382 research outputs found
TUCreate - eine Werkstatt fĂŒr Studenten am IMW
Die Studierendenwerkstatt TUCreate ermöglicht allen Studenten der TU Clausthal das Fertigen von Bauteilen. Neben der praktischen Erfahrung wird im Vorfeld auch das notwendige Hintergrundwissen erlernt und somit das Wissen aus den Vorlesungen in die praktische Anwendung ĂŒberfĂŒhrt.The TUCreate workspace could be used by all students in Clausthal to manufacture parts. Beside the practical skills, also the theoretical backgrounds are learned. Therefore students have the chance to transfer their knowledge from several lectures into practical work and experience
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Year-round stratospheric aerosol backscatter ratios calculated from lidar measurements above northern Norway
We present a new method for calculating backscatter ratios of the stratospheric sulfate aerosol (SSA) layer from daytime and nighttime lidar measurements. Using this new method we show a first year-round dataset of stratospheric aerosol backscatter ratios at high latitudes. The SSA layer is located at altitudes between the tropopause and about 30âkm. It is of fundamental importance for the radiative balance of the atmosphere. We use a state-of-the-art Rayleigh-Mie-Raman lidar at the Arctic Lidar Observatory for Middle Atmosphere Research (ALOMAR) station located in northern Norway (69N, 16E; 380ma.s.l.). For nighttime measurements the aerosol backscatter ratios are derived using elastic and inelastic backscatter of the emitted laser wavelengths 355, 532 and 1064nm. The setup of the lidar allows measurements with a resolution of about 5âmin in time and 150âm in altitude to be performed in high quality, which enables the identification of multiple sub-layers in the stratospheric aerosol layer of less than 1âkm vertical thickness. We introduce a method to extend the dataset throughout the summer when measurements need to be performed under permanent daytime conditions. For that purpose we approximate the backscatter ratios from color ratios of elastic scattering and apply a correction function. We calculate the correction function using the average backscatter ratio profile at 355nm from about 1700âh of nighttime measurements from the years 2000 to 2018. Using the new method we finally present a year-round dataset based on about 4100âh of measurements during the years 2014 to 2017. © Author(s) 2019
Bericht zur Untersuchung der DLR Institute zum Bedarf beim Forschungsdatenmanagement
Im Projekt FDM wurde fĂŒr die Umsetzung des Konzeptes Forschungsdatenmanagement im DLR eine Umfrage
unter den Instituten und Einrichtungen durchgefĂŒhrt, um die tatsĂ€chlichen Bedarfe im Bereich des Forschungsdatenmanagements besser einordnen und abschĂ€tzen zu können
Sociodemographic factors and delays in the diagnosis of six cancers: analysis of data from the âNational Survey of NHS Patients: Cancer'
This paper aims to explore the relationship between sociodemographic factors and the components of diagnostic delay (total, patient and primary care, referral, secondary care) for these six cancers (breast, colorectal, lung, ovarian, prostate, or non-Hodgkin's lymphoma). Secondary analysis of patient-reported data from the âNational Survey of NHS patients: Cancer' was undertaken (65â192 patients). Data were analysed using univariate analysis and Generalised Linear Modelling. With regard to total delay, the findings from the GLM showed that for colorectal cancer, the significant factors were marital status and age, for lung and ovarian cancer none of the factors were significant, for prostate cancer the only significant factor was social class, for non-Hodgkin's lymphoma the only significant factor was age, and for breast cancer the significant factors were marital status and ethnic group. Where associations between any of the component delays were found, the direction of the association was always in the same direction (female subjects had longer delays than male subjects, younger people had longer delays than older people, single and separated/divorced people had longer delays than married people, lower social class groups had longer delays than higher social class groups, and Black and south Asian people had longer delays than white people). These findings should influence the design of interventions aimed at reducing diagnostic delays with the aim of improving morbidity, mortality, and psychological outcomes through earlier stage diagnosis
PetaFLOP Molecular Dynamics for Engineering Applications
Molecular dynamics (MD) simulations enable the investigation of multicomponent and multiphase processes relevant to engineering applications, such as droplet coalescence or bubble formation. These scenarios require the simulation of ensembles containing a large number of molecules. We present recent advances within the MD framework ls1 mardyn which is being developed with particular regard to this class of problems. We discuss several OpenMP schemes that deliver optimal performance at node-level. We have further introduced nonblocking communication and communication hiding for global collective operations. Together with revised data structures and vectorization, these improvements unleash PetaFLOP performance and enable multi-trillion atom simulations on the HLRS supercomputer Hazel Hen. We further present preliminary results achieved for droplet coalescence scenarios at a smaller scale.BMBF, 01IH16008, Verbundprojekt: TaLPas - Task-basierte Lastverteilung und Auto-Tuning in der Partikelsimulatio
Axis I comorbidity in adolescent inpatients referred for treatment of substance use disorders
<p>Abstract</p> <p>Background</p> <p>To assess comorbid DSM-IV-TR Axis I disorders in adolescent inpatients referred for treatment of substance use disorders.</p> <p>Methods</p> <p>151 patients (mean age 16.95 years, SD = 1.76; range 13 - 22) were consecutively assessed with the Composite International Diagnostic Interview (CIDI) and standardized clinical questionnaires to assess mental disorders, symptom distress, psychosocial variables and detailed aspects of drug use. A consecutively referred subgroup of these 151 patients consisting of 65 underage patients (mean age 16.12, SD = 1.10; range 13 - 17) was additionally assessed with the modules for attention-deficit/hyperactivity disorder (ADHD) and conduct disorder (CD) using The Schedule for Affective Disorders and Schizophrenia for school-aged children (K-SADS-PL).</p> <p>Results</p> <p>128 (84.8%) of the 151 patients were dependent on at least one substance, the remaining patients fulfilled diagnostic criteria for abuse only. 40.5% of the participants fulfilled criteria for at least one comorbid present Axis I disorder other than substance use disorders (67.7% in the subgroup additionally interviewed with the K-SADS-PL). High prevalences of present mood disorder (19.2%), somatoform disorders (9.3%), and anxiety disorders (22.5%) were found. The 37 female participants showed a significantly higher risk for lifetime comorbid disorders; the gender difference was significantly pronounced for anxiety and somatoform disorders. Data from the underage subgroup revealed a high prevalence for present CD (41.5%). 33% of the 106 patients (total group) who were within the mandatory school age had not attended school for at least a two-month period prior to admission. In addition, 51.4% had been temporarily expelled from school at least once.</p> <p>Conclusions</p> <p>The present data validates previous findings of high psychiatric comorbidity in adolescent patients with substance use disorders. The high rates of school refusal and conduct disorder indicate the severity of psychosocial impairment.</p
Dystroglycan versatility in cell adhesion: a tale of multiple motifs
Dystroglycan is a ubiquitously expressed heterodimeric adhesion receptor. The extracellular a-subunit makes connections
with a number of laminin G domain ligands including laminins, agrin and perlecan in the extracellular
matrix and the transmembrane b-subunit makes connections to the actin filament network via cytoskeletal linkers
including dystrophin, utrophin, ezrin and plectin, depending on context. Originally discovered as part of the dystrophin
glycoprotein complex of skeletal muscle, dystroglycan is an important adhesion molecule and signalling scaffold
in a multitude of cell types and tissues and is involved in several diseases. Dystroglycan has emerged as a
multifunctional adhesion platform with many interacting partners associating with its short unstructured cytoplasmic
domain. Two particular hotspots are the cytoplasmic juxtamembrane region and at the very carboxy terminus
of dystroglycan. Regions which between them have several overlapping functions: in the juxtamembrane region; a
nuclear localisation signal, ezrin/radixin/moesin protein, rapsyn and ERK MAP Kinase binding function, and at the C
terminus a regulatory tyrosine governing WW, SH2 and SH3 domain interactions. We will discuss the binding partners
for these motifs and how their interactions and regulation can modulate the involvement of dystroglycan in a
range of different adhesion structures and functions depending on context. Thus dystroglycan presents as a multifunctional
scaffold involved in adhesion and adhesion-mediated signalling with its functions under exquisite spatiotemporal
regulation
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