Multiple Management Strategies Research Articles

Risk preferences and management strategies of farmers in Ghana: Does the type of crop grown matter?

AbstractThis paper examined the risk preferences and management strategies of cereal and legume farmers of Ghana's savannah zones using both the exploratory factor analysis and the linear regression model. Using primary cross‐sectional data and employing the multistage sampling technique made up of purposive, cluster and random sampling techniques, the paper found that cereal farmers are more risk averse than legume farmers. Rainfall variability was ranked topmost by cereals and legumes farmers. Both cereal and legume farmers employ multiple but dissimilar risk management strategies to manage these sources of risk. The commonest sources of risk to cereal and legume farmers were climate and market risk, while off‐farm activities are the commonest management strategy. Production risk faced by cereal farmers was managed by both off‐farm and farm production strategies whereas human risk faced by legumes farmers was managed by both off‐farm and financial management strategies. The importance of market risk implies that policy initiatives should aim at reducing market‐related risks by focusing on increasing off‐farm opportunities for rural households.

P065 Sleep Perceptions of Carers in Palliative Care: A Qualitative Study

Abstract Introduction Carers of individuals receiving palliative care have heightened responsibilities as part of their role which significantly affects their sleep. Despite the recognised importance of sleep, and the evidence regarding the impact of disturbed sleep on one’s physical and psychological wellbeing, sleep of carers is often overlooked. Furthermore, research regarding the lived experience of carers regarding their sleep is limited. This study aimed to explore carers’ sleep experiences, perceived factors related to sleep, and sleep management strategies that they adopt, in order to inform tailored assessment and sleep interventions for carers of individuals receiving palliative care. Methods Nine carers providing home palliative care were interviewed regarding their sleep experiences. Interviews were audio-recorded, transcribed verbatim and analysed thematically. Results Five key themes were identified: (1) Sleep experiences are complex; (2) Sleep is not the priority; (3) Contributing factors of sleep vary; (4) Multiple sleep management strategies exist; and, (5) Need for carer preparedness and ongoing support; under one overarching theme being “sleep is individual for every carer”. Discussion Sleep is an individualised and complex experience that is perceived differently by carers. To improve carers’ self-appraisal in sleep quality, consideration of personal beliefs and attitudes should be accounted for to aid addressing factors that contribute to carers’ sleep disturbances. Further, carer-specific resources are crucial to improving quality and accessibility of support services (i.e. respite care).

Rate-Splitting Multiple Access for 6G—Part II: Interplay With Integrated Sensing and Communications

This letter is the second part of a three-part tutorial focusing on rate-splitting multiple access (RSMA) for 6G. As Part II of the tutorial, this letter addresses the interplay between RSMA and integrated radar sensing and communications (ISAC). In particular, we introduce a general RSMA-assisted ISAC architecture, where the ISAC platform has a dual capability to simultaneously communicate with downlink users and probe detection signals to a moving target. Then, the metrics of radar sensing and communications are respectively introduced, followed by a RSMA-assisted ISAC waveform design example which jointly minimizes the Cramér-Rao bound (CRB) of target estimation and maximizes the minimum fairness rate (MFR) amongst communication users subject to the per-antenna power constraint. The superiority of RSMA-assisted ISAC is verified through simulation results in both terrestrial and satellite scenarios. RSMA is demonstrated to be a powerful multiple access and interference management strategy for ISAC, and provides a better communication-sensing trade-off compared with the conventional benchmark strategies. Consequently, RSMA is a promising technology for next generation multiple access (NGMA) and future networks such as 6G and beyond.

Ventilator Management in Extremely Preterm Infants.

Advances in ventilation strategies for infants in the NICU have led to increased survival of extremely preterm infants. More than 75% of infants born at less than or equal to 27 weeks' gestation require initial mechanical ventilation for survival due to developmental immaturity of their lungs and respiratory drive. Various ventilators using different technologies and involving multiple management strategies are available for use in this population. Centers across the world have successfully used conventional, high-frequency oscillatory and high-frequency jet ventilation to manage respiratory failure in extremely preterm infants. This review explores the existing evidence for each mode of ventilation and the importance of individualizing ventilator management strategies when caring for extremely preterm infants.

Local and regional sources of urban ambient PM2.5 exposures in Calgary, Canada

Ambient fine size fraction particulate matter (PM2.5) sources in the western Canada city of Calgary, Alberta were identified and their contributions quantified for 2015–2019 based on elemental and ion composition data from sampling at a central monitoring site and the US Environmental Protection Agency Positive Matrix Factorization (v5.0) receptor model. Meaningful source apportionment results were obtained by using reconstructed PM2.5 mass and an estimated unmeasured mass in absence of carbonaceous component measurements. Auxiliary analyses identified source regions. Identified source types and average contribution to PM2.5 were secondary organic aerosol (24%), wood smoke (16%), soil/crustal matter (15%), traffic/rail (14%), particulate sulfate (13%), particulate nitrate (10%), and road salt/aged road salt (9% combined). Calgary PM2.5 contributions of secondary organic aerosol, particulate sulfate, and traffic/rail sources were similar to the next-nearest western city of Edmonton while particulate nitrate contributions were lower, wood smoke impacts greater and other factors showed greater inter-city differences. Secondary PM2.5 contributions in Calgary were consistent with estimates for medium and large cities in central Canada for SOA and particulate nitrate but lower for particulate sulfate. Primary wood smoke PM2.5 contributions were consistent with other Canadian cities and confirmed strong influence of winter season biomass burning. Combined on-road vehicle and rail transportation activity were found to contribute comparably more to ambient PM2.5 in Calgary than in central Canadian cities. Soil/crustal re-suspension/transport and intensive winter-time use of road salts were also important local PM2.5 sources. Several factors were characterized by local sources (traffic/rail, soil/crustal matter, road salt, aged road salt, wood smoke) with episodic regional source contributions (wood smoke, soil/crustal matter) and secondary aerosol factors (SOA, particulate sulfate, particulate nitrate) also demonstrated influence from local sources alongside regional source contributions, indicating that Calgary ambient PM2.5 concentrations are likely strongly influenced by local source emissions. These findings present positive opportunities for multiple air quality management and source mitigation strategies, including at the local/municipal level.

Stimulating the Influence of Teaching Effectiveness and Students’ Learning Motivation by Using the Hierarchical Linear Model

In the context of school learning and teaching, teachers are leaders who stimulate students’ learning outcomes through leadership styles. The teacher efficacy of this study is discussed by using multiple teaching and class management strategies. Because the situation of each school is different, the contingency theory is used to design the research structure. This study changed the original leadership style to the new leadership style; effectiveness to teacher effectiveness; and context to school context, and set them as moderators. Since the unit of analysis is teachers, it is difficult to find factors such as differences in regression coefficients in the school context. Therefore, the HLM hierarchical linear analysis is used, and the school context is set as the second level, and then statistical analysis is performed. Teachers’ leadership styles have significant differences in multiple teaching strategies for teacher effectiveness. Moral leadership and charismatic leadership have a moderating effect on the multiple teaching strategies of teacher effectiveness. The multiple teaching strategies of teacher effectiveness have a significant effect in middle school situations with lower moral leadership. On the other hand, charismatic leadership is more pronounced in middle school situations than in high school situations. Teachers’ leadership styles have a significant impact on classroom management of teacher effectiveness. Under the situational control of schools, moral leadership, charismatic leadership, and supportive leadership have moderating effects on classroom management of teacher effectiveness. When the classroom management of teacher effectiveness is in the middle school situation, low moral leadership is more significant; in the high school situation, charismatic leadership will reduce the effectiveness of the class management; in the moderate or high situation, the higher the support of the leader, the greater the effect of class management.

Can Coastal Habitats Rise to the Challenge? Resilience of Estuarine Habitats, Carbon Accumulation, and Economic Value to Sea-Level Rise in a Puget Sound Estuary

Sea-level rise (SLR) and obstructions to sediment delivery pose challenges to the persistence of estuarine habitats and the ecosystem services they provide. Restoration actions and sediment management strategies may help mitigate such challenges by encouraging the vertical accretion of sediment in and horizontal migration of tidal forests and marshes. We used a process-based soil accretion model (Coastal Wetland Equilibrium Model) combined with a habitat classification model (MOSAICS) to estimate the effects of SLR, suspended sediment, and inland habitat migration on estuarine habitats, soil carbon accumulation, and economic value of climate change mitigation of carbon accumulation (social cost of carbon dioxide) in a macrotidal estuary in the northwest USA over 100 years (2011 to 2110). Under present-day sediment levels, we projected that after 100 years, most high salt marsh would remain with < 100 cm SLR, but substantial area converted to transitional (low) salt marsh and mudflat with ≥ 100 cm SLR. Increasing sediment availability increased the projected resilience of transitional salt marsh to SLR but did not prevent declines in high marsh area. Projected total carbon accumulation plateaued or declined with ≥ 100 cm SLR, yet the economic value of carbon accumulation continued to rise over time, suggesting that the value of this ecosystem service was resilient to SLR. Doubling or tripling sediment availability increased projected carbon accumulation up to 7.69 and 14.2 kg m−2 and increased total economic value up to $373,000 and $710,000, respectively. Allowing marsh migration supported conversion of upland to freshwater marsh, with slight increases in carbon accumulation. These results inform climate adaptation planning for wetland managers seeking to understand the resilience of estuarine habitats and ecosystem services to SLR under multiple management strategies.

Impact of Calonectria Diseases on Ornamental Horticulture: Diagnosis and Control Strategies.

Diseases caused by fungi in the genus Calonectria pose a significant threat to the ornamental horticulture industries in Europe and the United States. Calonectria spp. are particularly challenging pathogens to manage in ornamental production systems and the urban landscape for multiple reasons. A high level of species diversity and poorly resolved taxonomy in the genus makes proper pathogen identification and disease diagnosis a challenge, though recent molecular phylogenetic studies have made significant advances in species delimitation. From a disease management perspective, Calonectria spp. produce long-lived survival structures (microsclerotia) that contaminate nursery production systems and can survive multiple years in the absence of a susceptible plant host. Latent infection of plant material is poorly understood but likely contributes to long-distance dissemination of these fungal pathogens, including the clonal Calonectria spp. responsible for the global emergence of boxwood blight. Breeding for disease resistance represents a sustainable strategy for managing Calonectria diseases but is challenging due to the perennial nature of many ornamental plants and high levels of susceptibility in commercial cultivars. Ultimately, long-term sustainable management of Calonectria diseases will require an improved understanding of pathogen biology as well as integration of multiple disease management strategies.

Synchronized agricultural credit and diversification adoption to catastrophic risk manage for wheat production in Punjab, Pakistan.

In developing countries, particularly in agrarian economies like Pakistan, agricultural production is severely affected by successive incidences of adverse catastrophic risks. Inadequate and limited risk management measures from farming community to overcome such severe financial, production, and marketing risks not enough so need of adoption farm-based feasible risk management strategies. In addressing this research gap, this study investigated the potential association and implementing synchronized agricultural credit and diversification adoption to catastrophic risk manage for wheat production in Punjab, Pakistan. The study used the data of 480 wheat farmers' respondents and employed multinomial and bivariate probit regression models for empirical analysis. Empirical estimates illustrated the significant association in adoption of multiple risk management strategies as addressing the adoption single risk management strategy motivates farmers to adopt another strategy at same time. Furthermore, results also indicated as farmer schooling, age, family return, ownership of land, farm size, and farmer risk oppose character were highlighted the most influenced features for adopting various risk management strategies. Policy makers and state-based authorities can be assisted by these outcomes to evaluating plans of risk management and willingness of farmer in accept government supported regarding implementation of these catastrophic risk managing strategies.

Photosynthetic limits on carbon sequestration in croplands

How much C can be stored in agricultural soils worldwide to mitigate rising carbon dioxide (CO2) concentrations, and at what cost? This question, because of its critical relevance to climate policy, has been a focus of soil science for decades. The amount of additional soil organic C (SOC) that could be stored has been estimated in various ways, most of which have taken the soil as the starting point: projecting how much of the SOC previously lost can be restored, for example, or calculating the cumulative effect of multiple soil management strategies. Here, we take a different approach, recognizing that photosynthesis, the source of C input to soil, represents the most fundamental constraint to C sequestration. We follow a simple “Fermi approach” to derive a rough but robust estimate by reducing our problem to a series of approximate relations that can be parameterized using data from the literature. We distinguish two forms of soil C: ‘ephemeral C’, denoting recently-applied plant-derived C that is quickly decayed to CO2, and ‘lingering C,’ which remains in the soil long enough to serve as a lasting repository for C derived from atmospheric CO2. First, we estimate global net C inputs into lingering SOC in croplands from net primary production, biomass removal by humans and short-term decomposition. Next, we estimate net additional C storage in cropland soils globally from the estimated C inputs, accounting also for decomposition of lingering SOC already present. Our results suggest a maximum C input rate into the lingering SOC pool of 0.44 Pg C yr−1, and a maximum net sequestration rate of 0.14 Pg C yr−1 – significantly less than most previous estimates, even allowing for acknowledged uncertainties. More importantly, we argue for a re-orientation in emphasis from soil processes towards a wider ecosystem perspective, starting with photosynthesis.

Prevalence of Patellofemoral Pain Syndrome Among Sports Sciences Students In Lahore

Patellofemoral pain syndrome is characterized by severe pain around the knee cap during physical activities. Many researches have been done to describe the causes of PFP and it is found that it is multifactorial in nature. It is suggested that Patellofemoral pain can persist for many years and can cause decline in sports participation. Muscular imbalance and over activity are major causes of knee pain in Sports related PFP .Multiple management strategies are used in the intervention protocol of PFP however, more research is required to find potential causes of knee pain and its management in sport sciences. Objective: The aim of this study is to find out prevalence of Patellofemoral Pain Syndrome among Sports Sciences students in Lahore. Methods: This is an observational study; cross sectional survey with 306 estimated sample size 288 participants were respondents but remaining 18 were non respondents and data is collected from students of sports sciences department in mentioned universities using Kujala Scoring questionnaire. Data is entered and analyzed using SPSS version 21. Results: The results shows that age of participants were between 19 to 25 years. Number of male(62.15%) participants were more than female(37.85%) participants .prevalence of PFP among sports sciences students is 63.54%( N=183) with mild or no symptoms of anterior knee pain, 26.74%(N=77) with moderate symptoms and 9.72% (N=28) with severe symptoms of Patellofemoral pain syndrome. Conclusion: According to the results we concluded that there are mild or no symptoms of Patellofemoral Pain Syndrome in 63.54 % Sports Sciences Students in Lahore,26.74 % Sport Sciences Students have moderate symptoms of Anterior Knee joint Pain and 9.72% Sports Sciences Students have severe Symptoms Of Patellofemoral Pain Syndrome

Selection of Genome-Wide SNPs for Pooled Allelotyping Assays Useful for Population Monitoring.

Parasitic worms are serious pests of humans, livestock, and crops worldwide. Multiple management strategies are employed in order to reduce their impact, and some of these may affect their genome and population allelic frequency distribution. The evolution of chemical resistance, ecological changes, and pest dispersal has allowed an increasing number of pests to become difficult to control with current management methods. Their lifestyle limits the use of ecological and individual-based management of populations. There is a need to develop rapid, affordable, and simple diagnostics to assess the efficacy of management strategies and delay the evolution of resistance to these strategies. This study presents a multilocus, equal-representation, whole-genome pooled single nucleotide polymorphisms (SNPs) selection approach as a monitoring tool for the ovine nematode parasite Haemonchus contortus. The SNP selection method used two reference genomes of different quality, then validated these SNPs against a high-quality recent genome assembly. From over 11 million high-quality SNPs identified, 334 SNPs were selected, of which 262 were species-specific, yielded similar allele frequencies when assessed as multiple individuals or as pools of individuals, and suitable to distinguish mixed nematode isolate pools from single isolate pools. As a proof-of-concept, 21 Australian H. contortus populations with various phenotypes and genotypes were screened. This analysis confirmed the overall low level of genetic differentiation between populations collected from the field, but clearly identifying highly inbred populations, and populations showing genetic signatures associated with chemical resistance. The analysis showed that 66% of the SNPs were necessary for stability in assessing population genetic patterns, and SNP pairs did not show linkage according to allelic frequencies across the 21 populations. This method demonstrates that ongoing monitoring of parasite allelic frequencies and genetic changes can be achieved as a management assessment tool to identify drug-treatment failure, population incursions, and inbreeding signatures due to selection. The SNP selection method could also be applied to other parasite species.

Rate-Splitting Multiple Access for Downlink Multiuser MIMO: Precoder Optimization and PHY-Layer Design

Rate-Splitting Multiple Access (RSMA) has recently appeared as a powerful and robust multiple access and interference management strategy for downlink Multi-user (MU) multi-antenna communications. In this work, we study the precoder design problem for RSMA scheme in downlink MU systems with both perfect and imperfect Channel State Information at the Transmitter (CSIT) and assess the role and benefits of transmitting multiple common streams. Unlike existing works which have considered single-antenna receivers (Multiple-Input Single-Output–MISO), we propose and extend the RSMA framework for multi-antenna receivers (Multiple-Input Multiple-Output–MIMO) and formulate the precoder optimization problem with the aim of maximizing the Weighted Ergodic Sum-Rate (WESR). Precoder optimization is solved using Sample Average Approximation (SAA) together with the proposed vectorization and Weighted Minimum Mean Square Error (WMMSE) based approach. Achievable sum-Degree of Freedom (DoF) of RSMA is derived for the proposed framework as an increasing function of the number of transmitted common and private streams, which is further validated by the Ergodic Sum Rate (ESR) performance using Monte Carlo simulations. Conventional MU–MIMO based on linear precoders and Non-Orthogonal Multiple Access (NOMA) schemes are considered as baselines. Numerical results show that with imperfect CSIT, the sum-DoF and ESR performance of RSMA is superior to those of the two baselines, and is increasing with the number of transmitted common streams. Moreover, by better managing the interference, RSMA not only has significant ESR gains over baseline schemes but is more robust to CSIT inaccuracies, network loads and user deployments.

RNAi for Western Corn Rootworm Management: Lessons Learned, Challenges, and Future Directions.

Simple SummaryThe western corn rootworm (WCR), Diabrotica virgifera virgifera LeConte, is an annual pest of maize in the United States Corn Belt. Larval feeding on the root system can promote significant yield loss through reduced water and nutrient uptake and decreased plant stability. Various management tactics, including crop rotation, insecticides, and transgenic crops expressing Bacillus thuringiensis Berliner proteins, have been used to manage WCR densities. However, resistance has evolved to each of these tactics in local areas, highlighting the need for new management strategies. The use of RNA interference (RNAi) technology for WCR management represents the next phase of species-specific pest management. This paper reviews the current knowledge of RNAi for WCR management. We present an overview of traits that have been explored and the accumulated knowledge acquired on mode of action, resistance, ecological risk assessment, and mammalian safety. We conclude by highlighting the challenges and future directions of this technology for WCR management.The western corn rootworm (WCR), Diabrotica virgifera virgifera LeConte, is considered one of the most economically important pests of maize (Zea mays L.) in the United States (U.S.) Corn Belt with costs of management and yield losses exceeding USD ~1–2 billion annually. WCR management has proven challenging given the ability of this insect to evolve resistance to multiple management strategies including synthetic insecticides, cultural practices, and plant-incorporated protectants, generating a constant need to develop new management tools. One of the most recent developments is maize expressing double-stranded hairpin RNA structures targeting housekeeping genes, which triggers an RNA interference (RNAi) response and eventually leads to insect death. Following the first description of in planta RNAi in 2007, traits targeting multiple genes have been explored. In June 2017, the U.S. Environmental Protection Agency approved the first in planta RNAi product against insects for commercial use. This product expresses a dsRNA targeting the WCR snf7 gene in combination with Bt proteins (Cry3Bb1 and Cry34Ab1/Cry35Ab1) to improve trait durability and will be introduced for commercial use in 2022.

Surgical and Endovascular Management of Extracranial Carotid Artery Aneurysms, Outcomes From the American College of Surgeons, National Surgical Quality Improvement Program

Extracranial carotid artery aneurysms (ECAA) are rare and consequentially understudied; yet multiple management strategies for ECAA have been pursued. The goal of this study was to compare rates of stroke and cardiac events following surgical or endovascular management of ECAA utilizing the American College of Surgeons, National Surgical Quality Improvement Program (ACS-NSQIP). The ACS-NSQIP database was queried for patients with both selected procedure codes and diagnostic codes specific for ECAA. 139 patients, 0.2% of carotid procedures, were located within ACS-NSQIP from 2013-2017. The endovascular group (n=19) had a higher proportion of emergency procedures than the open surgical group (n=120). Post-operative strokes in the endovascular group (n=3, 15.8%) were not significantly higher than the open surgical group (n=5, 4.2%; P=0.078). One cardiac event (0.7%) in the cohort occurred in the surgical group. This study provides insight into trends in national management of ECAA. Post-operative stroke rates trended higher with endovascular approaches, perhaps due to traumatic presentation as this group had a higher proportion of emergency procedures. Additionally, this study suggests patients with ECAA may have less cardiac burden than their peers with carotid stenosis.

Secondary health conditions in people with spinal cord injury in South Africa: Prevalence and associated factors.

People with spinal cord injury (SCI) experience preventable secondary health conditions (SHCs) that worsen the disability, reduce the quality of life and affect health and wellbeing. There is limited information on the prevalence of SHCs and the associated factors to inform planning and practice in South Africa (SA). To identify the prevalence of SHCs and the associated factors in people with SCI. We conducted a retrospective review of patients' medical records at a tertiary academic hospital and a rehabilitation hospital in Gauteng Province, SA. Data collected included demographic data, injury profile, SHCs and associated factors. Data were summarised using descriptive statistics of frequency and percentages. Fisher's exact test was used to determine the association between SHCs and sociodemographic and clinical variables. The Mann-Whitney U-test was used to determine the associated risk factors for SHCs. Multinomial regression was used to determine the predictors of the frequency of SHCs. A total of 425 records were reviewed, 68.0% of patients were male, and the median (interquartile range) age was 45 (35 - 56) years. The majority (93.7%) of the patients had SHCs, and 78% had ≥2 SHCs. Significant predictors of having &gt;3 SHCs were the duration of SCI (p=0.01), site of injury in the upper (p=0.03) and lower (p=0.01) thoracic spine, being unemployed (p=0.04), and public hospital income classification (H0 = social grant/unemployed, H1 = earning ZAR0 - 70000 per annum single income/ZAR0 - 100000 per annum household income, and Road Accident Fund; p=0.03, p=0.03 and p=0.01, respectively). Secondary health conditions were prevalent among patients with SCI. People with SCI experience multimorbidity that requires multiple management strategies. These findings point to the need for prevention strategies to minimise the occurrence of SHCs.

Marine heatwave challenges solutions to human-wildlife conflict.

Despite the increasing frequency and magnitude of extreme climate events, little is known about how their impacts flow through social and ecological systems or whether management actions can dampen deleterious effects. We examined how the record 2014–2016 Northeast Pacific marine heatwave influenced trade-offs in managing conflict between conservation goals and human activities using a case study on large whale entanglements in the U.S. west coast's most lucrative fishery (the Dungeness crab fishery). We showed that this extreme climate event diminished the power of multiple management strategies to resolve trade-offs between entanglement risk and fishery revenue, transforming near win–win to clear win–lose outcomes (for whales and fishers, respectively). While some actions were more cost-effective than others, there was no silver-bullet strategy to reduce the severity of these trade-offs. Our study highlights how extreme climate events can exacerbate human–wildlife conflict, and emphasizes the need for innovative management and policy interventions that provide ecologically and socially sustainable solutions in an era of rapid environmental change.

The surgical management of intraoperative intracranial internal carotid artery injury in open skull base surgery—a systematic review

Intraoperative internal carotid artery (ICA) injury during open skull base surgery is a catastrophic complication. Multiple techniques and management strategies have been reported for endoscopic skull base surgery; however, the literature on managing this complication in open skull base surgery is limited. To perform a systematic review and give an overview of the different techniques described to manage this complication intraoperatively, a systematic review was conducted in PubMed, Ovid Medline, Ovid Embase and Scopus for literature published until July 2021. Titles and abstracts were screened. Studies meeting prespecified inclusion criteria were reviewed in full. PRISMA guidelines were strictly adhered to. Out of 4492 articles, only 12 articles could be included, reflecting an underreporting of open skull base ICA injuries. Multiple techniques can be used depending on the location and size of the injury as well as the surgeon's experience. Described techniques include the following: a primary repair via a micro-suture or nonpenetrating clips; wrapping or plugging; coating; occlusion of the parent artery with or without a bypass; packing with further endovascular management. A treatment algorithm is proposed.

Dealing with floppy iris syndrome.

The aim of this study was to review and summarize recent findings and advancements regarding intraoperative floppy iris syndrome (IFIS). Although many improvements have been made for the management of IFIS, it remains a challenging condition for surgeons. An understanding of the syndrome as well as the multitude of tools to mitigate risk of complication is important for surgeons operating on high-risk patients. A variety of management approaches have been modified and improved or further supported with new data, such as intracameral compounds, intraoperative devices and surgical techniques. An understanding of risk factors is important for the identification of at-risk patients. A variety of approaches can greatly reduce incidence of IFIS complications. Multiple management strategies should be utilized to further reduce risk during these difficult surgeries.

Passenger’s routes planning in stochastic common-lines’ multi-modal transportation network through integrating Genetic Algorithm and Monte Carlo simulation

In the urban transportation network, most passengers choose public transportation to travel. However, bad weather, accidents, traffic jams and other factors lead to uncertainty in transportation network. Besides, transport vehicles running on the same segments of routes and belonging to different modes or routes make the transportation network more complicated. In order to improve the efficiency of passenger’s travel, this paper aim to introducing an approach for optimizing passenger travel routes. This approach takes the travel cost and the number of transfers as constraints to finding the shortest total travel duration of passenger in urban transporta-tion network. The running duration and dwell duration of the vehicles in the network are uncertain, and the vehicles are running according to the timetables. As transportation modes, bus, rail transit and walk are consid-ered. In terms of methodological contribution, this paper combines Genetic Algorithm (GA) and Monte Carlo simulation to deal with optimization problem under stochastic conditions. This paper uses Monte Carlo simula-tion to simulate the running duration and dwell time of vehicles in different scenarios to deal with the uncertainty of the network. The shortest path of passenger’s travel is solved by GA. Two kinds of population management strategies including single population management strategy and multiple population management strategy are designed to guide the solution population evolving process. The two kinds of population management strategies of GA are tested in numerical example. The satisfactory convergence performance and efficiency of the model and algorithm is verified by the numerical example. The numerical example also demonstrated that the multiple population management strategy of GA can get better results in a shorter CPU time. At the same time, the influ-ences of some significant variables on solution are performed. This paper is able to provide a scientific quantita-tive support to the path scheme selection under the influence of common-lines and timetables of different modes of transportation in stochastic urban multimodal transportation network.