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Results 1 - 10
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836
A generalized Gaussian image model for edge-preserving MAP estimation
- IEEE Trans. on Image Processing
, 1993
"... Absfrucf- We present a Markov random field model which allows realistic edge modeling while providing stable maximum a posteriori MAP solutions. The proposed model, which we refer to as a generalized Gaussian Markov random field (GGMRF), is named for its similarity to the generalized Gaussian distri ..."
Abstract
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Cited by 301 (37 self)
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at the unique global mini-mum of the U posteriori log-likeihood function. The GGMRF is demonstrated to be useful for image reconstruction in low-dosage transmission tomography. I.
Efficiency and cost of economical brain functional networks
- PLOS COMP BIOL 2007
, 2007
"... Brain anatomical networks are sparse, complex, and have economical small-world properties. We investigated the efficiency and cost of human brain functional networks measured using functional magnetic resonance imaging (fMRI) in a factorial design: two groups of healthy old (N 11; mean age 66.5 ye ..."
Abstract
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Cited by 168 (4 self)
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localised and did not interact with the effect of age. Brain functional networks have economical small-world properties—supporting efficient parallel information transfer at relatively low cost—which are differently impaired by normal aging and pharmacological blockade of dopamine transmission.
Hypotheses linking cannabis and psychosis
"... Cannabis, synthetic cannabinoids, and psychosis risk: What the evidence says Research suggests marijuana may be a ‘component cause’ of psychosis Over the past 50 years, anecdotal reports linking cannabis sativa (marijuana) and psychosis have been steadily accumulating, giving rise to the notion of “ ..."
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on marijuana’s impact on the risk of developing psychotic disorders, as well as the potential contributions of “medical ” marijuana and other legally available products containing synthetic cannabinoids to psychosis risk. © Ikon Images/Corbis Cannabis use and psychosis Cannabis use has a largely deleterious
Does the antibacterial activity of silver nanoparticles depend on the shape of the nanoparticle? A study of the Gram-negative bacterium Escherichia coli
- Appl. Environ. Microbiol
, 2007
"... In this work we investigated the antibacterial properties of differently shaped silver nanoparticles against the gram-negative bacterium Escherichia coli, both in liquid systems and on agar plates. Energy-filtering trans-mission electron microscopy images revealed considerable changes in the cell me ..."
Abstract
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Cited by 98 (0 self)
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In this work we investigated the antibacterial properties of differently shaped silver nanoparticles against the gram-negative bacterium Escherichia coli, both in liquid systems and on agar plates. Energy-filtering trans-mission electron microscopy images revealed considerable changes in the cell
Reaching out towards cannabis: approachbias in heavy cannabis users predicts changes in cannabis use
- Addiction
, 2011
"... Aims Repeated drug exposure can lead to an approach-bias, i.e. the relatively automatically triggered tendencies to approach rather that avoid drug-related stimuli. Ourmain aimwas to study this approach-bias in heavy cannabis users with the newly developed cannabis Approach Avoidance Task (cannabis- ..."
Abstract
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Cited by 6 (4 self)
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-bias for cannabis images, as compared to controls. The approach-bias predicted changes in cannabis use at six-month follow-up. The pre-test MCQ emotionality and expectancy factor were associated negatively with the approach-bias. No effects were found on levels of cannabis dependence. Conclusions Heavy cannabis
Imaging dopamine transmission in the frontal cortex: a simultaneous microdiaysis and [11C]FLB 457 PET study
"... In a recent human PET study we demonstrated the ability to detect amphetamine-induced dopamine release in the prefrontal cortex as a reduction in the binding of the dopamine D2/3 radioligand [11C]FLB 457. A key requirement for validating this paradigm for use in clinical studies is demonstrating tha ..."
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displacement in the frontal cortex after three doses of amphetamine (0.3 mg/kg, 0.5 mg/kg, and 1 mg/kg). Amphetamine led to a significant dose-dependent increase in dialysate dopamine (DA, 0.3 mg/kg: 999 ± 287%; 0.5 mg/kg: 1320 ± 432%; 1.0 mg/kg: 2355 ± 1026%) as measured with microdiaysis and decrease in [11C
Multiple Description Wavelet Based Image Coding
, 1998
"... We consider the problem of coding images for transmission over error-prone channels. The impairments we target are transient channel shutdowns, as would occur in a packet network when a packet is lost, or in a wireless system during a deep fade: when data is delivered it is assumed to be error-free, ..."
Abstract
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Cited by 81 (8 self)
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We consider the problem of coding images for transmission over error-prone channels. The impairments we target are transient channel shutdowns, as would occur in a packet network when a packet is lost, or in a wireless system during a deep fade: when data is delivered it is assumed to be error
Therapeutic potential of cannabis in pain medicine
- British Journal of Anaesthesia
, 2008
"... Advances in cannabis research have paralleled developments in opioid pharmacology whereby a psychoactive plant extract has elucidated novel endogenous signalling systems with thera-peutic significance. Cannabinoids (CBs) are chemical compounds derived from cannabis. The major psychotropic CB delta-9 ..."
Abstract
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Cited by 8 (0 self)
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. Neuronal CB1Rs modulate synaptic trans-mission and mediate psychoactivity. Immune-cell CB2 receptors (CB2R) may down-regulate neuroinflammation and influence cyclooxygenase-dependent pathways. Animal models demonstrate that CBRs play a fundamental role in peripheral, spinal, and supraspinal nocicep
Decreased Spontaneous Eye Blink Rates in Chronic Cannabis Users: Evidence for Striatal Cannabinoid- Dopamine Interactions
, 2011
"... Chronic cannabis use has been shown to block long-term depression of GABA-glutamate synapses in the striatum, which is likely to reduce the extent to which endogenous cannabinoids modulate GABA- and glutamate-related neuronal activity. The current study aimed at investigating the effect of this proc ..."
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of this process on striatal dopamine levels by studying the spontaneous eye blink rate (EBR), a clinical marker of dopamine level in the striatum. 25 adult regular cannabis users and 25 non-user controls matched for age, gender, race, and IQ were compared. Results show a significant reduction in EBR in chronic
Results 1 - 10
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836
