PENAMBAHAN SERBUK LIMBAH KACA DAN ABU DAUN BAMBU TERHADAP KINERJA PAVING BLOCK

Kaca merupakan salah satu benda yang tidak bisa dilepaskan dari kehidupan manusia. Berdasarkan data Menteri Lingkungan dan Kehutanan (LHK) tahun 2020 menyebutkan bahwa data sampah di Indonesia mencapai 67.8 juta ton, dari jumlah tersebut 0.7 juta ton merupakan sampah kaca. Diketahui jenis sampah yang dihasilkan di Indonesia adalah sampah organik (60%), sampah plastik (14%), sampah kertas (9%), metal (4.3%), kaca dan kayu (12.7%). Tujuan penelitian ini “Mengetahui pengaruh penambahan serbuk limbah kaca dan abu daun bambu terhadap kinerja paving block”. Data yang dibutuhkan dalam penelitian ini adalah data primer dan data sekunder. Teknik yang digunakan untuk mengumpulkan data primer dalam penelitian ini adalah metode eksperimental. Data yang akan dianalisis diperoleh dari hasil pengujian di laboratorium dengan menggunakan 45 sampel. Data dianalisis dengan menggunakan uji Regresi Linier berganda. Semua analisis menggunakan software SPSS yang kemudian di sajikan dalam bentuk tabel, gambar dan deskripsi. Hasil penelitian menunjukan rata-rata mutu kuat tekan paving block adalah mutu B dengan persamaan regresi Y = 19.010+ (-0.119) X1 + (0.063) X2, sedangkan untuk penyerapan adalah mutu D dengan persamaan regresi Y = 10.598 + (-0.094) X1 + (-0.001) X2. Secara general, penambahan limbah kaca dan abu daun bambu memberikan pengaruh terhadap kuat tekan dan penyerapan air paving block.

Animation Art Design Online System Based on Mobile Edge Computing and User Perception

Based on mobile edge computing and user perception technology, this paper analyzes and discusses the respective advantages and disadvantages of the important optimization models and mobile models in the animation art design, as well as the wireless block data transmission mechanism and protocol. In order to solve the problem that user mobility cannot be sensed, a content-centric mobile edge animation art design mechanism based on user mobility perception is proposed. This mechanism comprehensively calculates the centrality of users’ perception of nodes, the idle rate of animation design, and the staying time of users in a small area. The mobile edge network controller integrates the information of each edge user’s perception node, calculates the importance of each edge user’s perception node and prioritizes it, and selects the appropriate content animation to design the user perception node according to the ranking result. Finally, various simulation or platform test experiments were carried out for all the design schemes in this paper, and the experimental results were analyzed. The simulation experiment results show that compared with the traditional animation design mechanism, the animation art design system effectively reduces the average number of hops for users to obtain content by up to 15.9%, improves the hit rate of edge user perception node animation design by at least 13.7%, and reduces the traffic entering the core network by up to 32.1%. According to the comparison results, the various designs in this work can successfully use sensor data to preclassify migration tasks in the mobile edge network environment. Compared with the latest block data transmission protocol, it has a significant performance improvement, reducing the data distribution delay by 34.8%, thereby helping to improve the overall efficiency of mobile edge computing.

SASLedger: A Secured, Accelerated Scalable Storage Solution for Distributed Ledger Systems

Blockchain technology provides a “tamper-proof distributed ledger” for its users. Typically, to ensure the integrity and immutability of the transaction data, each node in a blockchain network retains a full copy of the ledger; however, this characteristic imposes an increasing storage burden upon each node with the accumulation of data. In this paper, an off-chain solution is introduced to relieve the storage burden of blockchain nodes while ensuring the integrity of the off-chain data. In our solution, an off-chain remote DB server stores the fully replicated data while the nodes only store the commitments of the data to verify whether the off-chain data are tampered with. To minimize the influence on performance, the nodes will store data locally at first and transfer it to the remote DB server when otherwise idle. Our solution also supports accessing all historical data for newly joined nodes through a snapshot mechanism. The solution is implemented based on the Hyperledger Fabric (HLF). Experiments show that our solution reduces the block data for blockchain nodes by 93.3% compared to the original HLF and that our advanced solution enhances the TPS by 9.6% compared to our primary solution.

Blockchain Consensus Mechanism Based on Improved Distributed Consistency and Hash Entropy

To improve the performance for distributed blockchain system, a novel and effective consensus algorithm is designed in this paper. It firstly constructs a more random additive constant through the generation matrix of the error correction code and uses the value of the hash entropy to prove that the constructed hash function can meet the requirements of high throughput and fast consensus in performance. In addition, a distributed consensus coordination service system is used in the blockchain system to realize the synchronization of metadata and ensure the consistency of block data, configuration information, and transaction information. The experiment results show that our proposed strategy can reduce the waste of computing resources, increase the block generation speed, and ensure the fairness of nodes participating in the competition, which is an effective solution to ensure the stable operation of the blockchain system.

713 Wide-Awake Local Anaesthesia No Tourniquet (WALANT) Procedures During COVID-19: A Single Centre Experience

Aim WALANT procedures are becoming more popular and are particularly useful in the COVID-19 pandemic. Procedures can be performed without needing access to general theatres and anaesthetic support, minimising the number of patient-healthcare interactions and avoiding aerosolisation. Our unit has taken this approach and aim to present a case series that demonstrates the efficacy and safety of WALANT. Method A retrospective analysis of WALANT cases in a single plastic surgery centre during March-August 2020 was performed. All procedures using a WALANT approach were included, that would have otherwise required general anaesthetic or regional block. Data was collected on a number of variables, including patient satisfaction. Results 37 procedures were included in analysis. The majority of the injuries consisted of hand trauma. There were no cases of post-operative complications, although one required completion in main theatres due to technicality. No patients required additional anaesthetic during the procedure and all reported pain score as 0/10. Overall patient satisfaction was 10/10 for 26 patients, 9/10 for 10 patients and 7/10 for one patient. Conclusions Results show the use of WALANT can facilitate an effective plastic surgery trauma service during COVID-19. Most of the procedures were performed in the outpatient department setting, without the need for main operating theatres or anaesthetic support. All procedures were performed within 24 hours of initial presentation and were able to be discharged on the same day. In addition, patient satisfaction remained high and post-operative complications were minimal. We propose that the use of WALANT should continue and increase beyond the current pandemic.

The Security of a Blockchain-Based File System in a Software Defined Network Framework

Developing distributed form of file security systems using Blockchain technology. Based on the idea of cloud storage as it is a leading storage technology for huge data storage. Blockchain is one of the trending technology for decentralized data storage systems that ensures privacy, confidentiality, data security, authentication, and integrity. As SDN network provides support to have various nodes in the network for the secure transaction of data from source to destination. Blockchain helps in keeping track of block data by constructing the gateway to make it immutable. BCFS refers to Blockchain-Based File System Security in SDN. In the designed system, a Web-Based Interface is developed an authorized entity can upload file data the user’s file is projected to encryption process and the block data is shared among the various nodes in the network. Along with Unique Document ID, encrypted random key, and hash data. This hash data value holds the file path and preserves in the blockchain into their corresponding block data folders. Detection of node failure across the network an automatic short path is chosen by the network and detection of an attack based on entropy value.

Understanding Block and Transaction Logs of Permissionless Blockchain Networks

Public blockchain records are widely studied in various aspects such as cryptocurrency abuse, anti-money-laundering, and monetary flow of businesses. However, the final blockchain records, usually available from block explorer services or querying locally stored data of blockchain nodes, do not provide abundant and dynamic event logs that are only visible from a live large-scale measurement. In this paper, we collect the network logs of three popular permissionless blockchains, that is, Bitcoin, Ethereum, and EOS. The discrepancy between observed events and the public block data is studied via a noble analysis model provided with the soundness of measurement. We share our key findings including a false universal assumption of previous mining-related studies and the block/transaction arrival characteristics.

Immutability of Distributed Hash Model on Blockchain Node Storage

The blockchain system uses hash functions. Hash is used in the blockchain to mark each block of data. Hash function algorithms map a string that is usually hexadecimal of any size to a sequence of fixed-size bits. This journal will discuss the distributed hash model for immutable blockchain node storageThe methodology used in the preparation of this research is mind mapping and literature review, namely the collection of scientific journals, articles and ebooks. Storage of nodes on the blockchain using a distributed hash model. The distributed hash model only stores a portion of the block data at each node, and the block data is taken as a resource. A hash connects each block with the previous on the blockchain, so the entire blockchain transaction cannot be changed or deleted. For further research will expand the research topic regarding storage immutability on the blockchain so that it becomes more complete and detailed.