Journal articles on the topic 'Unlimited lifetime'

Patients suffering from intestinal failure present unique and difficult challenges to the transplant team. Augmenting the need for interdisciplinary teamwork is the higher incidence of death on the intestinal transplant waiting list. Successful management of this population requires an interdisciplinary approach at each stage of care, beginning with evaluation and continuing through discharge and lifetime management. A close relationship between patients, their caregivers, and all members of the transplant team is an essential component to successful lifetime management. Open communication between team members and unlimited accessibility to each other enables work flow to be managed efficiently, and enables the provision of optimal care. In this article, we describe the functions of the nonphysician clinical personnel needed to manage the intestinal transplant patient—beginning at the evaluation through lifetime follow-up care. The goal of each professional is the same: to restore the patient to the best quality of life possible.

Pneumatic linear peristaltic actuators can offer some potential advantages when compared with conventional ones. The low cost, virtually unlimited stroke and easy implementation of curved motion profiles are among those benefits. On the downside, these actuators suffer high mechanical stress that can lead to short service life and increased leakage among chambers during the actuator lifetime. One way to cope with this problem is to impose the force—instead of the displacement—between rollers, as this has been shown to improve the endurance of the hose while reducing leakage during the actuator lifetime. This paper presents closed control loop results using such a setup. Previous studies with linear peristaltic actuators have revealed that, although it is possible to reach zero steady state error to constant references with closed loop control, the dynamic response obtained is very slow. This paper is mainly focused on this topic, namely on the development of several control laws to improve the dynamic performance of the system while avoiding limit cycles. The new developed control law leads to an average time of 1.67 s to reach a 0.1 mm error band in an experiment consisting of a series of 16 steps ranging from 0.02 to 0.32 m in amplitude.

The energy limitation of wireless sensors limits the lifetime of the traditional wireless sensor networks. The <b>Battery-Free Sensor Network (BF-WSN)</b> is a new network architecture proposed in recent years to address the limitation of wireless sensor networks. In a BF-WSN, the battery-free node can harvest energy from the ambient environment, and thus the lifetime of a BF-WSN is unlimited in terms of energy. The coverage quality is an important measurement of BF-WSNs. Considering the specific features of BF-WSNs, we propose a new deployment concept for BF-WSNs, named <i>Joint Deployment</i>. It aims to determine the locations and working schedules of sensor nodes to maximize network coverage quality. Based on the joint deployment concept, we propose a new deployment problem of battery-free sensor nodes. We prove that this problem is at least NP-Hard. We also analyze the upper bound of this problem. Furthermore, we propose an approximated algorithm to solve this problem and analyze the time complexity and the ratio bound of the algorithm. Extensive simulations are carried out to examine the performance of the proposed algorithm. The simulation results show that the algorithm is efficient and effective.

With the development of wireless sensor networks, many building energy management systems are getting to adopt wireless sensor network as their communication infrastructure. However, the existing wireless sensor network protocols cannot satisfy the energy-saving demand of building energy management systems. Considering the characteristics of the building energy management system wireless sensor networks, a novel energy-efficient routing scheme is proposed called relay participated–new-type building energy management system. Nodes in the building energy management system wireless sensor networks are divided into two types: energy-limited nodes (battery powered) and energy-unlimited nodes (main powered, solar charger, or heat energy powered). Relay participated–new-type building energy management system allows energy-unlimited nodes to temporarily receive packets that are routed to a nearby energy-limited nodes. In this way, time synchronization for low-power sleep at media access control layer is no longer required, which reduces the delay and control overhead at media access control layer dramatically. Relay participated–new-type building energy management system reduces energy usage of energy-limited nodes and extend the lifetime of wireless sensor networks in new-type building energy management systems. Simulation results show that the relay participated–new-type building energy management system protocol significantly improves energy efficiency of limited energy nodes and reduces latency as compared to ad hoc on-demand distance vector–sensor medium access control and low-energy adaptive clustering hierarchy.

RFID is a rapidly developing technology of wireless communication and identification mostly used in supply chain systems, logistic and access control. Nowadays attempts to transfer this technology to other applications are carried out. This paper presents review of global researches performed last years, on application of RFID technology to tasks connected with wireless passive sensing in Structural Health Monitoring, with additional overview of works conducted in this subject by the authors. Sensors based on this technology require neither battery nor wire. It could be interrogated from distance, its lifetime is almost unlimited. Investigations, focused both on using RFID transponder as a sensing element, as well as, using antenna as a energy harvesting part that could power the sensor circuit, are mentioned. Performed studies show, that despite problems connected with using high frequencies, described wireless sensors should be useful for SHM tasks.

Congestion control is one of the key research topics in relation to the routing algorithms of wireless sensor networks (WSNs). In this paper, we propose a congestion-aware routing algorithm (CARA) for unlimited-lifetime wireless sensor networks by integrating the geographic distance and traffic load of sensor nodes. The algorithm takes alleviating congestion as the primary purpose and considers the traffic of the node itself and local network traffic. According to the geographic distance between nodes, CARA defines four decision parameters (node load factor, forward rate, cache remaining rate, and forward average cache remaining rate), selecting the best node as the next-hop through the multi-attribute decision-making method. Compared with the two existing algorithms for congestion control, our simulation results suggest that the CARA algorithm alleviates network congestion and meets reasonable network delay and energy consumption requirements.

Source-free equations of nonlinear electrodynamics minimally coupled to gravity admit regular axially symmetric asymptotically Kerr-Newman solutions which describe charged rotating black holes and electromagnetic spinning solitons (lumps). Asymptotic analysis of solutions shows, for both black holes and solitons, the existence of de Sitter vacuum interior which has the properties of a perfect conductor and ideal diamagnetic and displays superconducting behaviour which can be responsible for practically unlimited lifetime of the electron. Superconducting current flows on the equatorial ring replacing the Kerr ring singularity of the Kerr-Newman geometry. Interior de Sitter vacuum supplies the electron with the finite positive electromagnetic mass related to the interior de Sitter vacuum of the electroweak scale and to breaking of space-time symmetry, which allows explaining the mass-square differences for neutrino and the appearance of the minimal length scale in the annihilation reaction e+e-→γγ(γ).

Mesenchymal stem cells constitute a pool of cells present throughout the lifetime in numerous niches, characteristic of unlimited replication potential and the ability to differentiate into mature cells of mesodermal tissues in vitro. The therapeutic potential of these cells is, however, primarily associated with their capabilities of inhibiting inflammation and initiating tissue regeneration. Owing to these properties, mesenchymal stem cells (derived from the bone marrow, subcutaneous adipose tissue, and increasingly urine) are the subject of research in the settings of kidney diseases in which inflammation plays the key role. The most advanced studies, with the first clinical trials, apply to ischemic acute kidney injury, renal transplantation, lupus and diabetic nephropathies, in which beneficial clinical effects of cells themselves, as well as their culture medium, were observed. The study findings imply that mesenchymal stem cells act predominantly through secreted factors, including, above all, microRNAs contained within extracellular vesicles. Research over the coming years will focus on this secretome as a possible therapeutic agent void of the potential carcinogenicity of the cells.

In a Wireless sensor network, network lifetime plays a vital role, wherein regular communication and sensor nodes are positioned at different points. Nodes energy depletion may lead to communication interruption due to unlimited data flow from one point to another; for adequate communication, Nodes energy should be maximized by arranging cutting-edge techniques such as adaptive buffer switching and congestion control significant role. When the incoming data is more wide-ranging than available resources, a congestion situation arises. It results in energy consumption, loss of packets, buffer overflow, and raises end-to-end delay. In this paper, adaptive buffer switching and Congestion Control management are done effectively. Simultaneously, congestion detects based on residual energy, residual buffer space, and sensor nodes conviction level. This methodology shows based on the evaluation of cost, which selects main and spare buffers adaptively. Dynamic buffer switching and swapping are used to enhance the outcome of congestion. Result of the ABETCC approach is compared with the protocol like TCEER and TFCC compared to the data loss ratio and energy consumption

Abstract Closely related species in nature usually exhibit very similar phylogenetically conserved traits, such as reproduction, behavior and development. Here, we compared fecundity schedules, lifetime reproductive success and offspring sex ratios in three congeneric facultative hyperparasitoid wasps that exhibit several overlapping traits and which co-occur in the same small-scale habitats. Gelis agilis, G. proximus and G. hortensis are abundant in meadows and forest edge habitats in the Netherlands. Gelis agilis is asexual (all female), whereas the other two species reproduce sexually. Here they developed on cocoons of the primary parasitoid Cotesia glomerata. When provided with unlimited hosts, lifetime reproductive success was three times higher in G. proximus than in G. agilis with G. hortensis producing intermediate numbers of offspring. All three species depleted their teneral reserves during their lives. Females of G. proximus and G. hortensis lived significantly longer than females of G. agilis. Offspring sex ratios in young G. proximus mothers were female-biased and marginally male-biased in G. hortensis. As mothers aged, however, the ratio of male:female progeny produced rapidly increased until no daughters emerged later in life. Our results reveal significant differences in reproductive traits among the three species despite them co-occurring in the same microhabitats, being very closely related and morphologically similar. The increase in the production of male progeny by Gelis mothers over time suggests a depletion in sperm number or viability with age. This is especially interesting, given that Gelis species are among the least fecund parasitoids thus far studied. It is likely that in the field most Gelis mothers are probably only able to parasitize a few hosts and to maintain the production of female offspring.

Pneumatic linear peristaltic actuators can offer some potential advantages when compared with conventional ones. Low cost, virtually unlimited stroke and easy implementation of curved motion profiles are among those benefits. On the downside, these actuators suffer high mechanical stress, which leads to short endurance and increased leakage between chambers during the actuator lifetime. This paper contributes to this field by experimentally characterizing the life behavior of a prototype of a linear pneumatic peristaltic actuator where force—instead of displacement—between rollers is imposed. It is shown that the use of an imposed force configuration has a significant impact in the actuator life time. In fact, the proposed actuator configuration has an average endurance of up to 250% higher than the one previously presented in the literature. This result was obtained while maintaining almost zero leakage between chambers, despite the hose wear throughout the service life. Finally, this paper explores the use of different hose geometries to increase the actuator life span. To this end, a preliminary study is presented where two different 3D printed hose cross sections are tested and compared with a circular one.

Features of reservoirs use make it necessary to collect, analyse and synthesise environmental information about the state of hydroecosystems with a purpose of their development forecast. Overgrowing processes are an important indicator of ecosystem. The following paper contains the results of the study of Chernovskoe reservoir flora and vegetation in different years. Floristic diversity is compared with other reservoirs and hydro botanic information about them has already been published in a number of the authors papers. The comparative analysis has shown that the overall composition of reservoirs flora is random, while there is some regularity in the environmental spectrum - each of them is characterized by a small number of aquatic species and by the dominance of coastal plant species. The study of Chernovskoe reservoir vegetation has shown that the composition of dominants has changed over the past 40 years, from 1974 to 2015. There is a dominance of air water vegetation above the water one, but the borders of the water vegetation growth have widened. Chernovskoe reservoir is currently in dynamic equilibrium. The lifetime of aquatic ecosystem at this stage may be unlimited if there is an unstable hydro regime and impulsive character of water use. The reservoir water level lowering may lead to overgrowth and accelerate activation of waterlogging.

We investigated the accuracy with which subjects can indicate the singular point in a first-order optical flow field. This singular point might be important in navigation and orientation. The stimuli were expanding or rotating sparse random-dot patterns consisting of 80 dark dots on a light background. The stimulus window was circular with a diameter of 20 deg arc. The singular point could be at one of 48 different locations. Subjects had to indicate the location of this singular point with a cursor, while fixating in the centre of the stimulus. Presentation time was unlimited, though each dot had a limited lifetime (114 ms) to avoid density cues. Both veridicality and reproducibility for our subjects increased with increasing values of expansion or rotation in a nonlinear way. We did not find any systematic differences between expansion and rotation. When we blocked either the outer rim or the central part of the stimulus, performance remained the same for singular points that were within the visible part of the stimulus. For singular points outside this visible part, the reproducibility also remained the same, but subjects tended to locate the singular points closer to the rim of the visible part of the stimulus.

Short glass fiber reinforced plastics (SGFRP) offer superior mechanical properties compared to polymers, while still also enabling almost unlimited geometric variations of components at large-scale production. PA6-GF30 represents one of the most used SGFRP for series components, but the impact of injection molding process parameters on the fatigue properties is still insufficiently investigated. In this study, various injection molding parameter configurations were investigated on PA6-GF30. To take the significant frequency dependency into account, tension–tension fatigue tests were performed using multiple amplitude tests, considering surface temperature-adjusted frequency to limit self-heating. The frequency adjustment leads to shorter testing durations as well as up to 20% higher lifetime under fatigue loading. A higher melt temperature and volume flow rate during injection molding lead to an increase of 16% regarding fatigue life. In situ X-ray microtomography analysis revealed that this result was attributed to a stronger fiber alignment with larger fiber lengths in the flow direction. Using digital volume correlation, differences of up to 100% in local strain values at the same stress level for different injection molding process parameters were identified. The results prove that the injection molding parameters have a high influence on the fatigue properties and thus offer a large optimization potential, e.g., with regard to the component design.

Resumen: Resulta innegable la trascendencia del mundo clásico en Estados Unidos durante el periodo anterior a la Guerra de Secesión. La literatura del principado de Augusto tuvo una especial influencia y proporcionó referentes ideológicos que legitimaban tanto la estructura socioeconómica como el modelo político que se proponía para el nuevo estado: una sociedad de base agrícola inspirada en la que cantaban poetas augusteos como Virgilio y una democracia de pequeños propietarios. Sin embargo, el poder ilimitado del emperador y su carácter vitalicio fueron algunos de los motivos por los que la figura de Augusto recibió numerosas críticas y fue rechazada como paradigma de buen gobierno.Palabras clave: Padres fundadores, Augusto, Virgilio, Horacio, Estados Unidos, Imperio romano.Abstract: It is clear the ongoing importance of the classics before the Civil War in the United States and their formative influence upon the Founders. The literature of the Augustan Principate provided one of their principal sets of ideological tools: an agricultural lifestyle, a lifestyle deified by Augustan poets, a society of Virgilian farmers and a democratic republic supported by free landholders. However, Augustus became a code word for tyrant. The Founding Fathers perceived him as an antimodel and he was rejected as a political canon because of the unlimited power and lifetime term of the Roman Emperors.Key words: Founding Fathers, Augustus, Virgil, Horace, United States, Roman Empire.

Electroluminescence (EL) is the emission of light generated from the radiative recombination of electrons and holes electrically injected into a luminescent semiconductor. Conventional EL devices are made of inorganic direct-bandgap semiconductors, such as GaAs and InGaAs. Recently EL devices based on conjugated organic small molecules and polymers have attracted increasing attention due to easy fabrication of large areas, unlimited choice of colors, and mechanical flexibility. Potential applications of these organic/polymeric EL devices include backlights for displays, alphanumeric displays, and high-density information displays.Electroluminescence from an organic material was first demonstrated in the 1960s on anthracene crystals by Pope et al. at New York University. Subsequently several other groups also observed this phenomenon in organic crystals and thin films. These organic EL devices had high operating voltages and low quantum efficiency. Consequently they did not attract much attention. In 1987 a breakthrough was made by Tang and VanSlyke at Eastman Kodak who found that by using multilayers of sublimated organic molecules, the operating voltage of the organic EL devices was dramatically reduced and the quantum efficiency was significantly enhanced. This discovery touched off a flurry of research activity, especially in Japan. The Japanese researchers, as welt as the group at Kodak, have since improved the device efficiency and lifetime to meet commercial requirements. This progress is reviewed by Tsutsui in this issue.

Robots are widely used in modern industrial manufacturing, in households, in the entertainment sector, and in the security sector. In recent times, because of the increasing lifetime for old people, the concept of lifestyles of health and sustainability is prevailing. To facilitate a heavily loaded hand-carrier when aged people are travelling or working outside, an intelligent automated guided vehicle (AGV) is necessary. In this article, an intelligent and interactive AGV is developed. In order to develop the auto-tracking carrier for an AGV within an unlimited working space, a dynamic distance measuring system using the speed variation between a radio wave and an ultrasonic wave propagating in the air is adopted. The microchip PIC 18F452 is used as the control core. To facilitate the targeted functions, interactivity in conjunction with high quality sensors plays an essential role. By using a wireless transmitter (radio ray) and an ultrasonic transmitter on the user's waist angled towards the sensors at the front of the AGV, the distance between the user and the AGV can be calculated. To avoid colliding with a barrier, an ultrasonic transmitter is installed on both sides of the AGV. Subsequently, a controller based on fuzzy thinking will actuate the motor's motion enabling it to follow and dodge barriers. Consequently, a prototype AGV has been manufactured and successfully tested in the laboratory.

In the last decade, energy harvesting wireless sensor network (EHWSN) has been well developed. By harvesting energy from the surrounding environment, sensors in EHWSN remove the energy constraint and have an unlimited lifetime in theory. The long-lasting character makes EHWSN suitable for Industry 4.0 applications that usually need sensors to monitor the machine state and detect errors continuously. Most wireless sensor network protocols have become inefficient in EHWSN due to neglecting the energy harvesting property. In this paper, we propose CPEH, which is a clustering protocol specially designed for the EHWSN. CPEH considers the diversity of the energy harvesting ability among sensors in both cluster formation and intercluster communication. It takes the node’s information such as local energy state, local density, and remote degree into account and uses fuzzy logic to conduct the cluster head selection and cluster size allocation. Meanwhile, the Ant Colony Optimization (ACO) as a reinforcement learning strategy is utilized by CPEH to discover a highly efficient intercluster routing between cluster heads and the base station. Furthermore, to avoid cluster dormancy, CPEH introduces the Cluster Head Relay (CHR) strategy to allow the proper cluster member to undertake the cluster head that is energy depletion. We make a detailed simulation of CPEH with some famous clustering protocols under different network scenarios. The result shows that CPEH can effectively improve the network throughput and delivery ratio than others as well as successfully solve the cluster dormancy problem.

This work demonstrates an open-source hardware and software platform for monitoring the performance of buildings, called Elemental, that is designed to provide data on indoor environmental quality, energy usage, HVAC operation, and other factors to its users. It combines: (i) custom printed circuit boards (PCBs) with RFM69 frequency shift keying (FSK) radio frequency (RF) transceivers for wireless sensors, control nodes, and USB gateway, (ii) a Raspberry Pi 3B with custom firmware acting as either a centralized or distributed backhaul, and (iii) a custom dockerized application for the backend called Brood that serves as the director software managing message brokering via Message Queuing Telemetry Transport (MQTT) protocol using VerneMQ, database storage using InfluxDB, and data visualization using Grafana. The platform is built around the idea of a private, secure, and open technology for the built environment. Among its many applications, the platform allows occupants to investigate anomalies in energy usage, environmental quality, and thermal performance via a comprehensive dashboard with rich querying capabilities. It also includes multiple frontends to view and analyze building activity data, which can be used directly in building controls or to provide recommendations on how to increase operational efficiency or improve operating conditions. Here, we demonstrate three distinct applications of the Elemental platform, including: (1) deployment in a research lab for long-term data collection and automated analysis, (2) use as a full-home energy and environmental monitoring solution, and (3) fault and anomaly detection and diagnostics of individual building systems at the zone-level. Through these applications we demonstrate that the platform allows easy and virtually unlimited datalogging, monitoring, and analysis of real-time sensor data with low setup costs. Low-power sensor nodes placed in abundance in a building can also provide precise and immediate fault-detection, allowing for tuning equipment for more efficient operation and faster maintenance during the lifetime of the building.

In the modern world, the problem of providing the population with high-quality food products is reaching a critical point due to the increase in the population of the planet, mediated by an influence on the growth of food consumption; globalization processes, thereby contributing to fundamental changes in the structure and patterns of nutrition i.e., insufficiently effective principles of agricultural raw materials processing, etc. Today, food independence is a strategic component of a country&apos;s security, which is enshrined in a number of regulatory documents, including: the Doctrine of Food Security of the Russian Federation; the Strategy for Scientific and Technological Development of the Russian Federation; the Strategy for Improving the Quality of Food Products in the Russian Federation until 2030; and, others. The stated goals are: updating the priority tasks of group and individual products identification, including on biological and geographical features; unification of evaluation criteria and objective principles for expanding their field; traditional technologies transformation, the potential of which doesn&apos;t have the possibility of unlimited replication, etc. It is predicted that the growth of production volumes, processes and consumption systems optimization will be based on the application of a number of basic principles: “lifetime” formation of raw materials composition and properties; development of highly efficient production technologies and deep processing of agricultural products; implementation of algorithms for structuring logistics, storage and processing/disposal of food and waste; increasing energy efficiency of production processes, etc. At the same time, the strategic vectors of technology development are specialized and personalized nutrition, cross-border cooperation, food quality and safety, minimization of negative environmental impact, traceability of the food chain “from field to consumer,” etc. A priori, to achieve all this it will require the introduction of widespread modern technologies, including digital ones, as well as the modernization of traditional and the creation of new methodological and process decisions.

The article substantiates the assertion that the global crisis, the nature of which differs from the crises that society has already experienced in its lifetime, is associated with a drop in demand and consumption, so modern financial structures will take a long time to get out of it. The purpose of the article is to conduct a structural analysis and characterize the uniqueness of the modern financial crisis, to display the features and causes of its occurrence. The object of research is the nature of the emergence, formation and course of the modern financial crisis, the consequences of which will accompany both business structures and the private life of citizens for a very long time. Research hypothesis. Contrary to popular belief, the coronavirus pandemic is not the fundamental cause of the current crisis. The crisis has nothing to do with COVID-19. This crisis has been coming for years, relentlessly and unhurriedly. The pandemic only whipped it up, made it more obvious. Presentation of the main material. The nature of the current crisis is different from the nature of its predecessors: Black Monday in the United States in 1989, the dot-com crisis in the 2000s, and the US subprime crisis in 2008, when the economy was recovering relatively quickly. These crises were “financial” bubbles, the deflation of which led to a sharp slowdown in the economy. But the exit from them was relatively quick, 1-1.5 years. Everyone knows that the physical stock of US gold is limited to the amount held at the New York Fed Bank and at Fort Knox. Therefore, you cannot "print" as many US dollars as you want. However, R. Nixon removed this restriction. The Fed was then able to print unlimited dollars. Originality and practical significance of the research. The Fed can no longer stimulate consumer demand through the mechanism of lowering interest rates. This means that there will be no demand in the future. And if there is no demand, then again there is a crisis of overproduction, the economy slows down and enters a recession. Conclusions. The current crisis will drag on for a long time, moreover, it will be accompanied by the protection of their own economies by different countries, protectionism and the formation of zones of their own consumption within their countries. And these processes are already beginning to come true. Examples are the duties imposed by D. Trump, Britain's withdrawal from the "Euro zone" and the formation of settlements between countries through the mechanisms of national currencies.

Abstract. We present a novel kinetic multi-layer model that explicitly resolves mass transport and chemical reaction at the surface and in the bulk of aerosol particles (KM-SUB). The model is based on the PRA framework of gas-particle interactions (Pöschl et al., 2007), and it includes reversible adsorption, surface reactions and surface-bulk exchange as well as bulk diffusion and reaction. Unlike earlier models, KM-SUB does not require simplifying assumptions about steady-state conditions and radial mixing. The temporal evolution and concentration profiles of volatile and non-volatile species at the gas-particle interface and in the particle bulk can be modeled along with surface concentrations and gas uptake coefficients. In this study we explore and exemplify the effects of bulk diffusion on the rate of reactive gas uptake for a simple reference system, the ozonolysis of oleic acid particles, in comparison to experimental data and earlier model studies. We demonstrate how KM-SUB can be used to interpret and analyze experimental data from laboratory studies, and how the results can be extrapolated to atmospheric conditions. In particular, we show how interfacial transport and bulk transport, i.e., surface accommodation, bulk accommodation and bulk diffusion, influence the kinetics of the chemical reaction. Sensitivity studies suggest that in fine air particulate matter oleic acid and compounds with similar reactivity against ozone (C=C double bonds) can reach chemical lifetimes of multiple hours only if they are embedded in a (semi-)solid matrix with very low diffusion coefficients (≤10−10 cm2 s−1). Depending on the complexity of the investigated system, unlimited numbers of volatile and non-volatile species and chemical reactions can be flexibly added and treated with KM-SUB. We propose and intend to pursue the application of KM-SUB as a basis for the development of a detailed master mechanism of aerosol chemistry as well as for the derivation of simplified but realistic parameterizations for large-scale atmospheric and climate models.

Abstract. We present a novel kinetic multi-layer model that explicitly resolves mass transport and chemical reaction at the surface and in the bulk of aerosol particles (KM-SUB). The model is based on the PRA framework of gas-particle interactions (Pöschl-Rudich-Ammann, 2007), and it includes reversible adsorption, surface reactions and surface-bulk exchange as well as bulk diffusion and reaction. Unlike earlier models, KM-SUB does not require simplifying assumptions about steady-state conditions and radial mixing. The temporal evolution and concentration profiles of volatile and non-volatile species at the gas-particle interface and in the particle bulk can be modeled along with surface concentrations and gas uptake coefficients. In this study we explore and exemplify the effects of bulk diffusion on the rate of reactive gas uptake for a simple reference system, the ozonolysis of oleic acid particles, in comparison to experimental data and earlier model studies. We demonstrate how KM-SUB can be used to interpret and analyze experimental data from laboratory studies, and how the results can be extrapolated to atmospheric conditions. In particular, we show how interfacial and bulk transport, i.e., surface accommodation, bulk accommodation and bulk diffusion, influence the kinetics of the chemical reaction. Sensitivity studies suggest that in fine air particulate matter oleic acid and compounds with similar reactivity against ozone (carbon-carbon double bonds) can reach chemical lifetimes of many hours only if they are embedded in a (semi-)solid matrix with very low diffusion coefficients (≤10−10 cm2 s−1). Depending on the complexity of the investigated system, unlimited numbers of volatile and non-volatile species and chemical reactions can be flexibly added and treated with KM-SUB. We propose and intend to pursue the application of KM-SUB as a basis for the development of a detailed master mechanism of aerosol chemistry as well as for the derivation of simplified but realistic parameterizations for large-scale atmospheric and climate models.

In modern era, with technologies shifting from wired to wireless technologies, Wireless Sensor Networks (WSNs) play an essential role in advancement of technology. WSNs have limited battery .In this paper, we propose Improved Multiple Gateway Node (MGN) based Routing Architecture (IMRA) that increases both network lifetime and stability period of the network and also improves energy efficiency. It uses the technique of load balancing and considers average energy of the network to improve aforementioned parameters. IMRA is event-driven protocol and has four MGNs with unlimited power which makes this protocol efficient for use in disaster prone areas like earthquakes, forest fires etc. saving millions of lives. Wireless Sensor Networks (WSNs) play an essential role in advancement of technology. Various disasters like earthquakes, forest fires, etc. can be sensed in advance using latest technology in WSNs and preventive measures can be taken. IMRA surpasses other protocols by increasing Stability Period, Half Node Dead and Network lifetime by 58.18%, 55.94% and 52.96% respectively as compared to traditional MRA and by 156.99%, 86.2% and 90.12% respectively as compared to Threshold sensitive Energy Efficient Delay aware Routing Protocol(TEDRP).

AbstractMiniaturized or microscale generators that can effectively convert weak and random mechanical energy into electricity have significant potential to provide solutions for the power supply problem of distributed devices. However, owing to the common occurrence of friction and wear, all such generators developed so far have failed to simultaneously achieve sufficiently high current density and sufficiently long lifetime, which are crucial for real-world applications. To address this issue, we invent a microscale Schottky superlubric generator (S-SLG), such that the sliding contact between microsized graphite flakes and n-type silicon is in a structural superlubric state (an ultra-low friction and wearless state). The S-SLG not only generates high current (~210 Am−2) and power (~7 Wm−2) densities, but also achieves a long lifetime of at least 5,000 cycles, while maintaining stable high electrical current density (~119 Am−2). No current decay and wear are observed during the experiment, indicating that the actual persistence of the S-SLG is enduring or virtually unlimited. By excluding the mechanism of friction-induced excitation in the S-SLG, we further demonstrate an electronic drift process during relative sliding using a quasi-static semiconductor finite element simulation. Our work may guide and accelerate the future use of S-SLGs in real-world applications.

Industry4.0 is a popular topic in today's ecosystem. Many businesses that have high profitability, sustainable unlimited lifetime and high efficiency will be able to integrate Industry 4.0 technologies, which emerged in Germany in 2011, into their businesses and meet changing customer demands. On the other hand, they will be able to gain competitive advantage with this new technology. The concept is defined as a process in which an advanced level of automation is applied over a virtual network, the machines make decisions by communicating with each other, the data collected with the help of sensors are stored in the cloud system through these virtual networks, and used by all stakeholders integrated into the system when needed. In this study, it is aimed to explain what the Industry 4.0 technologies conceptualized in 2011, the concept of smart production and the benefits of these technologies to businesses.

AbstractThis paper deals with a retrial queuing system with a finite number of sources and collision of the customers, where the server is subject to random breakdowns and repairs depending on whether it is idle or busy. A significant difference of this system from the previous ones is that the service time is assumed to follow a general distribution while the server’s lifetime and repair time is supposed to be exponentially distributed. The considered system is investigated by the method of asymptotic analysis under the condition of an unlimited growing number of sources. As a result, it is proved that the limiting probability distribution of the number of customers in the system follows a Gaussian distribution with given parameters. The Gaussian approximation and the estimations obtained by stochastic simulations of the prelimit probability distribution are compared to each other and measured by the Kolmogorov distance. Several examples are treated and figures show the accuracy and area of applicability of the proposed asymptotic method.

One of the popular and emerging networks is wireless sensor networks (WSN), where it comprises of an unlimited number of sensors deployed dynamically and irregularly in a geolocation, for a specific purpose. Each sensor node in the network sense, collect and transmit the environmental data from one location to other location. All the nodes have the capabilities of transmitting and receiving the documents. The major problem in WSN is energy efficiency and network lifetime. By reducing the energy consumption, the network life time can be increased. Clustering, scheduling and other related methods are used to reduce the energy consumption, during the data transmission and receiving. This paper proposed a Reliable Energy Efficient Data Aggregation (REEDA) method for improving the energy efficiency. All the common nodes or the cluster head nodes gather, aggregate, and transmit the data where it reduces the energy consumption. The aggregation method is applied according to correlation of data packets generated by entire node. Simulations results prove that the proposed algorithm provides a good solution for minimizing communication and computation cost.

In the recent field of research the wireless sensor network plays an important role. Wireless sensor network is an important technology in this era. A Wireless Sensor Network (WSN) is a distributed network contains enormous sensor nodes with wide range of application. It transmits unlimited and enormous data like image, video, audio and data through end to end network. WSNs offer much solution to remote real time monitoring, recognition of physical occurrence and target tracking applications. This network growth is increasingly rapidly day by day and made the research field in difficult resurgence. The extended network lifetime, effective load balancing and scalability are essential for WSNs. The life time of the wireless network can be extended by the concept of clustering .Clustering is process of grouping the smaller localized networks in highly structured way. Diverse cluster technology available based on the network the clustering concept will be used. Efficient routing algorithm provide the way for efficient usage of bandwidth and reduce the delay in the network . This paper provides the survey of clustering and routing protocols to improve the efficiency in wireless technology in recent years

Instrumented implants are a promising approach to further improve the clinical outcome of total hip arthroplasties. For the integrated sensors or active functions, an electrical power supply is required. Energy harvesting concepts can provide autonomous power with unlimited lifetime and are independent from external equipment. However, those systems occupy space within the mechanically loaded total hip replacement and can decrease the life span due to fatigue failure in the altered implant. We previously presented a piezoelectric energy harvesting system for an energy-autonomous instrumented total hip stem that notably changes the original implant geometry. The aim of this study was to investigate the remaining structural fatigue failure strength of the metallic femoral implant component in a worst-case scenario. Therefore, the modified hip stem was tested under load conditions based on ISO 7206-4:2010. The required five million cycles were completed twice by all samples (n = 3). Additionally applied cycles with incrementally increased load levels up to 4.7 kN did not induce implant failure. In total, 18 million cycles were endured, outperforming the requirements of the ISO standard. Supplementary finite element analysis was conducted to determine stress distribution within the implant. A high stress concentration was found in the region of modification. The stress level showed an increase compared to the previously evaluated physiological loading situation and was close to the fatigue data from the literature. The stress concentration factor compared to the original geometry amounted to 2.56. The assessed stress level in accordance with the experimental fatigue testing can serve as a maximum reference value for further implant design modifications and optimisations.

Introduction There are increasing levels of concern around the health of citizens within Western neo-liberal democracies like Britain, the USA, and Australia. These governmental concerns are made manifest by discursive mechanisms that seek to both survey and regulate the lifestyles, eating habits and exercise regimes of citizens. Such governmental imperatives have historically targeted schools with school food ranking high in the priorities of public health policy, particularly in regards to the fears around childhood obesity and related health problems (Gard and Wright, Rich, Vander Schee and Gard). However, more recently such concerns have spilled into the wider public arena in Australia where fears of an “obesity epidemic”, the revision of the “food pyramid” and recent calls that make it mandatory for fast food companies to display calorie/kilojoule content on menu boards illustrate the increasing levels to which governments seek to intervene regarding the health of citizens. Not only does the attempt to produce a healthy citizen take place within policy imperatives but also within popular culture. Here, we see healthy eating and diet shows becoming international brands. For example The Biggest Loser, where obese contestants embark on a televised diet and exercise regime, competing to lose the most weight in the shortest time, and also Jamie Oliver’s attempt to change the eating habits of the British has crossed the Atlantic to the USA. There is a sense of urgency embedded in many such discursive practices and an implication that, as a society, we need a “lifestyle change” to make us healthier. Reflecting this urgency is an increase in cookbooks that not only provide recipe ideas but also seek to intervene into our day-to-day conduct. The content of such books moves beyond ways of putting a meal together and into the territory of self-surveillance and regulation. In this way, then, cookbooks can be read as pedagogical. This particular brand of pedagogy, moreover, feeds into wider socio-political discourses around the governance of the self within our late modern context. This chapter will argue that many contemporary cookbooks attempt to enact governmental imperatives around health and nutrition and that, by doing this, they become pedagogical devices that translate governmental devices into the homes of their readers. By using a post-Foucauldian analytical framework, we will illustrate the ways in which Jane Kennedy’s cookbook, Fabulous Food, Minus the Boombah mobilises discourses of health, gender, risk, and food in a rich (but 99 per cent fat free) mix. Analytical Framework This paper draws upon Foucauldian governmentality studies and the ways in which discursive practices are enacted in order to position and offer an analysis of cookbooks as pedagogical devices that translate the work of government into readers’ homes. Foucault defined government as “the conduct of conduct” arguing that government relates to the “way in which the conduct of individuals or groups might be directed: the government of children, of souls, of communities, of families, of the sick […] to govern in this sense, is to structure the possible field of action” (220–1). Foucault argued that attempts to shape conduct occur within socio-historical moments and contexts (Gordon) and they are, therefore, subject to change. Within this article, we seek to understand the ways in which governmental imperatives around food and lifestyle are taken up by cookbook authors and the implications of this in terms of public pedagogies within our late-modern context. Public health is located within a myriad of governmental sites that attempt to regulate people’s lives. In deciphering how government sites operate as mechanisms of regulation in modern times, Miller and Rose suggest that we require: An investigation not merely of grand political schemata, or economic ambitions, or even of general slogans such as ‘state control’, nationalization, the free market, and the like, but of apparently humble and mundane mechanisms which appear to make it possible to govern […] the list is heterogeneous and is, in principle unlimited (32). Such investigations can be grouped under the umbrella of “governmentality studies”. To grasp “governmentality” is complex and requires an analytics that can span history, and reach across macro and micro contours to trace various linkages and connections forged between governmental rationalities, techniques and practices (Leahy, Assembling). For the purposes of this paper we will be offering an analytic of the humble cookbook and its potential role in the governance of the self, a technique vital to contemporary neo-liberal modes of governance. Neo-liberalism produces particular versions of health, citizenship, and individualism. Within neo-liberal governmental assemblages, public health policy operates as a key site for enacting what Miller and Rose label “government at a distance” (32) by working to facilitate the shifting of responsibility for the health of citizens from the State to the individual. The individual, however, does not instinctively know how to incorporate governmental hopes for a healthy lifestyle into their lives—it is here that the cookbook, as pedagogical device, is vital because it translates macro governmental hopes to the micro level, that is, into the kitchens of citizens. Both risk and expertise also work alongside neo-liberalism in the assemblage to render the problems of government both thinkable and calculable, and in turn, practical. We will see in the next section how Jane Kennedy, the author of Fabulous Food, Minus the Boombah deploys both popular notions of risk alongside her own experience and expertise (her lifelong “battle” with weight) in order to fold the (female) reader in to Kennedy’s particular approach to healthy eating. Pedagogy could be described as part of the “doing” of education, the means through which ideas are transmitted through and between learners and teachers. Like contemporary neo-liberal government, contemporary pedagogies can be understood as assemblages; that is, they are made up of competing, intersecting, contradictory and multiple elements. Pedagogy is a technical device through which these elements are translated and transmitted to its audience, be that school pupils, students, adult learners or citizens. Elizabeth Ellsworth argues that pedagogy is a “social relationship [that] is very close in. It gets right in there in your brain, your body, your heart, your sense of self, of the world, of others, and of possibilities and impossibilities in all those realms” (6). In other words, effective pedagogical devices are necessary contact points between ideas and the self; they inform relationships between the macro and the micro, thus shaping both the individual and the collective. The remainder of this paper will demonstrate how Fabulous Food, Minus the Boombah deploys popular discursive trends regarding food, health, gender, and citizenship as pedagogic tools that aim to cultivate a healthier subject. Food That Makes Your Arse Huge? “Boombah: (adj). Word to describe food that makes your arse huge” (Kennedy 5). Lifestyle, diet, and health books can be seen to have saturated the market over recent years in an almost epidemic-like way. This phenomenon both mirrors and informs governmental imperatives around the health and lifestyle of citizens. A recent visit to our local bookshop revealed that there appears to be a polarisation of texts relating to food, health, and wellbeing. Books that explicitly relate to health and health issues can be found in one section, and cookbooks in another. However, there are an increasing number of texts that blend the two genres and offer diet, health, and lifestyle tips along with recipe ideas and cooking techniques. Within this blend there is also variation; there are texts that offer a scientific exposition of food, nutrition, and diet, such as Ricotti and Connelly’s The Healthy Family Cookbook, a text which offers a twelve-chapter overview of current theories and practices around health and nutrition before offering recipe ideas designed to help the reader achieve and maintain a “healthy weight” (page). In addition there are also texts that fold particular approaches to weight-loss, such as Jenny Craig or The Biggest Loser, together with cooking. The input of celebrity chef Jamie Oliver to the mix has been well documented (see Pike; Leahy, Disgusting; Rawlins; Zimmet and James) and the influence of Oliver’s approachable style of writing can be found within many contemporary cookbooks, including Fabulous Food, Minus the Boombah, a text within which Jane Kennedy blends together cooking, health, and lifestyle into a paste that is bound together with a Bridget Jones-style confessional commentary on her own, personal struggles with weight and dieting. For example: “I love food. Always have. Unfortunately I love it about one kilo per month more than I should. Perhaps I should put it another way: the food I love seems to have more calories than I need over a month and a year and a lifetime … it adds up! Yep, I get FAT” (xi). This style can be read as a way of “getting right in” (Ellsworth 6), to enfold the reader into Kennedy’s world. It also may provide readers, particularly, as we will discus below, middle-class Anglo-Australian females, with a sense of solidarity in a struggle against weight gain. Kennedy often deploys the spectre of designer jeans that no longer fit as a way to further entice the reader to embrace the healthy eating regime promoted by the book. Kennedy draws upon notions of horror and disgust at the fat body (her own but, implicitly, also the readers). Horror and disgust are potent pedagogical devices that are often put to work in educational and health promotion settings in an attempt to lure people and their bodies into action (Leahy, Disgusting; Lupton). In many ways Kennedy’s cookbook can be read as public pedagogy—its aim is to teach the reader how to cook food that is “packed full of flavour but minus the boombah” (xxvii), or minus that which causes bodily harm and/or disgusting transformation. In order to achieve this, Kennedy deploys “expert knowledge” as she takes the reader on a journey through her own struggles with weight, fad diets and failure to epiphany—which for Kennedy was a personal trainer and a new approach to cooking, eating and lifestyle and her book is peppered with self help-style narrative devices, for example: The key to successful weight loss with this style of eating is to be organised. Disorganisation is the open door though which every second excuse (and French fry) slips. “Oh no, the stores are closed. Oh well, better order takeaway”. Don’t do it. There. Is. No. Good. Takeaway. Food. (Kennedy xxii, emphasis original). Several mechanisms are being deployed here. Firstly, she is inadvertently constructing the perfect western neo-liberal subject: organised, self-contained, disciplined, and able to make informed rational decisions around food type and purchase. Secondly, by predicting and addressing the reader’s perceived resistance, Kennedy reveals her moralistic overtones. We see the judgment of a rational, ordered subject versus a messy, disorganised, immoral (and fat) subject in a piling up of connotations that lead to the same conclusion: this healthy way is the best healthy way. Kennedy’s personal narrative within the text follows a trajectory of “awareness, struggle and epiphany” (Plummer 131) that often characterise the confessional stories that we tell about ourselves: “I ended up […] back at square one: overweight, staring down a year of chicken consommé dinners […] I finally grew a brain and motivated myself to see a personal trainer” (Kennedy xiv). Kennedy’s narrative is a familiar one and a Foucauldian reading of confession enables us to take the position that confession is imperative to the contemporary construction of self. Modes of confession have become increasingly diverse and reified through the era of reality TV, social networking and the “personal trauma” sub-genre of autobiographical memoir (Brien). Kennedy’s book deploys confession as a narrative device that, like her moralising about the dangers of take away food, attempts to fold the reader into her world and, as a result, reifies her approach to healthy eating and lifestyle. We can do it because she has done it. Through the confessional she is not only able to tell of her love of food but also of her understanding of it as risky. This can be outlined by drawing upon an extract we looked at earlier: “the food I love seems to have more calories than I need and over a month and a year and lifetime it adds up! Yep, I get FAT” (xi). Risk and expertise work alongside neo-liberal individualism in the governmental assemblage to render the problems of government both thinkable and calculable, and in turn, practical. Kennedy deploys both risk and expert knowledge in order to successfully demonstrate her understanding of healthy eating as a battleground that see her appetite and tastes at war with her waistline. She guides us through the various fad diets she has tried, through gaining weight while being pregnant, and the anguish of seeing her image reflected back at her through her career in television, until her epiphany: the realisation that in order to achieve and maintain a healthy weight a balance of healthy eating and exercise is required. These are convincing pedagogical strategies that encourage the reader to apply modes of self-governance that reflect wider, macro hopes for the healthy neo-liberal citizen and Kennedy’s status as TV celebrity within Australia. Her use of the colloquial term “boombah” makes hers a uniquely Australian endeavour. It is worth noting here that Kennedy’s brand of Australian humour and use of colloquialism is deeply entrenched with raced and classed assumptions about desirable body size and the economic and cultural capital of its readers. It is middle class white Anglo-Australian women who are being targeted by this book and, arguably, by this brand of public pedagogy. As with many contemporary cultural texts about cooking, Kennedy’s book promotes an: “upper-middle-class lifestyle enhanced by the appropriation of goods and commodities. All the while, real issues surrounding the life-sustaining reality of food are ignored” (Wright and Sandlin 406). The lifestyle promoted by Kennedy is classed in this way. She writes of Bettina Liano jeans, of working on the popular Australian television show A Current Affair, of drinking wine, and using goats cheese and kaffir lime leaves in her cooking. Her levels of economic and cultural capital are obvious, and this sets the scene well for the type of reader she is attempting to educate. Although she does not explicitly mention gender, her “Bridget Jones”-style confessions of dietary failure (though Kennedy succeeds where Bridget would inevitably continue to fail), the mention of cooking both children’s and adult’s dinners, and the illustrations throughout the book that feature children’s toys implicitly position her as a “typical modern woman” with a career and a family to boot. In terms of pedagogy, Kennedy’s book reflects contemporary governmental discourse around health, food and wellbeing. It is designed “to shape with some degree of deliberation aspects of our behaviour according to particular sets of norms and for a variety of ends” (Dean 18). It reflects government fears around obesity, portion size, calorific content, and body shape. Pike and Leahy argue that food pedagogies provide government, and in this case the individual, with opportunities to shape, sculpt, mobilise, and work through the food choices, desires and aspirations, needs, wants, and lifestyles of parents, families, and children. The explicit intention of food pedagogies is to enlist the public into a process of “governmental self formation”: that is, “the ways in which various authorities and agencies seek to shape the conduct, aspirations, needs, desires and capacities of specified political and social categories, to enlist them in particular strategies and to seek definite goals” (Dean 563). Fabulous Food, Minus the Boombah then uses confession as a springboard to enlisting its readers into a healthier lifestyle and, more importantly, a healthier, risk aversive relationship with food. It individualises this struggle, and, like all good neo-liberal subjects, presents a healthy diet as an individual struggle: This way of cooking and eating works for me […] I feel much healthier and happier and I’ve got a lot more energy […] These recipes have to be better for you than chowing down a creepy bowl of 2 minute noodles and an entire pack of Tim Tams (yes, it’s time to let go). Be disciplined, even if you’ve struggled before. And if you really can’t live without your nightly routine of creamy pasta […] then bung this book back on the shelf. But stop whingeing about your huge arse (xix). This passage illustrates Kennedy’s pedagogy well, particularly the way in which her pedagogy is infused with neo-liberal discursive techniques. She positions herself as expert by stating that her way of cooking “works for me” as well as by deploying phrases like “I feel” and “I’ve got”. She then expertly shifts the reader’s focus from herself to the governance of the self by stating that it is up to the individual to be self-disciplined. Her pedagogy is littered with risk discourse as she informs us that you can continue to eat as you wish, but that there are consequences (a “huge arse”). This particular brand of risk discourse is gendered, as it is arguably mostly women who worry about the size of this part of their anatomy. One of the greatest contradictions of a neo-liberal approach to governance is that at the same time as promoting individual responsibility, there is also a strong emphasis on the collective. Kennedy reflects this throughout the book, as the above passage suggests. Her introductory section acts as a guide for the reader, who—once enfolded into Kennedy’s approach—she lets make their own way with encouragement. This is manifest in her final statements, “So let’s say goodbye to boombah. Go for it! And enjoy!” (xxvii). As pedagogy, then, Fabulous Food, Minus the Boombah attempts to cultivate and shape the reader’s choices around food by providing a practical means for transforming not only the reader’s food practices but also her image and self-esteem. This is achieved by the author’s supplement of supplying expert information, cooking skills, guidance, and incitement. Let’s Say Goodbye to Boombah? This paper has demonstrated how the contemporary cookbook can be read as pedagogy. In some ways the humble cookbook has always been pedagogical; seeking to teach the reader to make something that they previously did not, presumably, know how to, as well as providing cooking techniques and advice on the most suitable produce to use in particular recipes. However, in the contemporary moment, the cookbook arguably increasingly acts as a translation mechanism for governmental imperatives around food, health, and wellbeing. We have taken one cookbook amongst many as an illustration of our thesis. Jane Kennedy’s Fabulous Food Minus the Boombah is an Australian example of the neo-liberal project that lies at the heart of contemporary modes of governance of the population, but also, and more importantly, governance of the self. At the very heart of neo-liberalism is an imagined subject. That is, neo-liberalism needs and wants citizens to be autonomous, health seeking, enterprising, rational, choice-making individuals. The contemporary cookbook, it has been argued, can assist the individual in the production of a healthier-eating self. However, the more complex and intersecting aspects of selfhood—aspects such as socio-economic status, gender, location and ethnicity—are often absent from the construction of the healthy individual promoted by the contemporary cookbook. Above all, this paper has sought to problematise some of the dominant discourse around food, health, and wellbeing that can be found on the pages of the modern-day cookbook. 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This article explores how fat women protesting challenges norms of womanhood, the place of women in society, and who has the power to have their say in public spaces. We use the term fat as a political reclamation; Fat Studies scholars and fat activists prefer the term fat, over the normative term “overweight” and the pathologising term “obese/obesity” (Lee and Pausé para 3). Who is and who isn’t fat, we suggest, is best left to self-determination, although it is generally accepted by fat activists that the term is most appropriately adopted by individuals who are unable to buy clothes in any store they choose. Using a tweet from conservative commentator Ann Coulter as a leaping-off point, we examine the narratives around women in the public sphere and explore how fat bodies might transgress further the norms set by society. The public representations of women in politics and protest are then are set in the context of ‘activist wisdom’ (Maddison and Scalmer) from two sides of the globe. Activist wisdom gives preference to the lived knowledge and experience of activists as tools to understand social movements. It seeks to draw theoretical implications from the practical actions of those on the ground. In centring the experiences of ourselves and other activists, we hope to expand existing understandings of body politics, gender, and political power in this piece. It is important in researching social movements to look both at the representations of protest and protestors in all forms of media as this is the ‘public face’ of movements, but also to examine the reflections of the individuals who collectively put their weight behind bringing social change.A few days after the 45th President of the United States was elected, people around the world spilled into the streets and participated in protests; precursors to the Women’s March which would take place the following January. Pictures of such marches were shared via social media, demonstrating the worldwide protest against the racism, misogyny, and overall oppressiveness, of the newly elected leader. Not everyone was supportive of these protests though; one such conservative commentator, Ann Coulter, shared this tweet: Image1: A tweet from Ann Coulter; the tweet contains a picture of a group of protestors, holding signs protesting Trump, white supremacy, and for the rights of immigrants. In front of the group, holding a megaphone is a woman. Below the picture, the text reads, “Without fat girls, there would be no protests”.Coulter continued on with two more tweets, sharing pictures of other girls protesting and suggesting that the protestors needed a diet programme. Kivan Bay (“Without Fat Girls”) suggested that perhaps Coulter was implying that skinny girls do not have time to protest because they are too busy doing skinny girl things, like buying jackets or trying on sweaters. Or perhaps Coulter was arguing that fat girls are too visible, too loud, and too big, to be taken seriously in their protests. These tweets provide a point of illustration for how fat women protesting challenge norms of womanhood, the place of women in society, and who has the power to have their say in public spaces While Coulter’s tweet was most likely intended as a hostile personal attack on political grounds, we find it useful in its foregrounding of gender, bodies and protest which we consider in this article, beginning with a review of fat girls’ role in social justice movements.Across the world, we can point to fat women who engage in activism related to body politics and more. Australian fat filmmaker and activist Kelli Jean Drinkwater makes documentaries, such as Aquaporko! and Nothing to Lose, that queer fat embodiment and confronts body norms. Newly elected Ontario MPP Jill Andrew has been fighting for equal rights for queer people and fat people in Canada for decades. Nigerian Latasha Ngwube founded About That Curvy Life, Africa’s leading body positive and empowerment site, and has organised plus-size fashion show events at Heineken Lagos Fashion and Design Week in Nigeria in 2016 and the Glitz Africa Fashion Week in Ghana in 2017. Fat women have been putting their bodies on the line for the rights of others to live, work, and love. American Heather Heyer was protesting the hate that white nationalists represent and the danger they posed to her friends, family, and neighbours when she died at a rally in Charlottesville, North Carolina in late 2017 (Caron). When Heyer was killed by one of those white nationalists, they declared that she was fat, and therefore her body size was lauded loudly as justification for her death (Bay, “How Nazis Use”; Spangler).Fat women protesting is not new. For example, the Fat Underground was a group of “radical fat feminist women”, who split off from the more conservative NAAFA (National Association to Aid Fat Americans) in the 1970s (Simic 18). The group educated the public about weight science, harassed weight-loss companies, and disrupted academic seminars on obesity. The Fat Underground made their first public appearance at a Women’s Equality Day in Los Angeles, taking over the stage at the public event to accuse the medical profession of murdering Cass Elliot, the lead singer of the folk music group, The Mamas and the Papas (Dean and Buss). In 1973, the Fat Underground produced the Fat Liberation Manifesto. This Manifesto began by declaring that they believed “that fat people are full entitled to human respect and recognition” (Freespirit and Aldebaran 341).Women have long been disavowed, or discouraged, from participating in the public sphere (Ginzberg; van Acker) or seen as “intruders or outsiders to the tough world of politics” (van Acker 118). The feminist slogan the personal is political was intended to shed light on the role that women needed to play in the public spheres of education, employment, and government (Caha 22). Across the world, the acceptance of women within the public sphere has been varied due to cultural, political, and religious, preferences and restrictions (Agenda Feminist Media Collective). Limited acceptance of women in the public sphere has historically been granted by those ‘anointed’ by a male family member or patron (Fountaine 47).Anti-feminists are quick to disavow women being in public spaces, preferring to assign them the role as helpmeet to male political elite. As Schlafly (in Rowland 30) notes: “A Positive Woman cannot defeat a man in a wrestling or boxing match, but she can motivate him, inspire him, encourage him, teach him, restrain him, reward him, and have power over him that he can never achieve over her with all his muscle.” This idea of women working behind the scenes has been very strong in New Zealand where the ‘sternly worded’ letter is favoured over street protest. An acceptable route for women’s activism was working within existing political institutions (Grey), with activity being ‘hidden’ inside government offices such as the Ministry of Women’s Affairs (Schuster, 23). But women’s movement organisations that engage in even the mildest form of disruptive protest are decried (Grey; van Acker).One way women have been accepted into public space is as the moral guardians or change agents of the entire political realm (Bliss; Ginzberg; van Acker; Ledwith). From the early suffrage movements both political actors and media representations highlighted women were more principled and conciliatory than men, and in many cases had a moral compass based on restraint. Cartoons showed women in the suffrage movement ‘sweeping up’ and ‘cleaning house’ (Sheppard 123). Groups like the Women’s Christian Temperance Union were celebrated for protesting against the demon drink and anti-pornography campaigners like Patricia Bartlett were seen as acceptable voices of moral reason (Moynihan). And as Cunnison and Stageman (in Ledwith 193) note, women bring a “culture of femininity to trade unions … an alternative culture, derived from the particularity of their lives as women and experiences of caring and subordination”. This role of moral guardian often derived from women as ‘mothers’, responsible for the physical and moral well-being of the nation.The body itself has been a sight of protest for women including fights for bodily autonomy in their medical decisions, reproductive justice, and to live lives free from physical and sexual abuse, have long been met with criticisms of being unladylike or inappropriate. Early examples decried in NZ include the women’s clothing movement which formed part of the suffrage movement. In the second half of the 20th century it was the freedom trash can protests that started the myth of ‘women burning their bras’ which defied acceptable feminine norms (Sawer and Grey). Recent examples of women protesting for body rights include #MeToo and Time’s Up. Both movements protest the lack of bodily autonomy women can assert when men believe they are entitled to women’s bodies for their entertainment, enjoyment, and pleasure. And both movements have received considerable backlash by those who suggest it is a witch hunt that might ensnare otherwise innocent men, or those who are worried that the real victims are white men who are being left behind (see Garber; Haussegger). Women who advocate for bodily autonomy, including access to contraception and abortion, are often held up as morally irresponsible. As Archdeacon Bullock (cited in Smyth 55) asserted, “A woman should pay for her fun.”Many individuals believe that the stigma and discrimination fat people face are the consequences they sow from their own behaviours (Crandall 892); that fat people are fat because they have made poor decisions, being too indulgent with food and too lazy to exercise (Crandall 883). Therefore, fat people, like women, should have to pay for their fun. Fat women find themselves at this intersection, and are often judged more harshly for their weight than fat men (Tiggemann and Rothblum). Examining Coulter’s tweet with this perspective in mind, it can easily be read as an attempt to put fat girl protestors back into their place. It can also be read as a warning. Don’t go making too much noise or you may be labelled as fat. Presenting troublesome women as fat has a long history within political art and depictions. Marianne (the symbol of the French Republic) was depicted as fat and ugly; she also reinforced an anti-suffragist position (Chenut 441). These images are effective because of our societal views on fatness (Kyrölä). Fatness is undesirable, unworthy of love and attention, and a representation of poor character, lack of willpower, and an absence of discipline (Murray 14; Pausé, “Rebel Heart” para 1).Fat women who protest transgress rules around body size, gender norms, and the appropriate place for women in society. Take as an example the experiences of one of the authors of this piece, Sandra Grey, who was thrust in to political limelight nationally with the Campaign for MMP (Grey and Fitzsimmons) and when elected as the President of the New Zealand Tertiary Education Union in 2011. Sandra is a trade union activist who breaches too many norms set for the “good woman protestor,” as well as the norms for being a “good fat woman”. She looms large on a stage – literally – and holds enough power in public protest to make a crowd of 7,000 people “jump to left”, chant, sing, and march. In response, some perceive Sandra less as a tactical and strategic leader of the union movement, and more as the “jolly fat woman” who entertains, MCs, and leads public events. Though even in this role, she has been criticised for being too loud, too much, too big.These criticisms are loudest when Sandra is alongside other fat female bodies. When posting on social media photos with fellow trade union members the comments often note the need of the group to “go on a diet”. The collective fatness also brings comments about “not wanting to fuck any of that group of fat cows”. There is something politically and socially dangerous about fat women en masse. This was behind the responses to Sandra’s first public appearance as the President of TEU when one of the male union members remarked “Clearly you have to be a fat dyke to run this union.” The four top elected and appointed positions in the TEU have been women for eight years now and both their fatness and perceived sexuality present as a threat in a once male-dominated space. Even when not numerically dominant, unions are public spaces dominated by a “masculine culture … underpinned by the undervaluation of ‘women’s worth’ and notions of womanhood ‘defined in domesticity’” (Cockburn in Kirton 273-4). Sandra’s experiences in public space show that the derision and methods of putting fat girls back in their place varies dependent on whether the challenge to power is posed by a single fat body with positional power and a group of fat bodies with collective power.Fat Girls Are the FutureOn the other side of the world, Tara Vilhjálmsdóttir is protesting to change the law in Iceland. Tara believes that fat people should be protected against discrimination in public and private settings. Using social media such as Facebook and Instagram, Tara takes her message, and her activism, to her thousands of followers (Keller, 434; Pausé, “Rebel Heart”). And through mainstream media, she pushes back on fatphobia rhetoric and applies pressure on the government to classify weight as a protected status under the law.After a lifetime of living “under the oppression of diet culture,” Tara began her activism in 2010 (Vilhjálmsdóttir). She had suffered real harm from diet culture, developing an eating disorder as a teen and being told through her treatment for it that her fears as a fat woman – that she had no future, that fat people experienced discrimination and stigma – were unfounded. But Tara’s lived experiences demonstrated fat stigma and discrimination were real.In 2012, she co-founded the Icelandic Association for Body Respect, which promotes body positivity and fights weight stigma in Iceland. The group uses a mixture of real life and online tools; organising petitions, running campaigns against the Icelandic version of The Biggest Loser, and campaigning for weight to be a protected class in the Icelandic constitution. The Association has increased the visibility of the dangers of diet culture and the harm of fat stigma. They laid the groundwork that led to changing the human rights policy for the city of Reykjavík; fat people cannot be discriminated against in employment settings within government jobs. As the city is one of the largest employers in the country, this was a large step forward for fat rights.Tara does receive her fair share of hate messages; she’s shared that she’s amazed at the lengths people will go to misunderstand what she is saying (Vilhjálmsdóttir). “This isn’t about hurt feelings; I’m not insulted [by fat stigma]. It’s about [fat stigma] affecting the livelihood of fat people and the structural discrimination they face” (Vilhjálmsdóttir). She collects the hateful comments she receives online through screenshots and shares them in an album on her page. She believes it is important to keep a repository to demonstrate to others that the hatred towards fat people is real. But the hate she receives only fuels her work more. As does the encouragement she receives from people, both in Iceland and abroad. And she is not alone; fat activists across the world are using Web 2.0 tools to change the conversation around fatness and demand civil rights for fat people (Pausé, “Rebel Heart”; Pausé, “Live to Tell").Using Web 2.0 tools as a way to protest and engage in activism is an example of oppositional technologics; a “political praxis of resistance being woven into low-tech, amateur, hybrid, alternative subcultural feminist networks” (Garrison 151). Fat activists use social media to engage in anti-assimilationist activism and build communities of practice online in ways that would not be possible in real life (Pausé, “Express Yourself” 1). This is especially useful for those whose protests sit at the intersections of oppressions (Keller 435; Pausé, “Rebel Heart” para 19). Online protests have the ability to travel the globe quickly, providing opportunities for connections between protests and spreading protests across the globe, such as SlutWalks in 2011-2012 (Schuster 19). And online spaces open up unlimited venues for women to participate more freely in protest than other forms (Harris 479; Schuster 16; Garrison 162).Whether online or offline, women are represented as dangerous in the political sphere when they act without male champions breaching norms of femininity, when their involvement challenges the role of woman as moral guardians, and when they make the body the site of protest. Women must ‘do politics’ politely, with utmost control, and of course caringly; that is they must play their ‘designated roles’. Whether or not you fit the gendered norms of political life affects how your protest is perceived through the media (van Acker). Coulter’s tweet loudly proclaimed that the fat ‘girls’ protesting the election of the 45th President of the United States were unworthy, out of control, and not worthy of attention (ironic, then, as her tweet caused considerable conversation about protest, fatness, and the reasons not to like the President-Elect). 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