Existing backoff scheme’s optimization of IEEE 802.11 DCF MAC protocol consider only saturated networks or asymptotic conditions. In real situations, traffic is bursty or streamed at low rates so that stations do not operate usually in saturated regime. In this work, we propose and analyze a backoff enhancement for IEEE802.11 DCF that requires information only about the network size and that is...

Diclofenac (DCF) is a widely used nonsteroidal anti-inflammatory drug that is regularly detected in surface waters. To support a robust aquatic risk assessment, two early life stage (ELS) tests, compliant with the Organisation for Economic Co-operation and Development (OECD) test guideline 210, were conducted in rainbow trout and in zebrafish. Population relevant endpoints, such as hatching, gr...

This paper proposes a new protocol called Optimal DCF (ODCF). Inspired by a sequence of analytic results, O-DCF modifies the rule of adapting CSMA parameters, such as backoff time and transmission length, based on a function of the demand-supply differential of link capacity captured by the local queue length. Unlike clean-slate design, O-DCF is fully compatible with 802.11 hardware, so that it...

This study investigated the effects of two types of written feedback – direct corrective feedback (DCF) and metalinguistic explanation (ME) - on Iranian EFL learners’ implicit and explicit knowledge of English definite and indefinite articles. Assigned to three groups of DCF, ME, and control groups, the participants took four tests in three testing phases: pretest, posttest, and delayed posttes...

Docetaxel, cisplatin, and 5-fluorouracil (DCF) significantly improved overall survival in metastatic gastroesophageal adenocarcinoma (GEA). The aim of this study was to assess efficacy of DCF regimen as perioperative chemotherapy compared with surgery alone in patients with resectable GEA. We identified 789 patients who underwent surgery alone and 62 patients who received at least one cycle of ...

39 40 Small intestinal ulceration, bleeding, and inflammation are major adverse effects 41 associated with the use of diclofenac (DCF) or other nonsteroidal anti-inflammatory 42 drugs (NSAIDs). The underlying mechanisms of DCF enteropathy are poorly understood, 43 but there is increasing evidence that topical effects are involved. The aim of this study 44 was to explore the role of c-Jun-N-term...

Interferon-alpha and the adenosine deaminase (ADA) inhibitor deoxycoformycin (dCF) have each been shown to be efficacious in the treatment of some lymphoid malignancies and to have potent antiproliferative activities in vitro. This study examined whether dCF and recombinant interferon-alpha A (rIFN-alpha A) were additive, synergistic, or antagonistic in their effects on the cultured B lymphobla...

A influência do pH na degradação do fármaco diclofenaco (DCF) por processo foto-Fenton/ solar foi avaliada usando o complexo citrato de amônio e ferro(III) (FecitNH4). Embora a eficiência de degradação diminua com o aumento do pH (no intervalo de pH de 5 a 8), a concentração de DCF ficou abaixo do limite de detecção após 45 min de irradiação enquanto que 77% do carbono orgânico total foi removi...

Lynch syndrome is caused by germline mutations of DNA mismatch repair (MMR) genes, most frequently MLH1 and MSH2. Recently, MMR-deficient crypt foci (MMR-DCF) have been identified as a novel lesion which occurs at high frequency in the intestinal mucosa from Lynch syndrome mutation carriers, but very rarely progress to cancer. To shed light on molecular alterations and clinical associations of ...