Ongoing Connectivity Research Articles

Analysis of changes in river connectivity during the urbanization process: a case study of the southeastern plain of Yinzhou, China.

Affected by human activities, the naturally occurring river network in the southeastern plain of Yinzhou has gradually evolved into a natural-artificial composite water system, and changes in river connectivity due to changes in river network systems have caused water security problems, including urban flooding. To clarify the river connectivity change and its relationship with the urbanization process, this paper discusses an evaluation method for river connectivity based on complex networks and cellular automata (CA) from the perspective of complex systems, quantitatively analyzes the spatial-temporal characteristics of the structural and functional river connectivity in the study area during the 1990s-2020s, and reveals the impact of river nodes and chains on the connectivity level under the disturbance of natural or human factors. The results contained the following revelations: ① River connectivity showed a decreasing trend in the initial and rapid development stages of urbanization from the 1990s to the 2010s and a limited increasing trend in the optimization and upgrading stages from the 2010s to the 2020s. ② River network degradation and ongoing connectivity decline are found in the northeastern part of the study area. The highest river connectivity exists in Dongqianhukaifaqu. ③ The number of river nodes and chains should be maintained at approximately 80% for normal river connectivity. The nodes of high degree in the inflow area are listed in the key protection areas. ④ Changes in river connectivity are significantly correlated with the urbanization process. Changes in the functional connectivity level affect the magnitude of a flood. This study provides a theoretical basis for river network connectivity improvement and flood prevention in plain areas.

Seasonal and synoptic spatio-temporal variability on larval delivery mechanisms inferred from mussel settlement patterns in the Portuguese coast

Demographic connectivity is the process by which population persistence and growth are affected by the dispersal of individuals. In sessile marine species that disperse by planktonic larvae and form metapopulations, the interaction between oceanographic forcing and larval biology drives the spatial extent and magnitude of larval delivery to suitable habitat patches. The present study investigates the supply of Mytilus galloprovincialis larvae to rocky intertidal habitats located within and around two marine protected areas (MPA) in central Portugal, one located on the exposed coast and the other one in a sheltered bay, using time series of settlement intensity and oceanographic variables. The results indicate that larval delivery at short time scales (days) is strongly dependent on the interaction of upwelling circulation with coastline topography. In the exposed MPA, located on a coastal island, the magnitude of mussel larval delivery is limited by the dynamics of an upwelling front and filament that intercepts the island as upwelling increases and decreases. In the sheltered bay, under an upwelling shadow, the upwelling front promotes recirculation of the water mass, intensifying larval retention and settlement. The results are also consistent with larval transport distances of tens of kilometres and ongoing connectivity between the two MPA. This study highlights the relevance of coastal topography and its interaction with mesoscale hydrodynamics in the modulation of larval delivery, crucial for the persistence of populations and communities and in systematic conservation planning.

(Re)membering and (Re)claiming in My Mama’s Kitchen: A Decolonial Feminist Video-Cued Qi Ethnography

In this study, I draw upon Endarkened Feminist Epistemology (Dillard, 2012) and Decolonial Feminist Research (Rhee, 2020) to explore the epistemology of my mother, a first-generation Chinese immigrant. Based on data generated from the video-cued qi ethnography methodology, I pay attention to my Mama’s ways of knowing as she cooks in the kitchen. Qi is a Chinese concept that means breath, spirit, and life force. I draw on qi as the ongoing connectivity toward wholeness and movement toward harmony in the way I collected and analyzed data. I share my findings as a series of interconnected poetry, images, and narratives to (re)member my mother’s life as well as mine as we (re)claim what we have forgotten and (re)turn to a place of wholeness. I conclude the article by exploring the implications for the Asian American Pacific Islander community and beyond, as we conduct the work of collective rememory.

The Comedy-Scape in Apartheid South Africa: A Historical Overview

Comedy during the apartheid era was an integral medium for indoctrination and pacification. It was also a key instrument through which the apartheid regime was contested, and, in the later years leading up to democracy, a means of promoting the nation-building and cultural reconciliation rhetoric. This notwithstanding, its history during this period remains poorly researched and documented both in academia, specifically, and more broadly in the entertainment and media industry. This article therefore traces the development and practice of comedy in the country under apartheid rule, paying attention to how shifts in content, delivery across platforms and stylistic choices mirror changes in the country’s socio-political landscape. By exploring South African comedy from a historical perspective, this article further highlights the ongoing connectivity of politics and comedy in a way that simultaneously encapsulates issues of space, place and citizenship in evocative ways.

Characterization of Riparian Tree Communities along a River Basin in the Pacific Slope of Guatemala

Ecosystem conservation in Mesoamerica, one of the world’s biodiversity hotspots, is a top priority because of the rapid loss of native vegetation due to anthropogenic activities. Riparian forests are often the only remaining preserved areas among expansive agricultural matrices. These forest remnants are essential to maintaining water quality, providing habitats for a variety of wildlife and acting as biological corridors that enable the movement and dispersal of local species. The Acomé river is located on the Pacific slope of Guatemala. This region is heavily impacted by intensive agriculture (mostly sugarcane plantations), fires and grazing. Most of this region’s original forest is now restricted to forest remnants concentrated along the riverbank. However, the botanical composition and species diversity of the riparian communities has not been characterized. This baseline information is essential to develop restoration strategies and management plans. This study aimed to characterize the riparian tree communities along the Acomé riverbank by systematically collecting herbarium specimens and photographic material for trees over 10 cm DBH (diameter at breast height). Cluster analysis was used to identify the main riparian communities, and diversity indices were calculated for each community. A total of 115 tree species were identified, belonging to 91 genera and 43 families. The cluster analysis suggested the presence of four riparian tree communities along an altitudinal gradient. Rhizophora mangle, Cecropia obtusifolia, Guazuma ulmifolia, and Brosimum costaricanum were the dominant species of the identified communities. This research will support ongoing restoration efforts and biological connectivity plans in this region.

Simulator to Monitor Connectivity Simplified using a BASIC Software GUI

Background: Inter-manufacturer compatibility between manikins has consistently been an issue in healthcare simulation. Differences in scenario programming products, electronic communication protocols, and even in terminology create problems for simulation technical staff and simulation manikin users. One issue that has been especially problematic is the need for dedicated virtual patient monitors for each simulation manikin brand, and often for different simulators within the same brand. This causes additional work for setups, wear and tear on equipment and staff, and ongoing connectivity issues. Solution: Using freely available software, simulation technical staff created an easy to use software application that executed computer batch files to automatically connect manikins to the virtual patient monitor regardless of manikin brand or model. Discussion: Beginners' All-purpose Symbolic Instruction Code (BASIC) programming language was used to create an interface that reconfigured the computer to allow presentation of the manikin’s virtual patient monitor. The Graphic User Interface (GUI) allows simulation users without technical background to select the manikin being used and have that manikin’s vital signs and wave forms displayed. Creation of the application and GUI has eliminated the need for virtual patient monitors to be dedicated to specific manikins. Outcome: Implementation of the application and GUI has increased operational efficiencies in the simulation center by eliminating the need for dedicated monitors for specific manikins, created more stable connections with manikins, and reduced wear and tear on staff and equipment from moving monitors throughout the center.

Deafness Weakens Interareal Couplings in the Auditory Cortex

The function of the cerebral cortex essentially depends on the ability to form functional assemblies across different cortical areas serving different functions. Here we investigated how developmental hearing experience affects functional and effective interareal connectivity in the auditory cortex in an animal model with years-long and complete auditory deprivation (deafness) from birth, the congenitally deaf cat (CDC). Using intracortical multielectrode arrays, neuronal activity of adult hearing controls and CDCs was registered in the primary auditory cortex and the secondary posterior auditory field (PAF). Ongoing activity as well as responses to acoustic stimulation (in adult hearing controls) and electric stimulation applied via cochlear implants (in adult hearing controls and CDCs) were analyzed. As functional connectivity measures pairwise phase consistency and Granger causality were used. While the number of coupled sites was nearly identical between controls and CDCs, a reduced coupling strength between the primary and the higher order field was found in CDCs under auditory stimulation. Such stimulus-related decoupling was particularly pronounced in the alpha band and in top–down direction. Ongoing connectivity did not show such a decoupling. These findings suggest that developmental experience is essential for functional interareal interactions during sensory processing. The outcomes demonstrate that corticocortical couplings, particularly top-down connectivity, are compromised following congenital sensory deprivation.

Hierarchical population structure of a rare lagomorph indicates recent fragmentation has disrupted metapopulation function

An understanding of genetic diversity and population structure is important to the conservation of declining species within fragmented habitats. These issues become critical for small, isolated populations, in which stochasticity is a main driver of genetic change and possibly of population extinction. In eastern New York and New England the endemic New England cottontail has declined due to habitat loss and fragmentation. As a species that exhibits metapopulation dynamics, habitat fragmentation can have profound implications for its persistence. We examined genetic diversity, population structure, and effective population size (Ne) of New England cottontails in New York, a purported remnant stronghold for the species. We amplified ten microsatellite loci from tissues collected from live-captures and from fecal pellets. We investigated potential hierarchical population structuring using programs STRUCTURE and BAPS. STRUCTURE identified four hierarchical tiers consisting of nine clusters, and BAPS clustering was highly consistent with that given by STRUCTURE. Most populations displayed significant genetic differentiation (FST = 0.04–0.34) and little to no evidence of ongoing connectivity. Low genetic diversity was observed based on allelic richness (2.2–3.0), and all populations had critically low effective population sizes (Ne; 2.7–57.1). Observed trends in population subdivision, genetic diversity, and Ne were consistent with reported trends in the state-endangered Maine-New Hampshire populations, and not indicative of a genetic stronghold within New York. Instead, the small and isolated populations observed here imply a breakdown in metapopulation functionality indicative of conditions faced by the species range-wide and an immediate need for human intervention to restore connectivity and rebuild populations.

The Australian Royal Commission into the Aged Care Industry 2019

In the light of various complaints about the quality of care provided by and operation of aged care facilities across Australia, the Commonwealth Government has announced a Royal Commission into the activities of the sector. As the proportion of Australians over 65 continues to grow with the ageing of the ‘Baby Boomer’ generation, more Australians are seeking secure aged care arrangements to meet their increasingly complex living and healthcare needs. We hear much comment today about the concept of healthy ageing and the importance of older people staying connected to and active in their communities. Not only does this ongoing connectivity support better lifestyles and health status, it provides an avenue for older people to contribute to the support of others once their more formal working lives are concluded. Unfortunately, the gap between the rhetoric and the reality of ageing in Australia is strained and it appears that much about the operations of the aged care sector today is less than satisfactory. While some well-funded retirees can afford comfortable and fulfilling living arrangements, many others are left in less ideal circumstances. With aged care organisations currently building the next generation of ‘hotel’ style living arrangements for cashed up self-funded retirees, others are being left behind financially and in terms of the quality of their care. At the same time, maltreatment and abuse of residents is coming to light, as in the ‘Oakden Nursing Home’ situation in South Australia, for example. Consequently, the Federal Government has now launched a formal inquiry into the activities of organisations running aged care facilities in Australia. The inquiry is designed to assess the operation of this industry with a focus on the economics of aged care centres, the quality of care, the food and recreational activities provided and the challenge of staffing these facilities to keep residents safe and well as they age in dignity.

Workforce Capacity and Capability Building Through Metrics-Based Mentoring Partnerships

Background: Globally, cancer is the second leading cause of death. Low- and middle-income countries (LMICs) especially lack the sufficient healthcare and oncology workforces needed to screen, diagnose and treat individuals with cancer. While traditional academic and training programs designed to produce healthcare professionals in these countries fill a critical role, few programs exist that maintain, develop, and increase the knowledge, skills, and professional performance of current healthcare and oncology workforces. Mentoring partnerships and twinning programs can provide ongoing education and training that strengthen and build workforce capacity and capability for the full scope of cancer care. Aim: The goal is to achieve resource-appropriate multimodality cancer-care using guideline- and protocol-based education and training and also to develop the capability to conduct world quality research. The model utilizes in-person, in-country site visits lasting from several weeks to months and ongoing connectivity through weekly telemedicine video conferences. Methods: The International Cancer Expert Corps (ICEC) and partner organizations are establishing a network of global and multisectoral partnerships that builds human capacity and capability needed to establish sustainable cancer programs that function at world-class standards. The three-fold mentor-mentee approach ( www.iceccancer.org ) is built by 1) enlisting hubs of expertise to include academic medical centers/universities, private practices and an ICEC Central Hub, 2) enrolling the breadth of expert-mentors needed from a university, practice, professional society and interested individuals, and 3) identifying centers in LMICs - clinics/hospitals/and other care delivery sites in underserved areas, and associates - physicians/allied healthcare workers- seeking mentoring and education. Results: Recent implementation of the ICEC 5-Step Progression Plan provides guidance and serves as an assessment tool for measuring progress between the hubs-centers programs and expert-associate. Twinning programs (hubs-ICEC centers) have been established in multiple sites worldwide including in Africa, Asia and Eurasia. Conclusion: Implementation of the ICEC 5-Step Progression Plan provides a platform from which to track the current stages and progress of twinning mentor-mentee programs, and to evaluate new programs. This information guides the programs and also provides metric-based investment in global health. Critically as the skills in associates and ICEC centers grows, they achieve expert-mentor status and centers become hubs to serve the surrounding regions, thereby enabling geometric growth in cancer care to meet the needs of the growing global burden of cancer. The content is the personal opinion of the authors and not their organizations.

Education, Training and Ongoing Updating for High-Quality Cancer Care: Programs and Technology for Tumor Boards and Case Discussions

Background: The rapid advance in new knowledge of cancer etiology, creation of treatment guidelines, new technologies and medicines into routine practice and the need to understand cost and efficacy that underlie policy are daunting. Remaining current must be accomplished on top of increasingly busy clinical care requirements and patient numbers requires novel solutions. Education and training opportunities are available from professional societies, cancer programs, paid courses and written reviews, though person-to-person mentorship and expert opinion are vital to navigate the vast amount of information. Aim: To provide experience-based insight into addressing the challenge for professionals to maintain one's expertise in cancer care in countries at all income levels. Methods: The International Cancer Expert Corps and partner organizations are establishing a global and multisectoral network that builds human capacity and capability to establish sustainable cancer programs that function at world-class standards ( www.iceccancer.org ). The model utilizes in-person, in-country visits along with ongoing connectivity through telemedicine video conferences. The pioneering education Chartrounds program ( www.chartrounds.com ) is an example of initiative taken by those “in the field” which began in the U.S. and has recently expanded to include separate Web sites for India, Africa, and Latin America. Results: Chartrounds.com, a free Web-based conferencing platform providing disease-site based educational peer review sessions, exemplifies how global expertise can be shared, altruistic education is willingly provided by world-renowned experts and a method of providing practice changing education is possible while the responsibility for the decision-making and treatment implementation remain with the individual treatment center. Weekly experience by Chartrounds and ICEC is defining the complexity of telecommunications, especially problematic with low capacity bandwidth that tests the capacity for effective teleconferences requiring high-quality voice and image data. Conclusion: The enormous body of knowledge needed by cancer practitioners to provide state-of-the-art cancer care requires creative solutions for education, mentorship and telecommunications. That major research institutions such as the National Cancer Institute has invested in developing TELESYNERGY enhances the quality of cancer care and research that are necessary at the global level. Newer platforms are rapidly emerging and artificial intelligence and machine learning will soon assist with education and quality assurance tasks. For UICC members, recognizing present and emerging solutions is critical to best invest in resources and necessary personnel skill-sets to “leapfrog” into the newer enabling technology and approaches to help bring the best possible cancer care into resource-limited environments. The content is the personal opinion of the authors and not their organizations.

Dynamic Influence of Ongoing Brain Stimulation on Resting State fMRI Connectivity: A Concurrent tDCS-fMRI Study.

Transcranial direct current stimulation (tDCS) is an emerging non-invasive neuromodulation technique that serves as treatment tool to neurological disorders. However, the mechanism of how the stimulation modulates ongoing brain activity and connectivity is still not fully understood. Simultaneous acquisition of neuroimaging data together with brain stimulation could allow a noninvasive examination of the brain dynamic changes during the process. In this pilot study, concurrent tDCS and fMRI was conducted in a healthy subject. Dynamic functional connectivity and effective connectivity were used to reveal the information flow. The results demonstrated that tDCS duration has important effects on the brain connectivity and the causal relationships among the brain regions. These results might reflect the fundamental mechanism of brain processing under the external stimulation.

P.035 Correlation of thalamic connectivity with the duration of epilepsy in patients with temporal lobe epilepsy

Background: Morphometry and connectivity studies targeting the thalamus have revealed specific patterns of atrophy and deafferentiation in patients with temporal lobe epilepsy (TLE). We used probabilistic tractography to investigate thalamic connectivity with respect to duration of epilepsy and surgical outcomes in TLE. Methods: Patients (N=20) with drug-resistant TLE (10 short duration (<15 years), 10 long duration (>15 years)) were scanned with multi-parametric 3T MRI and compared with 34 healthy controls. The Harvard-Oxford atlas was modified to create 14 target regions in the temporal lobes. Probabilistic tractography (FSL) was used to delineate thalamic sub-regions most connected to each target. The volume, mean T1, T2, FA and MD of each thalamic sub-region was quantified. Surgical success was quantified using Engel outcome scores. Results: Significant decreases in thalamic connected volumes to the hippocampus in patients with longer duration of TLE were revealed. Likewise, when stratified based on surgical success, significant differences in diffusion metrics to the hippocampus, parahippocampal gyrus, and temporal neocortex were found. Significant differences did not withstand false discovery rate (FDR) correction. Conclusions: These findings suggest ongoing connectivity changes dependent on epilepsy duration and promote further investigation into the use of thalamic connectivity data as biomarkers for predicting surgical outcomes in TLE patients.

Internet Governance Capacity Building in Post-Authoritarian Contexts. Telecom Reform and Human Rights in Myanmar

Myanmar is undergoing profound socio-political transitions, including rapid developments of its telecommunication infrastructures and related policy frameworks that involves both infrastructural and governance challenges. By focusing on the various stages of the connectivity building plan over the first 3 years since its launch in 2012, this paper explores how Myanmar is developing its internet policy capacity building, in the framework of the broader transnational internet governance debate. In particular, this paper addresses whether and how the new national telecom infrastructure and the related governance framework has been designed and implemented in respect of digital rights, notably freedom of expression and right of privacy. By process tracing the initiatives shaping the on-going connectivity building plan, the paper discusses the role of actors involved in this process, including civil society organizations, private companies, and foreign governments; whether we are witnessing any bottom up forms of internet governance practices; opportunities and eventual threats for citizens related to the implementation this connectivity plan; and finally, it tests and proposes a novel empirically driven theoretical framework aiming at expanding our understanding on the diffusion of global internet governance norms in developing connectivity in post-authoritarian contexts.

Differential lateralization of hippocampal connectivity reflects features of recent context and ongoing demands: An examination of immediate post‐task activity

Neuroimaging studies have shown that task demands affect connectivity patterns in the human brain not only during task performance but also during subsequent rest periods. Our goal was to determine whether ongoing connectivity patterns during rest contain information about both the current rest state, as well as the recently terminated task. Our experimental design consisted of two types of active tasks that were followed by two types of low-demand rest states. Using this design, we examined whether hippocampal functional connectivity during wakeful rest reflects both features of a recently terminated task and those of the current resting-state condition. We identified four types of networks: (i) one whose connectivity with the hippocampus was determined only by features of a recently terminated task, (ii) one whose connectivity was determined only by features of the current resting-state, (iii) one whose connectivity reflected aspects of both the recently terminated task and ongoing resting-state features, and (iv) one whose connectivity with the hippocampus was strong, but not affected by any external factor. The left and right hippocampi played distinct roles in these networks. These findings suggest that ongoing hippocampal connectivity networks mediate information integration across multiple temporal scales, with hippocampal laterality moderating these connectivity patterns.

Regional genetic subdivision in the Mohave ground squirrel: evidence of historic isolation and ongoing connectivity in a Mojave Desert endemic

AbstractThe Mojave Desert is characterized by a unique biodiversity and is an area of particular interest for the development of renewable energy facilities, which could impact habitat quality and population connectivity. To begin understanding current habitat connectivity in a Mojave Desert endemic, we examine population genetic characteristics of the Mohave ground squirrel, Xerospermophilus mohavensis. We use microsatellite and mitochondrial data to examine the spatial distribution of genetic variation and to infer regional demographic history and connectivity across the species' range. We also examine the demographic history of individual populations and assess the degree to which X. mohavensis may be hybridizing with its sister species, Xerospermophilus tereticaudus. We find that populations of X. mohavensis group into three regionally defined genetic clusters with admixture among the groups. Patterns of regional genetic subdivision and inferred patterns of colonization are consistent with what would be expected from the location and timing of the historic lake and river systems of the region. On a more recent timescale, most X. mohavensis populations do not appear to have experienced genetic bottlenecks, as would be expected from known population declines. Finally, we find that hybridization between X. mohavensis and X. tereticaudus is limited, and thus, not a source of introgression into the threatened species. The patterns of diversity and regional connectivity that we describe here for the Mohave ground squirrel are a first step in determining critical conservation areas for endemic Mojave Desert fauna.

Splintering Urbanism or Split Agendas? Examining the Spatial Distribution of Technology Access in Relation to ICT Policy in Durban, South Africa

Changes in the composition, distribution and availability of information and communication technology (ICT) have taken place in the past two decades. Digital technology is now a ubiquitous business requirement, whilst the availability of mobile/cellular telephones has ensured on-going connectivity. Little has been published on the distribution of ICT and other networked infrastructure in developing countries. This paper seeks to address that by examining Durban, South Africa. The spatial distribution of new technology access is examined in relation to urban change and the city’s ICT policy. It becomes evident that current spatial patterns mirror overall investment patterns. Whilst the city’s policy claims to address distribution and access, its innovations are focused on the business sector, rather than last-mile access, essentially reflecting spatial inequalities.

Asymmetric dispersal of southern bull-kelp (Durvillaea antarctica) adults in coastal New Zealand: testing an oceanographic hypothesis.

Coastal populations are often connected by unidirectional current systems, but the biological effects of such asymmetric oceanographic connectivity remain relatively unstudied. We used mtDNA analysis to determine the phylogeographic origins of beach-cast bull-kelp (Durvillaea antarctica) adults in the Canterbury Bight, a 180 km coastal region devoid of rocky-reef habitat in southern New Zealand. A multi-year, quantitative analysis supports the oceanographically derived hypothesis of asymmetric dispersal mediated by the north-flowing Southland Current. Specifically, 92% of beach-cast specimens examined had originated south of the Bight, many drifting north for hundreds of kilometres, and some traversing at least 500 km of ocean from subantarctic sources. In contrast, only 8% of specimens had dispersed south against the prevailing current, and these counter-current dispersers likely travelled relatively small distances (tens of kilometres). These data show that oceanographic connectivity models can provide robust estimates of passive biological dispersal, even for highly buoyant taxa. The results also indicate that there are no oceanographic barriers to kelp dispersal across the Canterbury Bight, indicating that other ecological factors explain the phylogeographic disjunction across this kelp-free zone. The large number of long-distance dispersal events detected suggests drifting macroalgae have potential to facilitate ongoing connectivity between otherwise isolated benthic populations.