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Numerical Solution of Model of Cancer Invasion with Tissue  [PDF]
Farhad Hatami, Mohammad Bagher Ghaemi
Applied Mathematics (AM) , 2013, DOI: 10.4236/am.2013.47143
Abstract:

Chemotaxis-haptotaxis model of cancer invasion with tissue remodeling is one of the important PDEs systems in medicine, mathematics and biomathematics. In this paper we find the solution of chemotaxis-haptotaxis model of cancer invasion using the new homotopy perturbation method (NHPM). Then by comparing some estimated numerical result with simulation laboratory result, it shows that NHPM is an efficient and exact way for solving cancer PDEs system.

New Spa Types among MRSA and MSSA Isolates in North of Iran  [PDF]
Fatemeh Shakeri, Ezzat Allah Ghaemi
Advances in Microbiology (AiM) , 2014, DOI: 10.4236/aim.2014.413100
Abstract: Staphylococcus aureus typing using gene encoding protein A (spa typing) seems to have a high potential discriminatory power for typing this bacterium. This study was designed based on spa typing method to compare the S. aureus types among healthy carrier vs patients, and MRSA vs MSSA isolates. Method: This study was carried out on 182 spa typeable S. aureus isolates, including 52 MRSA. DNA was extracted by phenol chloroform-isoamyl alcohol method and it was amplified by specific primer of polymorphic X region of spa. Spa types were determined by Ridom Staph Type software. The spa types distribution among MRSA vs MSSA and healthy carrier vs patients, isolates were statistically compared by X2 method and P < 0.05 was considered as significant. Result: The most common types of spa in our region were t037 (18.3%) and t937 (13.9%) from 50 spa types which were identified in this study. spa types in this study were isolated from various age groups but t660 spa types were only isolated from children. Distribution of all spa types among MRSA and MSSA isolates was 16 and 38 types, respectively which is significant. In this study we found seven new spa types (belong to twelve isolates) which are reported for the first time. In 5 out of the above 7 new types the 24 bp repeated sequences in spa gene X region were already recognized but their 24 bp arrangement is introduced in our present investigation. In the remaining 2 new types we found new 24 bp nucleotide sequences which are also introduced for the first time in our present study. Conclusion: The distribution of spa types in MSSA strains was significantly higher than MRSA isolates, but there are not any specific spa types for discrimination between MRSA and MSSA. The novelty of our study is the introducing 7 new spa types including 2 new 24 bp repeated sequences in the X region of spa gene.
THE UTILIZATION OF WEB-BASED TECHNOLOGY AS PREDICTOR OF FACULTY INSIGHTS OF SUPPORT FOR THE IMPLEMENTATION OF ELEARNING
Hamed GHAEMI
The Turkish Online Journal of Distance Education , 2011,
Abstract: For the last three decades higher education institutions have been forced to undergo thorough transformation and revitalization. Parallel to society, a factor that has played a crucial role in transforming higher education is the advance of information technology (IT). The potential for use of IT in education has been increasingly recognized and higher education faculties have begun to use this technology in different ways in their teaching. Instructors today regularly include electronic technologies that extend instructional resources to their students: threaded discussion boards, websites, chat rooms, email, newsgroups, etc. Moreover, because the use of mobile technologies that join with web-based resources is becoming a more common practice, the lines differentiating web-based and face-to-face classroom teaching are becoming less distinguishable.
The Exploration of Multilingualism: Development of research on L3, multilingualism and multiple language acquisition (book review)
Hamed Ghaemi
Nonpartisan Education Review , 2011,
Abstract: no abstract
Global Existence of Classical Solutions to a Cancer Invasion Model  [PDF]
Khadijeh Baghaei, Mohammad Bagher Ghaemi, Mahmoud Hesaaraki
Applied Mathematics (AM) , 2012, DOI: 10.4236/am.2012.34059
Abstract: This paper deals with a chemotaxis-haptotaxis model of cancer invasion of tissue. The model consists of three reaction- diffusion- taxis partial differential equations describing interactions between cancer cells, matrix degrading enzymes, and the host tissue. The equation for cell density includes two bounded nonlinear density-dependent chemotactic and haptotactic sensitivity functions. In the absence of logistic damping, we prove the global existence of a unique classical solution to this model by some delicate a priori estimate techniques
The Newest Mania: Seeing Disease Mongering Everywhere
S. Nassir Ghaemi
PLOS Medicine , 2006, DOI: 10.1371/journal.pmed.0030319
Abstract:
Nosologomania: DSM & Karl Jaspers' Critique of Kraepelin
S Nassir Ghaemi
Philosophy, Ethics, and Humanities in Medicine , 2009, DOI: 10.1186/1747-5341-4-10
Abstract: When Emil Kraepelin laid out his vision of psychiatric nosology at the turn of the twentieth century, he was met with plaudits but also opposition. The voices of opposition would gain ground after Kraepelin's death until the late twentieth century, when his views were reborn in the American neo-Kraepelinian school of psychiatry, influential in the revolutionary revision of the American nosological system, DSM-III, in 1980. Another contemporary critique of Kraepelin's nosology, by Karl Jaspers, has been underappreciated, however. In this paper, I review the evolution of Kraepelin's nosology in the United States, and examine Jaspers' critique of Kraepelin's work, especially the ideal type method, so as to improve our current neo-Kraepelinian nosology.After Kraepelin's initial popularity, his system was largely eclipsed, especially in the US, by the rise of the psychoanalytic movement [1], where (in the 1940s–1970s) there was a reversion to the nineteenth century insanity model, relabeled the neurosis-psychosis continuum [2]: everyone, patients or not, sick or healthy, fell on that continuum somewhere; the disease tradition in medicine was not considered central to psychiatry [1].A turning point that led to the rebirth of Kraepelin's nosology began in the 1950s, when lithium was introduced for mania, chlorpromazine for schizophrenia, and imipramine for depression [3]. These medications were increasingly used and validated in clinical trials, and by the 1970s, a practical problem led to reassessment of the Freudian consensus on the neurosis-psychosis model [4]. If lithium worked specifically for mania, tricyclic antidepressants for depression, and phenothiazines for schizophrenia, then it would seem that Kraepelin's nosology was no longer therapeutically irrelevant. Despite later experience that these agents are relatively nonspecific [3], their apparent specificity in the 1950s–1970s led to enthusiasm for linking them to Kraepelin's nosology. The birth of psychopharmac
Evaluation of Lipids Level and Its Relation to Hba1c in Diabetic Children
N Ghaemi,R Vakili
Iranian Journal of Pediatrics , 2005,
Abstract: Background: Type 1 diabetes is the most common endocrine disorder of childhood. This disease is followed by a variety of bio-psycho-social consequences of which cardiovascular diseases are considered to be the most significant cause of mortality among them. This is due to atherosclerosis, and dyslipidemia plays an important role as a risk factor. The aim of the present study was to evaluate the need for early screening of patients for dyslipidemia. Methods: In a descriptive and cross-sectional study we assessed a sample of 51 randomly selected patients, with a mean age of 13.47+(2.6) years, ranged from 5 to 19 years, referred to Khorasan Center of Diabetes Research. We determined lipoproteins with biochemical methods and Hemoglobin A1C (HbA1C) with chromatography as well. Finally, the data was analyzed by SPSS. Results: The mean levels ± ISD of triglycerides (TG), total cholesterol (TC), low density lipoproteins (LDL), high density lipoproteins (HDL), and HbA1C were 97±55.4, 180.8 ±44.1, 113.3±32.6, 48.4±10 mg /dl and 8.1%±1.8 respectively. In poorly controlled patients (HbA1C>9), the mean level of TG, TC, LDL, HDL was 123.6±5.80, 199.40+61.78, 129.20±44.66 and 50.93+9.61, and in the second group (HbA1C≤9) was 85.94±40.64, 173.03±32.66, 106.64±23.71 and 47.28±11.23 mg/dl respectively. Conclusion: Mean lipid value of our patients in comparison with those assumed as treatment goals confirmed that only TC and LDL were higher. Poorly controlled group compared with the rest of patients had significantly higher TG, TC and LDL levels, in the case of HDL, the difference was not significant.
Comparison of success rate of three methods of nasogastric intubation
Mehdi Ghaemi,Hossein Bagheri
Koomesh , 2011,
Abstract: Introduction: Insertion of a nasogastric tube (NGT) sometimes will be difficult in patients who are anesthetized or comatose. The tube entraps in the pyriform sinuses and, thus, coils inside the oral cavity. Several methods have been offered to increase the success rate of the procedure. The aim of this study was to compare the success rate of three methods of NGT insertion. Materials and Methods: In a prospective clinical trial study, 162 patients who needed NGT insertion were randomly divided into three groups: Contorl, D and M groups. In the control group, insertion of the tube was done with the head of the patient in the normal position. In D and M groups, NGT were conducted through the pharynx towards the esophagus by digital assistance and by Magills forceps, respectively. Results: the success rates in the control, D and M groups were 70%, 94% and 81%, respectively. The differences between D group and the control and M groups were significant. Conclusion: NGT insertion by digital assistance is recommended as first choice fornasogastric intubation in anesthetized and comatose patients due to facility and low cost.
A Case Study of a Foreign Language Learner with Severe Learning Problem: The Role of Anxiety
Farid Ghaemi,Naeemeh Kharaghani
Theory and Practice in Language Studies , 2011, DOI: 10.4304/tpls.1.11.1659-1663
Abstract: This study is a case study of a foreign language learner with severe learning problem. After selecting the subject, he was interviewed by the researcher for some sessions. The researcher discussed the items of some valid questionnaires about anxiety. Some parts of the so called interview were taped with the learner's collaboration and consciousness. Then the results were analyzed by classifying the items of the questionnaire and taking into account the cross check items. It was found that the participant was suffering from anxiety in English language classrooms.
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