CRN

CRN
  • 文章类型: Journal Article
    我们检查数学焦虑是否与算术任务中的反应监控改变有关。在执行算术验证任务时,对23名高度(HMA)和23名低数学焦虑(LMA)个体进行了响应锁定事件相关脑电位(ERP)评估。我们专注于在错误处理过程中引起的两个广泛研究的ERP:与错误相关的负性(ERN)和错误阳性(Pe)。正确相关的消极(CRN),在正确的反应后引发的ERP,也被研究过。发现以下错误的预期ERN,但是各组的振幅没有差异。重要的是,与焦虑的同龄人相比,LMA个体表现出更少的负CRN和更多的正Pe振幅,建议在LMA组的算术任务中犯错误后,对响应准确性和更好的适应性行为调整更确定。在HMA组中,对反应表现的控制较差,对正确反应的认识较少,可能会降低他们“从错误中学习”的能力。
    We examine whether math anxiety is related to altered response monitoring in an arithmetic task. Response-locked event-related brain potentials (ERPs) were evaluated in 23 highly (HMA) and 23 low math-anxious (LMA) individuals while they performed an arithmetic verification task. We focused on two widely studied ERPs elicited during error processing: error-related negativity (ERN) and error positivity (Pe). Correct-related negativity (CRN), an ERP elicited after a correct response, was also studied. The expected ERN following errors was found, but groups did not differ in its amplitude. Importantly, LMA individuals showed less negative CRN and more positive Pe amplitudes than their more anxious peers, suggesting more certainty regarding response accuracy and better adaptive behavioral adjustment after committing errors in an arithmetic task in the LMA group. The worse control over response performance and less awareness of correct responses in the HMA group might reduce their ability to \'learn from errors\'.
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  • 文章类型: Journal Article
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  • 文章类型: Journal Article
    氮化铬(CrN)涂层在许多工业应用中广泛使用,主要归功于其优异的性能。在CrN涂层合成的不同方法中,直流磁控溅射(DCMS)是目前应用的主流技术。尽管如此,随着CrN涂层应用的扩大,同时,对增强机械性能的需求也在不断升级。高功率脉冲磁控溅射(HiPIMS),一种创新的涂层沉积方法在过去的三十年中发展起来,因其产生具有卓越机械属性的涂层的能力而获得认可,从而引起了重大的研究兴趣。考虑到涂层的机械性能从根本上取决于其微观结构性能,提出了通过这两种技术制造的CrN涂层的全面综述。这篇对最新文献的综述旨在对DCMS和HiPIMS进行深入的比较,然后检查通过这两种技术制造的CrN涂层的微观结构。此外,揭示了在CrN涂层中观察到的导致机械性能差异的潜在因素的探索。讨论了对HiPIMS的优势和潜在缺点的评估,提供对CrN涂层制造的洞察。
    Chromium Nitride (CrN) coatings have widespread utilization across numerous industrial applications, primarily attributed to their excellent properties. Among the different methods for CrN coating synthesis, direct current magnetron sputtering (DCMS) has been the dominant technique applied. Nonetheless, with the expanded applications of CrN coatings, the need for enhanced mechanical performance is concurrently escalating. High-power impulse magnetron sputtering (HiPIMS), an innovative coating deposition approach developed over the past three decades, is gaining recognition for its capability of yielding coatings with superior mechanical attributes, thereby drawing significant research interest. Considering that the mechanical performance of a coating is fundamentally governed by its microstructural properties, a comprehensive review of CrN coatings fabricated through both techniques is presented. This review of recent literature aims to embark on an insightful comparison between DCMS and HiPIMS, followed by an examination of the microstructure of CrN coatings fabricated via both techniques. Furthermore, the exploration of the underlying factors contributing to the disparities in mechanical properties observed in CrN coatings is revealed. An assessment of the advantages and potential shortcomings of HiPIMS is discussed, offering insight into CrN coating fabrication.
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  • 文章类型: Journal Article
    硬涂层可以应用到微结构模具上,以影响磨损,微注射成型中的成型填充和脱模行为。作为这种传统制造过程的替代方案,在这项研究中,研究了物理气相沉积(PVD)硬质涂层的“直接处理”,例如,通过将亚微米特征直接制造到涂层中,用于通过模制进行后续复制。使用显微镜成像和表面粗糙度测量,研究了不同的类金刚石碳(DLC)和氮化铬(CrN)PVD涂层对聚焦离子束(FIB)铣削和微注射成型的适用性。将每种涂层类型沉积到高光泽抛光的模具插入物上。然后使用变化的FIB参数将包含不同亚微米特征的特定测试图案FIB研磨成涂层。发现铣削结果受涂层形貌和晶粒微观结构的影响。使用注射压缩成型,亚微米结构被模制到聚碳酸酯(PC)和环烯烃聚合物(COP)上。成型结果揭示了所研究的涂层和聚合物的成型性能。对于CrN和PC,基于AFM测量,实现了足够的复制保真度。相比之下,DLC只能获得不足的成型结果。成型后未发现磨料磨损或涂层分层。
    Hard coatings can be applied onto microstructured molds to influence wear, form filling and demolding behaviors in microinjection molding. As an alternative to this conventional manufacturing procedure, \"direct processing\" of physical-vapor-deposited (PVD) hard coatings was investigated in this study, by fabricating submicron features directly into the coatings for a subsequent replication via molding. Different diamondlike carbon (DLC) and chromium nitride (CrN) PVD coatings were investigated regarding their suitability for focused ion beam (FIB) milling and microinjection molding using microscope imaging and areal roughness measurements. Each coating type was deposited onto high-gloss polished mold inserts. A specific test pattern containing different submicron features was then FIB-milled into the coatings using varied FIB parameters. The milling results were found to be influenced by the coating morphology and grain microstructure. Using injection-compression molding, the submicron structures were molded onto polycarbonate (PC) and cyclic olefin polymer (COP). The molding results revealed contrasting molding performances for the studied coatings and polymers. For CrN and PC, a sufficient replication fidelity based on AFM measurements was achieved. In contrast, only an insufficient molding result could be obtained for the DLC. No abrasive wear or coating delamination could be found after molding.
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  • 文章类型: Journal Article
    已知测量参数可以显著影响由原子探针断层摄影(APT)确定的元素组成。特别是通过激光辅助APT获得的结果表明,激光脉冲能量对表观元素组成有很强的影响。在这项研究中,激光辅助APT实验是在Cr0.51N0.49和热更稳定(Cr0.47Al0.53)0.49N0.51上进行的,比较了两种不同的基础温度(即15和60K),激光波长(即532和355nm)和系统修改的激光脉冲能量。将来自激光辅助APT的绝对化学成分与从离子束分析获得的数据进行比较。当激光脉冲能量对于两个激光波长都增加时,推导出的CrN元素组成显示出Cr含量的显着增加。对于低激光脉冲能量Cr,CrN,确定了N和N2离子,在较高的激光脉冲能量下,检测到的Cr离子的数量增加,而N离子的数量急剧下降。Further,在更高的脉冲能量下观察到以CrN为代价的更复杂的含Cr离子如Cr2N的检测增加。在这项工作中使用的最高脉冲能量水平下,得到的Cr含量>80原子%,主要由检测到的元素Cr离子的量。随着激光脉冲能量的增加,检测到的离子的质谱的变化提供了证据,表明高激光脉冲能量在APT测量过程中会引发CrN的分解。与已知的热分解路径一致,进入Cr2N,随后进入Cr和气态N。相反,对于热更稳定的CrAlN,激光脉冲能量的变化仅导致Cr的轻微增加,并且随着激光脉冲能量的增加,Al和N的浓度降低,并且检测到的离子类型没有变化。总之,在目前的研究中,首次报道了激光辅助APT引起的低热稳定性涂层材料的分解,强调为亚稳态材料选择合适的测量参数的重要性,容易热分解。
    It is known that measurement parameters can significantly influence the elemental composition determined by atom probe tomography (APT). Especially results obtained by laser-assisted APT show a strong effect of the laser pulse energy on the apparent elemental composition. Within this study laser-assisted APT experiments were performed on Cr0.51N0.49 and thermally more stable (Cr0.47Al0.53)0.49N0.51, comparing two different base temperatures (i.e. 15 and 60 K), laser wavelengths (i.e. 532 and 355 nm) and systematically modified laser pulse energies. Absolute chemical compositions from laser-assisted APT were compared to data obtained from ion beam analysis. The deduced elemental composition of CrN exhibited a strong increase of the Cr content when the laser pulse energy was increased for both laser wavelengths. For low laser pulse energies Cr, CrN, N and N2 ions were identified, while the amount of detected Cr ions increased and the amount of N ions strongly decreased at higher laser pulse energies. Further, increased detection of more complex Cr-containing ions such as Cr2N at the expense of CrN was observed at higher pulse energies. At the highest pulse energy levels used within this work, the resulting Cr content was > 80 at%, dominated by the amount of detected elemental Cr ions. The change of the mass spectrum of the detected ions with increasing laser pulse energy provides evidence that high laser pulse energies initiate the decomposition of CrN during the APT measurement, consistent with the known thermal decomposition path into Cr2N and subsequently into Cr and gaseous N. In contrast, variation of the laser pulse energy for the thermally more stable CrAlN resulted only in a slight increase of Cr and a decrease of the resulting concentrations of Al and N with increasing laser pulse energy and no change in the type of detected ions. In conclusion, within the present study, the decomposition of a coating material with low thermal stability induced by laser-assisted APT was reported for the first time, emphasizing the importance of the selection of suitable measurement parameters for metastable materials, which are prone to thermal decomposition.
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  • 文章类型: Journal Article
    本研究旨在评估非酒精性脂肪性肝病(NAFLD)与结直肠肿瘤(CRN)之间的潜在关联。PubMed,科克伦图书馆,和Embase进行了队列研究。选择后纳入14项队列研究,总人口38,761,773人,进行荟萃分析。结果显示NAFLD与CRN风险增加有关(OR=1.23;95%CI:1.14-1.32;I2=70.7%,p<0.001)。在亚组分析中,NAFLD是结直肠腺瘤(CRA)(OR=1.29;95%CI=1.15~1.45;I2=66.4%)和结直肠癌(CRC)(OR=1.13;95%CI=1.12~1.15;I2=69.4%)的独立危险因素。NAFLD患者的吸烟状况与CRN之间没有密切关系。有趣的是,生物信息学分析显示,在NAFLD中存在失调的基因集重叠,CRC,和最近发现的两种受调节的细胞死亡类型,铁性凋亡和角化凋亡,分别。我们的元和生物信息学分析表明,NAFLD增加了CRN的风险。Ferroptosis和culproptosis可能是NAFLD和CRN之间的关键环节,分别。这些发现支持NAFLD有必要被视为CRN的新兴风险因素。
    This study aims at assessing the potential association between non-alcoholic fatty liver disease (NAFLD) and colorectal neoplasms (CRN). PubMed, Cochrane Library, and Embase were searched for cohort studies. 14 cohort studies with a total population of 38,761,773 were included for meta-analysis after selection. The results showed that NAFLD is related to an increased risk of CRN (OR = 1.23; 95% CI: 1.14-1.32; I2 = 70.7%, p < 0.001). In the subgroup analysis, NAFLD were found to be the independent risk factor of colorectal adenoma (CRA) (OR = 1.29; 95% CI = 1.15-1.45; I2 = 66.4%) and colorectal cancer (CRC) (OR = 1.13; 95% CI = 1.12-1.15; I2 = 69.4%). There is no close correlation between smoking status of NAFLD patients and CRN. Interestingly, bioinformatics analysis revealed that there were overlap of dysregulated gene sets among NAFLD, CRC, and two recently identified regulated cell death types, ferroptosis and cuproptosis, respectively. Our meta- and bioinformatics analysis shows that NAFLD increases the risk of CRN. Ferroptosis and cuproptosis may be the critical links between NAFLD and CRN, respectively. These findings here support that NAFLD is necessary to be considered as an emerging risk factor for CRN.
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  • 文章类型: Journal Article
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  • 文章类型: Journal Article
    卵菌形成真菌样真核微生物的独特系统发育谱系,其中数百种生物被认为是最具破坏性的植物病原体,尤其是疫霉属的成员。疫霉。具有大量的效应子,有助于在寄主植物中引起易感反应。越来越感兴趣的是疫霉效应子参与调节程序性细胞死亡(PCD)-特别是,过敏反应.已经有许多功能表征研究,证明疫霉效应子诱导或抑制宿主细胞死亡,这可能在疫霉调节其半生物营养生活方式的能力中起着至关重要的作用。尽管用于识别和表征疫霉效应物的技术取得了一些进展,一些重要物种仍然缺乏知识,包括肉桂疫霉.这篇综述讨论了术语PCD的含义以及植物中PCD的致病和发育形式之间的知识差距。我们还讨论了细胞死亡在疫霉毒力中的作用。以及迄今为止被确定为在细胞死亡操纵中起作用的效应物。最后,我们谈到了研究效应器功能的不同技术,如细胞死亡诱导/抑制。
    Oomycetes form a distinct phylogenetic lineage of fungus-like eukaryotic microorganisms, of which several hundred organisms are considered among the most devastating plant pathogens-especially members of the genus Phytophthora. Phytophthora spp. have a large repertoire of effectors that aid in eliciting a susceptible response in host plants. What is of increasing interest is the involvement of Phytophthora effectors in regulating programed cell death (PCD)-in particular, the hypersensitive response. There have been numerous functional characterization studies, which demonstrate Phytophthora effectors either inducing or suppressing host cell death, which may play a crucial role in Phytophthora\'s ability to regulate their hemi-biotrophic lifestyle. Despite several advances in techniques used to identify and characterize Phytophthora effectors, knowledge is still lacking for some important species, including Phytophthora cinnamomi. This review discusses what the term PCD means and the gap in knowledge between pathogenic and developmental forms of PCD in plants. We also discuss the role cell death plays in the virulence of Phytophthora spp. and the effectors that have so far been identified as playing a role in cell death manipulation. Finally, we touch on the different techniques available to study effector functions, such as cell death induction/suppression.
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  • 文章类型: Journal Article
    目的:“亚综合征”强迫症症状(OCDS)很常见,会导致心理社会功能受损。OCDS可以通过心理病理学的维度模型更好地捕获,而不是分类诊断。然而,这种维度方法需要对潜在的神经认知驱动因素以及冲动和强迫特征有深刻的理解(即,神经认知表型)跨症状。这项研究调查了冲动性的抑制控制和自我监测,强迫性,以及它们在经历轻度-中度OCDS的个体(n=40)中的相互作用。
    方法:脑电图记录与停止信号任务同时用于引出事件相关电位(ERPs)索引抑制控制(即,N2和P3)和自我监测(即,错误相关的消极和正确相关的消极(CRN):错误或正确的反应后的消极,分别)。
    结果:在不成功的停止过程中,冲动性和强迫性高的个体表现出增强的N2振幅,指示反应的冲动和需要停止之间的冲突(F(3,33)=1.48,P<.05,95%Cl[-0.01,0.001])。强迫性高和冲动性低的个体显示出降低的P3振幅,与监测失败的抑制控制中的损伤一致(F(3,24)=2.033,P<.05,95%CI[-0.002,0.045])。成功停止后,高强迫性(与冲动性无关)与较低的CRN振幅相关,反映了对正确反应的低监测(F(4,32)=4.76,P<.05,95%CI[0.01,0.02]),并且OCDS严重程度更高(F(3,36)=3.32,P<.05,95%CI[0.03,0.19])。
    结论:当前的发现为差异提供了证据,OCDS中脉冲和强迫性表型的ERP索引抑制控制和自我监测概况。
    \"Subsyndromal\" obsessive-compulsive disorder symptoms (OCDSs) are common and cause impaired psychosocial functioning. OCDSs are better captured by dimensional models of psychopathology, as opposed to categorical diagnoses. However, such dimensional approaches require a deep understanding of the underlying neurocognitive drivers and impulsive and compulsive traits (ie, neurocognitive phenotypes) across symptoms. This study investigated inhibitory control and self-monitoring across impulsivity, compulsivity, and their interaction in individuals (n = 40) experiencing mild-moderate OCDSs.
    EEG recording concurrent with the stop-signal task was used to elicit event-related potentials (ERPs) indexing inhibitory control (ie, N2 and P3) and self-monitoring (ie, error-related negativity and correct-related negativity (CRN): negativity following erroneous or correct responses, respectively).
    During unsuccessful stopping, individuals high in both impulsivity and compulsivity displayed enhanced N2 amplitude, indicative of conflict between the urge to respond and need to stop (F(3, 33) = 1.48, P < .05, 95% Cl [-0.01, 0.001]). Individuals high in compulsivity and low in impulsivity showed reduced P3 amplitude, consistent with impairments in monitoring failed inhibitory control (F(3, 24) = 2.033, P < .05, 95% CI [-0.002, 0.045]). Following successful stopping, high compulsivity (independent of impulsivity) was associated with lower CRN amplitude, reflecting hypo-monitoring of correct responses (F(4, 32) = 4.76, P < .05, 95% CI [0.01, 0.02]), and with greater OCDS severity (F(3, 36) = 3.32, P < .05, 95% CI [0.03, 0.19]).
    The current findings provide evidence for differential, ERP-indexed inhibitory control and self-monitoring profiles across impulsive and compulsive phenotypes in OCDSs.
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  • 文章类型: Journal Article
    Cognitive control is flexibly adapted to task requirements in healthy individuals. Medio-frontal negativities in the event-related potential of the electroencephalogram can serve as indicators of cognitive control. With increasing conflict frequency, stimulus-locked control, as indexed by the N2, is increased and response-locked control, as indexed by the correct-related negativity, is reduced. On the behavioral level, this shift is associated with improved conflict resolution as evident in reduced response times and error rates in incompatible trials and a reduced response time congruency effect. Cognitive control adaptation might be implemented through experience-based task sets specifying advantageous processing strategies. Here, we investigated whether the cognitive control task set will be sustained when coupled with a contextual cue, even when the initial task requirements are no longer present. A flanker task with two conflict frequency conditions (25% incompatible and 75% incompatible trials) was presented. In the training phase, the conflict frequency conditions were paired with a distinct context cue (i.e., background color). In the test phase, the previously associated cues were again presented, but conflict frequency was identical in both conditions (50% incompatible trials). Although typical cognitive control adaptation was observed in the training phase on the behavioral and event-related potentials level, this pattern was not sustained in the test phase. Thus, the present study provides further evidence that cognitive control is flexibly adapted to task requirements even in the presence of misleading cues.
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