keyword
MENU ▼
Read by QxMD icon Read
search

Processing speed

keyword
https://www.readbyqxmd.com/read/28738314/factors-associated-with-cognitive-impairment-in-a-cohort-of-older-homeless-adults-results-from-the-hope-home-study
#1
Emily Hurstak, Julene K Johnson, Lina Tieu, David Guzman, Claudia Ponath, Christopher T Lee, Christina Weyer Jamora, Margot Kushel
BACKGROUND: We evaluated cognitive function and factors associated with cognitive impairment in a cohort of older homeless adults. We hypothesized that substance use and a history of traumatic brain injury would be associated with cognitive impairment. METHODS: We recruited 350 homeless individuals aged ≥50 years using population-based sampling and conducted structured interviews and neuropsychological testing. We evaluated alcohol use with the Alcohol Use Disorder Identification Test, defining high-severity alcohol use as a total score ≥16 or ≥4 on the alcohol dependency sub-scale...
July 4, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28737747/a-spatially-localized-architecture-for-fast-and-modular-dna-computing
#2
Gourab Chatterjee, Neil Dalchau, Richard A Muscat, Andrew Phillips, Georg Seelig
Cells use spatial constraints to control and accelerate the flow of information in enzyme cascades and signalling networks. Synthetic silicon-based circuitry similarly relies on spatial constraints to process information. Here, we show that spatial organization can be a similarly powerful design principle for overcoming limitations of speed and modularity in engineered molecular circuits. We create logic gates and signal transmission lines by spatially arranging reactive DNA hairpins on a DNA origami. Signal propagation is demonstrated across transmission lines of different lengths and orientations and logic gates are modularly combined into circuits that establish the universality of our approach...
July 24, 2017: Nature Nanotechnology
https://www.readbyqxmd.com/read/28737705/emotion-recognition-from-chinese-speech-for-smart-affective-services-using-a-combination-of-svm-and-dbn
#3
Lianzhang Zhu, Leiming Chen, Dehai Zhao, Jiehan Zhou, Weishan Zhang
Accurate emotion recognition from speech is important for applications like smart health care, smart entertainment, and other smart services. High accuracy emotion recognition from Chinese speech is challenging due to the complexities of the Chinese language. In this paper, we explore how to improve the accuracy of speech emotion recognition, including speech signal feature extraction and emotion classification methods. Five types of features are extracted from a speech sample: mel frequency cepstrum coefficient (MFCC), pitch, formant, short-term zero-crossing rate and short-term energy...
July 24, 2017: Sensors
https://www.readbyqxmd.com/read/28737452/memory-rehabilitation-for-the-working-memory-of-patients-with-multiple-sclerosis-ms
#4
Shokoufeh Mousavi, Hossein Zare, Masoud Etemadifar, Hamid Taher Neshatdoost
OBJECTIVE: The main cognitive impairments in multiple sclerosis (MS) affect the working memory, processing speed, and performances that are in close interaction with one another. Cognitive problems in MS are influenced to a lesser degree by disease recovery medications or treatments,but cognitive rehabilitation is considered one of the promising methods for cure. There is evidence regarding the effectiveness of cognitive rehabilitation for MS patients in various stages of the disease...
July 24, 2017: Journal of Clinical and Experimental Neuropsychology
https://www.readbyqxmd.com/read/28737245/exteroceptive-stimuli-override-interoceptive-state-in-reaction-time-control
#5
Xiao Yang, J Richard Jennings, Bruce H Friedman
The processing of reaction time (RT) stimulus is modulated by its timing relative to the cardiac cycle. RT stimulus processing is also influenced by task-irrelevant stimuli: a sensory stimulus speeds RT when it accompanies a cue to react in another sensory modality. Different theories have been proposed to explain this accessory stimulus effect (ASE). However, it is unclear whether the ASE interacts with the cardiac timing effect. In the present study, the relationship of the ASE, cardiac timing, and stimulus valence was examined...
July 24, 2017: Psychophysiology
https://www.readbyqxmd.com/read/28736204/neural-stability-a-reflection-of-automaticity-in-reading
#6
Silvia Siu-Yin Lam, Travis White-Schwoch, Steven G Zecker, Jane Hornickel, Nina Kraus
Automaticity, the ability to perform a task rapidly with minimal effort, plays a key role in reading fluency and is indexed by rapid automatized naming (RAN) and processing speed. Yet little is known about automaticity's neurophysiologic underpinnings. The more efficiently sound is encoded, the more automatic sound processing can be. In turn, this automaticity could free up cognitive resources such as attention and working memory to help build an integrative reading network. Therefore, we hypothesized that automaticity and reading fluency correlate with stable neural representation of sounds, given a larger body of literature suggesting the close relationship between neural stability and the integrative function in the central auditory system...
July 20, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28736089/long-term-cognitive-impairment-and-delirium-in-intensive-care-a-prospective-cohort-study
#7
Marion L Mitchell, David H K Shum, Gabor Mihala, Jenny E Murfield, Leanne M Aitken
BACKGROUND: Whilst there is a growing body of research exploring the effect of delirium in intensive care unit (ICU) patients, the relationship between patient delirium and long-term cognitive impairment has not been investigated in settings where low rates of delirium have been reported. OBJECTIVES: To assess the association between the incidence of delirium, duration of mechanical ventilation and long term cognitive impairment in general ICU patients. METHODS: Prospective cohort study conducted in a tertiary level ICU in Queensland, Australia...
July 20, 2017: Australian Critical Care: Official Journal of the Confederation of Australian Critical Care Nurses
https://www.readbyqxmd.com/read/28736049/development-of-a-new-approach-based-on-midwave-infrared-spectroscopy-for-post-consumer-black-plastic-waste-sorting-in-the-recycling-industry
#8
Offer Rozenstein, Eldon Puckrin, Jan Adamowski
Waste sorting is key to the process of waste recycling. Exact identification of plastic resin and wood products using Near Infrared (NIR, 1-1.7µm) sensing is currently in use. Yet, dark targets characterized by low reflectance, such as black plastics, are hard to identify by this method. Following the recent success of Midwave Infrared (MWIR, 3-12µm) measurements to identify coloured plastic polymers, the aim of this study was to assess whether this technique is applicable to sorting black plastic polymers and wood products...
July 20, 2017: Waste Management
https://www.readbyqxmd.com/read/28735824/effect-of-qigong-exercise-on-cognitive-function-blood-pressure-and-cardiorespiratory-fitness-in-healthy-middle-aged-subjects
#9
Suphannika Ladawan, Kultida Klarod, Marc Philippe, Verena Menz, Inga Versen, Hannes Gatterer, Martin Burtscher
OBJECTIVE: To investigate effects of Qigong exercise on cognitive function, blood pressure and cardiorespiratory fitness in healthy middle-aged subjects. METHODS: Study part 1 examined the effects of Qigong exercise in 12 subjects (5 males, 7 females, aged 52.2±7.1years) who performed Qigong for 8 weeks (60min sessions, 3 times/week). Study part 2 evaluated the detraining effects 12 weeks after cessation of Qigong. Cognitive function (Digit Span Forward and Backward Test, Trail Making Tests part A and B), blood pressure, and exercise performance were determined at baseline, immediately after the training programme, and after the detraining period...
August 2017: Complementary Therapies in Medicine
https://www.readbyqxmd.com/read/28735586/cognitive-development-prior-to-onset-of-psychosis
#10
J Mollon, A Reichenberg
Schizophrenia patients commonly exhibit substantial and diffuse cognitive impairment. Evidence suggests that subtle cognitive deficits are already apparent in childhood and adolescence, many years prior to onset of psychosis. While there is almost unequivocal evidence of some degree of cognitive impairment in individuals who later develop schizophrenia, the literature remains inconclusive regarding the exact nature of this impairment and warrants careful review and interpretation. Meta-analytic findings suggest that individuals who later develop schizophrenia, but not related disorders, such as bipolar disorder, exhibit a premorbid IQ deficit of around 8 points...
July 24, 2017: Psychological Medicine
https://www.readbyqxmd.com/read/28734785/impact-of-magnetic-stirring-on-stainless-steel-integrity-effect-on-biopharmaceutical-processing
#11
Christopher Thompson, Kelly Wilson, Yoen Joo Kim, Min Xie, William K Wang, Michaela Wendeler
Stainless steel containers are widely used in the pharmaceutical and biopharmaceutical industry for the storage of buffers, process intermediates, and purified drug substance. They are generally held to be corrosion resistant, biocompatible, and non-reactive, although it is well established that trace amounts of metal ions can leach from stainless steel equipment into biopharmaceutical products. We report here that the use of stainless steel containers in conjunction with magnetic stirring bars leads to significantly aggravated metal contamination, consisting both of metal particles and significantly elevated metal ions in solution, the degree of which is several orders of magnitude higher than described for static conditions...
July 19, 2017: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28733049/the-time-course-of-attention-modulation-elicited-by-spatial-uncertainty
#12
Dan Huang, Huilou Liang, Linyan Xue, Meijian Wang, Qiyi Hu, Yao Chen
Uncertainty regarding the target location is an influential factor for spatial attention. Modulation in spatial uncertainty can lead to adjustments in attention scope and variations in attention effects. Hence, investigating spatial uncertainty modulation is important for understanding the underlying mechanism of spatial attention. However, the temporal dynamics of this modulation remains unclear. To evaluate the time course of spatial uncertainty modulation, we adopted a Posner-like attention orienting paradigm with central or peripheral cues...
July 18, 2017: Vision Research
https://www.readbyqxmd.com/read/28732991/in-situ-observation-of-ultrasonic-cavitation-induced-fragmentation-of-the-primary-crystals-formed-in-al-alloys
#13
Feng Wang, Iakovos Tzanakis, Dmitry Eskin, Jiawei Mi, Thomas Connolley
The cavitation-induced fragmentation of primary crystals formed in Al alloys were investigated for the first time by high-speed imaging using a novel experimental approach. Three representative primary crystal types, Al3Ti, Si and Al3V with different morphologies and mechanical properties were first extracted by deep etching of the corresponding Al alloys and then subjected to ultrasonic cavitation processing in distilled water. The dynamic interaction between the cavitation bubbles and primary crystals was imaged in situ and in real time...
November 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28732934/enhanced-crack-suppression-ability-of-hybrid-glass-fiber-reinforced-laminated-composites-fabricated-using-gnp-epoxy-system-by-optimized-udm-parameters
#14
Pannalal Choudhury, Sudipta Halder, Nazrul Islam Khan, Jialai Wang, Krishna Murari Pandey
In this work, GFRPs with layer-up [+22/-22/90n]s were prepared and hybridized with 0.5wt% of GNPs to introduce in-situ crack suppression ability. Optimization of the processing parameters of ultrasonic dual mode mixing (UDM) process was adopted to disperse GNPs uniformly in the epoxy system and place them evenly at the interfacial zones of GFRPs. Test results show that 102% and 153% enhancement in tensile strength and Young's modulus has been achieved by the proposed method. Low stirring speed and low pulse-off time show significant effect on properties of the GFRPs...
November 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28732798/the-effect-of-antipsychotic-medications-on-acoustic-startle-latency-in-schizophrenia
#15
Molly Fargotstein, Wendy Hasenkamp, Robin Gross, Bruce Cuthbert, Amanda Green, Lisette Swails, Barbara Lewison, William Boshoven, Megan Keyes, Erica Duncan
Prepulse inhibition of the acoustic startle reflex (PPI) is extensively studied as a biomarker of schizophrenia (SCZ); however, antipsychotic medication can confound the measure. Latency, the time between the startling stimulus and the reflexive eye blink, provides an index of neural processing speed and is 90% heritable. SCZ subjects have slower latency than controls (CON). This study examined the effects of antipsychotic medication on startle latency. 108 CON and 132 SCZ subjects in three medication subgroups (94 on second-generation antipsychotics (SGA), 25 on first-generation antipsychotics (FGA), 13 unmedicated (NoMed)) were tested on a standard acoustic startle paradigm designed to measure startle magnitude, PPI, and latency...
July 18, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28732757/multimodal-exercise-training-in-multiple-sclerosis-a-randomized-controlled-trial-in-persons-with-substantial-mobility-disability
#16
Brian M Sandroff, Rachel E Bollaert, Lara A Pilutti, Melissa L Peterson, Tracy Baynard, Bo Fernhall, Edward McAuley, Robert W Motl
BACKGROUND: Mobility disability is a common, debilitating feature of multiple sclerosis (MS). Exercise training has been identified as an approach to improve MS-related mobility disability. However, exercise randomized controlled trials (RCTs) on mobility in MS have generally not selectively targeted those with the onset of irreversible mobility disability. OBJECTIVES: The current multi-site RCT compared the efficacy of 6-months of supervised, multimodal exercise training with an active control condition for improving mobility, gait, physical fitness, and cognitive outcomes in persons with substantial MS-related mobility disability...
July 18, 2017: Contemporary Clinical Trials
https://www.readbyqxmd.com/read/28731870/the-association-of-cognitive-reserve-in-chronic-phase-functional-and-neuropsychological-outcomes-following-traumatic-brain-injury
#17
Jacob B Leary, Grace Y Kim, Catherine L Bradley, Uzma Z Hussain, Maryanne Sacco, Martha Bernad, John Collins, John Dsurney, Leighton Chan
OBJECTIVE: Examine the association of cognitive reserve (CR) factors (estimated premorbid intelligence quotient [IQ], years of education, and occupational attainment) and traumatic brain injury (TBI) severity with functional and neuropsychological outcomes 1 to 5 years following TBI. PARTICIPANTS: Patients with mild (N = 58), moderate (N = 25), or severe (N = 17) TBI. MAIN MEASURES: Cognitive reserve factors (estimated premorbid IQ, years of education, and occupational attainment); neuropsychological test battery; Glasgow Outcome Scale-Extended; Short Form-36 Health Survey...
July 20, 2017: Journal of Head Trauma Rehabilitation
https://www.readbyqxmd.com/read/28731574/rapid-buffer-and-ligand-screening-for-affinity-chromatography-by-multiplexed-surface-plasmon-resonance-imaging
#18
Karin P M Geuijen, Daniëlle E J W van Wijk-Basten, David F Egging, Richard B M Schasfoort, Michel H Eppink
Protein purifications are often based on the principle of affinity chromatography, where the protein of interest selectively binds to an immobilized ligand. The development of affinity purification requires selecting proper wash and elution conditions. In recent years, miniaturization of the purification process is applied to speed up the development (e.g. microtiterplates, robocolumns). We have studied the application of surface plasmon resonance imaging (SPRi) as a tool to simultaneously screen many buffer conditions for wash and elution steps in an affinity-based purification process...
July 21, 2017: Biotechnology Journal
https://www.readbyqxmd.com/read/28731452/temporal-order-of-alzheimer-s-disease-related-cognitive-marker-changes-in-blsa-and-wrap-longitudinal-studies
#19
Murat Bilgel, Rebecca L Koscik, Yang An, Jerry L Prince, Susan M Resnick, Sterling C Johnson, Bruno M Jedynak
Investigation of the temporal trajectories of currently used neuropsychological tests is critical to identifying earliest changing measures on the path to dementia due to Alzheimer's disease (AD). We used the Progression Score (PS) method to characterize the temporal trajectories of measures of verbal memory, executive function, attention, processing speed, language, and mental status using data spanning normal cognition, mild cognitive impairment, and AD from 1,661 participants with a total of 7,839 visits (age at last visit 77...
July 18, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28731362/greater-cognitive-deficits-with-sleep-disordered-breathing-among-individuals-with-genetic-susceptibility-to-alzheimer-s-disease-the-multi-ethnic-study-of-atherosclerosis
#20
Dayna A Johnson, Jacqueline Lane, Rui Wang, Michelle Reid, Ina Djonlagic, Annette L Fitzpatrick, Stephen R Rapp, Luenda E Charles, Ruth O'Hara, Richa Saxena, Susan Redline
RATIONALE: There are conflicting findings regarding the link between sleep apnea and cognitive dysfunction. OBJECTIVE: Investigate associations between indicators of sleep-disordered breathing (SDB) and cognitive function in the Multi-Ethnic Study of Atherosclerosis and assess effect modification by the apolipoprotein ε-4 (APOE-ε4) allele. METHODS: A diverse population (N=1,752) underwent Type 2 in-home polysomnography, which included measurement of % sleep time <90% oxyhemoglobin saturation (%Sat<90%) and apnea-hypopnea index (AHI)...
July 21, 2017: Annals of the American Thoracic Society
keyword
keyword
85192
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"