The Cover Feature shows the nighttime reactions of dinitrogen pentoxide (N2O5) with chloride (Cl−) and water at surface sea spray aerosols. In this work we identify 3 reaction mechanisms in competition between Cl− substitution hydrolysis N2O5 via quantum chemical dynamics studies model clusters. these aerosol interfaces significantly affects atmospheric levels O3, NOx, OH. design by Jami Butler...

In this paper we consider a risk model with two independent classes of insurance risks in the presence multi-layer dividend strategy. We assume that both claim number processes are renewal phase-type inter-arrival times. By analysing Markov chains associated given distributions times, algorithmic schemes for determination explicit expressions Gerber–Shiu expected discounted penalty function, as...

Isolated ruptures of the subscapularis and anterosuperior rotator cuff lesions are encountered more rarely than supraspinatus or anteroposterior rotator cuff tears. In certain circumstances, reconstruction of the tendon may not be possible due to fatty degeneration and atrophy of the subscapularis muscle or poor tendon quality. Tendon transfer may represent the only surgical option for treatmen...

Kelvin J. A. Davies,* Gennady Ermak,* Beverley A. Rothermel, Melanie Pritchard, Joseph Heitman, Joohong Ahnn, Flavio Henrique-Silva, Dana Crawford, Silvia Canaider,** Pierluigi Strippoli,** Paolo Carinci,** Kyung-Tai Min, Deborah S. Fox, Kyle W. Cunningham, Rhonda Bassel-Duby, Eric N. Olson, Zhuohua Zhang, R. Sanders Williams, Hans-Peter Gerber,*** Mercè Pérez-Riba, Hisao Seo, Xia Cao, Claude B...

The purpose of this article is to provide, with the help of a fluctuation identity, a generic link between a number of known identities for the first passage time and overshoot above/below a fixed level of a Lévy process and the solution of Gerber and Shiu (1994), Boyarchenko and Levendorskǐi (1998, 1999, 2002), Chan (2000), Avram et al. (2002), Mordecki (2002), Asmussen et al. (2004) and Chesn...

Weconsider aMarkov additive process (MAP)with phase-type jumps, starting at 0. Given a positive level u, we determine the joint distribution of the undershoot and overshoot of the first jump over the level u, the maximal level before this jump, the time of attaining this maximum, and the time between the maximum and the jump. The analysis is based on first passage times and time reversion of MA...

Rachael Ross, MPH; Jeffrey S. Gerber, MD, PhD; Susan Rettig, BSN, CIC; Robert Grundmeier, MD; Heather Brouwer, BS; Christina Irace, BS; Russell Localio, PhD; Susan E. Coffin, MD, MPH; The Children’s Hospital of Philadelphia, Philadelphia, PA; Department of Pediatrics, Division of Infectious Diseases, The Children’s Hospital of Philadelphia, Philadelphia, PA; Infection Prevention and Control, Th...

Infection: a pediatric ambulatory surgery cohort study Christina Irace, BS; Heather Brouwer, BS; Rachael Ross, MPH; Matthew Miller, BS; Robert Grundmeier, MD; Susan Rettig, BSN, CIC; Jeffrey S. Gerber, MD, PhD; Susan E. Coffin, MD, MPH; The Children’s Hospital of Philadelphia, Philadelphia, PA; General Pediatrics, The Children’s Hospital of Philadelphia, Philadelphia, PA; Infection Prevention a...

We consider a risk model described by an ergodic stationary marked point process. The model is perturbed by a Lévy process with no downward jumps. The (modified) ladder height is defined as the first epoch where an event of the marked point process leads to a new maximum. Properties of the process until the first ladder height are studied and results of Dufresne and Gerber [Insurance: Math. Eco...