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Sales and purchase agreements that occur electronically between sellers and buyers create online buying and selling. Internet and social media users in Indonesia, online E-Commerce businesses are increasingly growing. E-Commerce is business activities involving consumers, manufacturers, service providers and intermediaries using computer networks, namely the internet. E-Commerce users are also of various ages, because there are many conveniences when shopping online, just open the desired E-Commerce application, choose the items you buy and the goods arrive as desired within a few days. The increasing number of online buying and selling has indirectly influenced changes in legal regulations. The rules that apply in Indonesia are still unclear regarding electronic buying and selling. This is due to the fact that the conditions necessary for the validity of an electronic agreement have not been specifically regulated. The aim of this research is to determine the validity of electronic contract agreements in E-Commerce transactions in terms of civil law. In this research, normative research methods were used. This method involves processing data from legal regulations and applying rules or norms as the basis for research. Research results Electronic documents are binding and recognized as valid evidence to provide legal certainty regarding the operation of electronic systems and electronic transactions, especially for proof and related to legal actions carried out through electronic systems

The PKM team with partners from Umbul Helau developed the concept of urban farming with aquaponics technology where hydroponic plant cultivation and integrated fish cultivation in the form of budikdamber. The activity purpose is to build the concept and introduce it to the community. The method used is ABCD (Asset Based Community Development), focusing on land assets owned by partners to be developed by building this urban farming activity. The stages are carried out starting from the time planning,, division of tasks, provision of materials, land preparation and cultivation of budikdamber media, seed distribution, control and evaluation. The results obtained are very encouraging where the plant has been harvested and with packaging that is sold and has economic value, catfish is growing and will harvest in the near future. In addition, education about this concept introduces to the elementary school (SD) students and teachers with a positive response.  

Traditional family medicinal plants or herbs or often abbreviated as Toga, are very beneficial for health and when planted around the house create a beautiful environment. Currently, people prefer to use chemical-based medicines for several reasons, including: the first is the lack of knowledge about medicinal plants, the second is the limited land for growing family medicinal plants, third, the lack of information dissemination about family medicinal plants on easily accessible media. or informative to citizens.From some of the problems above, we can draw the main points of the problems that are discussed and this writing tries to find ways to provide education to the community in terms of the types of family medicinal plants, as well as the design and implementation of the construction of the toga garden.The scope of this paper is related to the author's discipline, namely in the architectural realm and takes a case study on an empty land next to a security post located in RT 08, RW V, Sumurboto Village, Banyumanik District, Semarang.The purpose of writing related to knowledge of the types of family medicinal plants, toga garden designs and their implementation are: first so that people know about the types and benefits of family medicinal plants, second so that people understand the importance of family medicinal plants for health, third so that people maximize and utilize the land. that exist in their respective environments.

Starting from the development of medical technology that is increasingly sophisticated and rapidly growing,researchers conduct medical research, namely about patient infusion handling services. In handling patient infusion, currently it is still manual which is carried out by nurses / medical personnel. Infusion handling services for patients still have shortcomings, namely the process of monitoring and replacing infusion fluids which are often late. If the problem is not treated quickly, it can lead to problems, namely the presence of air embolism in the blood vessels (the entry of foreign objects into the blood vessels, for example air). From that problem, the researchers made a new innovation in medical technology in handling infusions automatically and based on IoT. In this study, the smart online infusion device that has been made has good features and is very effective in handling infusions. This device has 3 main functions, namely: it can monitor the remaining infusion, it can change the infusion fluid automatically and it can indicate a blocked patient's infusion. This device already has a method for processing data with fuzzy logic. Media monitoring has been supported by a website that can be controlled remotely and in real time. Tests have been carried out and the effectiveness of the system is found to have an error rate of 0.2% - 0.7% and has an accuracy of 98%. Thus this tool can be used in terms of handling patient infusion automatically.

Oyster Mushroom (Pleurotus ostreatus) is one of the commercially edible mushrooms, has high economic value and is prospective as a source of income for farmers. Along with the increasing demand for oyster mushrooms, business opportunities for oyster mushrooms have promising prospects. Based on this, it is necessary to provide counseling and assistance for the production of Oyster Mushroom cultivation in Jambesari Village. The purpose of this service program is through education and demonstrations on how to manufacture and process mushroom growing media (baglog), sterilize mushroom growing media inoculate mushroom seeds into baglog, maintenance, harvesting and packaging in order to build an oyster mushroom cultivation business to improve the community's economy and make it as a superior product. The results of community service in counseling and assisting in oyster mushroom production are: 1). Partners are able to make oyster mushroom growing media by utilizing organic waste which is abundant, cheap and easy to obtain from the surrounding environment, namely sawdust so that sengon wood waste can be utilized so that it can make the environment cleaner and free of waste. 2). Cadres/target groups have expertise in oyster mushroom cultivation. 3). Increasing public knowledge that oyster mushroom products can be used to add nutrition or menus can also increase family income.