1,721,103 research outputs found
Building an organizational decision support system for Korea Telecom: A process redesign approach
No full textOrganizational decision support systems (ODSSs) are a new type of decision support systems (DSSs) focusing on organization-wide issues rather than individual, group, or departmental issues. Because of its organization-wide scope, a typical ODSS cuts across organizational functions or hierarchical layers. Thus, seamless integration with organization's diverse IS applications running on heterogeneous platforms becomes a critical issue for building a successful ODSS. In this paper, we analyzed the Korea Telecom's (KT) Operations & Maintenance (O&M) division focusing on its investment strategies. We developed a conceptual framework through process redesign, which links O&M investment decisions to performance of its operational branches across the nation. To support the above framework, we also developed a prototype for the KTOM-ODSS with an EIS-like user-friendly interface. When a complete ODSS is implemented on top of various KT transaction processing systems, it will become a critical component of the O&M Integrated Decision Support Environment (IDSE). (C) 1997 Elsevier Science B.V
On the microstructure and optical properties of Ba0.5Sr0.5TiO3 films
No full textThin films of Ba1-xSrxTiO3 (x = 0.5) are prepared on the (1 (1) over bar 02) plane of sapphire substrates with the pulsed laser deposition technique. Crystallographic studies show that the films are polycrystalline with a strong reflection along the (111) plane. Scanning electron micrographs reveal smooth surfaces. The index of refraction and the absorption coefficient are determined at room temperature in the wavelength range 382-800nm from spectrophotometer measurements of the transmittance at normal incidence, using the method devised by Swanepoel. The average value of the refractive index is found to be 2.06 in the visible spectrum, whereas higher values near the UV are associated with the fundamental bandgap absorption. The dispersion of the refractive index is interpreted in terms of a single electronic oscillator at 7.16 eV. The direct bandgap energy is found to be 3.96 eV. (C) 1997 Elsevier Science S.A.X14
Selection criteria and colpotomic approach for safe minimally invasive radical hysterectomy in early-stage cervical cancer
Full text linkOBJECTIVE: To evaluate oncologic outcomes of minimally invasive radical hysterectomy (RH) in early cervical cancer before and after the application of parametrial invasion (PMI) criterion on magnetic resonance imaging (MRI) and vaginal colpotomy (VC). METHODS: A total of 216 International Federation of Gynecology and Obstetrics stage IB-IIA cervical cancer patients who underwent minimally invasive RH was identified between April 2006 and October 2018. Patients were classified into the pre-PMI intracorporeal or VC (IVC) (n=117) and post-PMI VC groups (n=99). In the pre-PMI IVC group, PMI criterion (intact stromal ring) on MRI was not applied and the patients received IVC. In the post-PMI VC group, surgical candidates were selected using the PMI criterion on MRI and all patients received VC only. Oncologic outcomes and prognostic factors associated with disease recurrence were analyzed. RESULTS: The rate of positive vaginal cuff margins in the pre-PMI IVC group was higher than that in the post-PMI VC group (11.1% vs. 1.0%, p=0.003). Two-year disease-free survival was different between the 2 groups (84.5% in pre-PMI IVC vs. 98.0% in post-PMI VC groups, p=0.005). Disrupted stromal ring on MRI (hazard ratio [HR]=20.321; 95% confidence interval [CI]=4.903-84.218; p<0.001) and intracorporeal colpotomy (HR=3.059; 95% CI=1.176-7.958; p=0.022) were associated with recurrence. CONCLUSION: The intact cervical stromal ring on MRI might identify the low-risk group of patients in terms of PMI and lymphovascular/stromal invasion in early cervical cancer. Minimally invasive RH should be performed in optimal candidates with an intact stromal ring on MRI, using VC
Comparison of posterior rectal dissection techniques during rectosigmoid colon resection as part of cytoreductive surgery in patients with epithelial ovarian cancer: Close rectal dissection versus total mesorectal excision
No full textOBJECTIVE: The aim of this study was to evaluate the clinical outcomes of close rectal dissection (CRD) compared with those of total mesorectal excision (TME) as the posterior rectal dissection procedure during rectosigmoid colectomy performed as part of cytoreductive surgery in patients with epithelial ovarian cancer.
METHODS: We retrospectively reviewed the medical records of 163 patients who underwent posterior rectal dissection for rectosigmoid resection, including low anterior resection or subtotal colectomy, as part of ovarian cancer surgery from 2006 to 2018. The TME technique was mainly performed by colorectal surgeons, and the CRD technique preserving the mesorectal tissue was performed by an experienced gynecologic oncology surgeon. The patients were divided into the TME group and the CRD group, and their clinical outcomes were analyzed.
RESULTS: A total of 163 patients with ovarian cancer underwent rectosigmoid colon resection. Among the patients, 87 (53.4%) underwent CRD and 76 (46.6%) underwent TME as the posterior rectal dissection technique. The disease severity according to FIGO stage (p=.390) and the residual disease status (p=.412) were not statistically different between the 2 groups. However, the postoperative incidences of anastomotic leakage (p=.045) and prolonged ileus (>7days, p=.055) were higher in the TME group. The pelvic recurrence rate and progression-free survival did not differ between the 2 groups (p=.663 and .790, respectively).
CONCLUSIONS: Considering the perioperative outcomes, CRD may be an alternative technique for rectal dissection in ovarian cancer with less perioperative morbidity and equivalent oncologic outcomes
The effect of electrolytes on the discharge properties of sulfur electrode for Li/S cells
No full text
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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