal and\ud
autonomous simulation platform which can be used for training and assessment of\ud
medical students and for continuing education of physicians. With the VREST -\ud
Virtual Lichtenstein Trainer, simulating the open surgery procedure of the inguinal hernia repair according to Lichtenstein, the validation of the simulator is ongoing. Part of this trajectory is the evaluation of the transfer of training of the virtual incision making. One group of students trained incision making on the VREST platform where the control group did not. In an experiment both groups has to perform several incision tasks on a manikin. The results are not available yet but will be presented at the MMVR14 conference
Associations between the clinical signs of chronic endometritis with ovarian cysts and body condition loss in German Holstein Friesian cows
The objective of this retrospective field study was to associate the type and smell of discharge, the size of the uterus, the ovarian and treatment status, and the time to diagnosis of animals with chronic clinical endometritis (CCE) with the incidence of ovarian cysts and with a marked loss in body condition in German Holstein Friesian cows. Two hundred and sixty-four cows diagnosed with CCE from day 14 to day 42 postpartum participated in this study. In addition, 100 days milk production and the parity of the animals were included in the analysis. With the use of logistic regression, a purulent vaginal discharge (≥ 50% pus), the decision not to treat the animals for CCE and a high 100 days milk production proved to be significant factors for the incidence of ovarian cysts. Additionally, the type of discharge showed interactions with the parity and the smell of the discharge, as more animals with fetid and purulent discharge and more animals in the first lactation with a purulent discharge developed ovarian cysts. A high milk production and the parity showed associations with an excessive body condition score loss. Additionally, more animals with a diagnosis of an oversized uterus in comparison to cows with an early involution experienced a considerable reduction in their nutritional condition
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