161 research outputs found
Computerunterstütztes rückgekoppeltes Beatmungssystem: Validierung eines neuen Beatmungsmodus für eine minimale Druckbelastung
A monolithically integrated double Michelson interferometer for optical displacement measurement with direction determination
Using Student Ambassadors to Relay Themes from Changing the Conversation in Engineering First Year Seminars
This paper describes the efforts at a large mid-Atlantic university to integrate themes from Changing the Conversation into First Year Seminars. Changing the Conversation, a 2008 book by the National Academy of Engineering, found that both male and female students were more attracted to messages describing engineering in terms relating to societal impact, such as the phrases, Engineering makes a world of difference and Engineering is essential to our health, happiness, and safety. Although the research was conducted with younger students, the potential for using these themes in the undergraduate curricula could have the potential to impact persistence in engineering, especially for female students or those from other underrepresented groups. The purpose of the initiative described in the paper, which uses engineering students from a group called the Engineering Ambassadors to relay these messages in freshmen level courses, is to impact student perceptions of engineering and to provide information to students that will be critical in making career decisions.
In the Fall of 2011, a pilot program was launched in two sections of a Chemical Engineering First Year Seminar. Engineering Ambassadors made four separate visits to each section, focusing on the following topics: 1) An overview of College of Engineering Majors, 2) Options within Chemical Engineering, 3) Student experiences in the College of Engineering, and 4) How to be a successful engineering student. Woven through each presentation were themes from Changing the Conversation, focusing on how engineers are essential to health, happiness and safety. The students were mentored by a faculty member whose background is in Communication. The quality of student presentations was high, utilizing the assertion-evidence method of slide design.
Data was collected to determine whether the following project objectives were met: 1) Students in the First Year Seminars will have a greater understanding of the possible careers in engineering as well as the engineering majors; and 2) Students will be more likely to define engineering in terms associated with health, happiness, and safety. The data showed that the students had a very positive reaction to the Engineering Ambassador visits, although a larger sample size would be necessary to more clearly understand the impact
Advanced code-division multiplexers for superconducting detector arrays
Multiplexers based on the modulation of superconducting quantum interference
devices are now regularly used in multi-kilopixel arrays of superconducting
detectors for astrophysics, cosmology, and materials analysis. Over the next
decade, much larger arrays will be needed. These larger arrays require new
modulation techniques and compact multiplexer elements that fit within each
pixel. We present a new in-focal-plane code-division multiplexer that provides
multiplexing elements with the required scalability. This code-division
multiplexer uses compact lithographic modulation elements that simultaneously
multiplex both signal outputs and superconducting transition-edge sensor (TES)
detector bias voltages. It eliminates the shunt resistor used to voltage bias
TES detectors, greatly reduces power dissipation, allows different dc bias
voltages for each TES, and makes all elements sufficiently compact to fit
inside the detector pixel area. These in-focal-plane code-division multiplexers
can be combined with multi-gigahertz readout based on superconducting
microresonators to scale to even larger arrays.Comment: 8 pages, 3 figures, presented at the 14th International Workshop on
Low Temperature Detectors, Heidelberg University, August 1-5, 2011,
proceedings to be published in the Journal of Low Temperature Physic
Prior Medications and the Cardiovascular Benefits From Combination Angiotensin‐Converting Enzyme Inhibition Plus Calcium Channel Blockade Among High‐Risk Hypertensive Patients
Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/142520/1/jah32856_am.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/142520/2/jah32856.pd
Imagens sociais de famílias com filhos em acolhimento e em contexto familiar: um estudo entre Brasil e Portugal
A literatura indica que as famílias de crianças e jovens em acolhimento institucional podem ser estigmatizadas socialmente, gerando um impacto negativo no seu bem-estar, na construção da sua identidade e no sucesso da intervenção familiar. No entanto, poucos estudos investigam empiricamente esta imagem social. Este estudo teve como objetivo analisar a imagem social das famílias de crianças e jovens em diferentes contextos em Portugal e no Brasil. Uma amostra de 378 participantes (176 portugueses e 202 brasileiros) foi solicitada a indicar cinco atributos de famílias de crianças e jovens em acolhimento institucional e outros cinco atributos de famílias de crianças e jovens em contexto familiar, de estatutos socioeconômicos baixo e médio. Os dados indicam que em ambos os países existe um predomínio de atributos negativos associados às famílias de crianças e jovens em acolhimento institucional e de estatuto socioeconômico baixo, e um predomínio de atributos positivos associados às famílias em contexto familiar de estatuto socioeconômico médio. Destaca-se a necessidade de intervenções, especialmente com profissionais que atuam junto a essa população, para conscientização sobre essas imagens sociais.info:eu-repo/semantics/publishedVersio
Resonant Steps in the Characteristics of a Josephson Junction Coupled to a Transmission Line
A novel circuit is described which functions as an electronic analog of lumped element transmission line. The circuit requires only operational amplifiers, resistors, and capacitors. This module was coupled to a Josephsonj unction simulator and current voltage characteristics of the combined system were recorded. Steps were observed at voltages determined by the appropriate line resonances. When the transmission line was terminated with loads less than the characteristic impedance, chaos was seen in the lower steps. Similar results were obtained by numerical integration of the corresponding system of differential equations
Microscopic nonequilibrium theory of double-barrier Josephson junctions
We study nonequilibrium charge transport in a double-barrier Josephson
junction, including nonstationary phenomena, using the time-dependent
quasiclassical Keldysh Green's function formalism. We supplement the kinetic
equations by appropriate time-dependent boundary conditions and solve the
time-dependent problem in a number of regimes. From the solutions,
current-voltage characteristics are derived. It is understood why the
quasiparticle current can show excess current as well as deficit current and
how the subgap conductance behaves as function of junction parameters. A
time-dependent nonequilibrium contribution to the distribution function is
found to cause a non-zero averaged supercurrent even in the presence of an
applied voltage. Energy relaxation due to inelastic scattering in the
interlayer has a prominent role in determining the transport properties of
double-barrier junctions. Actual inelastic scattering parameters are derived
from experiments. It is shown as an application of the microscopic model, how
the nature of the intrinsic shunt in double-barrier junctions can be explained
in terms of energy relaxation and the opening of Andreev channels.Comment: Accepted for Phys. Rev.
Effectiveness of initiating treatment with valsartan/hydrochlorothiazide in patients with stage-1 or stage-2 hypertension
This prospective, 6-week, multicenter, double-blind study examined the benefits of initiating treatment with combination valsartan/hydrochlorothiazide (HCTZ) compared with initial valsartan monotherapy for 648 patients with stage-1 or stage-2 hypertension (age=52.6±10 years; 54% male; baseline blood pressure (BP)=161/98 mm Hg, 32% stage 1). Patients were randomized to valsartan 80 mg (V-low), valsartan 160 mg (V-high) or valsartan/HCTZ 160/12.5 mg (V/HCTZ), and electively titrated after weeks 2 and 4 to the next dosage level (maximum dose valsartan/HCTZ 160/25 mg) if BP remained >140/90 mm Hg. At end of the study, patients initiated with V/HCTZ required less titration steps compared with the initial valsartan monotherapy groups (63 vs 86% required titration by study end, respectively) and reached the target BP goal of <140/90 mm Hg in a shorter period of time (2.8 weeks) (P<0.0001) vs V-low (4.3 weeks) and V-high (3.9 weeks). Initial combination therapy was also associated with higher BP control rates and greater reductions in both systolic and diastolic BP from baseline (63%, −27.7±13/–15.1±8 mm Hg) compared with V-low (46%, −21.2±13/−11.4±8 mm Hg, P<0.0001) or V-high (51%, −24.0±13/−12.0±10 mm Hg, P<0.01). Overall and drug-related AEs were mild to moderate and were similar between V/HCTZ (53.1 and 14.1%, respectively) and the two monotherapy groups, V-low (50.5 and 13.8%) and V-high (50.7 and 11.8%). In conclusion, initiating therapy with a combination of valsartan and low-dose HCTZ results in early, improved BP efficacy with similar tolerability as compared with starting treatment with a low or higher dose of valsartan for patients with stage-1 and stage-2 hypertension
- …