874 research outputs found
Classification of human motion based on affective state descriptors
Cataloged from PDF version of article.Human body movements and postures carry emotion-specific information. On the basis of this motivation, the objective of
this study is to analyze this information in the spatial and temporal structure of the motion capture data and extract features
that are indicative of certain emotions in terms of affective state descriptors. Our contribution comprises identifying the
directly or indirectly related descriptors to emotion classification in human motion and conducting a comprehensive analysis
of these descriptors (features) that fall into three different categories: posture descriptors, dynamic descriptors, and
frequency-based descriptors in order to measure their performance with respect to predicting the affective state of an input
motion. The classification results demonstrate that no single category is sufficient by itself; the best prediction performance
is achieved when all categories are combined. Copyright © 2013 John Wiley & Sons, Ltd
Roughness Induced Rotational Slowdown Near the Colloidal Glass Transition
Roughening the surface of spherical colloids can drastically change their
translational and rotational dynamics in dense suspensions. Using 3D confocal
microscopy, we show that roughness not only lowers the concentration of the
translational colloidal glass transition, but also generates a broad
concentration range in which the rotational Brownian motion changes signature
from high-amplitude diffusive to low-amplitude rattling. This hitherto not
reported second glass transition for rough spherical colloids emerges when the
particle intersurface distance becomes comparable to the roughness length
scale. Interlocking contacts are responsible for restricting the particle
rotations
Spherical probes for simultaneous measurement of rotational and translational diffusion in 3 dimensions
Real time visualization and tracking of colloidal particles with 3D
resolution is essential for probing the local structure and dynamics in complex
fluids. Although tracking translational motion of spherical colloids is
well-known, accessing rotational dynamics of such particles remains a great
challenge. Here, we report a novel approach of using fluorescently labeled
raspberry-like colloids with an optical anisotropy to concurrently track
translational and rotational dynamics in 3 dimensions. The raspberry-like
particles are coated by a silica layer of adjustable thickness, which allows
tuning the surface roughness. The synthesis and applicability of the proposed
method is demonstrated by two types of probes: rough and smoothened. The
accuracy of measuring Mean Squared (Angular) Displacements are also
demonstrated by using these 2 probes dispersed in 2 different solvents. The
presented 3D trackable colloids offer a high potential for wide range of
applications and studies, such as probing crystallization dynamics, phase
transitions and the effect of surface roughness on diffusion
Autekologi dan Fisiologi Percambahan Centaurea kilaea Boiss. dari Turki
In this study germination requirements, plant-soil interactions and population biology of Centaurea kilaea was studied. The plant and soil samples were collected from Sofular Village (Sile District) and shore of Çatalca District (Istanbul) in Turkey by using standard methods. Methods like Scheibler, Wetdigestion, Kjeldahl and Olsen were employed for measurement of soil texture, structure and other physical and chemical characteristics (pH, total protein and electrical conductivity) using spectrophotometer, flame photometer, calcimeter and ICP. The results showed that ranges of different elements in the soil were 0.007-0.2% for N, 0.0007-0.001% for P, 0.001-0.01% for K, 0.0001-0.0002 % for Na. N, P, K and Na values in the plants were 2.17, 0.005, 0.1 and 0.006%, respectively. The data revealed that germination success of the seeds was influenced by the environmental factors such as pH, germination season and temperature.Dalam kajian ini keperluan percambahan, saling tindakan tumbuhan-tanih dan biologi populasi Centaurea kilaea telah dilakukan. Sampel tumbuhan dan tanih telah dikumpul dari Kampung Sofular (Daerah Şile) dan pantai Daerah Çatalca (Istanbul) di Turki dengan menggunakan kaedah piawai. Kaedah seperti Scheibler, Wetdigestion, Kjeldahl dan Olsen telah digunakan bagi pengukuran tekstur tanih, struktur dan sifat fizikal dan kimia lain (pH, jumlah protein dan kekonduksian elektrik) menggunakan spektrofotometer, fotometer api, kalsimeter dan ICP. Hasil menunjukkan bahawa julat unsur berbeza dalam tanih ialah 0.007-0.2% bagi N, 0.0007-0.001% bagi P, 0.001-0.01% bagi K, 0.0001-0.0002% bagi Na. N, P, K dan nilai Na dalam tumbuhan ialah masing-masing 2.17, 0.005, 0.1 dan 0.006%. Data menunjukkan kejayaan percambahan bagi biji benih telah dipengaruhi faktor persekitaran seperti pH, musim percambahan dan suhu
Citizen Relationship Management in den USA und in Deutschland: 311 – 115 – Service Apps
Lebenswerte Städte der Wissensgesellschaft, sogenannte „Smart Cities“, bieten eine Vielzahl an intelligenten Dienstleistungen an, die auf Informations- und Kommunikationstechnologie (IKT), elaborierte Informationsübermittlung und auf Wissen aufbauen. Im Hinblick auf kommunale Verwaltungs- und Entscheidungsprozesse stellen Bürger einen zunehmend wichtiger werdenden Faktor dar. Die Einbindung der Bürger in diese Prozesse wird durch kommunale Bürgerbeteiligungssysteme (Citizen Relationship Management; CiRM) realisiert. Seit 1996 gibt es in den USA 311-Systeme, die sowohl Informationsanfragen als auch Serviceaufträge innerhalb eines CiRM bearbeiten und über erfolgte Tätigkeiten berichten. Das führt zu Transparenz beim Verwaltungshandeln und beim Bürger zu einer Identifikation mit „seiner“ Stadt und zu vermehrter Mitarbeit. In Deutschland werden – über zwanzig Jahre später – ebenfalls CiRM-Systeme konzipiert und teilweise bereits schon als 115-Systeme oder als Service App eingesetzt. Als Fallbeispiel wird über das System der Stadt Köln und eine Informationsbedarfsanalyse von Bürgern und Touristen Kölns zu einem kommunalen CiRM berichtet
Image-based dosimetry for 225Ac-PSMA-I&T therapy using quantitative SPECT
Purpose!#!After a decade of PET/MR, the case of attenuation correction (AC) remains open. The initial four-compartment (air, water, fat, soft tissue) Dixon-based AC scheme has since been expanded with several features, the latest being MR field-of-view extension and a bone atlas. As this potentially changes quantification, we evaluated the impact of these features in PET AC in prostate cancer patients.!##!Methods!#!Two hundred prostate cancer patients were examined with either !##!Results!#!High correlation and no visually perceivable differences between all evaluated methods (r > 0.996) were found. The mean relative difference in lesion uptake of !##!Conclusions!#!Based on these results and the encountered bone atlas registration inaccuracy, we deduce that including bones and extending the MR field-of-view did not introduce clinically significant differences in PSMA diagnostic accuracy and tracer uptake quantification in prostate cancer pelvic lesions, facilitating the analysis of serial studies respectively. However, in the absence of ground truth data, we advise against atlas-based methods when comparing serial scans for bone lesions
Nonequilibrium Josephson effect in mesoscopic ballistic multiterminal SNS junctions
We present a detailed study of nonequilibrium Josephson currents and
conductance in ballistic multiterminal SNS-devices. Nonequilibrium is created
by means of quasiparticle injection from a normal reservoir connected to the
normal part of the junction. By applying a voltage at the normal reservoir the
Josephson current can be suppressed or the direction of the current can be
reversed. For a junction longer than the thermal length, , the
nonequilibrium current increases linearly with applied voltage, saturating at a
value equal to the equilibrium current of a short junction. The conductance
exhibits a finite bias anomaly around . For symmetric
injection, the conductance oscillates -periodically with the phase
difference between the superconductors, with position of the minimum
( or ) dependent on applied voltage and temperature. For
asymmetric injection, both the nonequilibrium Josephson current and the
conductance becomes -periodic in phase difference. Inclusion of barriers
at the NS-interfaces gives rise to a resonant behavior of the total Josephson
current with respect to junction length with a period . Both
three and four terminal junctions are studied.Comment: 21 pages, 19 figures, submitted to Phys. Rev.
18F-PSMA-1007 PET/CT for response assessment in patients with metastatic renal cell carcinoma undergoing tyrosine kinase or checkpoint inhibitor therapy: preliminary results
INTRODUCTION Tyrosine kinase (TKI) and checkpoint inhibitors (CI) prolonged overall survival in metastatic renal cell carcinoma (mRCC). Early prediction of treatment response is highly desirable for the individualization of patient management and improvement of therapeutic outcome; however, serum biochemistry is unable to predict therapeutic efficacy. Therefore, we compared 18F-PSMA-1007 PET imaging for response assessment in mRCC patients undergoing TKI or CI therapy compared to CT-based response assessment as the current imaging reference standard.
METHODS 18F-PSMA-1007 PET/CT was performed in mRCC patients prior to initiation of systemic treatment and 8~weeks after therapy initiation. Treatment response was evaluated separately on 18F-PSMA-PET and CT. Changes on PSMA-PET (SUVmean) were assessed on a per patient basis using a modified PERCIST scoring system. Complete response (CRPET) was defined as absence of any uptake in all target lesions on posttreatment PET. Partial response (PRPET) was defined as decrease in summed SUVmean of > 30%. The appearance of new, PET-positive lesions or an increase in summed SUVmean of > 30% was defined as progressive disease (PDPET). A change in summed SUVmean of ± 30% defined stable disease (SDPET). RECIST 1.1 criteria were used for response assessment on CT. Results of radiographic response assessment on PSMA-PET and CT were compared.
RESULTS Overall, 11 mRCC patients undergoing systemic treatment were included. At baseline PSMA-PET1, all mRCC patients showed at least one PSMA-avid lesion. On follow-up PET2, 3 patients showed CRPET, 3 PRPET, 4 SDPET, and 1 PDPET. According to RECIST 1.1, 1 patient showed PRCT, 9 SDCT, and 1 PDCT. Overall, concordant classifications were found in only 2 cases (2 SDCT + PET). Patients with CRPET on PET were classified as 3 SDCT on CT using RECIST 1.1. By contrast, the patient classified as PRCT on CT showed PSMA uptake without major changes during therapy (SDPET). However, among 9 patients with SDCT on CT, 3 were classified as CRPET, 3 as PRPET, 1 as PDPET, and only 2 as SDPET on PSMA-PET. CONCLUSION On PSMA-PET, heterogeneous courses were observed during systemic treatment in mRCC patients with highly diverging results compared to RECIST 1.1. In the light of missing biomarkers for early response assessment, PSMA-PET might allow more precise response assessment to systemic treatment, especially in patients classified as SD on CT
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