Determination of the best-fit multiphase flow correlation for high water-cut wells using prosper

Pressure drop in a vertical or deviated borehole is mainly due to hydrostatic changes and friction when the produced fluids flow to the surface. When the oil is flowing upwards, the flowing pressure along the tubing string will drop and gas starts to liberate from the oil. Thus, multiphase flow forms in the tubing string. Hence, adequate modeling of vertical lift performance is required to predict the pressure drop and subsequently the wellbore pressure. The bottomhole pressure prediction was realized by using PROSPER, a program developed by Petroleum Experts. The data of oilwell X-01 with high water cut (i.e., 56%) in field X was used in this research work. The most accurate correlation was chosen from 12 selected built-in correlations to predict the pressure drop via gradient matching. A sensitivity analysis has been done to observe the parameters that affected the vertical lift performance of a high water cut well. These parameters were tubing diameter, gas-oil ratio, wellhead pressure, water cut, and tubing roughness. The results show that Dun and Ros original correlation appeared to be the best-fit correlation for well X-01. Results from sensitivity analysis indicated that reduction of wellhead pressure from 390 psi to 285.3 psi could increase liquid rate by 13.2%. An adjustment of wellhead pressure gave the most significant impact on the production rate of well X-01 as compared to other four parameters studied

Chemical genomics reveals histone deacetylases are required for core regulatory transcription

Identity determining transcription factors (TFs), or core regulatory (CR) TFs, are governed by cell-type specific super enhancers (SEs). Drugs to selectively inhibit CR circuitry are of high interest for cancer treatment. In alveolar rhabdomyosarcoma, PAX3-FOXO1 activates SEs to induce the expression of other CR TFs, providing a model system for studying cancer cell addiction to CR transcription. Using chemical genetics, the systematic screening of chemical matter for a biological outcome, here we report on a screen for epigenetic chemical probes able to distinguish between SE-driven transcription and constitutive transcription. We find that chemical probes along the acetylation-axis, and not the methylation-axis, selectively disrupt CR transcription. Additionally, we find that histone deacetylases (HDACs) are essential for CR TF transcription. We further dissect the contribution of HDAC isoforms using selective inhibitors, including the newly developed selective HDAC3 inhibitor LW3. We show HDAC1/2/3 are the co-essential isoforms that when co-inhibited halt CR transcription, making CR TF sites hyper-accessible and disrupting chromatin looping

Relationship between Maternal Clinical Factors and Mother-Reported Child Problems

Maternal depression has been associated with mothers’ elevated reports of child problems. However, it is unclear the extent to which elevations in mother ratings reflect having a depression diagnosis, having any mental illness diagnosis, or having a diagnosis vs. symptom levels. As part of a NIMH-funded, longitudinal study of mothers with serious mental illness ( N =379), we examined the relationship between mother-reported adolescent behavior problems ( N =78) and maternal depression vs. other diagnoses, as well as the effects of depression diagnosis vs. symptom levels. Mothers were recruited from the public mental health system in an urban area, and are primarily African-American and low income. We found that maternal psychiatric symptoms made a unique and significant contribution to explaining the variance in mother-reported child problems, independent of controls (e.g., teacher reports and child demographics), while maternal diagnosis did not. Implications of findings are discussed.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/44321/1/10597_2005_Article_6425.pd

Diosgenin, a Steroidal Saponin, Inhibits Migration and Invasion of Human Prostate Cancer PC-3 Cells by Reducing Matrix Metalloproteinases Expression

BACKGROUND: Diosgenin, a steroidal saponin obtained from fenugreek (Trigonella foenum graecum), was found to exert anti-carcinogenic properties, such as inhibiting proliferation and inducing apoptosis in a variety of tumor cells. However, the effect of diosgenin on cancer metastasis remains unclear. The aim of the study is to examine the effect of diosgenin on migration and invasion in human prostate cancer PC-3 cells. METHODS AND PRINCIPAL FINDINGS: Diosgenin inhibited proliferation of PC-3 cells in a dose-dependent manner. When treated with non-toxic doses of diosgenin, cell migration and invasion were markedly suppressed by in vitro wound healing assay and Boyden chamber invasion assay, respectively. Furthermore, diosgenin reduced the activities of matrix metalloproteinase-2 (MMP-2) and MMP-9 by gelatin zymography assay. The mRNA level of MMP-2, -9, -7 and extracellular inducer of matrix metalloproteinase (EMMPRIN) were also suppressed while tissue inhibitor of metalloproteinase-2 (TIMP-2) was increased by diosgenin. In addition, diosgenin abolished the expression of vascular endothelial growth factor (VEGF) in PC-3 cells and tube formation of endothelial cells. Our immunoblotting assays indicated that diosgenin potently suppressed the phosphorylation of phosphatidylinositide-3 kinase (PI3K), Akt, extracellular signal regulating kinase (ERK) and c-Jun N-terminal kinase (JNK). In addition, diosgenin significantly decreased the nuclear level of nuclear factor kappa B (NF-κB), suggesting that diosgenin inhibited NF-κB activity. CONCLUSION/SIGNIFICANCE: The results suggested that diosgenin inhibited migration and invasion of PC-3 cells by reducing MMPs expression. It also inhibited ERK, JNK and PI3K/Akt signaling pathways as well as NF-κB activity. These findings reveal new therapeutic potential for diosgenin in anti-metastatic therapy

Effectiveness of interventions to improve the health and housing status of homeless people: a rapid systematic review

Background: Research on interventions to positively impact health and housing status of people who are homeless has received substantially increased attention over the past 5 years. This rapid review examines recent evidence regarding interventions that have been shown to improve the health of homeless people, with particular focus on the effect of these interventions on housing status. Methods: A total of 1,546 articles were identified by a structured search of five electronic databases, a hand search of grey literature and relevant journals, and contact with experts. Two reviewers independently screened the first 10% of titles and abstracts for relevance. Inter-rater reliability was high and as a result only one reviewer screened the remaining titles and abstracts. Articles were included if they were published between January 2004 and December 2009 and examined the effectiveness of an intervention to improve the health or healthcare utilization of people who were homeless, marginally housed, or at risk of homelessness. Two reviewers independently scored all relevant articles for quality. Results: Eighty-four relevant studies were identified; none were of strong quality while ten were rated of moderate quality. For homeless people with mental illness, provision of housing upon hospital discharge was effective in improving sustained housing. For homeless people with substance abuse issues or concurrent disorders, provision of housing was associated with decreased substance use, relapses from periods of substance abstinence, and health services utilization, and increased housing tenure. Abstinent dependent housing was more effective in supporting housing status, substance abstinence, and improved psychiatric outcomes than non-abstinence dependent housing or no housing. Provision of housing also improved health outcomes among homeless populations with HIV. Health promotion programs can decrease risk behaviours among homeless populations. Conclusions: These studies provide important new evidence regarding interventions to improve health, housing status, and access to healthcare for homeless populations. The additional studies included in this current review provide further support for earlier evidence which found that coordinated treatment programs for homeless persons with concurrent mental illness and substance misuse issues usually result in better health and access to healthcare than usual care. This review also provides a synthesis of existing evidence regarding interventions that specifically support homeless populations with HIV.Partial funding for this paper was provided to the Effective Public Health Practice Project by the Region of Peel, Canada

Sea level and climatic controls on turbidite occurrence for the past 26 kyr on the flank of the Gaoping Canyon off SW Taiwan

Submarine canyons are major conduits for delivery of sediments originating from the continental margin into the deep sea. Here we analyze the effects of changing sea levels and climate (e.g. sediment supply) on the frequency of turbidites over the last 26 kyr. Our study is based on high resolution age controls for turbidites in core MD178-10-3291 from a water depth of 2070 m on the flank of the Gaoping Canyon offshore in SW Taiwan. Unlike most other submarine canyons worldwide, the head of the Gaoping Canyon has remained connected to the river mouth during the recent flooding of the continental shelf. Our results reveal that turbidity currents are less frequent during periods of sea-level lowstand. In contrast, turbidity currents have been more frequent since ~ 12 kyr BP, during the final stage of rising sea level and sea-level highstands. This may be the result of increased terrestrial sediment delivery due to enhanced rainfall intensity. Moreover, comparing to other source-to-sink systems, the turbidite occurrence in the flank of Gaoping Canyon through the last glacial cycle might have been more strongly influenced by climatic changes due to short sediment storage/response time

Effects of Antipsychotic Medication on Psychiatric Service Utilization and Cost

Background: Based on randomized clinical trials, consensus has been emerging that the first line of treatment for individuals with psychotic disorders should be the newer atypical or second generation antipsychotic medications rather than the older neuroleptics. Given that acquisition costs of atypical antipsychotics are generally higher than typical antipsychotics, uncertainty exists whether the newer atypicals are cost effective alternatives when used in ordinary practice settings. Aims of the Study: The introduction of newer atypical antipsychotic agents has prompted evaluation of their overall effectiveness in reducing health care costs given their higher acquisition costs. This paper focuses on the effects of differing classes of atypical versus typical antipsychotic medications on psychiatric service utilization and cost for persons with serious mental illness treated in usual practice settings. Methods: Descriptive statistics are used to compare patient characteristics, service rates and costs across psychotropic medication groups. Prediction equations employing ordinary least squares regression models are used to explain variation in cost due to pharmacy group membership controlling for demographics, clinical diagnoses and symptoms. Subjects were 338 Medicaid clients with serious mental illness from Florida, Pennsylvania and Oregon treated in ordinary clinical settings. Resource utilization and costs were operationalized using administrative databases to measure consumption of treatment services and pharmaceuticals for a six month period. Results: Inpatient service use was significantly higher for individuals on atypical only and combination atypical/typical medications compared to those on typical medications only, Background: Based on randomized clinical trials, consensus has been emerging that the first line of treatment for individuals with psychotic disorders should be the newer atypical or second generation antipsychotic medications rather than the older neuroleptics. Given that acquisition costs of atypical antipsychotics are generally higher than typical antipsychotics, uncertainty exists whether the newer atypicals are cost effective alternatives when used in ordinary practice settings. Aims of the Study: The introduction of newer atypical antipsychotic agents has prompted evaluation of their overall effectiveness in reducing health care costs given their higher acquisition costs. This paper focuses on the effects of differing classes of atypical versus typical antipsychotic medications on psychiatric service utilization and cost for persons with serious mental illness treated in usual practice settings. Methods: Descriptive statistics are used to compare patient characteristics, service rates and costs across psychotropic medication groups. Prediction equations employing ordinary least squares regression models are used to explain variation in cost due to pharmacy group membership controlling for demographics, clinical diagnoses and symptoms. Subjects were 338 Medicaid clients with serious mental illness from Florida, Pennsylvania and Oregon treated in ordinary clinical settings. Resource utilization and costs were operationalized using administrative databases to measure consumption of treatment services and pharmaceuticals for a six month period. Results: Inpatient service use was significantly higher for individuals on atypical only and combination atypical/typical medications compared to those on typical medications only, Background: Based on randomized clinical trials, consensus has been emerging that the first line of treatment for individuals with psychotic disorders should be the newer atypical or second generation antipsychotic medications rather than the older neuroleptics. Given that acquisition costs of atypical antipsychotics are generally higher than typical antipsychotics, uncertainty exists whether the newer atypicals are cost effective alternatives when used in ordinary practice settings. Aims of the Study: The introduction of newer atypical antipsychotic agents has prompted evaluation of their overall effectiveness in reducing health care costs given their higher acquisition costs. This paper focuses on the effects of differing classes of atypical versus typical antipsychotic medications on psychiatric service utilization and cost for persons with serious mental illness treated in usual practice settings. Methods: Descriptive statistics are used to compare patient characteristics, service rates and costs across psychotropic medication groups. Prediction equations employing ordinary least squares regression models are used to explain variation in cost due to pharmacy group membership controlling for demographics, clinical diagnoses and symptoms. Subjects were 338 Medicaid clients with serious mental illness from Florida, Pennsylvania and Oregon treated in ordinary clinical settings. Resource utilization and costs were operationalized using administrative databases to measure consumption of treatment services and pharmaceuticals for a six month period. Results: Inpatient service use was significantly higher for individuals on atypical only and combination atypical/typical medications compared to those on typical medications only,whereas outpatient use was highest for those on typicals. Furthermore, six-month costs for both pharmacy and psychiatric services were significantly greater for persons in the atypical only ($6528) and combination typical/atypical groups ($6589) compared to those on typicals only ($3463). There were still significantly higher costs associated with atypical only and the combination typical/atypical users after multivariate controls were used. Discussion: This study showed that Medicaid clients in community settings using atypical only and typical/atypical combination medications had the highest costs both in pharmacy and service use when compared to those on typical only medications. However, this study design does not allow us to ascribe a causal relationship between medication group and service costs. Given that olanzapine was the most recent medication in the compendium of available drugs at the time of this study, it is possible that those in the olanzapine only group were failing on other drugs. Caution must be used in drawing policy implications regarding cost effectiveness of newer medications since individuals who are getting the newer atypical or combination medications in community mental health center settings may be unstable on the older medications. Implications for Future Research: A longer follow-up period is needed to determine if the cohort remaining on current atypical medications stabilize over time while those taking the newest drug on the market become the most costly population