232 research outputs found
Chemical Painting, Street Lights & Brew Year\u27s Eve
Chemical Painting
The black and white images are 35mm film prints I developed using “chemical painting.” I created the effect by dripping the developer onto the tray in order to only expose parts of the images. I like this process because you only have so much control over the outcome and no two prints will ever process exactly the same.
Street Lights
I shot these portraits in winter quarter when it felt like every day I was waking up to rain. I decided to bring in some of those elements into the studio, and I experimented with gel lighting to create a happier mood than what is usually associated with rain.
Brew Year’s Eve
My friend Eric Weinhardt organized a surf contest amongst our friends on New Year’s Eve 2018. It was an epic day celebrating the year with a good group of guys and some fun waves. Shoutout to my boy E.W. for setting it up
Recommended from our members
Gaps in Treatment and Surveillance: Head and Neck Cancer Care in a Safety-Net Hospital.
Objective:Treatment delays and suboptimal adherence to posttreatment surveillance may adversely affect head and neck cancer (HNC) outcomes. Such challenges can be exacerbated in safety-net settings that struggle with limited resources and serve a disproportionate number of patients vulnerable to gaps in care. This study aims to characterize treatment delays and adherence with posttreatment surveillance in HNC care at an urban tertiary care public hospital in San Francisco. Study Design:Retrospective chart review. Setting:Urban tertiary care public hospital in San Francisco. Subjects and Methods:We identified all cases of HNC diagnosed from 2008 to 2010 through the electronic medical record. We abstracted data, including patient characteristics, disease characteristics, pathology and radiology findings, treatment details, posttreatment follow-up, and clinical outcomes. Results:We included 64 patients. Median time from diagnosis to treatment initiation (DTI) was 57 days for all patients, 54 days for patients undergoing surgery only, 49 days for patients undergoing surgery followed by adjuvant radiation ± chemotherapy, 65 days for patients undergoing definitive radiation ± chemotherapy, and 29 days for patients undergoing neoadjuvant chemotherapy followed by radiation or chemoradiation. Overall, 69% of patients completed recommended treatment. Forty-two of 61 (69%) patients demonstrated adherence to posttreatment visits in year 1; this fell to 14 out of 30 patients (47%) by year 5. Conclusion:DTI was persistently prolonged in this study compared with prior studies in other public hospital settings. Adherence to posttreatment surveillance was suboptimal and continued to decline as the surveillance period progressed
Spatial and temporal factors in the discrimination of lifted weights
In a series of experiments investigating spatial and temporal factors in the discrimination of lifted weights, differential thresholds (DLs) were measured. The temporal factor, known as the time-order error, was found to be negative in one-handed and two-handed consecutive discrimination paradigms, and at low and high stimulus intensities. The spatial factor, known as the space—error, was found to produce a strong bias in a two-handed simultaneous discrimination paradigm. The direction of the bias did not correlate with hand preference or attentional factors but with sex; with weights appearing lighter in the preferred hand of males and heavier in the preferred hand of females. Other spatial factors, such as hand, hemispace and method of lifting were found to affect DLs. Surprisingly DLs for the preferred hand were not necessarily lower than DLs for the non-preferred hand. The preferred ear provided a more reliable indication of hand advantage by specifying to which cerebral hemisphere language was probably lateralised. The hand contralateral to the non-language (spatial) hemisphere revealed an advantage in weight discrimination.
Left-handed subjects were found to perform better than right handed subjects with their preferred hand. This was explained by the fact that a higher proportion of left-handed subjects have their preferred hand contralateral to the spatial hemisphere. DLs were found to be lower in the hemispace contralateral to the spatial processing hemisphere tor both right and left hands.
It was concluded that weight discrimination should be considered as a manipulospatial activity subserved by higher order functioning of the cerebral hemisphere contralateral to the hand used in lifting the weight and contralateral to the spatial field within which the weight was lifted
Using Optical Water-Type Classification in Data-Poor Water Quality Assessment: A Case Study in the Torres Strait
For many years, local communities have expressed concerns that turbid plume waters from the Fly River in Papua New Guinea may potentially deliver mine-derived contaminants to the Torres Strait, an ecologically and culturally unique area north of the Australian mainland. Information on suspended sediment transport and turbidity patterns are needed in this data-limited region to identify and manage downstream ecosystems that may be at risk of exposure from the Fly River runoff. This study used MODIS satellite time series and a colour-classification approach to map optical water types around the data-poor Gulf of Papua and Torres Strait region. The satellite data were supported by field data, including salinity and suspended sediment measurements, and used together in qualitative water quality assessments to evaluate the habitats that are likely exposed to Fly River discharge and/or derived sediments. It showed that the Fly River influence in the Torres Strait region is largely limited to the north-east corner of the Torres Strait. The drivers of turbidity vary between locations, and it is impossible to fully separate direct riverine plume influence from wave and tidally driven sediment resuspension in the satellite maps. However, results indicate that coastal habitats located as far east as Bramble Cay and west to Boigu Island are located in an area that is most likely exposed to the Fly River discharge within the region, directly or through sediment resuspension. The area that is the most likely exposed is a relatively small proportion of the Torres Strait region, but encompasses habitats of high ecological importance, including coral reefs and seagrass meadows. Satellite data showed that the period of highest risk of exposure was during the south-east trade wind season and complemented recent model simulations in the region over larger spatial and temporal frames. This study did not evaluate transboundary pollution or the ecological impact on local marine resources, but other recent studies suggest it is likely to be limited. However, this study did provide long-term, extensive but qualitative, baseline information needed to inform future ecological risk mapping and to support decision making about management priorities in the region. This is important for ensuring the protection of the Torres Strait ecosystems, given their importance to Torres Strait communities and turtle and dugong populations, and the Torres Strait’s connectivity with the Great Barrier Reef Marine Park
Restraint in mental health settings: is it time to declare a position?
The emergence of a drive to reduce restrictive interventions has been accompanied particularly in the UK by a debate focussing on restraint positions. Any restraint intervention delivered poorly can potentially lead to serious negative outcomes. More research is required to reliably state the risk attached to a particular position in a particular clinical circumstance.Declaration of interestF.S. is a consultant psychiatrist in Psychiatric Intensive Care at the Maudsley Hospital, London. He is on the Executive Committee of the National Association of Psychiatric Intensive Care and Low Secure Units, and was a member of the National Institute for Health and Care Excellence Guideline Development Group for the Short-Term Management of Aggression and Violence (2015). J.P. is a senior lecturer at the Faculty of Health and Life Sciences, Coventry University. E.B. is a consultant and expert witness in violence reduction and the use of physical interventions, independent expert to the High Secure Hospitals Violence Reduction Manual Steering Group and a member of the College of Policing Guideline Committee Steering Group and Mental Health Restraint Expert Reference Group. B.P. is the clinical director for Crisis and Aggression Limitation and Management (CALM) Training and formerly a senior lecturer for the Faculty of Health, University of Stirling. He is a nurse and psychotherapist and presently chairs the European Network for Training in the Management of Aggression. A.O'B. is a consultant psychiatrist, the Director of Educational Programmes for the National Association of Psychiatric Intensive Care and Low Secure Units, and the Dean for Students at St George's University of London
New Salamanders (Caudata: Plethodontidae) From Guatemala, with Miscellaneous Notes on Known Species
New salamanders in the genera Bolitoglossa and Dendrotriton are described from the highlands of Guatemala. These species are distinguished from their congeners by morphology and molecular differences, including elements of color pattern. These new species of salamanders were collected over the last 30 years, and for many of them the localities of some of these new species are now badly degradedhttp://deepblue.lib.umich.edu/bitstream/2027.42/111063/1/MP200.pd
Phenylcyanamidocopper(I) and Silver(I) Complexes: Synthetic and Structural Studies
Phenylcyanamidocopper(I) and silver(I) complexes of the type, [{M(PPh3)2L}2] (M = Cu, L = 4-NO2pcyd or 4-Me2Npcyd; M = Ag, L = 4-Me2Npcyd), [Cu(PPh3)3L] (L = pcyd or 4-NO2-pcyd), [Ag-(PPh3)3L] (L = pcyd, 2-Clpcyd, 4-Clpcyd, 4-Brpcyd, 4-MeOpcyd, 4-NO2pcyd or 4-Me2Npcyd), [Ag(Me2phen)(2-Clpcyd)] (Me2phen = 2,9-dimethyl-1,10-phenanthroline) and [Ag(dppm)(4-Brpcyd)] (dppm = bis(diphenylphosphino)methane) have been synthesised and characterised and the crystal structures of four of the complexes determined. For both [{Cu(PPh3)2(4-Me2Npcyd)}2] ⋅ CH2Cl2 and [{Ag(PPh3)2(4-Me2Npcyd)}2], the cyanamide ligands bridge the metal atoms in a μ-1,3-fashion through the cyano and amido nitrogens. Each metal atom has a distorted tetrahedral geometry, being bound to two triphenylphosphine phosphorus atoms and two nitro-gen atoms from 4-Me2Npcyd ligands to give a \u27P2N2\u27 coordination sphere. In the case of the Cu complex the dimer is centrosymmetric but for the Ag complex the metal atoms are not equivalent. The complexes, [Ag(PPh3)3(4-Brpcyd)] and [Ag(PPh3)3(4-Me-Opcyd)], are discrete monomers, in which each of the Ag atoms adopts a distorted tetrahedral geometry, being bound to three triphenylphosphine phosphorus atoms and one phenylcyanamide ligand binding in a terminal fashion through the cyano nitrogen
Global Population Dynamics and Hot Spots of Response to Climate Change
Understanding how biotic and abiotic factors influence the abundance and distribution of organisms has become more important with the growing awareness of the ecological consequences of climate change. In this article, we outline an approach that complements bioclimatic envelope modeling in quantifying the effects of climate change at the species level. The global population dynamics approach, which relies on distribution-wide, data-driven analyses of dynamics, goes beyond quantifying biotic interactions in population dynamics to identify hot spots of response to climate change. Such hot spots highlight populations or locations within species\u27 distributions that are particularly sensitive to climate change, and identification of them should focus conservation and management efforts. An important result of the analyses highlighted here is pronounced variation at the species level in the strength and direction of population responses to warming. Although this variation complicates species-level predictions of responses to climate change, the global population dynamics approach may improve our understanding of the complex implications of climate change for species persistence or extinction
Gravity duals of half-BPS Wilson loops
We explicitly construct the fully back-reacted half-BPS solutions in Type IIB
supergravity which are dual to Wilson loops with 16 supersymmetries in
super Yang-Mills. In a first part, we use the methods of a
companion paper to derive the exact general solution of the half-BPS equations
on the space , with isometry group
in terms of two locally harmonic functions
on a Riemann surface with boundary. These solutions, generally, have
varying dilaton and axion, and non-vanishing 3-form fluxes. In a second part,
we impose regularity and topology conditions. These non-singular solutions may
be parametrized by a genus hyperelliptic surface , all of
whose branch points lie on the real line. Each genus solution has only a
single asymptotic region, but exhibits homology
3-spheres, and an extra homology 5-spheres, carrying respectively RR 3-form
and RR 5-form charges. For genus 0, we recover with 3 free
parameters, while for genus , the solution has free
parameters. The genus 1 case is studied in detail. Numerical analysis is used
to show that the solutions are regular throughout the parameter space.
Collapse of a branch cut on subtending either a homology 3-sphere or a
homology 5-sphere is non-singular and yields the genus solution. This
behavior is precisely expected of a proper dual to a Wilson loop in gauge
theory.Comment: 62 pages, LaTeX, 6 figures, v2: minor change
- …