title: Modelling the effects of tidal range and initial bathymetry on the morphological evolution of tidal embayments

authors: van Maanen, Barend

subjects: Channel networks

abstract: Tidal embayments are characterized by a wide variety of landscape features, often including either complex tidal channel networks or extensive flood-tidal deltas. The origin of these features and the influence of hydrodynamic drivers and initial geological setting on their long-term characteristics are essentially unexplored. A model was applied to simulate the long-term morphological evolution of tidal embayments, with the purpose of providing insight into the environmental conditions that lead to the differences in tidal embayment morphology. Numerical simulations indicated that the interaction between hydrodynamics, sediment transport, and the evolving topography gives rise to the formation of channel networks. The tidal range and the depth of the initially unchannelized tidal basin controlled the way in which the morphology evolved and determined the timescale over which channels and intertidal areas developed. Channel network formation occurred more rapidly when the tidal range increased and/or when the initial basin depth decreased. Tidal basins with a large initial depth showed the development of a flood-tidal delta and for these deep basins channel incision could remain absent over long timescales. Both tidal range and initial bathymetry affected final basin hypsometry and channel network characteristics, including the channel density and the fraction of the basin occupied by the channels. All the simulated morphologies, with different combinations of the tidal range and depth of the basin, evolved towards a state of less morphodynamic activity for which the relative intertidal area was proportional to the ratio of tidal amplitude to basin depth.

text: Modelling the effects of tidal range and initial bathymetry on the morphological evolution of tidal embayments Tidal embayments are characterized by a wide variety of landscape features, often including either complex tidal channel networks or extensive flood-tidal deltas. The origin of these features and the influence of hydrodynamic drivers and initial geological setting on their long-term characteristics are essentially unexplored. A model was applied to simulate the long-term morphological evolution of tidal embayments, with the purpose of providing insight into the environmental conditions that lead to the differences in tidal embayment morphology. Numerical simulations indicated that the interaction between hydrodynamics, sediment transport, and the evolving topography gives rise to the formation of channel networks. The tidal range and the depth of the initially unchannelized tidal basin controlled the way in which the morphology evolved and determined the timescale over which channels and intertidal areas developed. Channel network formation occurred more rapidly when the tidal range increased and/or when the initial basin depth decreased. Tidal basins with a large initial depth showed the development of a flood-tidal delta and for these deep basins channel incision could remain absent over long timescales. Both tidal range and initial bathymetry affected final basin hypsometry and channel network characteristics, including the channel density and the fraction of the basin occupied by the channels. All the simulated morphologies, with different combinations of the tidal range and depth of the basin, evolved towards a state of less morphodynamic activity for which the relative intertidal area was proportional to the ratio of tidal amplitude to basin depth.

year: 2013

title: The Symbiotic Existence of Interorganizational and Interpersonal Networks in Collaboration

authors: Ekanayake, Kankanamalage Chamila Samanthi

subjects: Social network perspective

abstract: Most traditional theories adopted to explain collaboration in interorganizational relationships (IOR) have failed to adequately address the micro and macro dynamics of the phenomenon. Collaboration theory developed within the mainstream of public administration research views leveraging structure, processes, and people as the key to successful collaboration. Yet, the applicability of the theory’s principles and abstractions in the private sector remains unexplored. Social network theory also presumes that IOR arise out of ongoing interaction at both micro and macro levels. However, the field is fragmented, with the interpersonal and interorganizational networks being studied separately. Thus, an opportunity exists to combine collaboration theory with social network perspective and to view interorganizational collaboration from a multilevel lens.
An exploratory case study methodology informed by an interpretivist epistemological stance was used to address this gap. An egocentric network of a third party logistics company that covers six relationships provided a rich context for the study. 
The study finding expands our understanding of the distinction between the two types of networks: the interorganizational and the interpersonal and their corresponding elements - which are the structural and processual ties and the workflow and commercial friendship ties rspectively. By proposing a new conceptualization ─ ‘a symbiotic existence’ to explain the interdependent nature of these four elements, the study goes beyond the traditional micro and macro divide to consider the multiplexity of networks in IOR.The major practical implication of this study is that the decision makers should pay attention to the changes in both micro and macro elements and their knock-on effects to ensure a symbiosis of the four elements for collaborative synergies. Practitioners’ attention should also centre significantly on the effects of interpersonal networks on collaboration and how mechanisms at macro level could be set effectively to benefit from the emerging community of practices within the collaboration.

text: The Symbiotic Existence of Interorganizational and Interpersonal Networks in Collaboration Most traditional theories adopted to explain collaboration in interorganizational relationships (IOR) have failed to adequately address the micro and macro dynamics of the phenomenon. Collaboration theory developed within the mainstream of public administration research views leveraging structure, processes, and people as the key to successful collaboration. Yet, the applicability of the theory’s principles and abstractions in the private sector remains unexplored. Social network theory also presumes that IOR arise out of ongoing interaction at both micro and macro levels. However, the field is fragmented, with the interpersonal and interorganizational networks being studied separately. Thus, an opportunity exists to combine collaboration theory with social network perspective and to view interorganizational collaboration from a multilevel lens.
An exploratory case study methodology informed by an interpretivist epistemological stance was used to address this gap. An egocentric network of a third party logistics company that covers six relationships provided a rich context for the study. 
The study finding expands our understanding of the distinction between the two types of networks: the interorganizational and the interpersonal and their corresponding elements - which are the structural and processual ties and the workflow and commercial friendship ties rspectively. By proposing a new conceptualization ─ ‘a symbiotic existence’ to explain the interdependent nature of these four elements, the study goes beyond the traditional micro and macro divide to consider the multiplexity of networks in IOR.The major practical implication of this study is that the decision makers should pay attention to the changes in both micro and macro elements and their knock-on effects to ensure a symbiosis of the four elements for collaborative synergies. Practitioners’ attention should also centre significantly on the effects of interpersonal networks on collaboration and how mechanisms at macro level could be set effectively to benefit from the emerging community of practices within the collaboration.

year: 2015

title: The Wairua of Self: A Path of Love, Simplicity, and Connectedness

authors: Frishman, Lezlie

subjects: love

abstract: Love is an action of freedom until something else steps in – often fear – that insists we create a box of survival. Whether self-imposed, forced, or chosen, it is interesting to notice how we limit ourselves with love. This thesis examines love; love in its purest intent and creation as the simplest way to live. An analysis of personal experiences, illuminated by psychological, mythological, philosophical, and spiritual literature, suggests that living from a place of love can be accomplished through a dedicated journeying back to the Self. The Māori myth of Tāne-Mahuta and Hine-Tītama shows the significance of releasing shame, as well as how a tragic situation might offer a catalytic possibility that shifts a core belief about one’s self. The complications of love that are self-created through loss and grief can easily mask the barely underlying truth of love in its nakedness. Reconnecting with this underlying truth, aroha in its purest sense, is essential for healing and allows for increased connection with the Divine. Doing so is often a difficult task, as hypocrisies fueled by fear and perpetuated by blame are bountiful. When love is used as an instrument and convenience in order to defend a closely held idea, person, or way of life, one often moves further from their true Self, thus surrendering their deepest power and knowing of love. The silent assault of expectations, power, will, and control can turn love into a complication. The complications of being utterly human only serve to further obscure love. Within families, how one initially learns love is often complicated by interrupted attachment, causing rebellion and the need to look for love elsewhere. The components of Tikkun Olam, aroha, mikveh, and wairua of spirit, are intertwined and interconnected, such that the delineation between cultures and spiritual beliefs cannot be divided as oppositional forces. The denominator lives in the magnitude of love for all that has been created; beginning with the Self. In setting the foundation of self-love and allowing it to settle into the fractures and rifts of porousness, love may then be extended without attachment. When freely proffered without agenda, love will seep into every curve of the universe; thus, changing the world. Through the practice of mindfulness and loving-kindness, perception can change. It is this change in perception which can return love to its origin of simplicity. This thesis is a story of love.

text: The Wairua of Self: A Path of Love, Simplicity, and Connectedness Love is an action of freedom until something else steps in – often fear – that insists we create a box of survival. Whether self-imposed, forced, or chosen, it is interesting to notice how we limit ourselves with love. This thesis examines love; love in its purest intent and creation as the simplest way to live. An analysis of personal experiences, illuminated by psychological, mythological, philosophical, and spiritual literature, suggests that living from a place of love can be accomplished through a dedicated journeying back to the Self. The Māori myth of Tāne-Mahuta and Hine-Tītama shows the significance of releasing shame, as well as how a tragic situation might offer a catalytic possibility that shifts a core belief about one’s self. The complications of love that are self-created through loss and grief can easily mask the barely underlying truth of love in its nakedness. Reconnecting with this underlying truth, aroha in its purest sense, is essential for healing and allows for increased connection with the Divine. Doing so is often a difficult task, as hypocrisies fueled by fear and perpetuated by blame are bountiful. When love is used as an instrument and convenience in order to defend a closely held idea, person, or way of life, one often moves further from their true Self, thus surrendering their deepest power and knowing of love. The silent assault of expectations, power, will, and control can turn love into a complication. The complications of being utterly human only serve to further obscure love. Within families, how one initially learns love is often complicated by interrupted attachment, causing rebellion and the need to look for love elsewhere. The components of Tikkun Olam, aroha, mikveh, and wairua of spirit, are intertwined and interconnected, such that the delineation between cultures and spiritual beliefs cannot be divided as oppositional forces. The denominator lives in the magnitude of love for all that has been created; beginning with the Self. In setting the foundation of self-love and allowing it to settle into the fractures and rifts of porousness, love may then be extended without attachment. When freely proffered without agenda, love will seep into every curve of the universe; thus, changing the world. Through the practice of mindfulness and loving-kindness, perception can change. It is this change in perception which can return love to its origin of simplicity. This thesis is a story of love.

year: 2011