Parallel Routes Research Articles

Boronolipids

AbstractThe interactions between boron and polyols significantly impact the functioning of bioactive metabolites, algae, plant growth, and quorum determination in certain bacterial species. This wide array of boron‐inclusive compounds aligns with the expectation as boron ranks among the top ten most plentiful elements in seawater. Moreover, carbohydrates, largely comprising polyols, represent the most abundant class of biomass on earth. Lately, the complexes formed between boron and sugars have garnered interest. They have been employed to construct synthetic carbohydrate receptors. These complexes are typified by covalent interactions, enabling their conversion into aqueous solutions. The physical and chemical traits of boron and its established compounds suggest the feasibility of generating boron‐based lipids and glycolipids. Building upon the chemical and mathematical models that demonstrate the formation of protomembranes and biological membranes from complex lipids using low molecular weight polyols as their framework, it appears that the abiotic synthesis of boronolipids follows a parallel route. This review offers a succinct overview of naturally occurring boron compounds and delves into the possible existence of boronolipids within the makeup of protomembranes and biological membranes.

Effects of Size and Mechanical Pre-Treatment on Aluminium Recovery from Municipal Solid Waste Incineration Bottom Ash

Municipal solid waste (MSW) is incinerated to reduce the volume and recover energy and materials. The generation of MSW has been increasing over the past few decades due to the increase in population and changing consumption habits. Rising environmental and economic concerns have increased the importance of waste treatment and recovery. Currently, MSW may take three alternate or parallel routes: direct recycling, incineration, or landfill, depending on the country and location. MSW incineration has three products in addition to energy: bottom ash, fly ash, and off-gas. After incineration, bottom ash usually still contains many materials to be recovered, such as glass, ceramics, and metals with a degree of oxidation. This study focuses on aluminium recovery from MSW incineration bottom ash from two different countries. The 2–30 mm fraction of aluminium particles was characterized in terms of its size, shape, and oxide thickness, and its effects on aluminium recovery were investigated. In addition, the ability of mechanical pre-treatment to remove oxides prior to melting was studied. The results were compared with the analytical modeling developed in this study. An increasing particle size and surface area resulted in an increase in aluminium recovery. Mechanical pre-treatment increased the yield for smaller particles to a larger extent than larger particles due to the difference in the oxide/metal ratio.

Оценка предложений по формированию сети альтернативных маршрутов следования коридора «Север — Юг»

Purpose: to develop proposals for the development of the expected growth in traffic volumes along the North–South transport corridor. To assess the capacity of the Upper Baskunchak — Astrakhan — Olya port section as the most heavily loaded, where cargo flows from several directions merge. To show the need to unload the main direction of the North-South corridor and form a network of alternative routes in the transport corridor to ensure transportation guarantees in case of force majeure. Consider the possibility of attracting parallel routes through the North Caucasus Railway (SKZHD). Methods: the calculation of throughput was carried out using the methodology used in JSC “Russian Railways” and the author’s proposals, taking into account additional reserves of throughput. General logical methods were used — quantitative and qualitative analysis and synthesis, induction and deduction, analogies, classifications, a combination of historical and logical analyses. The proposed universal algorithm, which makes it possible to evaluate the possibility of choosing parallel moves, can be recommended for practical use. Results: the maximum number of trains that can be redirected to parallel routes has been established, taking into account the available capacity and their workload with export cargo traffic in the direction of the ports of the Azov-Black Sea basin. The relevance of the direction of development of heavy traffic aimed at reducing the required capacity and reducing inter-train intervals to increase the available capacity is shown. A universal algorithm has been formed that allows evaluating the possibility of choosing parallel moves. Practical significance: the necessity of mastering the expected cargo flow and preventing its departure to competing destinations, for example, through the Suez Canal, is shown. In the current political and economic conditions, the North — South International Transport Corridor (ITC) is changing its status: from an alternative to the Suez Canal, it is becoming one of the priority routes for Russian export cargo traffic.

Global path planning for inland vessels based on fast marching algorithm

Ship path planning is essential for enhancing navigation safety, shipping efficiency, cost savings and autonomy. This paper presents a path planning algorithm specifically designed for inland vessels, exemplified on the Western Scheldt waterway area from Hansweert to Bath in the Netherlands (known as the area of Schaar van Valkenisse). The algorithm utilizes the fast marching (FM) method to generate safe and cost-efficient paths for both autonomous and conventional navigation, considering factors such as water depth, distance to waterway borders, preferential navigation zones (e.g. starboard side and parallel routes), ship dimensions, and manoeuvring characteristics.The fast marching algorithm uses starting points and a velocity grid, generated based on the aforementioned factors, to produce an arrival time map. The velocity here represents preferences for deeper water, and wider and starboard navigation zones. Subsequently, a gradient descent algorithm is applied to determine the fastest route from the destination to the starting point on the arrival time map. To ensure the route is navigable, the optimal path is updated to a Dubins path that satisfies the ships’ dynamic constraints by using a so-called Dubins model filter.Case studies with various navigation scenarios demonstrate that the path planning tool can provide expected results with tunable parameters allowing for customized preferences. This work can further assist in predicting paths for a traffic study, designing fairways, aids to navigation and can possibly serve as an operational tool to assess the accessibility of a (alternative) fairway.

GPU-accelerated parallel all-pair shortest path routing within stochastic road networks

All-pair shortest path routing within stochastic road networks is often more complicated and computationally challenging than routing in deterministic networks because uncertainties in travel time are introduced. We develop and test a GPU-enabled approach to resolve this computational challenge. This approach is based on a simulation framework that includes four steps: simulation of road networks impedances, computation of candidate paths using an all-pair shortest path algorithm, travel time estimation across candidate paths, and all-pair optimal path calculations. We developed GPU algorithms to accelerate the second and third steps, which are computationally demanding for large road networks. We used the road network of Wuhan, China as a case study. Our experiments indicate that the GPU approach leads to thousands of times in improvement of acceleration, which makes all-pair shortest path routing within stochastic road networks computationally feasible.

Critical Factors Affecting the Selective Transformation of 5-Hydroxymethylfurfural to 3-Hydroxymethylcyclopentanone Over Ni Catalysts.

The ring-rearrangement of 5-hydroxymethylfurfural (HMF) to 3-hydroxymethylcyclopentanone (HCPN) was investigated over Ni catalysts supported on different carbon supports and metallic oxides with different structure and acid-base properties. Their catalytic performance was tested in a batch stirred reactor in aqueous solution at 180 °C and 30 bar of H2. Under these conditions, the HMF hydrogenation proceeds through three possible competitive routes: (i) a non-water path leading to the total hydrogenation product, 2,5-di-hydroxymethyl-tetrahydrofuran (DHMTHF), and two parallel acid-catalyzed water-mediated routes responsible for (ii) ring-opening and (iii) ring-rearrangement reaction products. All catalyst systems primarily produced HCPN, but reaction rates and product distribution were influenced by several variables, some of them intensely analyzed in this work. The most proper conditions resulted to be the presence of the medium/strong Lewis's acidity of a Ni/ZrO2 catalyst (initial TOF=5.99 min-1 and 73 % HCPN selectivity) or the Brønsted acidity originated by an oxidized high surface area graphite, Ni/HSAG-ox (initial TOF=5.92 min-1 and 87 % HCPN selectivity). However, too high density of acidic sites on the catalyst support (Ni/Al2O3) and sulfur impurities from the HMF feedstock led to catalyst deactivation by coke deposition and Ni poisoning, respectively.

Analyzing the Impact of Montreal’s Réseau Express Vélo (REV) on Surrounding Bike Lanes’ Ridership and the COVID-19 Cycling Recovery

Amidst the COVID-19 pandemic, Montreal implemented pro-cycling measures and enhanced its cycling infrastructure, notably by the introduction of the Réseau Express Vélo (REV), an extensive network of separated high-capacity bike lanes inaugurated in 2020. This paper delves into the pandemic’s impact on Montreal’s cycling network, with specific focus on the Berri/Lajeunesse/Saint-Denis REV route, evaluating its influence on the recovery of adjacent bike lanes and its effectiveness in attracting new cyclists. Using data from sensors installed along Montreal’s bike lanes between 2018 and 2023, our analysis reveals an initial average 28% decline in cycling volumes at the onset of the pandemic. However, from 2021 onwards, disparities began to emerge. While sensors on adjacent parallel bike routes to REV recorded further declines in ridership, those elsewhere in the city showed signs of cycling recovery, suggesting a shift in the cycling patterns towards the REV. Distinguishing between cyclists displaced from other parallel bike lanes and those representing a pent-up demand, our study indicates that the displaced cyclists accounted for 64% of the REV’s ridership at the southernmost sensors and only 7% at the northernmost sensors in 2023. These findings have significant policy implications, as cyclists comprised within the pent-up demand category correspond to those having transitioned from not using bike lanes to utilizing safer cycling infrastructure and account for the net growth in the cycling mode share directly attributable to the REV. Both of these observations are pivotal in fostering a shift away from cars and steering Montreal towards achieving its cycling mode share goal of 15% by 2027.

Phenylphenalenones and Linear Diarylheptanoid Derivatives Are Biosynthesized via Parallel Routes in Musella lasiocarpa, the Chinese Dwarf Banana.

Here, we use transcriptomic data from seeds of Musella lasiocarpa to identify five enzymes involved in the formation of dihydrocurcuminoids. Characterization of the substrate specificities of the enzymes reveals two distinct dihydrocurcuminoid pathways leading to phenylphenalenones and linear diarylheptanoid derivatives, the major seed metabolites. Furthermore, we demonstrate the stepwise conversion of dihydrobisdemethoxycurcumin to the phenylphenalenone 4'-hydroxylachnanthocarpone by feeding intermediates to M. lasiocarpa root protein extract.

Functional characterization of polyphenol oxidase OfPPO2 supports its involvement in parallel biosynthetic pathways of acteoside.

Acteoside is a bioactive phenylethanoid glycoside widely distributed throughout the plant kingdom. Because of its two catechol moieties, acteoside displays a variety of beneficial activities. The biosynthetic pathway of acteoside has been largely elucidated, but the assembly logic of two catechol moieties in acteoside remains unclear. Here, we identified a novel polyphenol oxidase OfPPO2 from Osmanthus fragrans, which could hydroxylate various monophenolic substrates, including tyrosine, tyrosol, tyramine, 4-hydroxyphenylacetaldehyde, salidroside, and osmanthuside A, leading to the formation of corresponding catechol-containing intermediates for acteoside biosynthesis. OfPPO2 could also convert osmanthuside B into acteoside, creating catechol moieties directly via post-modification of the acteoside skeleton. The reverse transcription-quantitative polymerase chain reaction (RT-qPCR) analysis and subcellular localization assay further support the involvement of OfPPO2 in acteoside biosynthesis in planta. These findings suggest that the biosynthesis of acteoside in O. fragrans may follow "parallel routes" rather than the conventionally considered linear route. In support of this hypothesis, the glycosyltransferase OfUGT and the acyltransferase OfAT could direct the flux of diphenolic intermediates generated by OfPPO2 into acteoside. Significantly, OfPPO2 and its orthologs constitute a functionally conserved enzyme family that evolved independently from other known biosynthetic enzymes of acteoside, implying that the substrate promiscuity of this PPO family may offer acteoside-producing plants alternative ways to synthesize acteoside. Overall, this work expands our understanding of parallel pathways plants may employ to efficiently synthesize acteoside, a strategy that may contribute to plants' adaptation to environmental challenges.

Network Coding with Parallel Path Protection for Multiple Link Failure in WOBAN

Background: WOBAN is a high-speed network and hence any kind of failure results in huge data loss. Using the proposed network coding technique with parallel path protection can handle multiple link failures, the performance of the network can be improved. Aims: This study aims to improve network performance using network coding with parallel path protection routing algorithm (NC-PPR) for multiple link failures in WOBAN. Objective: We investigated the multiple link failures in WOBAN by the proposed approach namely Coded Path Protection Algorithm, which enhances the survivability of the WOBAN against multiple link failures in the front end and eliminates the need of backup resources. Methods: Extensive simulation is carried out to implement proposed work. A simulation model and code is developed in MATLAB to get the performance enhancement of WOBAN. Results: We compared the performance of proposed algorithm with existing algorithm. The obtained results show that the proposed algorithm has superior performance than the existing algorithm. Conclusion: In this paper, a new routing approach, which works in three phases namely path finding, encoding, and decoding, using random linear network coding (RLNC) is introduced to address the survivability issue of the WOBAN. The proposed approach also enhances the network performance in terms of PDR, overhead, and delay.

Exploring conceptualisations of vocational education in China: how the hierarchical education system mirrors social hierarchy

This research examines conceptualisations of Chinese vocational education. The parallel routes of academic and vocational education sort students into either strand with standardised exams. However, the status of academic and vocational work has been established through a culture of Confucianism. In order to examine current conceptualisations of vocational education, website-based commenting was used as an e-research method. Postings on the Chinese internet community Zhihu (知乎) were analysed for word frequency and user voice and examined through the lens of vocational system classification theory. It was found that Chinese socio-historical perspectives inform societal perceptions of education; that social divides reinforce academic/vocational educational divides, and that the stratified educational system of China further contributes to vocational education’s unsatisfying learning environment. Since addressing societal perspectives is particularly complicated, it is recommended that those who seek to reduce educational inequality work to improve the educational quality and student experience of vocational education.

A strong direct link from the layer 3/4 border to layer 6 of cat primary visual cortex

The cat primary visual cortex (V1) is a cortical area for which we have one of the most detailed estimates of the connection ‘weights’ (expressed as number of synapses) between different neural populations in different layers (Binzegger et al in J Neurosci 24:8441–8453, 2004). Nevertheless, the majority of excitatory input sources to layer 6, the deepest layer in a local translaminar excitatory feedforward loop, was not accounted for by the known neuron types used to generate the quantitative Binzegger diagram. We aimed to fill this gap by using a retrograde tracer that would label neural cell bodies in and outside V1 that directly connect to layer 6 of V1. We found that more than 80% of labeled neurons projecting to layer 6 were within V1 itself. Our data indicate that a substantial fraction of the missing input is provided by a previously unidentified population of layer 3/4 border neurons, laterally distributed and connecting more strongly to layer 6 than the typical superficial layer pyramidal neurons considered by Binzegger et al. (Binzegger et al in J Neurosci 24:8441–8453, 2004). This layer 3/4 to layer 6 connection may be a parallel route to the layer 3 – layer 5 – layer 6 feedforward pathway, be associated with the fast-conducting, movement-related Y pathway and provide convergent input from distant (5–10 degrees) regions of the visual field.

Meso-Halogenated nitrosylcobalamins: Formation and aerobic stability

Here, we report the results of the investigation of reactions between brominated and chlorinated at the C10 position of corrin cyano- (CNCbl-Hal, Hal = Br, Cl) and aquacobalamins (H2OCbl-Hal) and Angeli’s salt (AS). The reactions involving H2OCbl-Hal and AS proceed via two parallel routes, i.e., reactions between H2OCbl-Hal or HOCbl-Hal and HNO generated upon decomposition of AS and between H2OCbl-Hal and AS, and generate corresponding nitrosylcobalamins (NOCbl-Hal). In contrast to the process involving unmodified CNCbl, the reactions between CNCbl-Hal and HNO can be used to produce NOCbl-Hal, which can be explained by the labilization of the axial Co(III)-N[Formula: see text] bond upon meso-halogenation facilitating the reaction between HNO and the lower axial position of CNCbl-Hal. We indicated that the process is initiated by the relatively slow formation of CNCbl-Hal species with dissociated 5,6-dimethylbenzimidazole nucleotide and further rapid binding of HNO by Co(III) ion. Produced NOCbl-Hal reacts with dioxygen significantly slower than unmodified NOCbl and can be recommended for further investigation of their biological and medicinal properties.

Latency-Sensitive Parallel Multi-Path Service Flow Routing With Segmented VNF Processing in NFV-Enabled Networks

Latency-Sensitive Parallel Multi-Path Service Flow Routing With Segmented VNF Processing in NFV-Enabled Networks

A coupling framework between OpenFAST and WEC-Sim. Part I: Validation and dynamic response analysis of IEA-15-MW-UMaine FOWT

This study proposes a coupling strategy between OpenFAST and WEC-Sim (OWS) to provide a general solution for the design of offshore floating wind turbines (FOWTs). The fully-coupled calculation is implemented by transferring the tower-base loads from OpenFAST to WEC-Sim, which in turn transfers the platform displacements, velocities and accelerations back to the former. The cross-platform data interface is achieved via S-function in Simulink, and a parallel route in OWS ensures a comparable calculation speed compared with OpenFAST. The model validation is conducted based on the IEA-15-MW reference wind turbine (RWT) and UMaine-VolturnUS-S semisubmersible platform with the reference site located at the northern North Sea. Through code-to-code comparisons against OpenFAST, the newly developed OWS model is tested in various environmental conditions to ensure its correctness and reliability. Furthermore, the dynamic responses of the FOWT are comprehensively investigated using spectral analysis. The time lag of the platform displacements with respect to the incident wave is quantitatively evaluated based on correlation analysis. Generally, there is little time lag between the heave displacement and the wave, but the time lag in the pitch direction (6–9 s) is approximately twice that (3–4 s) in the surge direction.

Basement membrane diversification relies on two competitive secretory routes defined by Rab10 and Rab8 and modulated by dystrophin and the exocyst complex.

The basement membrane (BM) is an essential structural element of tissues, and its diversification participates in organ morphogenesis. However, the traffic routes associated with BM formation and the mechanistic modulations explaining its diversification are still poorly understood. Drosophila melanogaster follicular epithelium relies on a BM composed of oriented BM fibrils and a more homogenous matrix. Here, we determined the specific molecular identity and cell exit sites of BM protein secretory routes. First, we found that Rab10 and Rab8 define two parallel routes for BM protein secretion. When both routes were abolished, BM production was fully blocked; however, genetic interactions revealed that these two routes competed. Rab10 promoted lateral and planar-polarized secretion, whereas Rab8 promoted basal secretion, leading to the formation of BM fibrils and homogenous BM, respectively. We also found that the dystrophin-associated protein complex (DAPC) and Rab10 were both present in a planar-polarized tubular compartment containing BM proteins. DAPC was essential for fibril formation and sufficient to reorient secretion towards the Rab10 route. Moreover, we identified a dual function for the exocyst complex in this context. First, the Exo70 subunit directly interacted with dystrophin to limit its planar polarization. Second, the exocyst complex was also required for the Rab8 route. Altogether, these results highlight important mechanistic aspects of BM protein secretion and illustrate how BM diversity can emerge from the spatial control of distinct traffic routes.

Exploring Josephus Interconnection Networks : Unveiling Architecture, Applications, and Recent Advancements

This abstract delves into the distinctive features, applications, challenges, and future directions of Josephus Interconnection Networks. These networks, characterized by a circular topology and deterministic communication paths, present a novel approach to interconnected systems, promising advancements in parallel computing, routing algorithms, and fault tolerance. The recapitulation of key findings highlights ongoing developments in dynamic node management, routing algorithm optimization, and adaptive fault tolerance mechanisms. Implications for interconnected systems encompass efficient parallel processing, rendering Josephus networks apt for distributed and edge computing. The challenges in implementation, notably hardware complexity, underscore the necessity for continual research. Future applications envision roles in distributed computing, edge computing, and potential integration with quantum computing. The abstract concludes by emphasizing the exciting prospects for Josephus networks as they navigate historical inspiration and modern computational challenges in the evolving landscape of interconnected systems.

Remaining Useful Life Prediction Method Based on the Spatiotemporal Graph and GCN Nested Parallel Route Model

Remaining Useful Life Prediction Method Based on the Spatiotemporal Graph and GCN Nested Parallel Route Model

Parallel drone scheduling vehicle routing problems with collective drones

We study last-mile delivery problems where trucks and drones collaborate to deliver goods to final customers. In particular, we focus on problem settings where either a single truck or a fleet with several homogeneous trucks work in parallel to drones, and drones have the capability of collaborating for delivering missions. This cooperative behavior of the drones, which are able to connect to each other and work together for some delivery tasks, enhance their potential, since connected drone has increased lifting capabilities and can fly at higher speed, overcoming the main limitations of the setting where the drones can only work independently.In this work, we contribute a Constraint Programming model and a valid inequality for the version of the problem with one truck, namely the Parallel Drone Scheduling Traveling Salesman Problem with Collective Drones and we introduce for the first time the variant with multiple trucks, called the Parallel Drone Scheduling Vehicle Routing Problem with Collective Drones. For the latter version of the problem, we propose two Constraint Programming models and a Mixed Integer Linear Programming model.An extensive experimental campaign leads to state-of-the-art results for the problem with one truck and some understanding of the presented models’ behavior on the version with multiple trucks. Some insights about future research are finally discussed.

Mechanistic analysis of the electro-reduction of oxygen to water on electrode surfaces partially inhibited by electro-oxidation

A mechanistic model for the oxygen reduction reaction (ORR) on noble-metal electrodes was proposed, which considers the possible inhibition of active sites by electro-oxidation and the electro-reduction of dissolved oxygen to water on non-inhibited sites through the simultaneous occurrence of two parallel routes. Equations for describing steady state ORR polarization curves were derived by solving this mechanism without aprioristic restrictions on rate-determining steps. In this model the electro-oxidation of the metallic surface sites occurs in parallel with the ORR, causing the formation of subsurface oxides that block the active sites capable to adsorb ORR intermediates. For accounting the potential-dependent inhibition, metal electro-oxidation was described through a single-step reaction, assuming Frumkin-type interactions of the oxidized metal sites. On the other hand, reaction-rate equations were derived for the ORR operating through the simultaneous occurrence of two routes, so-called the dissociative (DP) and the associative (AP) pathways, which involve the adsorption of oxygen on the non-inhibited active sites as Oad and OOHad, respectively. An analysis of the effects of elementary kinetic and adsorption parameters allowed to visualize the effects that the electro-oxidation reaction causes, together with the ORR kinetics, on the polarization curves, particularly at low overpotentials. The obtained expressions were used to correlate reported experimental polarization curves measured on polycrystalline Pt microelectrodes in acid and alkaline media. It was verified that the DP is operative at low overpotentials and the current tends to reach a kinetically controlled limiting current just before the AP becomes effective. Additionally, it was concluded that while the ORR performance of Pt could be improved by shifting the electro-oxidation reaction toward more anodic values, it would be more efficient to increase its kinetic capacity for cleaving oxygen as Oad and for reducing its protonated form (OHad) to water.