The Experts below are selected from a list of 43221 Experts worldwide ranked by ideXlab platform

Dongho Cho - One of the best experts on this subject based on the ideXlab platform.

  • a harmonization among power saving class in the ieee 802 16e systems
    Consumer Communications and Networking Conference, 2010
    Co-Authors: Sangwook Kwon, Dongho Cho
    Abstract:

    The power saving mechanisms of the current IEEE 802.16e system are designed to take no consideration of the harmonization between power saving classes (PSCs) I and II. Hence, we propose a harmonized power saving mechanism between PSC I and PSC II to increase Unavailability interval when a mobile station (MS) uses PSCs. The proposed mechanism adjusts the timing of the sleep window of PSC I to maximize the Unavailability interval of the MSs. As a result, the proposed mechanism achieves power saving of the MSs. Through the simulation, we show that the proposed mechanism can reduce the power consumption of the MSs considerably compared with conventional mechanisms.

  • enhanced power saving through increasing Unavailability interval in the ieee 802 16e systems
    IEEE Communications Letters, 2010
    Co-Authors: Sangwook Kwon, Dongho Cho
    Abstract:

    The power saving mechanisms of the current IEEE 802.16e system are designed to take no consideration of the harmonization between power saving classes (PSCs) I and II. Using the IEEE 802.16e standard as a basis, we propose a dynamic power saving mechanism that increases Unavailability interval when a mobile station (MS) uses PSCs. The proposed mechanism adjusts the timing of the sleep window of PSC I to maximize the Unavailability interval of the MSs. As a result, the proposed scheme achieves power saving of the MSs. Through numerical analysis and simulations, we show that the proposed mechanism can reduce the power consumption of the MSs considerably compared with conventional mechanisms.

  • dynamic power saving mechanism for mobile station in the ieee 802 16e systems
    Vehicular Technology Conference, 2009
    Co-Authors: Sangwook Kwon, Dongho Cho
    Abstract:

    In wireless communication system, power saving mechanism is a key issue since the mobile station operates depending on limited power. Hence, the IEEE 802.16e system provides three types of power saving classes (PSC I, PSC II and PSC III) for mobile station (MS) to reduce the power consumption. When the MS is using two or more power saving classes, the MS reduces the power consumption only during time interval that does not overlap with any listening window of active PSC called the Unavailability interval. Therefore, in this paper, based on the IEEE 802.16e standard, we propose a dynamic power saving mechanism (DPSM) that increases Unavailability interval when the MS is using two or more power saving classes (PSCs). The proposed mechanism adjusts sleep window of PSC I (III) to match the start point of listening window in PSC I (III) with that of listening window in PSC II. By doing so, the MS can reduce the listening time, and can increase the Unavailability interval. Through analysis and simulation results, we show that the proposed DPSM can reduce the power consumption of MS with two or more PSCs considerably compared with conventional scheme. Index Terms—IEEE 802.16e, Wireless MAN, MAC, power saving, sleep mode.

Melissa L Sturgeapple - One of the best experts on this subject based on the ideXlab platform.

  • interparental violence maternal emotional Unavailability and children s cortisol functioning in family contexts
    Developmental Psychology, 2012
    Co-Authors: Melissa L Sturgeapple, Patrick T Davies, Dante Cicchetti, Liviah G Manning
    Abstract:

    The goal of the present study was to examine the specificity of pathways among interparental violence, maternal emotional Unavailability, and children’s cortisol reactivity to emotional stressors within the interparental and parent-child relationships. The study also tested whether detrimental family contexts were associated on average with hypocortisolism or hypercortisolism responses to stressful family interactions in young children. Participants included 201 toddlers and their mothers from impoverished backgrounds who experienced disproportionate levels of family violence. Assessments of interparental violence were derived from maternal surveys and interviews, whereas maternal emotional Unavailability was assessed through maternal reports and observer ratings of caregiving. Salivary cortisol levels were sampled at three timepoints before and after laboratory paradigms designed to elicit children’s reactivity to stressful interparental and parent-child contexts. Results indicated that interparental violence and mother’s emotional Unavailability were differentially associated with children’s adrenocorticol stress reactivity. Furthermore, these family risk contexts predicted lower cortisol change in response to distress. The results are interpreted in the context of risky family and emotional security theory conceptualizations that underscore how family contexts differentially impact children’s physiological regulatory capacities.

  • interparental conflict and children s school adjustment the explanatory role of children s internal representations of interparental and parent child relationships
    Developmental Psychology, 2008
    Co-Authors: Melissa L Sturgeapple, Patrick T Davies, Marcia A Winter, Mark E Cummings, Alice C Schermerhorn
    Abstract:

    This study examined how children's insecure internal representations of interparental and parent-child relationships served as explanatory mechanisms in multiple pathways linking interparental conflict and parent emotional Unavailability with the emotional and classroom engagement difficulties the children had in their adjustment to school. With their parents, 229 kindergarten children (127 girls and 102 boys, mean age = 6.0 years, SD = .50, at Wave 1) participated in this multimethod, 3-year longitudinal investigation. Findings revealed that children's insecure representations of the interparental relationship were a significant intervening mechanism in associations between observational ratings of interparental conflict and child and teacher reports on children's emotional and classroom difficulties in school over a 2-year period. Moreover, increased parental emotional Unavailability accompanying high levels of interparental conflict was associated with children's insecure representations of the parent-child relationship and children's difficulties in classroom engagement at school entry. The findings highlight the importance of understanding the intrinsic processes that contribute to difficulties with stage-salient tasks for children who are experiencing interparental discord.

  • impact of hostility and withdrawal in interparental conflict on parental emotional Unavailability and children s adjustment difficulties
    Child Development, 2006
    Co-Authors: Melissa L Sturgeapple, Patrick T Davies, Mark E Cummings
    Abstract:

    This multimethod, prospective study examined the nature of pathways between interparental hostility and withdrawal, parental emotional Unavailability, and subsequent changes in children's internalizing and externalizing behaviors, and school adjustment difficulties over a 3-year period in a sample of 210 mothers, fathers, and 6-year-old children. The results of autoregressive structural equation models indicated that interparental withdrawal had a detrimental impact on all areas of children's adjustment, whereas interparental hostility had an indirect effect on subsequent changes in child adjustment. An intermediary role of parental emotional Unavailability in links between interparental withdrawal and hostility and child outcomes was indicated, with specific, differential effects observed for fathers and mothers.

  • hostility and withdrawal in marital conflict effects on parental emotional Unavailability and inconsistent discipline
    Journal of Family Psychology, 2006
    Co-Authors: Melissa L Sturgeapple, Patrick T Davies, Mark E Cummings
    Abstract:

    This study examined the nature of pathways between marital hostility and withdrawal, parental disagreements about child rearing issues, and subsequent changes in parental emotional Unavailability and inconsistent discipline in a sample of 225 mothers, fathers, and 6-year-old children. Results of autoregressive, structural equation models indicated that marital withdrawal and hostility were associated with increases in parental emotional Unavailability over the one-year period, whereas marital hostility and withdrawal did not predict changes in parental inconsistency in discipline. Additional findings supported the role of child rearing disagreements as an intervening or mediating mechanism in links between specific types of marital conflict and parenting practices. Implications for clinicians and therapists working with maritally distressed parents and families are discussed.

Mark E Cummings - One of the best experts on this subject based on the ideXlab platform.

  • interparental conflict and children s school adjustment the explanatory role of children s internal representations of interparental and parent child relationships
    Developmental Psychology, 2008
    Co-Authors: Melissa L Sturgeapple, Patrick T Davies, Marcia A Winter, Mark E Cummings, Alice C Schermerhorn
    Abstract:

    This study examined how children's insecure internal representations of interparental and parent-child relationships served as explanatory mechanisms in multiple pathways linking interparental conflict and parent emotional Unavailability with the emotional and classroom engagement difficulties the children had in their adjustment to school. With their parents, 229 kindergarten children (127 girls and 102 boys, mean age = 6.0 years, SD = .50, at Wave 1) participated in this multimethod, 3-year longitudinal investigation. Findings revealed that children's insecure representations of the interparental relationship were a significant intervening mechanism in associations between observational ratings of interparental conflict and child and teacher reports on children's emotional and classroom difficulties in school over a 2-year period. Moreover, increased parental emotional Unavailability accompanying high levels of interparental conflict was associated with children's insecure representations of the parent-child relationship and children's difficulties in classroom engagement at school entry. The findings highlight the importance of understanding the intrinsic processes that contribute to difficulties with stage-salient tasks for children who are experiencing interparental discord.

  • impact of hostility and withdrawal in interparental conflict on parental emotional Unavailability and children s adjustment difficulties
    Child Development, 2006
    Co-Authors: Melissa L Sturgeapple, Patrick T Davies, Mark E Cummings
    Abstract:

    This multimethod, prospective study examined the nature of pathways between interparental hostility and withdrawal, parental emotional Unavailability, and subsequent changes in children's internalizing and externalizing behaviors, and school adjustment difficulties over a 3-year period in a sample of 210 mothers, fathers, and 6-year-old children. The results of autoregressive structural equation models indicated that interparental withdrawal had a detrimental impact on all areas of children's adjustment, whereas interparental hostility had an indirect effect on subsequent changes in child adjustment. An intermediary role of parental emotional Unavailability in links between interparental withdrawal and hostility and child outcomes was indicated, with specific, differential effects observed for fathers and mothers.

  • hostility and withdrawal in marital conflict effects on parental emotional Unavailability and inconsistent discipline
    Journal of Family Psychology, 2006
    Co-Authors: Melissa L Sturgeapple, Patrick T Davies, Mark E Cummings
    Abstract:

    This study examined the nature of pathways between marital hostility and withdrawal, parental disagreements about child rearing issues, and subsequent changes in parental emotional Unavailability and inconsistent discipline in a sample of 225 mothers, fathers, and 6-year-old children. Results of autoregressive, structural equation models indicated that marital withdrawal and hostility were associated with increases in parental emotional Unavailability over the one-year period, whereas marital hostility and withdrawal did not predict changes in parental inconsistency in discipline. Additional findings supported the role of child rearing disagreements as an intervening or mediating mechanism in links between specific types of marital conflict and parenting practices. Implications for clinicians and therapists working with maritally distressed parents and families are discussed.

Patrick T Davies - One of the best experts on this subject based on the ideXlab platform.

  • interparental violence maternal emotional Unavailability and children s cortisol functioning in family contexts
    Developmental Psychology, 2012
    Co-Authors: Melissa L Sturgeapple, Patrick T Davies, Dante Cicchetti, Liviah G Manning
    Abstract:

    The goal of the present study was to examine the specificity of pathways among interparental violence, maternal emotional Unavailability, and children’s cortisol reactivity to emotional stressors within the interparental and parent-child relationships. The study also tested whether detrimental family contexts were associated on average with hypocortisolism or hypercortisolism responses to stressful family interactions in young children. Participants included 201 toddlers and their mothers from impoverished backgrounds who experienced disproportionate levels of family violence. Assessments of interparental violence were derived from maternal surveys and interviews, whereas maternal emotional Unavailability was assessed through maternal reports and observer ratings of caregiving. Salivary cortisol levels were sampled at three timepoints before and after laboratory paradigms designed to elicit children’s reactivity to stressful interparental and parent-child contexts. Results indicated that interparental violence and mother’s emotional Unavailability were differentially associated with children’s adrenocorticol stress reactivity. Furthermore, these family risk contexts predicted lower cortisol change in response to distress. The results are interpreted in the context of risky family and emotional security theory conceptualizations that underscore how family contexts differentially impact children’s physiological regulatory capacities.

  • interparental conflict and children s school adjustment the explanatory role of children s internal representations of interparental and parent child relationships
    Developmental Psychology, 2008
    Co-Authors: Melissa L Sturgeapple, Patrick T Davies, Marcia A Winter, Mark E Cummings, Alice C Schermerhorn
    Abstract:

    This study examined how children's insecure internal representations of interparental and parent-child relationships served as explanatory mechanisms in multiple pathways linking interparental conflict and parent emotional Unavailability with the emotional and classroom engagement difficulties the children had in their adjustment to school. With their parents, 229 kindergarten children (127 girls and 102 boys, mean age = 6.0 years, SD = .50, at Wave 1) participated in this multimethod, 3-year longitudinal investigation. Findings revealed that children's insecure representations of the interparental relationship were a significant intervening mechanism in associations between observational ratings of interparental conflict and child and teacher reports on children's emotional and classroom difficulties in school over a 2-year period. Moreover, increased parental emotional Unavailability accompanying high levels of interparental conflict was associated with children's insecure representations of the parent-child relationship and children's difficulties in classroom engagement at school entry. The findings highlight the importance of understanding the intrinsic processes that contribute to difficulties with stage-salient tasks for children who are experiencing interparental discord.

  • impact of hostility and withdrawal in interparental conflict on parental emotional Unavailability and children s adjustment difficulties
    Child Development, 2006
    Co-Authors: Melissa L Sturgeapple, Patrick T Davies, Mark E Cummings
    Abstract:

    This multimethod, prospective study examined the nature of pathways between interparental hostility and withdrawal, parental emotional Unavailability, and subsequent changes in children's internalizing and externalizing behaviors, and school adjustment difficulties over a 3-year period in a sample of 210 mothers, fathers, and 6-year-old children. The results of autoregressive structural equation models indicated that interparental withdrawal had a detrimental impact on all areas of children's adjustment, whereas interparental hostility had an indirect effect on subsequent changes in child adjustment. An intermediary role of parental emotional Unavailability in links between interparental withdrawal and hostility and child outcomes was indicated, with specific, differential effects observed for fathers and mothers.

  • hostility and withdrawal in marital conflict effects on parental emotional Unavailability and inconsistent discipline
    Journal of Family Psychology, 2006
    Co-Authors: Melissa L Sturgeapple, Patrick T Davies, Mark E Cummings
    Abstract:

    This study examined the nature of pathways between marital hostility and withdrawal, parental disagreements about child rearing issues, and subsequent changes in parental emotional Unavailability and inconsistent discipline in a sample of 225 mothers, fathers, and 6-year-old children. Results of autoregressive, structural equation models indicated that marital withdrawal and hostility were associated with increases in parental emotional Unavailability over the one-year period, whereas marital hostility and withdrawal did not predict changes in parental inconsistency in discipline. Additional findings supported the role of child rearing disagreements as an intervening or mediating mechanism in links between specific types of marital conflict and parenting practices. Implications for clinicians and therapists working with maritally distressed parents and families are discussed.

Sangwook Kwon - One of the best experts on this subject based on the ideXlab platform.

  • a harmonization among power saving class in the ieee 802 16e systems
    Consumer Communications and Networking Conference, 2010
    Co-Authors: Sangwook Kwon, Dongho Cho
    Abstract:

    The power saving mechanisms of the current IEEE 802.16e system are designed to take no consideration of the harmonization between power saving classes (PSCs) I and II. Hence, we propose a harmonized power saving mechanism between PSC I and PSC II to increase Unavailability interval when a mobile station (MS) uses PSCs. The proposed mechanism adjusts the timing of the sleep window of PSC I to maximize the Unavailability interval of the MSs. As a result, the proposed mechanism achieves power saving of the MSs. Through the simulation, we show that the proposed mechanism can reduce the power consumption of the MSs considerably compared with conventional mechanisms.

  • enhanced power saving through increasing Unavailability interval in the ieee 802 16e systems
    IEEE Communications Letters, 2010
    Co-Authors: Sangwook Kwon, Dongho Cho
    Abstract:

    The power saving mechanisms of the current IEEE 802.16e system are designed to take no consideration of the harmonization between power saving classes (PSCs) I and II. Using the IEEE 802.16e standard as a basis, we propose a dynamic power saving mechanism that increases Unavailability interval when a mobile station (MS) uses PSCs. The proposed mechanism adjusts the timing of the sleep window of PSC I to maximize the Unavailability interval of the MSs. As a result, the proposed scheme achieves power saving of the MSs. Through numerical analysis and simulations, we show that the proposed mechanism can reduce the power consumption of the MSs considerably compared with conventional mechanisms.

  • dynamic power saving mechanism for mobile station in the ieee 802 16e systems
    Vehicular Technology Conference, 2009
    Co-Authors: Sangwook Kwon, Dongho Cho
    Abstract:

    In wireless communication system, power saving mechanism is a key issue since the mobile station operates depending on limited power. Hence, the IEEE 802.16e system provides three types of power saving classes (PSC I, PSC II and PSC III) for mobile station (MS) to reduce the power consumption. When the MS is using two or more power saving classes, the MS reduces the power consumption only during time interval that does not overlap with any listening window of active PSC called the Unavailability interval. Therefore, in this paper, based on the IEEE 802.16e standard, we propose a dynamic power saving mechanism (DPSM) that increases Unavailability interval when the MS is using two or more power saving classes (PSCs). The proposed mechanism adjusts sleep window of PSC I (III) to match the start point of listening window in PSC I (III) with that of listening window in PSC II. By doing so, the MS can reduce the listening time, and can increase the Unavailability interval. Through analysis and simulation results, we show that the proposed DPSM can reduce the power consumption of MS with two or more PSCs considerably compared with conventional scheme. Index Terms—IEEE 802.16e, Wireless MAN, MAC, power saving, sleep mode.