Four different fluid model formulations have been recently developed for Gt/GI/N+ GI queues, including a two-parameter fluid model in Whitt (2006) by tracking elapsed service and patience times of each customer, a measure-valued fluid model in Kang and Ramanan (2010) and its extension in Zuñiga (2014) by tracking elapsed service and patience times of each customer, and a measure-valued fluid mo...

Around 2–4 in 1,000 people in Northern Europe have ulcerative colitis or Crohn’s disease (Rubin 2000). Both are chronic, relapsing, inflammatory disorders of the gastrointestinal tract with several shared clinical features, but with largely distinct risk factors, genetic, immunological, anatomical and histological features, and response to therapy (DTB 2003). Their treatment, which includes med...

Next generation middleware must support applications in the face of increasing diversity in interaction paradigms, end system types and network styles. Therefore, to secure applications, security policies must be configured and indeed reconfigured at runtime. In this paper, we propose an approach combining the openness of reflective middleware with the flexibility of programmable security to me...

Motivated by applications to service systems, we develop simple engineering approximation formulas for the steady-state performance of heavily-loaded G/GI/n+GI multi-server queues, which can have non-Poisson and non-renewal arrivals and non-exponential service-time and patience-time distributions. The formulas are based on recently established Gaussian manyserver heavy-traffic limits, but invol...

Although gastrointestinal involvement by metastatic malignant melanoma is common but primary gastrointestinal (GI) melanoma has been reported in rare cases. In this study we report two cases of primary gastrointestinal malignant melanoma that one of them is a known case of neurofibromatosis type 1(NF1). Both cases showed no evidence of any lesions in skin and eye. Malignant melanoma of GI tract...

Proposition. Let G be a group and (Gi, i ∈ I) a family of subgroups of G. If (i) for each i, j ∈ I there exists k ∈ I with 〈Gi, Gj〉 ≤ Gk, and (ii) Gi is simple for all i ∈ I, then H = ⋃ i∈I Gi is a simple subgroup of G. Proof. Choose i, j ∈ I. Observe that (ii) implies Gi, Gj 6= ∅ because the definition of a simple group excludes this possibility. Clearly, Gi is a group and a subset of 〈Gi, Gj〉...

Correction After the publication of our article [1], we found that a few errors were introduced during the production process. The mathematical definition of expanded temporal block given in Definition 3 (Expanded temporal block) should have been “the corresponding expanded temporal block Bi = {Gi , T∗ i |Gi ⊆ I, Gi ⊇ Gi, T∗ i = Ti} satisfies: ∀x ∈ Gi , ∃y ∈ Gi, s.t. Cx,y ≥ p” rather than “the ...

The incidence and prevalence of diabetes mellitus and its complications are increasing. Like other complications, most of the diabetes patients have gastrointestinal (GI) symptoms but in majority of cases GI complications are under diagnosed and not treated properly, resulting in impairment of the quality of daily life. GI system including liver and pancreas are involved in diabetes mellitus. ...

Introduction: Biological Width is needed to maintain the health of gingiva around teeth that need restoration. Crown Lengthening (CL) surgery can be used to prevent  invading the BW by sub-gingival restoration. The aim of this study was to evaluate gingival indices before and after CL surgery. Materials and Methods: In this analytical-longitudinal study, 23 teeth of 18  patients referred to ...

introduction: elective upper and lower gi endoscopy is usually performed in children on an outpatient basis with the child under sedation or general anesthesia (ga). the objective of this study was to describe anesthesia related complications in   children undergoing elective gi endoscopy.   materials and methods: the study design was descriptive on 1388 patients undergoing elective gi endoscop...