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  • Open Access

    ARTICLE

    Spectrum Allocation for Cognitive Radio Networks Using the Fireworks Algorithm

    Zhou Feng, Xue Weilian*

    Computer Systems Science and Engineering, Vol.33, No.4, pp. 275-286, 2018, DOI:10.32604/csse.2018.33.275

    Abstract The fireworks algorithm features a small number of parameters, remarkable optimization ability, and resistance to a local optimum. Based on the graph coloring model, the fireworks algorithm is introduced for the first time to solve the spectrum allocation problem for cognitive radio networks, thus maximizing utility and fairness of spectrum allocation. Two-layer binary coding is adopted for individual fireworks. The first layer refers to the coding of cognitive users used to determine channels that can be connected with the user. The second layer refers to the auxiliary coding of channels responsible for addressing mutual interference among multiple cognitive users when… More >

  • Open Access

    ARTICLE

    An Efficient Optimized Handover in Cognitive Radio Networks Using Cooperative Spectrum Sensing

    H. Anandakumara, K. Umamaheswarib

    Intelligent Automation & Soft Computing, Vol.24, No.4, pp. 843-849, 2018, DOI:10.1080/10798587.2017.1364931

    Abstract Cognitive radio systems necessitate the incorporation of cooperative spectrum sensing among cognitive users to increase the reliability of detection. We have found that cooperative spectrum sensing is not only advantageous, but is also essential to avoid interference with any primary users. Interference by licensed users becomes a chief concern and issue, which affects primary as well as secondary users leading to restrictions in spectrum sensing in cognitive radios. When the number of cognitive users increases, the overheads of the systems, which are meant to report the sensing results to the common receiver, which becomes massive. When the spectrum, which is… More >

  • Open Access

    ARTICLE

    System Integration for Cognitive Model of a Robot Partner

    Jinseok Woo, János Botzheim, Naoyuki Kubota

    Intelligent Automation & Soft Computing, Vol.24, No.4, pp. 829-841, 2018, DOI:10.1080/10798587.2017.1364919

    Abstract This paper introduces the integrated system of a smart-device-based cognitive robot partner called iPhonoid-C. Interaction with a robot partner requires many elements, including verbal communication, nonverbal communication, and embodiment as well. A robot partner should be able to understand human sentences, as well as nonverbal information such as human gestures. In the proposed system, the robot has an emotional model connecting the input information from the human with the robot’s behavior. Since emotions are involved in human natural communication, and emotion has a significant impact on humans’ actions, it is important to develop an emotional model for the robot partner… More >

  • Open Access

    ARTICLE

    Validation of a Self-Assessment Scale for Therapists’ Perception of Cognitive Behavioural Therapy Skills in China: A Mixed Method

    Yan Liu1,#, Zhihua Guo1,#, Yun Ma1, Hongyan Song1, Xiaoqi Li1, Ling Tan1, Zhanjiang Li1,*, Jing Sun2,*

    International Journal of Mental Health Promotion, Vol.22, No.2, pp. 39-57, 2020, DOI:10.32604/IJMHP.2020.011438

    Abstract Cognitive behavioural therapy (CBT) is a first-line psychotherapy in Western countries, yet there have been limited studies examined the required skills based on perception of CBT therapists in the context of Western countries, and there has been no such research in China. Currently, there is no exist of a selfassessment scale to evaluate the required competence perceived by CBT therapists in China. This study used both qualitative and quantitative method to develop a self-assessment tool by CBT therapist to provide their perception about required skills in the treatment of mental disorders in China. Qualitative research used semistructured behavioural event interviews… More >

  • Open Access

    ARTICLE

    Cognitive dysfunction is associated with abnormal responses in cerebral blood flow in patients with single ventricular physiology: Novel insights from transcranial Doppler ultrasound

    Rachel Wong1, Mohammed Al‐Omary2, David Baker2, Neil Spratt1,2, Andrew Boyle1,2, Natasha Baker Cert1, Peter Howe1, Nicholas Collins2

    Congenital Heart Disease, Vol.14, No.4, pp. 638-644, 2019, DOI:10.1111/chd.12763

    Abstract Objectives: Improvements in the management of complex congenital heart disease, including those with single ventricle physiology, have resulted in increased survival. As this population ages, the recognition of cognitive impairment is increasingly im‐ portant. At present, little is known about the potential mechanisms of cognitive dys‐ function. In this cross‐sectional study, we aimed to characterize the nature of abnormalities in cerebral blood flow and the relationship to cognitive deficits in adults with single ventricular physiology.
    Patients: Ten adults with single ventricular physiology (age 18‐40 years) and 12 age‐ and gender‐matched controls underwent transcranial Doppler ultrasound and ac‐ companying cognitive assessment.
    More >

  • Open Access

    ARTICLE

    Neurocognitive functioning in adults with congenital heart disease

    Dawn Ilardi1,2, Kim E. Ono1,2, Rebecca McCartney3, Wendy Book4, Anthony Y. Stringer2

    Congenital Heart Disease, Vol.12, No.2, pp. 166-173, 2017, DOI:10.1111/chd.12434

    Abstract Objective: Adults with congenital heart disease (CHD) are at increased risk of psychological disorders and cognitive deficiencies due to structural/acquired neurological abnormalities and neurodevelopmental disorders as children. However, limited information is known about the neuropsychological functioning of adults with CHD. This study screened neuropsychological abilities and explored group differences related to cardiac disease severity and neurological risk factors in adults with CHD.
    Design: Participants completed brief neuropsychological testing. Information about neurobehavioral and psychological symptoms, employment, education, and disability were also collected from the patient and a family member.
    Results: Forty-eight participants with adult CHD completed neuropsychological testing. Visuospatial skills and… More >

  • Open Access

    ARTICLE

    Identifying self‐reported neurocognitive deficits in the adult with congenital heart disease using a simple screening tool

    Ashley Brunmeier1,2, Michael P Reis3, Michael G. Earing1,2, Laura Umfleet 4, Salil Ginde1,2, Peter J. Bartz1,2, Scott Cohen1,2

    Congenital Heart Disease, Vol.13, No.5, pp. 728-733, 2018, DOI:10.1111/chd.12646

    Abstract Objective: Children with congenital heart disease (CHD) and adults with acquired heart disease are at an increased risk of neurocognitive impairment. The objective of this study was to determine the prevalence of self‐reported neurocognitive impair‐ ment and its risk factors in the adult congenital heart disease (ACHD) population.
    Design: The Wisconsin Adult Congenital Heart Disease Program recently began screening ACHD patients to identify those with significant self‐perceived neurocog‐ nitive impairments. Screening consists of using a validated neuro‐oncology screening instrument that has been modified for the ACHD population. Patients who answer this survey in a predetermined fashion consistent with significant self‐perceived… More >

  • Open Access

    ARTICLE

    Power Control and Routing Selection for Throughput Maximization in Energy Harvesting Cognitive Radio Networks

    Xiaoli He1, 2, Hong Jiang1, *, Yu Song1, 3, Muhammad Owais4

    CMC-Computers, Materials & Continua, Vol.63, No.3, pp. 1273-1296, 2020, DOI:10.32604/cmc.2020.09908

    Abstract This paper investigates the power control and routing problem in the communication process of an energy harvesting (EH) multi-hop cognitive radio network (CRN). The secondary user (SU) nodes (i.e., source node and relay nodes) harvest energy from the environment and use the energy exclusively for transmitting data. The SU nodes (i.e., relay nodes) on the path, store and forward the received data to the destination node. We consider a real world scenario where the EH-SU node has only local causal knowledge, i.e., at any time, each EH-SU node only has knowledge of its own EH process, channel state and currently… More >

  • Open Access

    ARTICLE

    Association between Economic Activity and Cognitive Health: A Population-Based Observational Study

    Jae Hyun Kim1, Tae Hyun Kim2,3,*

    International Journal of Mental Health Promotion, Vol.22, No.1, pp. 1-9, 2020, DOI:10.32604/IJMHP.2020.010995

    Abstract This study investigates whether restricted participation in productive activity is associated with cognitive health in Korea. Furthermore, given the enormous socioeconomic disparities between aging and gender differences in employment, we also examine whether these associations vary by gender and age. Data from the Korean Longitudinal Study of Ageing (KLoSA) from 2006 to 2016 was used and 9,942 subjects were included at baseline in 2006. To analyze the association between restricted economic activity due to health condition and cognitive function, generalized estimating equation (GEE) model and chi-square test were used. Of the 9,942 individuals at baseline in 2006, the odds ratio… More >

  • Open Access

    ARTICLE

    Neurocognitive and executive functioning in adult survivors of congenital heart disease

    Leda Klouda1, Wayne J. Franklin1, Anita Saraf1,2, Dhaval R. Parekh1, David D. Schwartz3

    Congenital Heart Disease, Vol.12, No.1, pp. 91-98, 2017

    Abstract Objective: Congenital heart disease (CHD) can affect the developing central nervous system, resulting in neurocognitive and behavioral deficits. Preoperative neurological abnormalities as well as sequelae of the open heart operations required to correct structural abnormalities of the heart contribute to these deficits. There are few studies examining the neurocognitive functioning of adults with CHD. This study sought to investigate multiple domains of neurocognitive functioning in adult survivors of CHD who had childhood cardiac surgery with either moderate or severe disease complexity.
    Design: A total of 48 adults (18–49 years of age) who had undergone cardiac surgery for CHD prior to… More >

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