Resource efficiency: creating a route to logistics and the circular economy

Resource productivity needs to increase by 30% toward 2030, delivering a purported increase in employment while delivering a net benefit to GDP of 1% (European Commission, 2014). The Europe 2020 strategy will necessitate changes in product and service delivery (lightweighting) and a requirement for systems to support the flows of materials at end of life for collection, separation and re-use. There is a demand for resource efficiency improvements across a range of industrial sectors and a need for whole supply chain cooperation to ensure maximum impact of the circular economy concept. However with current challenges over quality and quantity of products moving through reverse logistics networks (Niknejad & Petrovic, 2014), this will undoubtedly place a need on current infrastructure [logistics] to review working practices. Innovative solutions will be required by industry to deliver sustainable networks that support aligned flows of manufacturing processes delivering supply chain surplus (Zhong, 2009)

PEMBERDAYAAN USAHA KECIL MENENGAH OLEHDINAS PERTANIAN KOTA SURABAYA(Studi Kasus pada UKM Makanan dan Minuman diEkowisata Hutan Mangrove Wonorejo Surabaya)

Pemberdayaan masyarakat merupakan salah satu upaya yang dilakukan oleh Pemerintah dalam meningkatkan kesejahteraan masyarakat di tiap daerah. Upaya pemberdayaan juga dapat dilakukan melalui sektor pariwisata dan sumber daya alam lokal yang dimiliki di setiap daerah. Salah satunya ekowisata hutan mangrove di Kelurahan Wonorejo Surabaya. Kawasan ini sangat strategis untuk dikembangkan dalam bidang wisata demi membangun perekonomian dan menunjang kesejahteraan masyarakat sekitar karena masyarakat dapat mendirikan beberapa UKM sehingga dapat menambah penghasilan dan menciptakan lapangan kerja baru.Tujuan dalam penelitian ini adalah untuk mengetahui pemberdayaan Usaha Kecil Menengah (UKM) oleh Dinas Pertanian pada UKM makanan dan minuman di ekowisata hutan mangrove Wonorejo Surabaya. Pendekatan dalam penelitian ini adalah penelitian deskriptif dengan pendekatan kualitatif. Sumber data yang digunakan terdiri dari beberapa informan dan lokasi penelitian. Teknik pengumpulan data yang digunakan yaitu wawancara, observasi dan dokumentasi. Teknik analisis data melalui pengumpulan data, reduksi data, penyajian data dan penarikan kesimpulan/verifikasi.Hasil penelitian menunjukan bahwa pemberdayaan UKM di ekowisata hutan mangrove Wonorejo dilihat dari aspek pemungkinan yakni masyarakat kini dapat tambahan penghasilan dengan berjualan makanan dan minuman bagi para pengunjung, aspek penguatan yakni dilakukan dengan pemberian pelatihan pemasaran kepada pelaku UKM, aspek perlindungan yakni perlindungan berupa perda yang melindungi kawasan hutan mangrove dari kegiatan pembangunan perumahan, aspek penyokongan yakni melalui pasar murah yang membantu pelaku UKM agar produknya lebih dikenal oleh masyarakat, aspek pemeliharaan yakni memberikan sosialisasi dan pelatihan supaya masyarakat dapat lebih merawat dan memelihara hutan mangrove karena dapat memberikan mereka sumber penghasilan.Kata kunci : Usaha Kecil Menengah, Pemberdayaa

The theory of recttification in biological systems

The theory of biological rectification originated from the study of physiological processes of the human body. Biological processes are defined by certain structures; biological rectification is achieved by biological structures too. These rectifying biological structures are the biological rectifying valves, a definition adopted from physics. An extension of this notion leads to a generalization of the rectification phenomena in biological systems. The practical value of this theoretical concept is widely presumed. Here we show that the loss of rectification may result in dysfunction or even destruction of the biological system, the rectification implies the simplification of biological processes, reduce the utilization of energy in biological systhems and in general can help in understanding the processes in the human body and biology better. We hope that experts of different scientific fields will probably confirm or disprove this hypothesis.

How to Wake up Your Neighbors: Safe and Nearly Optimal Generic Energy Conservation in Radio Networks

Recent work [Chang et al., 2018; Chang et al., 2020; Varsha Dani et al., 2021] has shown that it is sometimes feasible to significantly reduce the energy usage of some radio-network algorithms by adaptively powering down the radio receiver when it is not needed. Although past work has focused on modifying specific network algorithms in this way, we now ask the question of whether this problem can be solved in a generic way, treating the algorithm as a kind of black box. We are able to answer this question in the affirmative, presenting a new general way to modify arbitrary radio-network algorithms in an attempt to save energy. At the expense of a small increase in the time complexity, we can provably reduce the energy usage to an extent that is provably nearly optimal within a certain class of general-purpose algorithms. As an application, we show that our algorithm reduces the energy cost of breadth-first search in radio networks from the previous best bound of 2^O(?{log n}) to polylog(n), where n is the number of nodes in the network A key ingredient in our algorithm is hierarchical clustering based on additive Voronoi decomposition done at multiple scales. Similar clustering algorithms have been used in other recent work on energy-aware computation in radio networks, but we believe the specific approach presented here may be of independent interest

The Energy Complexity of Broadcast

Energy is often the most constrained resource in networks of battery-powered devices, and as devices become smaller, they spend a larger fraction of their energy on communication (transceiver usage) not computation. As an imperfect proxy for true energy usage, we define energy complexity to be the number of time slots a device transmits/listens; idle time and computation are free. In this paper we investigate the energy complexity of fundamental communication primitives such as broadcast in multi-hop radio networks. We consider models with collision detection (CD) and without (No-CD), as well as both randomized and deterministic algorithms. Some take-away messages from this work include: 1. The energy complexity of broadcast in a multi-hop network is intimately connected to the time complexity of leader election in a single-hop (clique) network. Many existing lower bounds on time complexity immediately transfer to energy complexity. For example, in the CD and No-CD models, we need $\Omega(\log n)$ and $\Omega(\log^2 n)$ energy, respectively. 2. The energy lower bounds above can almost be achieved, given sufficient ($\Omega(n)$) time. In the CD and No-CD models we can solve broadcast using $O(\frac{\log n\log\log n}{\log\log\log n})$ energy and $O(\log^3 n)$ energy, respectively. 3. The complexity measures of Energy and Time are in conflict, and it is an open problem whether both can be minimized simultaneously. We give a tradeoff showing it is possible to be nearly optimal in both measures simultaneously. For any constant $\epsilon>0$, broadcast can be solved in $O(D^{1+\epsilon}\log^{O(1/\epsilon)} n)$ time with $O(\log^{O(1/\epsilon)} n)$ energy, where $D$ is the diameter of the network