scholarly journals Constructing Compact Signatures for Individual Fingerprinting of Brain Connectomes

2021 ◽  
Vol 15 ◽  
Author(s):  
Vikram Ravindra ◽  
Petros Drineas ◽  
Ananth Grama
Keyword(s):  
State Of The Art ◽  
Statistical Tests ◽  
Functional Characterization ◽  
Sampling Technique ◽  
Computational Techniques ◽  
Test Accuracy ◽  
Computationally Efficient ◽  
Matrix Sampling ◽  
The Brain ◽  
And Task

Recent neuroimaging studies have shown that functional connectomes are unique to individuals, i.e., two distinct fMRIs taken over different sessions of the same subject are more similar in terms of their connectomes than those from two different subjects. In this study, we present new results that identify specific parts of resting state and task-specific connectomes that are responsible for the unique signatures. We show that a very small part of the connectome can be used to derive features for discriminating between individuals. A network of these features is shown to achieve excellent training and test accuracy in matching imaging datasets. We show that these features are statistically significant, robust to perturbations, invariant across populations, and are localized to a small number of structural regions of the brain. Furthermore, we show that for task-specific connectomes, the regions identified by our method are consistent with their known functional characterization. We present a new matrix sampling technique to derive computationally efficient and accurate methods for identifying the discriminating sub-connectome and support all of our claims using state-of-the-art statistical tests and computational techniques.

scholarly journals Evaluation of deep learning-based approaches for COVID-19 classification based on chest X-ray images

2021 ◽  
Author(s):  
Kamal KC ◽  
Zhendong Yin ◽  
Mingyang Wu ◽  
Zhilu Wu
Keyword(s):  
Neural Network ◽  
Bacterial Pneumonia ◽  
State Of The Art ◽  
Test Accuracy ◽  
Computationally Efficient ◽  
X Ray ◽  
The World ◽  
Data Problem ◽  
Chest X Ray ◽  
Novel Coronavirus

AbstractThe COVID-19, novel coronavirus or SARS-Cov-2, has claimed hundreds of thousands of lives and affected millions of people all around the world with the number of deaths and infections growing exponentially. Deep convolutional neural network (DCNN) has been a huge milestone for image classification task including medical images. Transfer learning of state-of-the-art models have proven to be an efficient method of overcoming deficient data problem. In this paper, a thorough evaluation of eight pre-trained models is presented. Training, validating, and testing of these models were performed on chest X-ray (CXR) images belonging to five distinct classes, containing a total of 760 images. Fine-tuned models, pre-trained in ImageNet dataset, were computationally efficient and accurate. Fine-tuned DenseNet121 achieved a test accuracy of 98.69% and macro f1-score of 0.99 for four classes classification containing healthy, bacterial pneumonia, COVID-19, and viral pneumonia, and fine-tuned models achieved higher test accuracy for three-class classification containing healthy, COVID-19, and SARS images. The experimental results show that only 62% of total parameters were retrained to achieve such accuracy.

HUBUNGAN DUKUNGAN KELUARGA TERHADAP TINGKAT KEMANDIRIAN ANAK RETARDASI MENTAL

2019 ◽  
Vol 11 (2) ◽  
pp. 87-92
Author(s):  
Dwi Indah Iswanti ◽  
Fery Agusman Motuho Mendrofa ◽  
Diyanto Diyanto
Keyword(s):  
Family Support ◽  
Quantitative Method ◽  
Statistical Tests ◽  
Sampling Technique ◽  
Mentally Retarded ◽  
P Value ◽  
Cross Sectional ◽  
Need Support ◽  
The Family ◽  
Mentally Retarded Children

Kemandirian bukanlah keterampilan yang muncul secara tiba-tiba tetapi perlu diajarkan dan dilatih pada anak agar tidak menghambat tugas- tugas perkembangan anak selanjutnya. Terutama pada anak yang mengalami retardasi mental akan sangat membutuhkan dukungan dari keluarga. Tujuan penelitian untuk mengetahui hubungan  dukungan keluarga dengan tingkat kemandirian anak retardasi mental di SLB Negeri Semarang. Penelitian ini menggunakan metode kuantitatif dengan pendekatan cross sectional. Populasi dalam penelitian ini adalah seluruh orang tua siswa kelas IV-VI di SLB Negeri Semarang yang berjumlah 64 siswa. Teknik sampling yang digunakan adalah total sampling. Dukungan keluarga pada anak retardasi mental sebagian besar adalah mendukung yaitu sebanyak 53,1%, kemandirian anak retardasi mental sebagian besar adalah kurang mandiri yaitu sebanyak 53,1%. Hasil uji statistik menemukan ada hubungan antara dukungan keluarga dengan kemandirian anak retardasi mental di SLB Negeri Semarang, dengan p value sebesar 0,000.   Kata kunci : dukungan keluarga, kemandirian anak retardasi mental THE CORRELATION BETWEEN FAMILY SUPPORT AND THE LEVEL OF INDEPENDENCE OF MENTALLY RETARDED CHILDREN   ABSTRACT Independence is not a skill that emerges suddenly but needs to be taught and trained in children so as not to inhibit the tasks of further child development. Especially for children who are mentally retarded, they will need support from the family. Research objectives to find out the correlation between family support and the level of independence of mentally retarded children in extraordinary school State of Semarang. This study uses a quantitative method with a cross sectional approach. The population in this study were all parents of students in class IV-VI in Semarang State SLB, amounting to 64 students. The sampling technique used is total sampling. Family support for mentally retarded children was mostly supportive, as much as 53.1%, the independence of most mentally retarded children was less independent, which was as much as 53.1%. The results of statistical tests found that there was a correlation between family support and the independence of mentally retarded children in Semarang State SLB, with a p value of 0,000.   Keywords: family support, independence of mentally retarded children

Challenges in perspective of life skills acquisition; implication for placement of life skills in university curriculum

2020 ◽  
Vol 24 (4) ◽  
pp. 189-194
Author(s):  
Wasim Khan ◽  
Salahuddin Khan ◽  
Tasleem Arif ◽  
Sohail R. Khan
Keyword(s):  
Life Skills ◽  
Student Athletes ◽  
Statistical Tests ◽  
Sampling Technique ◽  
Simple Random Sampling ◽  
Target Population ◽  
Skills Acquisition ◽  
Significance Level ◽  
Khyber Pakhtunkhwa ◽  
Educational Curriculum

Background and Study Aim: The main purpose behind the study was to establish the challenges in relation to the acquisition of life skills among university student-athletes of Khyber Pakhtunkhwa. The study assessed the extent to which the concern existing resources, facilitators, and trainer attitude influences life skills acquisition among student-athletes. Material and Methods: Descriptive survey research design was followed to obtain desirable results. The target population of this study consisted of all those who participated in different sport at the university level of Khyber Pakhtunkhwa (KP), Pakistan. Amongst them, we selected a representative sample (n=389 fifty 50% of the total population) with the help of a simple random sampling technique. The Statistical Package for Social Sciences (SPSS) version, 24 was used to code and analyse the data. The hypotheses were tested by applying statistical tests like Step-wise regression and independents sample t-test. The significance level of 0.05 was fixed to accept or reject the set hypotheses. Results: Findings of the study indicated that existing resources, facilitators, and trainer/coach attitude significantly influences life skills acquisition among student-athletes (.001, .001 & .000 < .05). The analysed data revealed no significantly difference regarding extent to which specific challenges such as existing resources, facilitators, and trainer attitude influences the acquisition of life skills (.500, .133 & .149 > .05). Conclusions: The findings of the study revealed that all participants have agreed upon the importance of life skills. Therefore, the life skills course might be considered as an integral part of every educational curriculum of Pakistan. It is suggested that a minimum of 2 hours per week may be included in the educational curriculum of each discipline.

The Effect of Investments and Risk Based Capital (RBC) of Tabarru Funds on Company (Case Study of Sharia Insurance in Indonesia for 2014-2019)

2020 ◽  
Vol 8 (1) ◽  
pp. 87-97
Author(s):  
Nana Diana ◽  
Tati Apriani
Keyword(s):  
Life Insurance ◽  
Statistical Tests ◽  
Linear Regression Analysis ◽  
Sampling Technique ◽  
Multiple Linear Regression Analysis ◽  
Insurance Companies ◽  
Coefficient Of Determination ◽  
Verification Method ◽  
Investment Returns ◽  
The Government

This study aims to examine the influence of investment returns and Risk Based Capital (RBC) Tabarru Funds to the profit of sharia life insurance in Indonesia from 2014-2019. This study The type of this research is quantitative research with descriptive verification as a method. This research method uses descriptive verification method with quantitative approach. The data used in this study were sourced from the financial statements of Islamic life insurance companies in Indonesia for the 2014-2019 period. Then the data obtained were analyzed using multiple linear regression analysis and hypothesis testing consisting of t test and f test with the help of SPSS 21 software. The sampling technique uses non probability sampling with purposive sampling technique. Based on the results of the study it can be seen that the development of investment returns on Sharia Life Insurance in Indonesia has fluctuated and even suffered losses. While the development of Risk Based Capital (RBC) has increased and decreased but overall above 120% as determined by the government. Likewise, the profits earned in each year fluctuate. The results of statistical tests show that investment results partially have a positive effect on profit and Risk Based Capital (RBC) of Tabarru funds partially has a negative effect on profit. Simultaneously investment return and Risk Based Capital (RBC) affect on profit. In addition, the results of the coefficient of determination (R2) were obtained which obtained a value of 81%. This shows that the variable investment returns and Risk Based Capital (RBC) can affect earnings by 81% and the remaining 19% is influenced by other variables not used in this study.

PENGARUH PIJAT BAYI TERHADAP KUALITAS TIDUR BAYI UMUR 0 – 3 BULAN DI WILAYAH KERJA PUSKESMAS SOSIAL PALEMBANG TAHUN 2016

2019 ◽  
Vol 6 (2) ◽  
Author(s):  
Juliana Widyastuti Wahyuningsih Juliana Widyastuti Wahyuningsih
Keyword(s):  
Experimental Design ◽  
Growth And Development ◽  
Sampling Technique ◽  
P Value ◽  
Development Phase ◽  
Quality Of Sleep ◽  
Infant Massage ◽  
Before And After ◽  
The Brain

ABSTRAK Tidur merupakan kebutuhan yang harus terpenuhi terutama pada fase perkembangan karena selama tidur akan terjadi perkembangan otak maupun tubuh, sehingga gangguan tidur merupakan masalah yang akan menimbulkan dampak buruk terhadap pertumbuhan dan perkembangan bayi. Kualitas tidur bayi yang baik dapat diciptakan dengan memberikan pemijatan bayi secara rutin. Penelitian ini bertujuan untuk membuktikan bahwa pemijatan dapat mempengaruhi kualitas tidur bayi umur 0-3 bulan. Penelitian ini menggunakan desain penelitian Quasy Eksperimental dengan metode One Group Pretest-Postest. Sampel 22 bayi yang dipilih dengan tehnik Total Sampling yang di observasi sebelum dan sesudah diberikan pemijatan. Variabel yang diukur dalam penelitian ini adalah kualitas tidur bayi 0-3 bulan. Hasil penelitian menunjukkan bahwa ada pengaruh pijat bayi terhadap kualitas tidur bayi umur 0-3 bulan (p value  0,008 < α = 0,05).Berdasarkan hasil penelitian ini disarankan agar keluarga dan masyarakat memberikan pemijatan secara rutin dan mandiri untuk meningkatkan kebutuhan tidur bayi yang berkualitas.   ABSTRACT Sleep is a human necessity that must be met, especially in the development phase because during sleep will occur the brain and body developments, so that sleep disturbance is a problem that would cause adverse effects on infants’ growth and development. The good quality of sleep can be created by providing the infants massage routinely. This study aimed to prove that the massage could affect the quality of sleep on the 0-3 months old baby. This study used Quasy-experimental design with One Group Pretest-Posttest. The sample 22 infants selected by total sampling technique observed on before and after the massage. The variables measured in this study are the quality of sleep. The results of study indicate that there is an effect of infant massage to the sleep quality on 0-3 months old babies (p value 0,008 < α = 0,05).Based on the results of this study it recommended for the families and communities to provide infant massage regularly and independently to increase the quality of sleep on the baby.  

scholarly journals Vision and the representation of the surroundings in spatial memory

2011 ◽  
Vol 366 (1564) ◽  
pp. 596-610 ◽  
Author(s):  
Benjamin W. Tatler ◽  
Michael F. Land
Keyword(s):  
Spatial Memory ◽  
Visual Environment ◽  
Coding Scheme ◽  
Perceptual Stability ◽  
The World ◽  
Scene Viewing ◽  
Memory Representations ◽  
The Brain ◽  
Allocentric Representations ◽  
And Task

One of the paradoxes of vision is that the world as it appears to us and the image on the retina at any moment are not much like each other. The visual world seems to be extensive and continuous across time. However, the manner in which we sample the visual environment is neither extensive nor continuous. How does the brain reconcile these differences? Here, we consider existing evidence from both static and dynamic viewing paradigms together with the logical requirements of any representational scheme that would be able to support active behaviour. While static scene viewing paradigms favour extensive, but perhaps abstracted, memory representations, dynamic settings suggest sparser and task-selective representation. We suggest that in dynamic settings where movement within extended environments is required to complete a task, the combination of visual input, egocentric and allocentric representations work together to allow efficient behaviour. The egocentric model serves as a coding scheme in which actions can be planned, but also offers a potential means of providing the perceptual stability that we experience.

Bistability of somatic pattern memories: stochastic outcomes in bioelectric circuits underlying regeneration

2021 ◽  
Vol 376 (1821) ◽  
pp. 20190765 ◽  
Author(s):  
Giovanni Pezzulo ◽  
Joshua LaPalme ◽  
Fallon Durant ◽  
Michael Levin
Keyword(s):  
Large Scale ◽  
Computational Models ◽  
State Of The Art ◽  
Memory Representation ◽  
Theme Issue ◽  
Evolutionary Innovation ◽  
New Interpretation ◽  
The Brain

Nervous systems’ computational abilities are an evolutionary innovation, specializing and speed-optimizing ancient biophysical dynamics. Bioelectric signalling originated in cells' communication with the outside world and with each other, enabling cooperation towards adaptive construction and repair of multicellular bodies. Here, we review the emerging field of developmental bioelectricity, which links the field of basal cognition to state-of-the-art questions in regenerative medicine, synthetic bioengineering and even artificial intelligence. One of the predictions of this view is that regeneration and regulative development can restore correct large-scale anatomies from diverse starting states because, like the brain, they exploit bioelectric encoding of distributed goal states—in this case, pattern memories. We propose a new interpretation of recent stochastic regenerative phenotypes in planaria, by appealing to computational models of memory representation and processing in the brain. Moreover, we discuss novel findings showing that bioelectric changes induced in planaria can be stored in tissue for over a week, thus revealing that somatic bioelectric circuits in vivo can implement a long-term, re-writable memory medium. A consideration of the mechanisms, evolution and functionality of basal cognition makes novel predictions and provides an integrative perspective on the evolution, physiology and biomedicine of information processing in vivo . This article is part of the theme issue ‘Basal cognition: multicellularity, neurons and the cognitive lens’.

Direct Sensitivity Analysis of Multibody Systems: A Vehicle Dynamics Benchmark

2019 ◽  
Vol 14 (2) ◽  
Author(s):  
Alfonso Callejo ◽  
Daniel Dopico
Keyword(s):  
Sensitivity Analysis ◽  
Multibody Systems ◽  
Automatic Differentiation ◽  
Time Integration ◽  
General Purpose ◽  
Contact Forces ◽  
Design Parameters ◽  
Computational Techniques ◽  
Computationally Efficient ◽  
Integration Algorithm

Algorithms for the sensitivity analysis of multibody systems are quickly maturing as computational and software resources grow. Indeed, the area has made substantial progress since the first academic methods and examples were developed. Today, sensitivity analysis tools aimed at gradient-based design optimization are required to be as computationally efficient and scalable as possible. This paper presents extensive verification of one of the most popular sensitivity analysis techniques, namely the direct differentiation method (DDM). Usage of such method is recommended when the number of design parameters relative to the number of outputs is small and when the time integration algorithm is sensitive to accumulation errors. Verification is hereby accomplished through two radically different computational techniques, namely manual differentiation and automatic differentiation, which are used to compute the necessary partial derivatives. Experiments are conducted on an 18-degree-of-freedom, 366-dependent-coordinate bus model with realistic geometry and tire contact forces, which constitutes an unusually large system within general-purpose sensitivity analysis of multibody systems. The results are in good agreement; the manual technique provides shorter runtimes, whereas the automatic differentiation technique is easier to implement. The presented results highlight the potential of manual and automatic differentiation approaches within general-purpose simulation packages, and the importance of formulation benchmarking.

scholarly journals Multifaceted origins of sex differences in the brain

2016 ◽  
Vol 371 (1688) ◽  
pp. 20150106 ◽  
Author(s):  
Margaret M. McCarthy
Keyword(s):  
Sex Differences ◽  
State Of The Art ◽  
Human Subjects ◽  
Special Issue ◽  
Molecular Analyses ◽  
The Past ◽  
Current State ◽  
Biological Variable ◽  
Males And Females ◽  
The Brain

Studies of sex differences in the brain range from reductionistic cell and molecular analyses in animal models to functional imaging in awake human subjects, with many other levels in between. Interpretations and conclusions about the importance of particular differences often vary with differing levels of analyses and can lead to discord and dissent. In the past two decades, the range of neurobiological, psychological and psychiatric endpoints found to differ between males and females has expanded beyond reproduction into every aspect of the healthy and diseased brain, and thereby demands our attention. A greater understanding of all aspects of neural functioning will only be achieved by incorporating sex as a biological variable. The goal of this review is to highlight the current state of the art of the discipline of sex differences research with an emphasis on the brain and to contextualize the articles appearing in the accompanying special issue.

scholarly journals Employee’s Performance in a Commission for General Election of Banten Province, an Evidence from Indonesia

2019 ◽  
Vol 9 (3) ◽  
pp. 176
Author(s):  
Syaeful Bahri ◽  
Ma’ruf Akbar ◽  
Billy Tunas ◽  
Sukemi Kadiman
Keyword(s):  
Quantitative Research ◽  
Employee Performance ◽  
Sampling Technique ◽  
General Election ◽  
Primary Data ◽  
Team Cohesiveness ◽  
Election Commission ◽  
Performance Research ◽  
And Task ◽  
Task Commitment

The importance of employee performance research in a Commission for General Election of Banten Province-Indonesia as the main problem in this research based on empirical data that we obtained from the General Election Commission in Banten Provincial Office, data shows that employee performance is not optimal yet. The state of the art of this research can be stated that this study supports the results of other studies conducted previously on the Effect of Leadership Integrity, Team Cohesiveness and Task Commitment on Employee Performance. The purpose of this study is to examine the Effect of Leadership Integrity, Team Cohesiveness and Task Commitment on Employee Performance of the General Election Commission in Banten Province. Quantitative research has been applied to this study, the respondents were employees of the Banten Provincial Election Commission. The random sampling technique was selected. The primary data, questionnaires, and tests were analyzed by path analysis. The research found that there is the Influence of Leadership Integrity, Team Cohesiveness and Task Commitment on the Employee Performance of the General Election Commission in Banten Province, Indonesia. Some recommendations are given a consideration factor in other similar organizations.

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