scholarly journals The Spectral Ice Habit Prediction System (SHIPS). Part III: Description of the Ice Particle Model and the Habit-Dependent Aggregation Model

2011 ◽  
Vol 68 (6) ◽  
pp. 1125-1141 ◽  
Author(s):  
Tempei Hashino ◽  
Gregory J. Tripoli
Keyword(s):  
Terminal Velocity ◽  
Crystal Habit ◽  
Particle Model ◽  
Prediction System ◽  
Aggregation Process ◽  
Cross Sectional ◽  
Growth History ◽  
History Of ◽  
Model Setup ◽  
Simple Growth

Abstract The purpose of this paper is to describe a numerical scheme of the Spectral Ice Habit Prediction System (SHIPS) that simulates the dependency of aggregation process explicitly on crystal habit and size in cloud-resolving models (CRMs). The sizes and shapes of ice crystals are known to modulate the aggregation process, which is a critical part of physical processes leading to precipitation in addition to vapor deposition and riming processes. A problem with conventional formulation of aggregation process in CRMs is that it is not designed to predict the aggregates’ properties based on the information on crystals. To simulate such dependency, SHIPS solves a quasi-stochastic model that describes growth tendency for a group of particles, together with particle property variables (PPVs) that carry information on habit and types of ice particles. SHIPS diagnoses the ice particle properties based on the PPVs for each mass bin at given a time and space, which are used to calculate the collision cross-sectional area and terminal velocity differences based on crystal habits explicitly. To achieve prediction of properties of aggregates and rimed particles, SHIPS introduces 1) the use of a conceptually based, circumscribing shape, called the ice particle model, and 2) the explicit prediction of the circumscribing sphere volume based on a simple growth model of the maximum dimension. Based on these properties, SHIPS is able to predict the mass–dimensional relationships of aggregates so that they are physically consistent with the growth history of the particles. In addition, the information about the crystals making up the aggregates is predicted. Part IV of this series will present the results and evaluation of the application of this formulation to idealized tests in a Lagrangian “box model” setup.

scholarly journals The Spectral Ice Habit Prediction System (SHIPS). Part IV: Box Model Simulations of the Habit-Dependent Aggregation Process

2011 ◽  
Vol 68 (6) ◽  
pp. 1142-1161 ◽  
Author(s):  
Tempei Hashino ◽  
Gregory J. Tripoli
Keyword(s):  
Particle Size ◽  
Simple Model ◽  
Terminal Velocity ◽  
Crystal Habit ◽  
Size Distributions ◽  
Prediction System ◽  
Aggregation Process ◽  
Particle Size Distributions ◽  
Particle Properties ◽  
Aggregation Processes

Abstract The purpose of this paper is to assess the prediction of particle properties of aggregates and particle size distributions with the Spectral Ice Habit Prediction System (SHIPS) and to investigate the effects of crystal habits on aggregation process. Aggregation processes of ice particles are critical to the understanding of precipitation and the radiative signatures of cloud systems. Conventional approaches taken in cloud-resolving models (CRMs) are not ideal to study the effects of crystal habits on aggregation processes because the properties of aggregates have to be assumed beforehand. As described in Part III, SHIPS solves the stochastic collection equation along with particle property variables that contain information about crystal habits and maximum dimensions of aggregates. This approach makes it possible to simulate properties of aggregates explicitly and continuously in CRMs according to the crystal habits. The aggregation simulations were implemented in a simple model setup, assuming seven crystal habits and several initial particle size distributions (PSDs). The predicted PSDs showed good agreement with observations after rescaling except for the large-size end. The ice particle properties predicted by the model, such as the mass–dimensional (m-D) relationship and the relationship between diameter of aggregates and number of component crystals in an aggregate, were found to be quantitatively similar to those observed. Furthermore, these predictions were dependent on the initial PSDs and habits. A simple model for the growth of a particle’s maximum dimension was able to simulate the typically observed fractal dimension of aggregates when an observed value of the separation ratio of two particles was used. A detailed analysis of the collection kernel indicates that the m-D relationship unique to each crystal habit has a large impact on the growth rate of aggregates through the cross-sectional area or terminal velocity difference, depending on the initial equivalent particle distribution. A significant decrease in terminal velocity differences was found in the inertial flow regime for all the habits but the constant-density sphere. It led to formation of a local maximum in the collection kernel and, in turn, formed an identifiable mode in the PSDs. Remaining issues that must be addressed in order to improve the aggregation simulation with the quasi-stochastic model are discussed.

Suicidal Ideation Among Medical Students in Dammam, Saudi Arabia

Crisis ◽  
2020 ◽  
pp. 1-6
Author(s):  
Mohammed Madadin ◽  
Ritesh G. Menezes ◽  
Maha A. Alassaf ◽  
Abdulaziz M. Almulhim ◽  
Mahdi S. Abumadini ◽  
...  
Keyword(s):  
Saudi Arabia ◽  
Medical Students ◽  
Suicidal Ideation ◽  
General Health Questionnaire ◽  
Cross Sectional Study ◽  
Eastern Province ◽  
Cross Sectional ◽  
The Past ◽  
Depression Subscale ◽  
History Of

Abstract. Background: Medical students are at high risk of suicidal ideation. Aim: We aimed to obtain information on suicidal ideation among medical students in Dammam located in the Eastern Province of Saudi Arabia. Method: This cross-sectional study was conducted at the College of Medicine affiliated with Imam Abdulrahman Bin Faisal University in the Eastern Province of Saudi Arabia. Suicidal ideation in the past 12 months was assessed based on responses to four questions in the depression subscale of the General Health Questionnaire 28 (GHQ-28). In addition, data were collected to examine the association of suicidal ideation with various factors. Results: We found that 1 in 3 medical students in the study had suicidal ideation in the past 12 months, while around 40% had lifetime suicidal ideation. Suicidal ideation was associated with feelings of parental neglect, history of physical abuse, and dissatisfaction with academic performance. Limitations: The cross-sectional nature of this study limits its ability to determine causality regarding suicidal ideation. Conclusion: These rates are considerably high when compared with rates from studies in other countries around the world. This study provides a reference in the field of suicidology for this region of Saudi Arabia.

External Validity of SCORS-G Ratings of Thematic Apperception Test Narratives in a Sample of Outpatients and Inpatients

2015 ◽  
Vol 36 (1) ◽  
pp. 58-81 ◽  
Author(s):  
Michelle B. Stein ◽  
Jenelle Slavin-Mulford ◽  
Caleb J. Siefert ◽  
Samuel Justin Sinclair ◽  
Michaela Smith ◽  
...  
Keyword(s):  
Life Events ◽  
Psychiatric Hospitalization ◽  
Clinical Care ◽  
Thematic Apperception Test ◽  
Clinical Samples ◽  
Cross Sectional ◽  
Conduct Disordered ◽  
Global Ratings ◽  
Thematic Apperception ◽  
History Of

Abstract. The Social Cognition and Object Relations Scale-Global Ratings Method (SCORS-G; Stein, Hilsenroth, Slavin-Mulford, & Pinsker-Aspen, 2011 ) is a reliable system for coding narrative data, such as Thematic Apperception Test (TAT) stories. This study employs a cross-sectional, correlational design to examine associations between SCORS-G dimensions and life events in two clinical samples. Samples were composed of 177 outpatients and 57 inpatients who completed TAT protocols as part of routine clinical care. Two experienced raters coded narratives with the SCORS-G. Data on the following clinically relevant life events were collected: history of psychiatric hospitalization, suicidality, self-harming behavior, drug/alcohol abuse, conduct-disordered behavior, trauma, and education level. As expected, the clinical life event variable associated with the largest number of SCORS-G dimensions was Suicidality. Identity and Coherence of Self was related to self-harm history across samples. Emotional Investment in Relationships and Complexity of Representations were also associated with several life events. Clinical applications, limitations of the study, and future directions are reviewed.

DYSLIPIDEMIA IN THYROID DISORDERS

2020 ◽  
Vol 4 (7) ◽  
Author(s):  
Kashish Narula ◽  
Narendra Kumar Dara ◽  
Shyam Lal Meena
Keyword(s):  
Lipid Metabolism ◽  
Thyroid Dysfunction ◽  
Cross Sectional Study ◽  
Control Group ◽  
Thyroid Disorders ◽  
Cross Sectional ◽  
Carbohydrate And Lipid Metabolism ◽  
History Of ◽  
Thyroid Profile ◽  
Basal Energy Expenditure

Background: Thyroid hormones influence nearly all major metabolic pathways. Their most obvious and well-known action is the increase in basal energy expenditure obtained by acting on protein, carbohydrate and lipid metabolism. The lipid metabolism is more influenced by the thyroid hormone. Methods: A cross-sectional study was conducted on 100 patients with suspicion of thyroid disorders were taken as cases. One hundred patients with normal thyroid profile and no history of other chronic diseases were taken as control group. Results: The serum TC, TG and LDL levels in hypothyroid individuals (both overt and subclinical) were significantly higher than euthyroid subjects but the levels were comparable between hyperthyroid and euthyroid group. Conclusion: Dyslipidemias are associated with thyroid disorders, so biochemical screening for thyroid dysfunction in all dyslipidemic patients. Therefore, patients presenting with dyslipidemia are recommended for investigation to explore thyroid dysfunction. Keywords: Thyroid profile, Total cholesterol, Triglycerides and LDL

Demographic Factors Associated with Congenital Malformations Among Young Infants in Fallujah Maternity and Children Hospital, Fallujah City, Iraq

2020 ◽  
pp. 1-5
Author(s):  
Samira T.Abdulghani ◽  
Samira T.Abdulghani
Keyword(s):  
Developing Countries ◽  
Congenital Anomalies ◽  
Prevalence Rate ◽  
Gestational Hypertension ◽  
Heart Defects ◽  
Demographic Factors ◽  
Cross Sectional ◽  
Factors Associated ◽  
Young Infants ◽  
History Of

Background: Congenital anomalies are a major cause of infant morbidity and mortality in developing countries including our country. Registries and data on these anomalies are still primitive and poorly collated. In this study we aimed to assess the important demographic factors associated with the development of congenital anomalies. Methods: This was a cross-sectional hospital-based study involving 880 infants in the 1st year of life registered in the birth defect unit in Fallujah Maternity and Children Hospital in the period between 1st of January 2017 to the 31st of December 2019. The prevalence rate, the pattern of anomalies and the factors associated with their occurrence were determined. Results: The prevalence rate of the group enrolled in this study was 31/1000 total births, congenital heart defects was the commonest followed by central nervous system anomalies, 58% of the infants were males, 65% had ≥ 2.5 kg birth weight & 95% were singletons. Family history of congenital anomalies was found in 31.25% of cases. The largest group of mothers (55.7%) were 21-30 years old & 92.5% of fathers were less than 45 years old. Parental consanguinity reported in 64.3% of the total cases. Only 4.5% of mothers reported history of fever during pregnancy, and none of them had history of exposure to x-ray or teratogenic drug use. Gestational hypertension was reported in 10% of the total (880) mothers, hypertension and diabetes mellitus in 0.3%, while hepatitis C, hepatitis B, toxoplasmosis and epilepsy, each was reported in only one mother (0.1% of the total). Regarding the outcome of pregnancy, 66.6% were live births, 24.2% were abortions and 9.2% were stillbirths. History of previous abortions was reported in 22% of cases. Urban residents accounted for 63% of the families of congenitally abnormal infants while 37% were rural. Conclusion: Congenital anomalies are still a major cause for concern and tension in Fallujah society, there is serious need to establish a surveillance and good statistical system for congenital anomalies and efforts should be made to raise awareness of their occurrence and the associated risk factors in Iraq and other developing countries.

Uncertainty about cellulitis and unmet patient information needs: a mixed methods study

2018 ◽  
Vol 68 (suppl 1) ◽  
pp. bjgp18X697349
Author(s):  
Anna Lalonde ◽  
Emma Teasdale ◽  
Ingrid Muller ◽  
Joanne Chalmers ◽  
Peter Smart ◽  
...  
Keyword(s):  
Mixed Methods ◽  
Information Needs ◽  
Qualitative Data ◽  
Information Provision ◽  
Mixed Methods Study ◽  
Cross Sectional Survey ◽  
Cross Sectional ◽  
Face To Face ◽  
Patient Information Needs ◽  
History Of

BackgroundCellulitis is a common painful infection of the skin and underlying tissues that recurs in approximately a third of cases. Patients’ ability to recover from cellulitis or prevent recurrence is likely to be influenced by their understanding of the condition.AimTo explore patients’ perceptions of cellulitis and their information needs.MethodMixed methods study comprising semi-structured, face-to-face interviews and cross-sectional survey, recruiting through primary care, secondary care and advertising. Adults aged 18 or over with a history of cellulitis (first or recurrent) were invited to complete a survey, take part in an interview or both. Qualitative data was analysed thematically.ResultsThirty interviews were conducted between August 2016 and July 2017. Qualitative data revealed low prior awareness of cellulitis, uncertainty around diagnosis, concern/surprise at the severity of cellulitis, and perceived insufficient information provision. People were surprised they had never heard of the condition and that they had not received advice or leaflets giving self-care information. Some sought information from the internet and found this bewildering. Two hundred and forty surveys were completed (response rate 17%). These showed that, while most people received information on the treatment of cellulitis (60.0%, n = 144), they reported receiving no information about causes (60.8%, n = 146) or prevention of recurrence (73.3%, n = 176).ConclusionThere is a need for provision of basic information for people with cellulitis, particularly being informed of the name of their condition, how to manage acute episodes, and how to reduce risk of recurrence.

Gambaran Pengetahuan Remaja Tentang Ca Serviks Dan Perilaku Pencegahan Ca Serviks Di Sma Negeri Tebing Tinggi Empat Lawang Tahun 2016

2019 ◽  
Vol 6 (1) ◽  
Author(s):  
Yuni Kurniati Yuni Kurniati
Keyword(s):  
Cervical Cancer ◽  
World Health Organization ◽  
Cancer Incidence ◽  
World Health ◽  
Cervical Cancer Incidence ◽  
Cross Sectional ◽  
History Of ◽  
Unhealthy Diet ◽  
Birth Control Pills ◽  
Health Organization

ABSTRACT   According to the World Health Organization (WHO), every two minutes a woman dies of cervical cancer in develoving countries. In Indonesia, new cases of cervical cancer is 40-45 cases of day. It is estimated every hour, a women died of cervical center. At the general hospital center Dr. Mohammad Hoesin Palembang, the incidence of women who had cervical cancer incidence year 2011 women who had cervical cancer incidence are 34 people (48,2%). The following factors increase the chance of cervical cancer in women is infection of Human Papilloma Virus (HPV), sexsual behavior, family history of cervical cancer, age, mechanism of how oral contraceptives, smoking, income or socioeconomic status, race , unhealthy diet, the cell abnormal, parity, use of the drug DES (Dietilsbestrol), and birth control pills. The purpose of this study is known of adolescents about cervical cancer in SMA Tebing Tinggi Empat Lawang year 2016. This study used Analytic Survey with Cross Sectional approach. The population in this study were all young women students in SMA Tebing Tinggi Empat Lawang with the number of 171 respondents. The results showed there were 171 respondents (37.5%) of respondents were knowledgeable, and (62.52%) of respondents who are knowledgeable unfavorable. These results indicate that knowledgeable either less than those less knowledgeable in both the SMA Tebing Tinggi Empat Lawang Year 2016. From these results, it is expected that more teens can know about cervical cancer so that it can add a lot of insight and knowledge.     ABSTRAK   Menurut data World Health Organization (WHO), setiap dua menit wanita meninggal dunia karena kanker serviks dinegara berkembang. Di Indonesia, kasus baru kanker serviks 40-45 kasus perhari. Di perkirakan setiap satu jam, seorang perempuan meninggal dunia karena kanker serviks. Di rumah sakit umum pusat Dr. Mohammad Hoesin Palembang, angka kejadian ibu yang mengalami kanker serviks pada tahun 2011 ibu yang mengalami kejadian kanker serviks terdapat 34 orang (48,2%). Faktor-faktor berikut meningkat kan peluang kanker serviks pada wanita yaitu infeksi Human Papiloma virus (HPV), perilaku seks, riwayat keluarga kanker serviks, umur ,mekanisme bagaimana kontrasepsi peroral, merokok, pendapatan atau status social ekonomi, ras, diet tidak sehat, adanya sel abnormal, paritas, menggunakan obat DES (Dietilsbestrol),dan pil KB. Tujuan penelitian ini adalah Diketahuinya pengetahuan remaja tentang Ca Cerviks di SMA Negeri Tebing Tinggi Empat Lawang Tahun 2016. Penelitian ini menggunakan metode survey  analitik dengan pendekatan cross sectional. Populasi pada penelitian ini adalah semua siswi remaja putri di SMA Negeri Tebing Tinggi Empat Lawang dengan jumlah 171 responden.Hasil penelitian menunjukkan dari 171 responden terdapat(37.5 %) responden yang berpengetahuan baik, dan (62.52  %) responden yang berpengetahuan kurang baik. Hasil penelitian ini menunjukan bahwa yang berpengetahuan baik lebih sedikit dibandingkan dengan  yang berpengetahuan kurang baik di SMA Negeri Tebing Tinggi Empat Lawang Tahun 2016. Dari hasil penelitian ini, Diharapkan remaja bisa lebih banyak mengetahui tentang caserviks sehingga dapat menambah banyak wawasan dan pengetahuan.    

Metabolic Syndrome in HIV-patients in Antiretroviral Therapy

2020 ◽  
Vol 18 (6) ◽  
pp. 388-395
Author(s):  
Daniel Vargas-Pacherrez ◽  
Helma P. Cotrim ◽  
Leonardo Pires ◽  
Vitor Cunha ◽  
Vitor Coelho ◽  
...  
Keyword(s):  
Metabolic Syndrome ◽  
Antiretroviral Therapy ◽  
International Diabetes Federation ◽  
Cross Sectional Study ◽  
People Living With Hiv ◽  
Anthropometric Data ◽  
Cross Sectional ◽  
History Of ◽  
Family History Of Hypertension ◽  
Living With Hiv

Introduction: The global prevalence of metabolic syndrome (MS) among people living with HIV/AIDS varies from 20% to 33%. Objective: to estimate the prevalence of metabolic syndrome and associated factors in a group of HIV-infected patients on antiretroviral therapy. Methods: This is a cross-sectional study with HIV-infected patients from a reference center in Bahia, Brazil. We evaluated clinical, socio-demographic and anthropometric data. MS was defined according to the guidelines of International Diabetes Federation. Results: We evaluated 152 patients with mean age of 47.3±11.6 years, 59.2% male. The main comorbidities detected were diabetes (3.3%) hypertriglyceridemia (9.3%) and metabolic syndrome (MS,38.2%). Patients with MS were predominantly women (55.2% vs 31.9%; p=0.005), older [52.1 (10.4) vs 44.3 (11.3); p<0.001], and had overweight (74.1% vs 23.4%; p<0.001). After multivariate analysis MS remained associated with age (OR = 1.076; 95% CI: 1.030 – 1.125), female sex (OR = 2.452; 95% CI: 1.114 – 5.374) and family history of hypertension (OR = 3.678; 95% CI: 1.431 – 9.395). Conclusion: Almost half of the HIV-infected patients in Bahia presents with MS which seems to be driven by classical risk factors.

Comparison of Non-radiographic Axial Spondyloarthritis and Ankylosing Spondyltis from a Single Rheumatology Hospital in Morocco

2020 ◽  
Vol 16 (3) ◽  
pp. 240-244 ◽  
Author(s):  
Nessrine Akasbi ◽  
Siar Nihad ◽  
Zoukal Sofia ◽  
El Kohen Khadija ◽  
Harzy Taoufik
Keyword(s):  
Disease Burden ◽  
Axial Spondyloarthritis ◽  
Univariate Analysis ◽  
Cross Sectional Study ◽  
Low Back ◽  
New Classification ◽  
Cross Sectional ◽  
Asas Criteria ◽  
History Of ◽  
High Level

Background: According to the new classification criteria developed by The Assessment of SpondyloArthritis International Society, patients with axial spondyloarthritis (axSpA) can be classified in 2 subgroups: Patients with radiographic axial spondyloarthritis: ankylosing spondylitis patients (AS) and those with non-radiographic axial spondyloarthritis (nr-axSpA). Objective: The aim of the present study is to describe and discuss the differences and similarities between the two subgroups. Patients and Methods: A cross-sectional study was conducted in a single rheumatology hospital in Morocco. These included patients diagnosed as having axial spondyloarthritis according to ASAS criteria 2010, during a period of 6 years. The AS and the nr-axSpA subgroups were compared for the various axSpA-related variables. Results: Of the 277 patients with a diagnosis of axial SpA who were included in this study, 160 had AS and 117 had nr-axSpA. AS and nr-ax-SpA shared a similar age at diagnosis, similar prevalence of low back pain, lumbar stiffness, extra-articular manifestations, BASDAI and BASFI. In the multivariate analysis, AS patients were mainly male with cervical stiffness, enthesitis, coxitis and high level of ESR (erythrocyte sedimentation rate). The females generally had a family history of SpA and arthritis and were associated to the nr-axSpA form in the univariate analysis. Conclusion: This was the first study to characterise patients with AS and nr-axSpA in Morocco. Consistent with other studies published, this study showed that patients with nr-axSpA and patients with AS shared a comparable degree of disease burden.

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