We report a CCSD(T)/cc-pCV5Z quartic force field (QFF) and a semi-global CCSD(T)-F12b/aug-cc-pVTZ potential energy surface (PES) for singlet, cyclic C4. Vibrational fundamentals, combinations, and overtones are obtained using vibrational second-order perturbation theory (VPT2) and the vibrational configuration-interaction (VCI) approach. Agreement is within 10 cm(-1) between the VCI calculated ...

Advances in our understanding of vascular cognitive impairment (VCI) have springboarded from further elucidation of the role of vascular risk factors, surgical procedures, medications, and neuroimaging studies that are related to this condition. The main focus of this VCI review will highlight the relation of diabetes mellitus and hippocampal dysfunction in VCI; coronary artery bypass surgery a...

BACKGROUND Vascular cognitive impairment (VCI) has superseded vascular dementia and multi-infarct dementia as the concept to be used in cognitive decline due to cerebrovascular disease. METHOD The literature was reviewed with regard to the concept of VCI and its incidence, pathophysiological substrate, clinical features and management. RESULTS A change in the diagnostic paradigm from the cu...

In the last years, there has been a significant growth in the literature exploiting transcranial magnetic stimulation (TMS) with the aim at gaining further insights into the electrophysiological and neurochemical basis underlying vascular cognitive impairment (VCI). Overall, TMS points at enhanced brain cortical excitability and synaptic plasticity in VCI, especially in patients with overt deme...

BACKGROUND We examined the clinical significance of pregnancies complicated by velamentous cord insertion (VCI) associated with other umbilical cord/placental abnormalities. METHODS Data were collected from 168 deliveries complicated by VCI and from 16,797 unaffected controls. All placentae were screened identically by trained staff. In this study, we examined the presence of excessively long...

BACKGROUND The predictive ability of National Institute of Neurological Disease and Stroke-Canadian Stroke Network (NINDS-CSN) 5-minute protocol and Montreal Cognitive Assessment (MoCA) administered sub-acutely and at the convalescent phase after stroke for significant vascular cognitive impairment (VCI) at 1 year is unknown. We compared prognostic values of these tests. METHODS Patients with...

Precise assessment of drought and its impact on the natural ecosystem is an arduous task in regions with limited climatic observations due to sparsely distributed situ stations, especially hyper-arid region Kingdom Saudi Arabia (KSA). Therefore, this study investigates application remote sensing techniques monitor compare sensing-retrieved indices (RSDIs) standardized meteorological index (Stan...

BACKGROUND Vascular cognitive impairment (VCI) is a complex spectrum encompassing post-stroke cognitive impairment (PSCI) and small vessel disease-related cognitive impairment. Despite the growing health, social, and economic burden of VCI, to date, no specific treatment is available, prompting the introduction of the concept of a disease modifier. CONSENSUS AND SUGGESTIONS Within this clinic...

The performance of an integrated architecture for full-duplex IP-over-ATM processing is evaluated through detailed simulation. The architecture combines processing, memory, and multiple direct-memory-access engines for single-chip implementation. The simulation models the segmentation and reassembly operations needed to translate IP frames to and from a fixed ATM cell size. A key operation is t...

BACKGROUND AND PURPOSE Since the Vascular Cognitive Impairment Harmonization Standards (VCIHS) neuropsychological test protocol was proposed by the National Institute of Neurological Disorders and Stroke and Canadian Stroke Network, no studies have applied this neuropsychological protocol to poststroke survivors in a large-scale, multicenter stroke cohort. We determined the frequency of vascula...