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Search Results: 1 - 10 of 2673 matches for " Kecia Harris "
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In Utero Diagnosis of Agenesis of the Ductus Arteriosus in a Twin Pregnancy: An Unusual Case Presentation
Kecia Gaither,Andrea Ardite,Sarita Dhuper
ISRN Obstetrics and Gynecology , 2011, DOI: 10.5402/2011/258431
Abstract:
Phylogeographic Pattern and Extensive Mitochondrial DNA Divergence Disclose a Species Complex within the Chagas Disease Vector Triatoma dimidiata
Fernando A. Monteiro, Tatiana Peretolchina, Cristiano Lazoski, Kecia Harris, Ellen M. Dotson, Fernando Abad-Franch, Elsa Tamayo, Pamela M. Pennington, Carlota Monroy, Celia Cordon-Rosales, Paz Maria Salazar-Schettino, Andrés Gómez-Palacio, Mario J. Grijalva, Charles B. Beard, Paula L. Marcet
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0070974
Abstract: Background Triatoma dimidiata is among the main vectors of Chagas disease in Latin America. However, and despite important advances, there is no consensus about the taxonomic status of phenotypically divergent T. dimidiata populations, which in most recent papers are regarded as subspecies. Methodology and Findings A total of 126 cyt b sequences (621 bp long) were produced for specimens from across the species range. Forty-seven selected specimens representing the main cyt b clades observed (after a preliminary phylogenetic analysis) were also sequenced for an ND4 fragment (554 bp long) and concatenated with their respective cyt b sequences to produce a combined data set totalling 1175 bp/individual. Bayesian and Maximum-Likelihood phylogenetic analyses of both data sets (cyt b, and cyt b+ND4) disclosed four strongly divergent (all pairwise Kimura 2-parameter distances >0.08), monophyletic groups: Group I occurs from Southern Mexico through Central America into Colombia, with Ecuadorian specimens resembling Nicaraguan material; Group II includes samples from Western-Southwestern Mexico; Group III comprises specimens from the Yucatán peninsula; and Group IV consists of sylvatic samples from Belize. The closely-related, yet formally recognized species T. hegneri from the island of Cozumel falls within the divergence range of the T. dimidiata populations studied. Conclusions We propose that Groups I–IV, as well as T. hegneri, should be regarded as separate species. In the Petén of Guatemala, representatives of Groups I, II, and III occur in sympatry; the absence of haplotypes with intermediate genetic distances, as shown by multimodal mismatch distribution plots, clearly indicates that reproductive barriers actively promote within-group cohesion. Some sylvatic specimens from Belize belong to a different species – likely the basal lineage of the T. dimidiata complex, originated ~8.25 Mya. The evidence presented here strongly supports the proposition that T. dimidiata is a complex of five cryptic species (Groups I–IV plus T. hegneri) that play different roles as vectors of Chagas disease in the region.
Numerical Experiments Using MATLAB: Superconvergence of Nonconforming Finite Element Approximation for Second-Order Elliptic Problems  [PDF]
Anna Harris, Stephen Harris, Danielle Rauls
Applied Mathematics (AM) , 2016, DOI: 10.4236/am.2016.717173
Abstract: The superconvergence in the finite element method is a phenomenon in which the fi-nite element approximation converges to the exact solution at a rate higher than the optimal order error estimate. Wang proposed and analyzed superconvergence of the conforming finite element method by L2-projections. However, since the conforming finite element method (CFEM) requires a strong continuity, it is not easy to construct such finite elements for the complex partial differential equations. Thus, the nonconforming finite element method (NCFEM) is more appealing computationally due to better stability and flexibility properties compared to CFEM. The objective of this paper is to establish a general superconvergence result for the nonconforming finite element approximations for second-order elliptic problems by L2-projection methods by applying the idea presented in Wang. MATLAB codes are published at https://github.com/annaleeharris/Superconvergence-NCFEM for anyone to use and to study. The results of numerical experiments show great promise for the robustness, reliability, flexibility and accuracy of superconvergence in NCFEM by L2- projections.
Rectal Duplication Cyst in a 12 year old Female Presenting with Chronic Constipation and Rectal Bleeding: A Case Report  [PDF]
Kimberly Harris, Kishore Vellody
International Journal of Clinical Medicine (IJCM) , 2011, DOI: 10.4236/ijcm.2011.21002
Abstract: Constipation is a common presenting complaint in children. Rectal duplication cysts are rare congenital malformations that need to be considered in patients with chronic constipation that has not responded to typical therapy and in pa-tients presenting with rectal bleeding. It is important to maintain a high index of suspicion when diagnosing this condi-tion as other congenital malformations may be present and rectal duplication cysts have the potential for malignant transformation if they go unrecognized. This case report describes a 12 year old female with chronic constipation and rectal bleeding who was found to have a rectal duplication cyst. It discusses the pathophysiology of the disease and highlights the options available for treatment.
Assessment of a Proposed Software Design for the Solution of Multi-Phase Mechanics Problems on Networked Laptops  [PDF]
Richard Harris, Thomas Impelluso
Intelligent Information Management (IIM) , 2010, DOI: 10.4236/iim.2010.27048
Abstract: This paper presents the design of a computational software system that enables solutions of multi-phase and multi-scale problems in mechanics. It demonstrated how mechanicians can design “process-driven” software systems directly, and that such efforts are more suitable in solving multi-phase or multi-scale problems, rather than utilizing the “data-driven” approaches of legacy network systems. Specifically, this paper demonstrates how this approach can be used to solve problems in flexible dynamics. Then it suggests a view of mechanics algorithms as ‘state equilibrium’ enforcers residing as servers, rather than as computer programs that solve field equations. It puts forth the need for identical input/output files to ensure widespread deployment on laptops. Then it presents an assessment of the laptop platform. A software system such as the one presented here can also be used to supply virtual environments, animations and entertainment/education software with physics.
Determinants of Individual Trust in Global Institutions: The Role of Social Capital and Transnational Identity  [PDF]
Harris H. Kim
Sociology Mind (SM) , 2012, DOI: 10.4236/sm.2012.23036
Abstract: The focus of this paper is to examine the determinants of individual-level trust in global institutional actors, namely the World Bank, the World Trade Organization, and multinational corporations (MNCs). This study is guided by two lines of inquiry. First, consistent with the social capital theory, it investigates the role of social or generalized trust in creating institutional trust. Second, in keeping with the extant literature on economic and cultural globalization, it also probes into how and to what extent transnational identity shapes people’s perception and evaluation of international organizations. Based on the Asian Barometer Survey (2003), a cross-national dataset covering 10 Asian countries (N = 8086), this study finds that both factors significantly shape the level of institutional trust, while controlling for a host of relevant variables. More specifically, logistic regression analyses reveal that the tendency to trust generalized others has a positive association with the degree of trust placed in institutional actors. Transnational identity, on the contrary, has the reverse effect. The implications of the empirical findings and the suggestions for future research are discussed.
How Do Network Size, Voluntary Association, and Trust Affect Civic Engagement? Evidence from the Asian Barometer Survey  [PDF]
Harris H. Kim
Advances in Applied Sociology (AASoci) , 2012, DOI: 10.4236/aasoci.2012.24033
Abstract: This study examines the role of social capital in shaping the individual likelihood of “civic engagement” defined specifically as informal and formal political participation. Based on a subset of the Asian Barometer Survey of Democracy, Governance and Development (2006), a representative cross-national dataset, it examines how and to what extent network size, voluntary association, generalized trust, and particularized trust differentially influence the political behaviors of the survey participants in Korea. The dependent variable is measured in terms of first, discussing political topics in an informal social context and, second, getting together with others in order to raise a political issue or sign a petition. Four independent variables are measured: 1) the size of egocentric network; 2) the membership in voluntary organizations and formal groups; 3) the degree of trust placed in generalized others (i.e., strangers); and 4) the extent to which survey respondents place their trust in particularized others (those with whom one has a personal relationship). Quantitative analyses show that, ceteris paribus, network size and voluntary association have a strong causal impact on both outcome variables. Generalized trust is found to be a non-significant factor, however, while particularized trust has a contingent effect. Along with the interpretation of statistical results, their broad theoretical implications are also discussed.
Metastatic malignant melanoma arising in the ovary: A case report and review of the literature  [PDF]
Amani Harris, Norman Blumenthal
Open Journal of Obstetrics and Gynecology (OJOG) , 2013, DOI: 10.4236/ojog.2013.37A1002
Abstract:

Introduction: This article is a case report of metastatic malignant melanoma to the ovary and a review of the current literature on recommendations for diagnosis and management. Background: Metastatic involvement of the ovary from malignant melanoma is relatively uncommon and represents a diagnostic challenge. There are 74 cases of malignant melanoma metastasing to the ovary reported in the English literature. Malignant melanoma in the ovary is often found at autopsy, as a part of an extensive multisystemic spread of the disease and is rarely diagnosed during life. Most cases reported in the literature thus far occurred in women of reproductive age. Commonly, the history of a primary cutaneous melanoma lesion is remote, and in some cases, absent [1]. Most cases are associated with disseminated disease and carried a dismal prognosis [2].

The Distribution of Returns  [PDF]
David E. Harris
Journal of Mathematical Finance (JMF) , 2017, DOI: 10.4236/jmf.2017.73041
Abstract: The distribution of the returns on investment depends on the rules in the economic system. The article reviews various return distributions, ranging from equity securities in equilibrium, to antiques bought at auction, to debt instruments with uncertain payouts. A general methodology is provided to construct distributions of returns.
Successful Laparoscopically Assisted Transcervical Suction Evacuation of Interstitial Pregnancy following Failed Methotrexate Injection in a Community Hospital Setting
Rani B. Fritz,Neal Rosenblum,Kecia Gaither,Alonzo Sherman,Alwyn McCalla
Case Reports in Obstetrics and Gynecology , 2014, DOI: 10.1155/2014/695293
Abstract: We report on a case of a patient with an early diagnosed cornual ectopic pregnancy following failed methotrexate treatment. The patient was subsequently taken to the operating room for a laparoscopic guided transcervical suction curettage of the cornual ectopic. The surgery was successful and the patient was followed up until her urine pregnancy test was negative. We conclude that in properly selected patients, cornual ectopic pregnancy may be treated with transcervical suction curettage. 1. Introduction Interstitial pregnancy, commonly referred to as cornual pregnancy, is a rare form of tubal pregnancy accounting for approximately 2–4% of tubal pregnancies [1]. The incidence of interstitial pregnancies is on the rise presumably due to the increase in assisted reproductive technologies [2]. Early diagnosis of interstitial ectopic pregnancies is crucial, as they often remain asymptomatic until rupture occurs and carry a mortality rate as high as 2.5% [3]. Historically, diagnosis of interstitial ectopic pregnancy was most often made intraoperatively in an emergent fashion, following patient presentation with an acute abdomen and/or shock [4]. This would lead to either an interstitial resection or a hysterectomy. With advances in sensitive beta human chorionic gonadotropin (BHCG) assays and ultrasound technologies, earlier diagnosis of interstitial pregnancy is being made. Despite these advances, a large portion of interstitial pregnancies are treated with interstitial resection, even when treated laparoscopically [3]. Removal of the interstitial portion of the uterus carries potential complications in subsequent pregnancies including risks of uterine rupture [5]. Patients with previous interstitial resection will likely undergo elective cesarean section in subsequent pregnancies due to fear of rupture. We report a case of an early diagnosed interstitial pregnancy treated with laparoscopic guided transcervical evacuation following intramuscular methotrexate administration. 2. Case Report The patient was a 37?y/o gravida 7 para 3033 and presented for an ultrasound due to a positive urine pregnancy and vaginal spotting. She stated that her last menstrual period was approximately 7-weeks prior. Aside from vaginal spotting, the patient denied abdominal tenderness or any other complaints. Her past obstetrical history was significant for a full-term normal spontaneous vaginal delivery followed by 2 full-term cesarean sections that were uncomplicated. She had two elective terminations of pregnancy and one first trimester spontaneous abortion. Her gynecological
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