The outbreak of COVID-19 has already generated a huge societal, economic and political losses worldwide. The present study aims to investigate the antiviral activity of Poly(hexamethylene biguanide) hydrochloride (PHMB) treated fabric against COVID-19 by using the surrogate Feline coronavirus. The antiviral analysis indicated that up to 94% of coronavirus was killed after contacting the CVC fabric treated with PHMB for 2 h, which suggests that PHMB treated fabric could be used for developing protective clothing and beddings with antiviral activity against coronavirus and can play a role in fighting the transmission of COVID-19 in the high-risk places.

The spread of COVID-19 has brought about huge losses around the world. This study aims to investigate the applicability of PHMB used for developing antiviral spandex clothing against coronavirus. PHMB was qualitatively determined on the surface of spandex fabrics by using BPB. The antiviral analysis shows that the PHMB-treated spandex fabric can kill 99% of the coronavirus within 2 h of contact, which suggests that the spandex fabric treated with PHMB could be used for developing antiviral clothing against coronaviruses for containing the transmission of COVID-19 in high-risk places. Furthermore, PHMB-treated spandex fabrics were shown excellent antibacterial activity against gram-positive S. aureus and gram-negative K. pneumoniae. The hand feel properties of Spandex fabric were not significantly affected by the PHMB coating in addition to the wrinkle recovery, which was obviously improved after PHMB coating.

IOTA is a typical blockchain designed for IoT applications. The Markov chain monte carlo algorithm (MCMC) used in IOTA may lead to a large number of unverified blocks, which increases transaction delay to a certain extent. We propose a Stable matching algorithm (SMA) based on matching theory to stimulate nodes to verify blocks, thereby reducing the number of unverified blocks and the consensus delay. The structure of our IoT blockchain uses the Directed acyc1ic graph (DAG) to improve the transaction processing capability. The nodes in the network are abstracted as transaction issuers and transaction verifiers. A verification service scheduling system is used to assign transactions to the verifiers and achieve the optimal matching. We designed a trust evaluation mechanism which offers verifiers references and awards to check transactions. The simulation results show that SMA can significantly reduce the number of orphan blocks and improve the transaction throughput, which helps to improve the reliability of the IoT blockchain.

AbstractIn the modern world, psychological problems like anxiety and depression are common phenomena in society. Dharma therapy is a Buddhist teaching-based therapeutic intervention which utilizes the Buddhist model of ending suffering to help clients to deal with psychological issues. In many cases, it has been shown to be effective. The present case study illustrates how the client, Mr. Peter Chan, who was suffering from anxiety, benefited from going through the intervention of Dharma Therapy. The article will describe what is Dharma Therapy, Mr. Chan’s psychological issues and how the seven steps of Dharma Therapy helped Mr. Chan to deal with his sufferings. Psychological tests administered before and after the therapeutic intervention showed improvement in all aspects of anxiety.

The current COVID-19 pandemic has reduced the stability of education in Indonesia, currently face-to-face learning is prohibited, causing learning to be impossible. If this situation continues, education will experience a slump. This situation is a very crucial problem in the world of education that really needs to be handled. In overcoming educational problems during the COVID-19 pandemic, there is a need for learning innovations that can be carried out so that education can be sustainable and the potential of children can continue to develop, including at RA Perwanida Wonosobo.
 This study uses a classroom action approach about zoom video meetings as a means of blended learning to improve early childhood learning at RA Perwanida. The results of classroom action research that have been carried out at RA Perwanida Wonosobo are: 1). The activity of children in learning zoom meeting as a means of blended learning in the first cycle was 69% and increased to 89% in the second cycle. 2). Completeness of children in the first cycle is 67% and in the second cycle is 86% based on the results in cycle I and cycle II, we can conclude that learning through zoom video meetings as a means of blended learning can improve early childhood learning at RA Perwanida.
 Keywords: zoom video meeting; blended learning.

High frequency bearing currents are a parasitic phenomenon that affects inverter-fed induction machines, causing damage and wear to the mechanical bearings, which might lead to unexpected failures, increase of the machine downtime and reduction of its lifespan. This paper describes how the bearing currents are affected by changes in the components of the electrical circuit that feeds the induction machine. The referred system consists of: Two-level voltage source inverter, different passive filters (a) common-mode ring filter, b) common-mode ring filter with small phase-to-ground capacitances, c) differential mode filter, d) dual-mode filter and e) du/dt-filter), different motor supply cables (shielded vs. unshielded cables with lengths of 50 m, 150 m or 300 m) and the two different induction motors (rated power of 11 kW and 15 kW, respectively). So, in total sixty system arrangements were tested. The highest reduction of bearing currents was measured with the dual-mode filter in all cable configurations.

In the realm of cognitive development of early childhood 4-5 years or group A there are indicators of the level of development achievement pairing or connecting letters of the alphabet both the components of vowels and consonants in English. The English alphabet for early childhood is something that is newly known, or just seen and heard so that the need to recognize letters of the alphabet in an interesting and fun way.To help introduce and understand the letters of the alphabet and be arranged into words in English in Group A RA Perwanida Wonosobo, located on Jalan Tumenggung Jogonegoro No. 37 Our Wonosobo uses a game technique called the "Flying Horse Jump" GameThe game technique "Flying Horse Jump" uses a simple tool made from used banners as the base of the game that is drawn according to the desired pattern and given the letters of the alphabet along with how to pronounce each pattern. The purpose of making this article is to provide references and input to teachers, guardians of students and the wider community so that the presentation of subject matter, especially basic English introduction material for kindergarten students is packaged creatively, innovatively and on target. The benefits are that it can be used as a teacher's reference to stimulate student enthusiasm and motivation in learning, and can be used as an alternative for parents of students to make appropriate, practical and logical ways in providing understanding to students relating to the introduction of the letters of the alphabet in basic English during this pandemic.

Testing procedure can be described by the testing and test control notation-version 3(TTCN-3). The automatic execution of TTCN-3 test scripts is transformed to automatic testing of system under test (SUT). We propose a framework, which uses combined symbolic and concrete execution of TTCN-3 test scripts to automatically generate test inputs for most of the feasible paths. Meanwhile most of the test procedures are accomplished automatically, which can reduce testing cost and better testing effectiveness. Structured values and function calls are the common difficult problems in symbolic execution. We propose a lazy symbolization mechanism to decrease the amount of symbolic values when structured values are processed. And we also propose combined condition and assignment statements to describe functions. We apply our framework to some public fragments of TTCN-3 test scripts. The results are encouraging.