383 research outputs found
Letter from A. C. Van Raalte to Mr. Postma
No full textA letter of the Rev. Albertus C. Van Raalte to a Mr. Postma, in Zwolle, the Netherlands. A.C.V.R. is writing on behalf of the Classis of Holland because there is such a need for ministers in the Colony. Therefore, the Classis is extending a call to the Rev. Postma to serve a congregation in the Colony.https://digitalcommons.hope.edu/vrp_1850s/1215/thumbnail.jp
Carbon nanotube junctions and devices
No full textIn this thesis Postma presents transport experiments performed on individual single-wall carbon nanotubes. Carbon nanotubes are molecules entirely made of carbon atoms. The electronic properties are determined by the exact symmetry of the nanotube lattice, resulting in either metallic or semiconducting behaviour. Due to their small diameter, electronic motion is directed in the length direction of the nanotube, making them ideal systems to study e.g. one-dimensional transport phenomena. First, we present mK-temperature current-voltage characteristics of an individual single-wall carbon nanotube showing Coulomb blockade and resonant tunnelling through individual molecular levels. We then report electrical transport measurements on carbon nanotubes with naturally occurring intramolecular junctions. We find that a metal-semiconductor junction behaves like a rectifying diode, whereas the conductance of a metal-metal junction behaves like a tunnel junction with associated power-law dependencies described by a Luttinger liquid model for tunnelling between the two nanotube segments. In order to further study carbon nanotube intramolecular junctions, we developed an atomic force microscope (AFM) manipulation technique, by means of which carbon nanotube junctions such as buckles and crossings are created. The electronic transport properties of these manipulated structures show that they form electronic nanometer-size tunnel junctions. Thereafter, room-temperature single-electron transistors are realized within metallic carbon nanotubes. The devices feature a short (down to 20 nm) nanotube section that is created by AFM manipulation. Coulomb charging is observed at room temperature. We observe unconventional power-law dependencies in the transport properties for which we develop a resonant-tunnelling Luttinger-liquid model. Finally, the low-frequency electronic noise properties of metallic carbon nanotubes are investigated. The noise power exhibits a 1/f frequency dependence that is three orders of magnitude smaller at 8 K than at 300 K. As a demonstration of how these noise properties affect nanotube devices, we present a preliminary investigation of the noise characteristics of an intramolecular carbon nanotube single-electron transistor.Applied Science
The era of our lives: The memory of Korsakoff patients for the first Covid-19 pandemic lockdown in the Netherlands
No full textMemories for worldwide and emotional events (such as 9/11) are more vividly relived and recalled than memories for everyday events. Previous studies have shown that flashbulb memories of a single event enhanced the memory strength in severe amnesia. It is currently unknown whether macro-events that stretch out over longer periods of time (weeks, months) strengthen memory even further. Our aim was therefore to investigate to what extent patients with severe amnesia, due to Korsakoff’s syndrome (KS), were able to relive the first Covid-19 lockdown in the Netherlands, and whether experienced emotions enhanced reliving of the participants. We included 22 KS patients and 24 age-, education-, and gender-matched healthy controls. Covid-19 related memories were assessed by measures of autobiographical memory specificity, phenomenological reliving, emotional intensity and semantic-and episodic knowledge about the first lockdown in March 2020 – May 2020 in the Netherlands. Although amnesia patients remembered significantly fewer autobiographical details regarding the Covid-19 lockdown than healthy controls, one fourth of the KS patients recalled specific events. Amnesia patients reported levels of emotional intensity equivalent to those in the control group. Stronger autobiographical reliving was associated with higher emotional intensity. Both amnesia patients and healthy controls had higher recall of episodic than semantic lockdown related information. In conclusion, results demonstrate that information for macro-events can still be memorized and relived, most specifically when emotional valence is high, even by highly amnestic patients
The clinical and economic efficacy of HAART: a shift from inpatient medical to outpatient pharmaceutical care for HIV/AIDS patients in Northeastern Italy
No full textAbstract This study describes epidemiological, clinical and economic impact of the HIVepidemic in Italy prior to and after the introduction of HAART. A prospective, observational, multi-center design was applied using data collected on an AIDS cohort from 1994 and updated data from a comparable cohort in 1998. Mortality and direct medical costs were measured in 251 AIDS patients in 1994 and 77 AIDS patients in 1998. A considerable difference was observed in mortality (33.9% in 1994 vs. 3.9% in 1998). The numbers of hospital admissions were 1.9 in 1994 and 0.8 in 1998; average length of stay was 31.4 days in 1994 and 12.6 days in 1998. The cost per patient per year was 17,250 Euros in 1994 and 11,465 Euros in 1998. The comparison of two cohorts between time periods has enabled changes in costs and outcomes to be linked to the introduction of HAART in 1997.
In conclusion, after the introduction of HAART hospital-based provision shifted from an inpatientbased to an outpatient-based service with major focus on pharmaceutical care
sj-docx-1-eso-10.1177_23969873231173274 – Supplemental material for Admission blood pressure and clinical outcomes in patients with acute ischaemic stroke treated with intravenous alteplase and endovascular treatment versus endovascular treatment alone: A MR CLEAN-NO IV substudy
No full textSupplemental material, sj-docx-1-eso-10.1177_23969873231173274 for Admission blood pressure and clinical outcomes in patients with acute ischaemic stroke treated with intravenous alteplase and endovascular treatment versus endovascular treatment alone: A MR CLEAN-NO IV substudy by Sophie A van den Berg, Simone M Uniken Venema, Natalie E LeCouffe, Alida A Postma, Geert J Lycklama à Nijeholt, Leon A Rinkel, Kilian M Treurniet, Manon Kappelhof, Agnetha E Bruggeman, Katinka R van Kranendonk, Charles BLM Majoie, Diederik WJ Dippel, H Bart van der Worp, Jonathan M Coutinho, Paul J Nederkoorn and Yvo BWEM Roos in European Stroke Journal</p
sj-docx-2-eso-10.1177_23969873231173274 – Supplemental material for Admission blood pressure and clinical outcomes in patients with acute ischaemic stroke treated with intravenous alteplase and endovascular treatment versus endovascular treatment alone: A MR CLEAN-NO IV substudy
No full textSupplemental material, sj-docx-2-eso-10.1177_23969873231173274 for Admission blood pressure and clinical outcomes in patients with acute ischaemic stroke treated with intravenous alteplase and endovascular treatment versus endovascular treatment alone: A MR CLEAN-NO IV substudy by Sophie A van den Berg, Simone M Uniken Venema, Natalie E LeCouffe, Alida A Postma, Geert J Lycklama à Nijeholt, Leon A Rinkel, Kilian M Treurniet, Manon Kappelhof, Agnetha E Bruggeman, Katinka R van Kranendonk, Charles BLM Majoie, Diederik WJ Dippel, H Bart van der Worp, Jonathan M Coutinho, Paul J Nederkoorn and Yvo BWEM Roos in European Stroke Journal</p
Calculations of atomic configurations using many-body techniques in relativistic formulation: Application to hyperfine interaction
No full textApplied SciencesApplied Science
On the electron spin echo envelope modulation technique case studies with application of parametric spectral analysis
No full textApplied Science
Neutron Capture Gamma-Ray Spectroscopy With 107AG, 109AG and 115In, for Parity Violation and Nuclear Structure Studies
No full textApplied Science
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