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Transsexualism: A Different Viewpoint to Brain Changes
Mohammad Reza Mohammadi,Ali Khaleghi 대한정신약물학회 2018 CLINICAL PSYCHOPHARMACOLOGY AND NEUROSCIENCE Vol.16 No.2
Transsexualism refers to a condition or belief which results in gender dysphoria in individuals and makes them insist that their biological gender is different from their psychological and experienced gender. Although the etiology of gender dysphoria (or transsexualism) is still unknown, different neuroimaging studies show that structural and functional changes of the brain result from this sexual incongruence. The question here is whether these reported changes form part of the etiology of transsexualism or themselves result from transsexualism culture, behaviors and lifestyle. Responding to this question can be more precise by consideration of cultural neuroscience concepts, particularly the culture–behavior– brain (CBB) loop model and the interactions between behavior, culture and brain. In this article, we first review the studies on the brain of transgender people and then we will discuss the validity of this claim based on the CBB loop model. In summary, transgender individuals experience change in lifestyle, context of beliefs and concepts and, as a result, their culture and behaviors. Given the close relationship and interaction between culture, behavior and brain, the individual’s brain adapts itself to the new condition (culture) and concepts and starts to alter its function and structure.
EEG Classification of ADHD and Normal Children Using Non-linear Features and Neural Network
Mohammad Reza Mohammadi,Ali Khaleghi,Ali Moti Nasrabadi,Safa Rafieivand,Moslem Begol,Hadi Zarafshan 대한의용생체공학회 2016 Biomedical Engineering Letters (BMEL) Vol.6 No.2
Purpose Attention-Deficit Hyperactivity Disorder (ADHD)is a neuro-developmental disorder that is characterized byhyperactivity, inattention and abrupt behaviors. This studyproposes an approach for distinguishing ADHD childrenfrom normal children using their EEG signals when performinga cognitive task. Methods In this study, 30 children with ADHD and 30 agematchedhealthy children without neurological disordersunderwent electroencephalography (EEG) when performinga task to stimulate their attention. Fractal dimension (FD),approximate entropy and lyapunov exponent were extractedfrom EEG signals as non-linear features. In order to improvethe classification results, double input symmetrical relevance(DISR) and minimum Redundancy Maximum Relevance(mRMR) methods were used to select the best features asinputs to multi-layer perceptron (MLP) neural network. Results As expected, children with ADHD had more delaysand were less accurate in doing the cognitive task. Also, theextracted non-linear features revealed that non-linear indiceswere greater in different regions of the brain of ADHDchildren compared to healthy children. This could indicate amore chaotic behavior of ADHD children while performinga cognitive task. Finally, the accuracy of 92.28% and 93.65%were achieved using mRMR method and DISR methodusing MLP, respectively. Conclusions The results of this study demonstrate the abilityof the non-linear features to distinguish ADHD children fromhealthy children.
Seismic mitigation of substation cable connected equipment using friction pendulum systems
Reza Karami Mohammadi,Masoud Mirtaheri,Mojtaba Salkhordeh,Erfan Mosaffa,Golsa Mahdavi,Mohammad Amin Hariri-Ardebili 국제구조공학회 2019 Structural Engineering and Mechanics, An Int'l Jou Vol.72 No.6
Power transmission substations are susceptible to potential damage under seismic excitations. Two of the major seismic failure modes in substation supplies are: the breakage of brittle insulator, and conductor end fittings. This paper presents efficient isolation strategies for seismically strengthening of a two-item set of equipment including capacitive voltage transformer (CVT) adjacent to a Lightning Arrester (LA). Two different strategies are proposed, Case A: implementation of base isolation at the base of the CVT, while the LA is kept fixed-base, and Case B: implementation of base isolation at the base of the LA, while the CVT is kept fixed-base. Both CVT and LA are connected to each other using a cable during the dynamic excitation. The probabilistic seismic behavior is measured by Incremental Dynamic Analysis (IDA), and a series of appropriate damage states are proposed. Finally, the fragility curves are derived for both the systems. It is found that Friction Pendulum System (FPS) isolator has the potential of decreasing flexural stresses caused by intense ground motions. The research has shown that when the FPS is placed under LA, i.e. Case B (as oppose to Case A), the efficiency of the system is improved in terms of reducing the forces and stresses at the bottom of the porcelain. Several parametric studies are also performed to determine the optimum physical properties of the FPS.
Structural modeling of petroleum fractions based on mixture viscosity and Watson K factor
Mohammad Reza Omidkhah,Abbas Mohammadi,Ramin Karimzadeh,Ali Haghtalab 한국화학공학회 2013 Korean Journal of Chemical Engineering Vol.30 No.2
Two procedures have been developed for structural modeling of petroleum fractions based on mixture viscosity and Watson K factor. The representative molecules of paraffinic, naphthenic and aromatic hydrocarbons, based upon Ruzicka’s structural model, have been determined for lube-oil cut SAE 10 from Tehran oil refinery. Unlike previous methods, the newly developed procedures do not require time-consuming and costly laboratory data such as true boiling point profile. Good agreement between predictions of the new models and experimental results has been observed. Moreover, the proposed methods take less run-time than previous models due to less experimental and computational complexities. The results indicate that Ruzicka’s procedure, based on vapor pressure, is only applicable for light hydrocarbon mixtures, while the new methods can be applied for structural modeling of a wide range of petroleum fractions. Furthermore, as a result of this study, the application of a vapor pressure constraint leads to a higher degree of accuracy than the earlier suggested constraint, partial pressure, by Ruzicka.
Reza Mohammadi,Mojtaba Yousefi,Zahra Sarlak,Nagendra Prasad Shah,Amir Mohammad Mortazavian,Ehsan Sadeghi,Maryam Zabihzadeh Khajavi 한국식품과학회 2017 Food Science and Biotechnology Vol.26 No.3
In this study, the effects of various ratios of cow milk to soy milk (100:0, 75:25, 50:50, 25:75, and 0:100) and three types of commercial culture composition (ABY- 1, MY-720, and YO-Mix 210; all of them containing Lactobacillus acidophilus, Bifidobacterium lactis, and yogurt cultures) on the biochemical, microbiological, and sensory characteristics of a probiotic fermented composite drink during incubation and refrigerated storage were investigated. It was found that the shortest fermentation time, greatest mean pH drop rate, and mean acidity increase rate were related to the 50:50/ABY treatment. 25:75/ABY and 25:75/MY treatments exhibited the highest viability of B. bifidum and/or L. acidophilus at the end of 21 days of refrigerated storage. The influence of the type of starter culture composition on the sensory properties of the final products was not significant. Based on microbial and sensory evaluations, using the 50:50 ratio with each type of culture composition was considered as the most suitable treatment.
Mohammadi, Shooka,Sulaiman, Suhaina,Koon, Poh Bee,Amani, Reza,Hosseini, Seyed Mohammad Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.1
Following breast cancer diagnosis, women often attempt to modify their lifestyles to improve their health and prevent recurrence. These behavioral changes typically involve diet and physical activity modification. The aim of this study was to determine association between healthy eating habits and physical activity with quality of life among Iranian breast cancer survivors. A total of 100 Iranian women, aged between 32 to 61 years were recruited to participate in this cross-sectional study. Eating practices were evaluated by a validated questionnaire modified from the Women's Healthy Eating and Living (WHEL) study. Physical activity was assessed using the International Physical Activity Questionnaire (IPAQ). A standardized questionnaire by the European Organization of Research and Treatment of Cancer Quality of Life and its breast cancer module (EORTC QLQ-C30/+BR-23) were applied to determine quality of life. Approximately 29% of the cancer survivors were categorized as having healthy eating practices, 34% had moderate eating practices and 37% had poor eating practices based on nutrition guidelines. The study found positive changes in the decreased intake of fast foods (90%), red meat (70%) and increased intake of fruits (85%) and vegetables (78%). Generally, breast cancer survivors with healthy eating practices had better global quality of life, social, emotional, cognitive and role functions. Results showed that only 12 women (12%) met the criteria for regular vigorous exercise, 22% had regular moderate-intensity exercise while the majority (65%) had low-intensity physical activity. Breast cancer survivors with higher level of physical activity had better emotional and cognitive functions. Healthy eating practices and physical activity can improve quality of life of cancer survivors. Health care professionals should promote good dietary habits and physical activity to improve survivor's health and quality of life.
Association of Nutritional Status with Quality of Life in Breast Cancer Survivors
Mohammadi, Shooka,Sulaiman, Suhaina,Koon, Poh Bee,Amani, Reza,Hosseini, Seyed Mohammad Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.12
Nutritional status and dietary intake play a significant role in the prognosis of breast cancer and may modify the progression of disease. The aim of this study was to determine the influence of nutritional status on the quality of life of Iranian breast cancer survivors. Cross-sectional data were collected for 100 Iranian breast cancer survivors, aged 32 to 61 years, attending the oncology outpatient clinic at Golestan Hospital, Ahvaz, Iran. Nutritional status of subjects was assessed by anthropometric measurements, Patient-Generated Subjective Global Assessment (PG-SGA) and three non-consecutive 24-hour diet recalls. The European Organization of Research and Treatment of Cancer Quality of Life form (EORTC QLQ-C30) was used to assess quality of life. Ninety-four percent of the survivors were well-nourished, 6% were moderately malnourished or suspected of being malnourished while none were severely malnourished. Prevalence of overweight and obesity was 86%. Overall, participants had an inadequate intake of vitamin D, E, iron and magnesium according to dietary reference intake (DRI) recommendations. Survivors with better nutritional status had better functioning scales and experienced fewer clinical symptoms. It appears important to provide educational and nutritional screening programs to improve cancer survivor quality of life.
Development of gluten-free flat bread using hydrocolloids: Xanthan and CMC
Mehrdad Mohammadi,Tirang-Reza Neyestani,Nasim Sadeghnia,Mohammad-Hossain Azizi,Amir Mohammad Mortazavian 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4
The effects of xanthan gum (XG) and (carboxymethyl cellulose (CMC) (5–20 g kg-1) on the quality parameters of gluten-free flat bread, based on rice flour were investigated. Increase in CMC concentration yielded bigger gas cells, leading to better crumb porosity. Formula 3 (F3), containing 15 g kg-1 XG and formula 10 (F10), containing 10 g kg-1 CMC and 10 g kg-1 XG resulted in the highest dough yield (P < 0.05) and bread yield, respectively, and F10 showed the lowest bread weight loss (P < 0.05). F10, followed by, F3 were the best and most acceptable (P < 0.05) formulae, compared to all the others.