Drei Jahre in Amerika : 1859-1862

von I. J. Benjamin

Šeërith Jisrael : of Lotgevallen der Joden in alle werelddeelen, van af de verwoesting des 2. tempels tot het jaar 1770

door Menachem Man ben Salomo Halevi... uit het Joodsch-Duitsch vertaald door L. Goudsmit ... verrijkt door G. I. Polak

Der Weltkrieg und das Schicksal der Juden : Stimme eines galizischen Juden an seine Glaubensgenossen in den neutralen Ländern insbesondere in Amerika

von Binjamin Segel

Šolem alechem tzu imigranṭen : a kurtze erklehrung wegen des leben in Amerika ; eroisgegeben for des nutzen fun naie eingewanderṭe iden ...

Digitalisat der Ausg. [New York], 1903

Moderner idišer redner : oisderweilṭe derošes un redes af religieze filozofiše un natzionale ṭemes

tzusamengešṭelṭ un iberzsṭ fun '. Š.

Di landwirṭšafṭliche kevutze in Eretz-Jiśroel in jor 1920

Nir

Eretz-Jiśroel in fergangenheiṭ un gegenwarṭ : geografie, gešichṭe, rechṭliche ferhelṭnise, befelkerung, landwirṭšafṭ, handel un indusṭrie

fun D. Ben-Gurjon un J. Ben-Tzvi

Iber Amerika

Peretz Hiršbein

Amerika far Kolumbus : a kulturgeshichtliche nochforshung ...

fun Filip Krantz

The calculation of Afρ and mass loss rate for comets

Ab initio calculations of Afρ are presented using Mie scattering theory and a Direct Simulation Monte Carlo (DSMC) dust outflow model in support of the Rosetta mission and its target 67P/Churyumov-Gerasimenko (CG). These calculations are performed for particle sizes ranging from 0.010 μm to 1.0 cm. The present status of our knowledge of various differential particle size distributions is reviewed and a variety of particle size distributions is used to explore their effect on Afρ , and the dust mass production View the MathML sourcem˙. A new simple two parameter particle size distribution that curtails the effect of particles below 1 μm is developed. The contributions of all particle sizes are summed to get a resulting overall Afρ. The resultant Afρ could not easily be predicted a priori and turned out to be considerably more constraining regarding the mass loss rate than expected. It is found that a proper calculation of Afρ combined with a good Afρ measurement can constrain the dust/gas ratio in the coma of comets as well as other methods presently available. Phase curves of Afρ versus scattering angle are calculated and produce good agreement with observational data. The major conclusions of our calculations are: – The original definition of A in Afρ is problematical and Afρ should be: qsca(n,λ)×p(g)×f×ρqsca(n,λ)×p(g)×f×ρ. Nevertheless, we keep the present nomenclature of Afρ as a measured quantity for an ensemble of coma particles.– The ratio between Afρ and the dust mass loss rate View the MathML sourcem˙ is dominated by the particle size distribution. – For most particle size distributions presently in use, small particles in the range from 0.10 to 1.0 μm contribute a large fraction to Afρ. – Simplifying the calculation of Afρ by considering only large particles and approximating qsca does not represent a realistic model. Mie scattering theory or if necessary, more complex scattering calculations must be used. – For the commonly used particle size distribution, dn/da ∼ a−3.5 to a−4, there is a natural cut off in Afρ contribution for both small and large particles. – The scattering phase function must be taken into account for each particle size; otherwise the contribution of large particles can be over-estimated by a factor of 10. – Using an imaginary index of refraction of i = 0.10 does not produce sufficient backscattering to match observational data. – A mixture of dark particles with i ⩾ 0.10 and brighter silicate particles with i ⩽ 0.04 matches the observed phase curves quite well. – Using current observational constraints, we find the dust/gas mass-production ratio of CG at 1.3 AU is confined to a range of 0.03–0.5 with a reasonably likely value around 0.1.

Pulmonary Vein Isolation Versus Defragmentation: The CHASE-AF Clinical Trial

BACKGROUND Long-term success rates using ablation for persistent atrial fibrillation (AF) are disappointing and usually do not exceed 60%. OBJECTIVES This study sought to compare arrhythmia-free survival between pulmonary vein isolation (PVI) and a stepwise approach (full defrag) consisting of PVI, ablation of complex fractionated electrograms, and additional linear ablation lines in the setting of atrial tachycardias (AT) in patients with persistent AF after PVI. METHODS From November 2010 to February 2013, 205 patients (151 men; 61.7 ± 10.2 years of age) underwent de novo ablation for persistent AF. Subsequently, patients were prospectively randomized to either PVI alone (n = 78) or full defrag (n = 75), with 52 patients not randomized due to AF termination with the original PVI. The primary endpoint was recurrence of any AT after a blanking period of 3 months. RESULTS During the entire study, 241 ablations were performed (mean: 1.59 in the PVI-alone group, 1.55 in the full-defrag group). With the stepwise approach, termination of AF occurred in 45 (60%) patients. However, arrhythmia-free survival did not differ whether patients underwent single or multiple procedures (p = 0.468). Procedure duration, fluoroscopy time, and radiofrequency duration were significantly longer in the full-defrag group (all p < 0.001). CONCLUSIONS A stepwise approach aimed at AF termination does not seem to provide additional benefit over PVI alone in patients with persistent AF, but it is associated with significantly longer procedural and fluoroscopic duration as well as radiofrequency application time. (The Randomized Catheter Ablation of Persist End Atrial Fibrillation Study [CHASE-AF]; NCT01580124).

Buchstäblich wahr! Die Auswanderung der Wiener Juden nach Amerika: Die Angst der armen Juden, verfolgt und mißhandelt zu werden, steigt von Tag zu Tag ...

Welsch (Projektbearbeiter): Befürwortung jüdischer Bestrebungen einer Auswanderung nach Amerika (mit durchaus antisemitischem Hintergrund)

Aus Amerika

Eugen Wolbe