Local Recovery Research Articles

Algebraic hierarchical locally recoverable codes with nested affine subspace recovery

AbstractCodes with locality, also known as locally recoverable codes, allow for recovery of erasures using proper subsets of other coordinates. These subsets are typically of small cardinality to promote recovery using limited network traffic and other resources. Hierarchical locally recoverable codes allow for recovery of erasures using sets of other symbols whose sizes increase as needed to allow for recovery of more symbols. In this paper, we describe a hierarchical recovery structure arising from geometry in Reed–Muller codes and codes with availability from fiber products of curves. We demonstrate how the fiber product hierarchical codes can be viewed as punctured subcodes of Reed–Muller codes, uniting the two constructions. This point of view provides natural structures for local recovery with availability at each level in the hierarchy.

Embedding the Third Mission of universities in humanitarian crisis response: Profiling the role of the University of Duhok in addressing health needs of internally displaced people and refugees

This article attempts to contribute to the debates on the role of the higher education sector in addressing the immediate and long-term challenges incurred as a result of humanitarian crises. The focal point of consideration is profiling the role of the University of Duhok, Iraq, in addressing health needs of internally displaced people and refugees. The article demonstrates the nexus between the so-called Third Mission and the range of responses the University provides to support the health needs of displaced populations in Duhok Governorate. It is argued that the higher education sector has to be recognised and positioned as a key stakeholder in the process of humanitarian relief and local recovery.

The therapeutic use of clonal neural stem cells in experimental Parkinson´s disease

BackgroundParkinson´s disease (PD), the second most common neurodegenerative disease in the world, is characterized by the death or impairment of dopaminergic neurons (DAn) in the substantia nigra pars compacta and dopamine depletion in the striatum. Currently, there is no cure for PD, and treatments only help to reduce the symptoms of the disease, and do not repair or replace the DAn damaged or lost in PD. Cell replacement therapy (CRT) seeks to relieve both pathological and symptomatic PD manifestations and has been shown to have beneficial effects in experimental PD models as well as in PD patients, but an apt cell line to be used in the treatment of PD has yet to be established. The purpose of this study was to examine the effects of the transplantation of hVM1 clone 32 cells, a bankable line of human neural stem cells (hNSCs), in a PD mouse model at four months post-transplant.MethodsAdult (five month-old) C57BL/6JRccHsd male mice were injected with 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine and subsequently transplanted with hVM1 clone 32 cells, or buffer, in the left striatum. Four months post-transplant, behavioral effects were explored using the open field and paw print tests, and histological analyses were performed.ResultsTransplantation of hVM1 clone 32 cells rescued dopaminergic nigrostriatal populations in adult Parkinsonian mice. Motor and neurological deterioration were observed in buffer-treated mice, the latter of which had a tendency to improve in hNSC-transplanted mice. Detection of mast cell migration to the superficial cervical lymph nodes in cell-transplanted mice denoted a peripheral effect. Transplantation of hNSCs also rescued neuroblast neurogenesis in the subgranular zone, which was correlated with dopaminergic recovery and is indicative of local recovery mechanisms.ConclusionsIn this proof-of-concept study, the transplantation of hVM1 clone 32 cells provided neuroprotection in adult Parkinsonian mice by restoring the dopaminergic nigrostriatal pathway and hippocampal neurogenesis, demonstrating the efficacy of cell replacement therapy as a treatment for PD.

Study on the recovery temperature and overall cooling effectiveness of the different profiles of the blade under the condition of non-uniform turbine inlet temperature

The Overall Cooling Effectiveness (OCE) is a crucial parameter for the evaluation of the cooling performance of blades in modern gas turbines. However, studies on the local recovery temperature are seldom addressed in the context of the OCE. In this paper, the local recovery temperature and OCE were measured by thermocouples innovatively installed at S2, S5, and S8 profiles having blade heights of 20 %, 50 %, and 80 %, respectively. These were performed under the condition of non-uniform turbine inlet temperature. The cascade pressure ratios of 1.4–1.9 for the OEC tests were similar to those of the recovery temperature tests. The other operating conditions for the OEC tests included the KG in the range of 0.02–0.07 and the KT in the range of 2.0–3.2. Numerical simulation was conducted to analyze the coupling effect of the non-uniform cascade inlet temperature, the passage vortex, and the blade tip leakage vortex. The obtained results showed that the passage vortex led to a marked recovery temperature drop at the trailing edge of the 20% blade height profile compared with the other two profiles at all the cascade pressure ratios. The change of the cascade pressure ratio significantly affected the recovery temperature of the 80 % blade height profile compared with the other two profiles. The differences of the recovery temperature distribution on three blade profiles strongly depended on the distribution of the turbine inlet temperature, the action region of the passage vortex and the tip leakage vortex. The OCE of the three profiles showed the different distributions along the mainstream direction. In the radical direction, the averaged OCE was the highest for the S8 profile, followed by the S5 profile, while S2 profile recorded the lowest value. Finally, based on experimental data collected throughout this study, a correlation equation was established pertaining to averaged OCE.

A fault tolerant node placement algorithm for WSNs and IoT networks

The operation of Internet of Things (IoT) Network and Wireless Sensor Networks (WSNs) can be often disrupted by a number of factors, such as node faults, security attacks, as well as path disconnections. Despite any disruptions or any failures of network components the functionality and performance of the network should remain unaltered. An approach that can assist in resolving the above issues is the use of mobile nodes. In this work, we present a Fault Tolerant Node Placement Algorithm (FTNPA) that utilizes mobile nodes for addressing failures in the network. We initially propose a Mobile Fault Tolerant (MobileFT) Framework, that supplies the two main functionalities of the Fault Tolerant Node Placement Algorithm (FTNPA), which are the detection and the recovery. Then, we present two variations of the FTNPA algorithm, the Decentralized FTNPA and the Centralized FTNPA. The first variation uses a decentralized detection method, where the detection is performed by the neighboring nodes in the network, as well as a local recovery method, where a mobile node is placed in a certain position to assist the affected area. Whereas, the second variation employs a centralized detection method, where the sink is responsible for the detection, and a recovery method that creates alternatives paths of mobile nodes towards a destination node. Simulation results show that the proposed algorithms can significantly contribute to the detection and recovery of faults in IoT Networks and WSNs.

Determining the efficiency of local heat recycling wastewater based on a heat exchanger

RELEVANCE. The authors research the potential energy, economic and environmental effects of using local heat recovery from wastewater generated in showers. At the moment in Russia, almost all household wastewater is disposed of in sewer networks without the beneficial use of the heat that they possess. It is important to determine the effect of implementing this method of heat recovery, to identify and analyze the problems that prevent this from being done.THE PURPOSE. The purpose of the work is to determine the potential effect of using local heat recovery from wastewater generated in showers.METHODS. Based on a verified mathematical model of the heat exchanger, the energy effect from the individual use of the shower room is determined. A number of assumptions are applied to the heat consumption structure of an individual building and, based on available data on the average annual heat consumption of residential buildings in Moscow, the economic and environmental effect of energy-saving measures is calculated.RESULTS. Relative savings within the annual heat consumption of a building with a decentralized and centralized hot water supply system were 5,3% and 3,1%, respectively (64 and 37 GCal). Fuel economy amounted to: 9145 toe and 5227 toe for a building with a decentralized and centralized hot water supply system, respectively (14,5 and 8,5 thousand tons of CO2-eq). The payback period for energy-saving measures for the case of a decentralized hot water system based on an instantaneous electric water heater was 1,5 years.CONCLUSION. Local waste heat recovery makes it possible to obtain a significant energy and environmental effect within any locality, but at the moment there are no measures to support consumers implementing energy-saving measures. Currently, this method of heat recovery is of interest only to those consumers whose source of thermal energy for the needs of hot water supply is electricity.

Harnessing Social Capital for Post-COVID-19 Resilience: A Study of Asian Businesses in New York City

Prior studies have explored how Asian businesses leverage social capital for success, but little attention has been given to its role in disaster recovery. This study addresses this gap by highlighting social capital’s impact on recovery strategies. Twenty-three business interviews were conducted in Chinatown, Manhattan, NYC, and the research unveils that ethnic social capital, including co-ethnic labor, secured market access, in-kind support, and information sharing, constitutes instrumental resources for their recovery. Moreover, it is linked to the intersecting identities—immigrant, minority, and Asian. These findings underscore the importance of comprehending ethnic social capital to foster both business resilience and local economic recovery.

Measurement of local Nusselt number and local recovery factor for impinging multiple compressible jets

In the present study the appropriate reference temperature is identified for the compressible impinging jet. Using the measured reference temperature, local recovery factor is calculated. The steady state thin metal foil technique is used for the measurement of target plate temperature. In this study, the effect of Mach number (Ma) at a constant Reynolds number (Re) and the combined effect of Mach number and Reynolds number on the heat transfer rate are investigated. For both the cases, jet-to-plate distance is varied from z/d = 5 to 12. For the first case (effect of Mach number at a constant Re = 20,000), Ma is varied from 0.15 to 0.85. In the second case (combined effect of Mach number and Reynolds number), Ma is varied from 0.2 to 0.78 and the corresponding Re variation is 7200 to 29,000. At a constant Reynolds number, the heat transfer coefficient increases with the increase in the Mach number. For a given Mach number and Reynolds number, the heat transfer rate decreases with the increase in the jet-to-plate distance. The recovery factor remains unaffected by the Mach number and jet-to-plate distance in the case of the concurrent variation of the Mach number and Reynolds number.

Using Systematic Conservation Planning to Identify Climate Resilient Habitat for Endangered Species Recovery While Retaining Areas of Cultural Importance

The effective management of at-risk species often requires fine-scale actions by natural resource managers. However, balancing these actions with concurrent land uses is challenging, particularly when compounded by the interplay of climate shifts, and escalating wildland–urban interface conflicts. We used spatial prioritization tools designed for biodiversity conservation to help resource managers on the Island of Lānaʻi prioritize mutually exclusive land use objectives: endangered species recovery and subsistence and recreational hunting. We weighed the current and anticipated future distributions of threatened and endangered plant species against the distribution of non-native game mammals to plan for species recovery more effectively. Prioritization results identified multiple footprints that could support recovery of all endangered species targets in climate resilient areas while retaining the majority of existing hunting areas. However, very little native vegetation was retained in conservation footprints without deliberate inclusion, which increased footprint area by 268%. Scenarios which prioritized contiguous conservation areas also dramatically increased conservation footprint area, although these scenarios may reduce associated fencing costs. This work demonstrates how spatial prioritization may guide localized species recovery efforts by supporting long-term conservation planning that addresses anticipated climate-driven increases in conflict between conservation and other land uses, with clear applicability beyond Lānaʻi.

Comparison of juvenile coral assemblages between Australia’s Coral Sea and Great Barrier Reef Marine Parks

Densities of juvenile corals (≤ 50 mm diameter) are expected to vary between geographically isolated and more spatially proximate reefs, and may constrain local recovery potential. This study compared juvenile coral densities and their relationships with local abundance of adult congenerics at geographically isolated reefs within Australia’s Coral Sea Marine Park (CSMP) versus highly connected reefs within the Great Barrier Reef Marine Park (GBRMP). Three latitudinal regions and two habitats (reef crest and slope) were examined within both marine parks to test for spatial variation. Densities of juvenile corals in the CSMP (13.99 ± 0.72 juveniles 10 m−2) were significantly lower compared to those in the GBRMP (23.72 ± 1.86 juveniles 10 m−2). Specifically, there were significantly less Acropora and Pocillopora juveniles on the reef crest in the central CSMP compared to the GBRMP. Relationships between juvenile abundance and percent coral cover were greatest for Acropora and Pocillopora in the GBRMP. This may be due to the low range of coral cover estimates recorded in the CSMP, especially for Acropora (0–15%). Low juvenile coral abundance, and in particular, the lack of fast-growing juvenile corals (e.g., Acropora) in the Central CSMP, in combination with low cover of broodstock (particularly Acropora) on CSMP reefs, poses a significant constraint on post-disturbance recovery capacity, possibly attributable to isolation and limited connectivity among reefs in this region.

Dynamics of a susceptible-infected-recovered model on complex networks with interregional migration.

We present a susceptible-infected-recovered model based on a dynamic flow network that describes the epidemic process on complex metapopulation networks. This model views population regions as interconnected nodes and describes the evolution of each region using a system of differential equations. The next-generation matrix method is used to derive the global basic reproduction number for three cases: a general network with homogeneous infection rates in all regions, a fully connected network, and a star network with heterogeneous infection and recovery rates. For the homogeneous case, we show that this global basic reproduction number is independent of the migration rates between regions. However, the rate of convergence of each region to an equilibrium state exhibits a much larger variance in random (Erdős-Rényi) networks compared to small-scale (Barabási-Albert) networks. For the general heterogeneous case, we report interesting results, namely that the global basic reproduction number decays exponentially with respect to the smallest nonzero Laplacian eigenvalue (algebraic connectivity). Furthermore, we demonstrate both analytically and numerically that as the network's algebraic connectivity increases, either by increasing the average node degree of each region or the global migration rate, the global basic reproduction number decreases and converges to the ratio of the average local infection rate to the average local recovery rate, meaning that the lower bound of the global basic reproduction rate does not equal the mean of local basic reproduction rates.

Primary Team Versus Local Recovery in Liver Transplantation in the Modern Era: A National Analysis of the United Network for Organ Sharing Database.

The implementation of acuity circles (AC) in 2020 and the COVID-19 pandemic increased the use of local surgeons to recover livers for transplant; however, the impact on liver transplant (LT) outcomes is unknown. Deceased donor adult LT recipients from the UNOS database were identified. Recipients were grouped by donor surgeon: local versus primary recovery. Patient and graft survival as well as trends in local recovery in the 2 years pre-AC and post-AC were assessed. The utilization of local recovery in LT increased from 22.3% to 37.9% post-AC (p<0.01). LTs with local recovery had longer cold ischemia times (6.5 h [5.4-7.8] vs. 5.3 h [4.4-6.5], p<0.01) and traveled further (210 miles [89-373] vs. 73 miles [11-196], p<0.01) than those using primary recovery. Multivariate analyses revealed no differences in patient or graft survival between local and primary recovery, and between OPO and local surgeon. There was no difference in survival when comparing simultaneous liver-kidney, donation after circulatory death, MELD ≥ 30, or redo-LT by recovery team. Recovery and utilization rates were also noted to be higher post-AC (51.4%vs. 48.6% pre-AC, p<0.01) as well as when OPO surgeons recovered the allografts (72.5%vs. 66.0%, p<0.01). Nearly 40% of LTs are performed using local recovery, and utilization rates and trends continue to change with changing organ-sharing paradigms such as AC. This practice appears safe with outcomes similar to recovery by the primary team in appropriately selected recipients and may lead to increased access and the ability to transplant more livers.

Filling the blindspots: Assessing distributive equity in fund allocation of Florida's local housing program for disaster recovery

Despite the role of local assistance in addressing households' disaster recovery needs, few studies have examined the role of localized programs in filling the gaps that might exist in federal programs. To address the question of whether local recovery funds distribute resources to socially vulnerable neighborhoods and how local assistance fits into the broader federal disaster assistance landscape, we take Florida's State Housing Initiatives Partnership (SHIP) program as a case study. The SHIP program can help fill neighborhood-level gaps left by the Federal Emergency Management Agency's (FEMA) Individual Assistance program by aiding neighborhoods with the higher proportions of 1) those who did not receive federal assistance or 2) those who had residual damages not fully covered by federal assistance. The study finds that SHIP funds typically flow into socially vulnerable neighborhoods with a higher proportion of Black and Hispanic residents, even without specific social or racial equity measures built into program regulations. The study highlights the importance of balancing the consistency of fundamental rules and having flexibility in distributing funds.

Curve-lifted codes for local recovery using lines

AbstractIn this paper, we introduce curve-lifted codes over fields of arbitrary characteristic, inspired by Hermitian-lifted codes over $$\mathbb {F}_{2^r}$$ F 2 r . These codes are designed for locality and availability, and their particular parameters depend on the choice of curve and its properties. Due to the construction, the numbers of rational points of intersection between curves and lines play a key role. To demonstrate that and generate new families of locally recoverable codes (LRCs) with high availabilty, we focus on norm-trace-lifted codes.

Coastal fisheries and community-based support systems in post disaster contexts

Pacific Island Countries and Territories are highly exposed to natural disasters, intensified by increases in frequency and force of extreme weather events. Pacific societies, like in Vanuatu, have been shaped in many ways by such natural disasters; reflected in customary practices and social fabric of rural coastal communities. When a natural disaster occurs, government attention justifiably focuses on channelling and coordinating international humanitarian aid to fill gaps in capacity and resourcing national recovery efforts. However, central to disaster recovery, particularly in the immediate aftermath of disruption, are the ways that local people support each other (within and between communities). Disconnects between national and local recovery efforts are common and stand to inhibit effective responses. This study aims to understand horizontal, self-organised community-to-community support systems and communities’ post-disaster engagement with external aid. It draws from two different datasets: i) the observations collected through the emergency relief work led by the National Disaster Management Office in Vanuatu shortly after the 2023 twin tropical cyclones Judy and Kevin hit the country, as well as ii) the loss and damage survey led by the Vanuatu Fisheries Department to estimate the level of damage these cyclones caused in various regions of Vanuatu. Through this process, we highlight the social systems that enable community-to-community support, as well as potential opportunities for external-aid to support communities in a more efficient manner. Results reveal that community-to-community support is critical in the first weeks post-disaster. Recognizing the roles that different support networks play at different stages of disaster response is critical not only to improving people's and institutions' ability to bounce back from particular disruptions, but also in broader efforts to strengthen community resilience in the face of climate change.

Ultrasonic Healing of Plastrons.

Superhydrophobic surfaces (SHS) exhibit a pronounced ability to resist wetting. When immersed in water, water does not penetrate between the microstructures of the SHS. Instead, a thin layer of trapped gas remains, i.e., plastron. This fractional wetting is also known as the Cassie-Baxter state (CB). Impairment of superhydrophobicity occurs when water penetrates the plastron and, when complete wetting is achieved, a Wenzel state (W) results. Subsequent recovery back to CB state is one of the main challenges in the field of SHS wetting. Current methods for plastron recovery require complex mechanical or chemical integration, are time-consuming or lack spatial control. Here an on-demand, contact-less approach for performing facile transitions between these wetting states at micrometer length scales is proposed. This is achieved by the use of acoustic radiation force (ARF) produced by high-intensity focused ultrasound (HIFU). Switching from CB to W state takes <100 µs, while the local recovery back to CB state takes <45 s. To the best of authors knowledge, this is the first demonstration of ARF-induced manipulation of the plastron enabling facile two-way controlled switching of wettingstates.

Psychosocial Support After Galodo in Jorong Panti, Nagari Rambatan, Tanah Datar

The Galodo disaster that struck Jorong Panti, Rambatan District, Tanah Datar, not only caused physical damage but also had a significant impact on the psychosocial condition of the community. The loss of homes, family members, and livelihoods created a need for assistance that goes beyond material support, emphasizing the importance of psychosocial care. This community service program aimed to restore the psychosocial condition of disaster victims, reduce post-disaster trauma, enhance community skills and knowledge, and support local economic recovery. The method used in this service was Participatory Action Research (PAR), allowing direct community involvement in the recovery process. Activities included psychological support for families and children, reviving Quranic learning programs (TPA) that had stopped, enhancing early childhood literacy through storytelling and drawing, and organizing political education to prepare for local elections, as well as entrepreneurship workshops to reignite the survivors' work spirit and improve their skills. The results of this program show that the psychosocial assistance provided successfully reduced trauma impacts, particularly on children, and increased community participation in social and religious activities. Additionally, the entrepreneurship and political education programs contributed positively to local economic recovery and improved the community’s political awareness. In the final week, the program concluded with religious competitions and cultural performances as a form of appreciation and an effort to strengthen social traditions and values. In conclusion, this community service program had a positive impact on the psychosocial and economic recovery of the Jorong Panti community following the Galodo disaster by actively involving the community in every phase of recovery

Restoration of vegetation in the Yellow River Basin of Inner Mongolia is limited by geographic factors

Studying the relationships between vegetation cover and geography in the Mongolian region of the Yellow River Basin will help to optimize local vegetation recovery strategies and achieve harmonious human relations. Based on MOD13Q1 data, the spatial and temporal variations in fractional vegetation cover (FVC) in the Mongolian Yellow River Basin during 2000–2020 were investigated via trend and correlative analysis. The results are as follows: (1) From 2000 to 2020, the vegetation cover in the Mongolian section of the Yellow River Basin recovered well, the mean increase in the FVC was 0.001/a, the distribution of vegetation showed high coverage in the southeast and low coverage in the northwest, and 31.19% of the total area showed an extremely significant and significant increase in vegetation cover. (2) The explanatory power of each geographic factor significantly differed. Precipitation, soil type, air temperature, land use type and slope were the main driving factors influencing the spatial distribution of the vegetation cover, and for each factor, the explanatory power of its interaction with other factors was greater than that of the single factor. (3) The correlation coefficients between FVC and temperature and precipitation are mainly positive. The mean value of the FVC and its variation trend are characterized by differences in terrain and soil characteristics, population density and land use. Land use conversion can reflect the characteristics of human activities, and positive effects, such as returning farmland to forest and grassland and afforestation of unused land, promote the significant improvement of regional vegetation, while negative effects, such as urban expansion, inhibit the growth of vegetation.

Building cross-sector recovery collaborations after Australian bushfires: the importance of embracing and linking diverse capitals and capacities

ABSTRACT The literature on disaster management highlights that communities that mobilise and integrate a range of local capacities, resources and knowledges tend to fare best. This demonstrates the critical, yet underappreciated, role these attributes play in disaster management. This paper contributes to scholarship by examining the conditions, values and practices for building effective cross-sector ties. Importantly, it highlights the need for decentralised, cross-sector supports for building community recovery (increasingly known as ‘polycentric’ disaster governance). It reports on the results of a local community engagement program after country-wide bushfires in Australia (2019–20). Participatory action planning is used in two regional communities and ethnographic methods are employed to glean the experience and learnings from local recovery workers (n = 5). Findings support calls for embracing and linking diverse capacities post-disaster to boost social capital and invest in local knowledges. Focus is given to bonding, bridging and linking capital, the importance of capacity ‘redundancy’, and the role of trust, serendipity, and ‘culture brokers’ in identifying, mobilising and integrating diverse capacities and resources to support community-centered disaster recovery. Findings are used to fine-tune understandings of cross-sector ties that enable communities to move beyond a passive stance.

Unique attributes of official endorsers in destination marketing

Along with the digital transformation of the administrative environment and the end of the COVID-19 pandemic, official endorsers have nurtured a new channel for tourism destination marketing, which is of great significance to local economic recovery. However, less attention has been paid to the different effects of endorsement between ordinary endorsers and official endorsers, mainly due to their contrasting social statuses. To bridge the research gap, the source credibility model and social identity theory are integrated to construct the distinctive attributes of officials, as well as structural equation model is utilized to explore the underlying mechanism of official endorsement. Findings indicate that trustworthiness, the sense of authority, expertise, and attractiveness have direct positive effects on official identification, while also indirectly influencing tourists’ attitudes toward the destination through official identification. These findings provide theoretical and managerial implications for the local government managers involved in tourism destination marketing.