Sawah Baru Landscape Identification for Agroedutourism Agriculture 4.0, A Community-Based Development Project

IPB University has adequate agricultural land facilities and infrastructure for education and research activities. It has the potential to be developed into an agricultural area 4.0 for agrotourism activities, one of which is in the landscape of the Babakan Education Garden or Farm Teaching Sawah Baru located in Babakan Village, Dramaga District, Bogor Regency. This study aims to identify the character of the Sawah Baru landscape for the development of community-based agricultural agrotourism 4.0. The analysis used in this study used direct observation of the field and the literature study method. The identification of several aspects in the field is carried out using drones to obtain aerial photos, which are then processed using software to produce orthophotos and continue to digitize the boundaries of the research location using spatial analyst tools. The stages of identifying new rice field landscapes for the development of community-based agricultural agrotourism 4.0 include several stages, namely the preparation and inventory stages. The results of the identification of several aspects consisting of landscape sustainability, potential tourist attraction and tourism-supporting potential show that in terms of landscape sustainability, the criteria of each existing aspect are excellent and suitable to be developed into tourist destinations. Regarding potential tourist destinations, the study area presents aspects that have the potential to attract visitors. Finally, regarding tourism-supporting potential, Sawah Baru has tourism-supporting aspects that are quite adequate to meet the needs of tourism activities. However, there is still a need to create additional facilities and utilities that can support user activity on the site. Keywords: agriculture 4.0, agroedutourism, community-based, Sawah Baru DOI: 10.7176/CER/15-1-06 Publication date: May 28th 202

Defining pathways to healthy sustainable urban development

Goals and pathways to achieve sustainable urban development have multiple interlinkages with human health and wellbeing. However, these interlinkages have not been examined in depth in recent discussions on urban sustainability and global urban science. This paper fills that gap by elaborating in detail the multiple links between urban sustainability and human health and by mapping research gaps at the interface of health and urban sustainability sciences. As researchers from a broad range of disciplines, we aimed to: 1) define the process of urbanization, highlighting distinctions from related concepts to support improved conceptual rigour in health research; 2) review the evidence linking health with urbanization, urbanicity, and cities and identify cross-cutting issues; and 3) highlight new research approaches needed to study complex urban systems and their links with health. This novel, comprehensive knowledge synthesis addresses issue of interest across multiple disciplines. Our review of concepts of urban development should be of particular value to researchers and practitioners in the health sciences, while our review of the links between urban environments and health should be of particular interest to those outside of public health. We identify specific actions to promote health through sustainable urban development that leaves no one behind, including: integrated planning; evidence-informed policy-making; and monitoring the implementation of policies. We also highlight the critical role of effective governance and equity-driven planning in progress towards sustainable, healthy, and just urban development

Pengaruh Penambahan Molases sebagai Sumber Glukosa terhadap Karakteristik Fisiko-Kimia Silase Rumput Gajah

This study aimed to examine the molasses addition as a glucose source in the process of elephant grass silage. A completely randomized design consisting of five treatments and five replications was used in this study. The treatments were P1: elephant grass (EG) as control, P2: EG + 2.5% molasses, P3: EG + 5% molasses, P4: EG + 7.5% molasses and P5: EG + 10% molasses based on dry matter. All the treatments were ensiled for 30 days. The parameters included physical quality were aroma, mold growth, texture while the chemical quality parameters were pH, dry matter, dry matter loss, and fleigh value. The data were analyzed for variance and if there were differences between treatments, the Duncan's test was conducted at the 5% level. The results showed that 10% molasses addition had a significant effect (p<0.05) on the physical and chemical qualities of elephant grass silage. The elephant grass silage had a distinctive fermented aroma, no fungi, smooth texture, no clump, and brownish-green color following the molasses color. The pH of elephant grass silage was 3.37-4.52, the silage dry matter was around 27.5%-32.5%, the dry matter loss was around 2.76%-6.73%, while the fleigh value was around 79.2-135. It could be concluded that molasses could be used as a stimulant additive to ensilage elephant grass. Key words: dry matter loss, elephant grass, fungal growth, fleigh value, molasses, pH, silag

High-field plasma acceleration in a high-ionization-potential gas

International audiencePlasma accelerators driven by particle beams are a very promising future accelerator technology as they can sustain high accelerating fields over long distances with high energy efficiency. They rely on the excitation of a plasma wave in the wake of a drive beam. To generate the plasma, a neutral gas can be field-ionized by the head of the drive beam, in which case the distance of acceleration and energy gain can be strongly limited by head erosion. Here we overcome this limit and demonstrate that electrons in the tail of a drive beam can be accelerated by up to 27 GeV in a high-ionization-potential gas (argon), boosting their initial 20.35 GeV energy by 130%. Particle-in-cell simulations show that the argon plasma is sustaining very high electric fields, of ~150 GV/m, over ~20 cm. The results open new possibilities for the design of particle beam drivers and plasma sources

Summary of the BDS and MDI CLIC08 Working Group

This note summarizes the presentations held within the Beam Delivery System and Machine Detector Interface working group of the CLIC08 workshop. The written contributions have been provided by the presenters on a voluntary basis

Wakefield Generation in Hydrogen and Lithium Plasmas at FACET-II: Diagnostics and First Beam-Plasma Interaction Results

Plasma Wakefield Acceleration (PWFA) provides ultrahigh acceleration gradients of 10s of GeV/m, providing a novel path towards efficient, compact, TeV-scale linear colliders and high brightness free electron lasers. Critical to the success of these applications is demonstrating simultaneously high gradient acceleration, high energy transfer efficiency, and preservation of emittance, charge, and energy spread. Experiments at the FACET-II National User Facility at SLAC National Accelerator Laboratory aim to achieve all of these milestones in a single stage plasma wakefield accelerator, providing a 10 GeV energy gain in a <1 m plasma with high energy transfer efficiency. Such a demonstration depends critically on diagnostics able to measure emittance with mm-mrad accuracy, energy spectra to determine both %-level energy spread and broadband energy gain and loss, incoming longitudinal phase space, and matching dynamics. This paper discusses the experimental setup at FACET-II, including the incoming beam parameters from the FACET-II linac, plasma sources, and diagnostics developed to meet this challenge. Initial progress on the generation of beam ionized wakes in meter-scale hydrogen gas is discussed, as well as commissioning of the plasma sources and diagnostics

Generation and acceleration of electron bunches from a plasma photocathode

Plasma waves generated in the wake of intense, relativistic laser1,2 or particle beams3,4 can accelerate electron bunches to gigaelectronvolt energies in centimetre-scale distances. This allows the realization of compact accelerators with emerging applications ranging from modern light sources such as the free-electron laser to energy frontier lepton colliders. In a plasma wakefield accelerator, such multi-gigavolt-per-metre wakefields can accelerate witness electron bunches that are either externally injected5,6 or captured from the background plasma7,8. Here we demonstrate optically triggered injection9–11 and acceleration of electron bunches, generated in a multi-component hydrogen and helium plasma employing a spatially aligned and synchronized laser pulse. This ‘plasma photocathode’ decouples injection from wake excitation by liberating tunnel-ionized helium electrons directly inside the plasma cavity, where these cold electrons are then rapidly boosted to relativistic velocities. The injection regime can be accessed via optical11 density down-ramp injection12–16 and is an important step towards the generation of electron beams with unprecedented low transverse emittance, high current and 6D-brightness17. This experimental path opens numerous prospects for transformative plasma wakefield accelerator applications based on ultrahigh-brightness beams