TKL Research

The use of modern pendulum impact testers capable of recording specimen deformation curve during loading has made it possible to consider the impact bending test not only as a standard type of technological acceptance test for assessing metal quality in accordance with regulatory requirements. Recording curves in force-displacement coordinates provide an additional opportunity to obtain a more objective assessment of metal fracture resistance, and also generally expands the understanding of the fracture mechanism, especially in the transition temperature range. In this regard, it is of interest to analyze dynamic impact bending curves to obtain information about the nature of fracture, in particular about the quantitative ratio of ductile and brittle components in the fracture surface. In this study, using the example of steel grades 06GFBA, 26KhMFA and 35KhGMA, developed as a material for oil and gas pipes, it is experimentally shown that using force values at characteristic points on a pre- smoothed dynamic impact loading curve allows for a high-accuracy determination of the shear fracture appearance (SFA) by the evaluation method without visual analysis of the fracture surfaces of the failed specimens. Research has shown that the brittle component in the fracture occurs at the moment a sharp drop appears on the curve while the magnitude of the specimen deflection characterizes its resistance to the initiation and growth of a brittle crack during fracture. Temperature dependency of characteristic force and displacement values is determined. The pronounced dependence of the parameters of the impact bending curve on the test temperature can serve as a qualitative indicator for identifying incorrectly determined characteristic point values. Ductile-to-brittle transition curve is plotted by fitting calculated SFA values and ductile-to-brittle transition temperature is obtained. A comparison of ductile-to-brittle transition curves constructed from proposed and experimental (fractographic measurement) SFA data showed similar values of the ductile-to-brittle transition temperature. This confirms the possibility of using the proposed method for rapid and qualitative assessment with satisfactory approximation, especially when dealing with a large number of specimens, and also as an additional control method during acceptance tests.

An essential element of enterprise economics and management is planning, which involves establishing standardized and target values to stimulate the efficiency of business processes. The article examines the genesis of the development and improvement of the calculation-analytical method for forming planned norms and standards within the system of material resource rationing. The current components of the mathematical model for metal rationing are described in detail. The basis for evaluating practical implementation aspects is the experience of JSC RUSNITI (Russian Research Institute for the Tube and Pipe Industry) in developing tools for scientifically and technically justified management of material resource (metal) consumption during the production of seamless hot-rolled pipes at the FQM (Fine Quality Mill) tube-rolling unit. The results of implementation are presented, including an improved rationing process achieved through in-depth differentiation of the calculation of specific components of the metal consumption coefficient. It is asserted that the development and implementation of rationing tools enhance business processes, particularly planning and resource conservation management.

The exponential growth of digital media content has created unprecedented challenges in content discovery, organization, and personalization.This article explores the implementation and impact of AI-driven automated metadata enrichment systems in modern media platforms.This article comprehensively analyzes how advanced machine learning techniques-including computer vision, natural language processing, and sentiment analysis-are revolutionizing automated tagging and categorizing media content at scale.This article covers the technical architecture of these systems, examining their core components, processing pipelines, and integration patterns with existing content management infrastructure.Through empirical analysis and industry case studies, this article demonstrates that automated metadata Shailin Saraiya https://iaeme

AZRBAYCAN DLL YRNCLR NGLS DL LEKSKASININ YRDLMS: tinliklr

BackgroundDigital therapeutics (DTx) have attracted attention as the substitutes or add-ons to conventional pharmacotherapy and the number of DTx products authorized with the regulatory reviews of the clinical evidence is increasing. Insomnia is one of the major targets of the DTx due to the benefit from cognitive behavioral interventions and several products have been launched in the market with regulatory reviews. However, common features of the products and the clinical evidence required by each regulatory agency have not been investigated.MethodsIn this study, we identified the DTx products with the primary indication of insomnia authorized with regulatory reviews of clinical evidence by literature and website searches, and investigated the common features of the products and of the study designs for the pivotal clinical trials.ResultsThe total of 6 DTx products were identified. The components of cognitive behavioral therapy for insomnia (CBT-I) were identified as common features of the products. All the pivotal clinical trials were randomized, parallel-group, blind studies against insomnia patients. No products have been authorized in multiple countries regardless of the similarity of the features of the products and of the study designs for the pivotal clinical trials.ConclusionsOur study revealed that the components of CBT-I and gold standard design in pivotal clinical trials were adopted in all the DTx products for insomnia authorized with reviews of clinical evidence. At the same time, our findings suggest the needs of internationally harmonized regulatory review and authorization system to facilitate the early patient access to the promising DTx products.

Blue quantum dot (QD) light emitting diode (QLED) developments are far lagging behind the red and green ones as it becomes difficult to balance charge injection and photo stability than the latter. Here, we introduced a combination of a low band energy shell with better surfactants, which largely meet both abovementioned requirements. Our simulation pinpoints that it is the exposed Se on the QD surface, which causes non-radiative relaxations. By adding tributyl phosphine (TBP), which is a good ligand to Se, we recover photoluminescence quantum yield (PLQY) from less than 8.0% up to above 85.0%. The corresponding external quantum efficiency (EQE) of QLEDs increases from 3.1% to 10.1%. This demonstrates that the low bandgap shell with effective surfactant passivation is a promising strategy to enhance QLED performance.

The elevation of kynurenic acid (KYNA) observed in schizophrenic patients may contribute to core symptoms arising from glutamate hypofunction, including cognitive impairments. Although increased KYNA levels reduce excitatory neurotransmission, KYNA has been proposed to act as an endogenous antagonist at the glycine site of the glutamate NMDA receptor (NMDAR) and as a negative allosteric modulator at the α7 nicotinic acetylcholine receptor. Levels of KYNA are elevated in CSF and the postmortem brain of schizophrenia patients, and these elevated levels of KYNA could contribute to NMDAR hypofunction and the cognitive deficits and negative symptoms associated with this disease. However, the impact of endogenously produced KYNA on brain function and behavior is less well understood due to a paucity of pharmacological tools. To address this issue, we identified PF-04859989, a brain-penetrable inhibitor of kynurenine aminotransferase II (KAT II), the enzyme responsible for most brain KYNA synthesis. In rats, systemic administration of PF-04859989 dose-dependently reduced brain KYNA to as little as 28% of basal levels, and prevented amphetamine- and ketamine-induced disruption of auditory gating and improved performance in a sustained attention task. It also prevented ketamine-induced disruption of performance in a working memory task and a spatial memory task in rodents and nonhuman primates, respectively. Together, these findings support the hypotheses that endogenous KYNA impacts cognitive function and that inhibition of KAT II, and consequent lowering of endogenous brain KYNA levels, improves cognitive performance under conditions considered relevant for schizophrenia.

Phase 1 studies were conducted to determine the sensitization (PEP005-005; NCT00357916; http://clinicaltrials.gov/ct2/show/NCT00357916), photoirritation (PEP005-023; NCT00850811; http://clinicaltrials.gov/ct2/show/NCT00850811?term=PEP005-023&rank=1), and photoallergic (photosensitizing) potential (PEP005-024; NCT00850681; http://clinicaltrials.gov/ct2/show/NCT00850681?term=PEP005-024&rank=1) of ingenol mebutate gel 0.01% versus vehicle on normal skin. Healthy volunteers were enrolled in single-center, randomized, controlled, within-subject comparison trials. PEP005-005 was designed as a repeat-insult patch test study. In PEP005-023, treatment areas were examined after irradiation for photoirritation potential; dermal reactions were evaluated. In PEP005-024, irradiation was performed to determine the photoallergic (photosensitizing) potential of the medication. All treatment areas were graded immediately prior to irradiation and 24, 48, and 72 hours following irradiation. In all studies, local tolerability was assessed visually using an ordinal scoring system at set intervals before and after medication application/irradiation. In PEP005-005 (n=238), a significant difference (p<0.001) was seen between ingenol mebutate and vehicle for mean and total cumulative irritation scores. In PEP005-023 (n=34), mild erythema in all irradiated treatment areas was as expected for the ultraviolet dose. There was no clinically significant irritation in response to ingenol mebutate or vehicle, irrespective of irradiation. In PEP005-024 (n=60), there was no significant irritation in response to either ingenol mebutate or vehicle at their irradiated treatment areas. RESULTS from three pharmacology studies in healthy volunteers indicate a favorable topical safety profile for ingenol mebutate gel, with no evidence seen of skin sensitization, photoirritation, or photoallergic potential.

This study examined the association between screen media use, media content, and language development among 119 Hispanic infants and toddlers. Children and their caregivers were recruited through an urban, Early Head Start program. Duration and content of screen media exposure was measured through a 24-hour recall questionnaire, and language development was measured at baseline and at 1-year follow up. Children in the sample spent an average of 3.29 hours engaged with screen media (median 2.5 hours per day). In both cross-sectional and longitudinal analyses, children who watched over 2 hours of television per day had increased odds of low communication scores. Whereas child-directed media was associated with low language scores, adult-directed media was not. Our findings support the mounting literature on the deleterious impacts of screen media in toddler's language development. Guidance and alternatives to screen media use should be available to families in pediatric practices and early childhood centers.