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CHARACTERICTION OF ON-DEMAND SERVICES 按需服务的特征
Cilvēks. Vide. Tehnoloģijas Pub Date : 2023-10-30 DOI: 10.17770/het2023.27.7370
Jānis Edijs Ežmalis, Lienīte Litavniece, Sergejs Kodors
{"title":"CHARACTERICTION OF ON-DEMAND SERVICES","authors":"Jānis Edijs Ežmalis, Lienīte Litavniece, Sergejs Kodors","doi":"10.17770/het2023.27.7370","DOIUrl":"https://doi.org/10.17770/het2023.27.7370","url":null,"abstract":"The purpose of on-demand services is to allow customers to instantly request and receive service as needed, anywhere, anytime. It is fundamentally different from regular services. Novadays people are busier than ever and therefore prefer on-demand services for their daily activities and tasks. In addition, they expect an extremely fast response to their service requests and delivery of products/services. For this reason, on-demand service apps have gained increasing appeal among people since the last decade. The aim of the study is to describe the most characteristic features of on-demand services. Research tasks: (1) provide a general description of on-demand services; (2) describe the on-demand service business model; (3) provide on-demand service application characteristics.","PeriodicalId":472464,"journal":{"name":"Cilvēks. Vide. Tehnoloģijas","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136067575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
ENERGY EFFICIENCY OF BUILDINGS TODAY 当今建筑的能源效率
Cilvēks. Vide. Tehnoloģijas Pub Date : 2023-10-30 DOI: 10.17770/het2023.27.7376
Līga Šmate, Arturs Cūkmačs, Staņislavs Pleikšnis
{"title":"ENERGY EFFICIENCY OF BUILDINGS TODAY","authors":"Līga Šmate, Arturs Cūkmačs, Staņislavs Pleikšnis","doi":"10.17770/het2023.27.7376","DOIUrl":"https://doi.org/10.17770/het2023.27.7376","url":null,"abstract":"Nowadays, we hear the words energy efficiency and zero energy building more and more often. The concept of zero-energy building and energy-efficient building is becoming the goal of building design. Sustainable construction, which includes proper methods, materials, technologies, can ensure environmentally friendly use of natural resources and mitigation of global warming. Construction is an industry that does not stand still and almost all the time we see the construction of new buildings, the renovation of existing buildings, etc., but do these buildings meet modern standards? The authors will perform the necessary calculations to find out to what extent a real construction object meets modern requirements and how the energy efficiency of this object could be further improved.","PeriodicalId":472464,"journal":{"name":"Cilvēks. Vide. Tehnoloģijas","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136068392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
TRAINING OF A CONVOLUTIONAL NEURAL NETWORK FOR HAND GESTURE RECOGNIZING ON THE KAGGLE ASL ALPHABET DATASET 基于kaggle asl字母数据集的卷积神经网络手势识别训练
Cilvēks. Vide. Tehnoloģijas Pub Date : 2023-10-30 DOI: 10.17770/het2023.27.7377
Gļebs Vituškins, Sergejs Kodors
{"title":"TRAINING OF A CONVOLUTIONAL NEURAL NETWORK FOR HAND GESTURE RECOGNIZING ON THE KAGGLE ASL ALPHABET DATASET","authors":"Gļebs Vituškins, Sergejs Kodors","doi":"10.17770/het2023.27.7377","DOIUrl":"https://doi.org/10.17770/het2023.27.7377","url":null,"abstract":"Nowadays, hand gesture recognizing is important topic. It is used in virtual assistant work, for sign language translation, in virtual and augmented reality applications, and in entertainment services. The paper deals with the convolutional neural network training using different technologies. The neural network is trained to classify American manual alphabet and 3 extended gestures using photographs. The open access dataset Kaggle ASL Alphabet was used for training. Kaggle ASL Alphabet provides 87000 images of 29 classes for image classification and hand gesture recognizing.","PeriodicalId":472464,"journal":{"name":"Cilvēks. Vide. Tehnoloģijas","volume":"167 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136102306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
DATABASE USAGE IN SEMANTIC ONTOLOGIES 语义本体中的数据库使用
Cilvēks. Vide. Tehnoloģijas Pub Date : 2023-10-30 DOI: 10.17770/het2023.27.7378
Daniēls Zeps, Imants Zarembo, Sergejs Kodors
{"title":"DATABASE USAGE IN SEMANTIC ONTOLOGIES","authors":"Daniēls Zeps, Imants Zarembo, Sergejs Kodors","doi":"10.17770/het2023.27.7378","DOIUrl":"https://doi.org/10.17770/het2023.27.7378","url":null,"abstract":"Semantic ontology languages are a way for experts to write down their knowledge in a commonly accepted way, it allows information to be understood by humans and machines. However, ontology tools do not provide the ability to use this data in a database for geodata-based analysis easily. The project is focused on ontology web language (OWL) usage for web content generation for business-to-business communication using geodata analysis. This specific paper is focused on selecting a database that could support the ontology tools. In the research scope, different databases were checked (relationship, document, and graph databases). In conclusion, graph databases were the most similar to the structure of the ontology, so it was chosen to use Neo4j as the database.","PeriodicalId":472464,"journal":{"name":"Cilvēks. Vide. Tehnoloģijas","volume":"174 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136067729","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
AUTONOMOUS UNMANNED DRONES FLIGHT PLANNING, USING A MODIFIED SHORTEST PATH ALGORITHM WITH A LIMITED TIME FRAME 自主无人驾驶飞机的飞行规划，使用改进的最短路径算法与有限的时间框架
Cilvēks. Vide. Tehnoloģijas Pub Date : 2023-10-30 DOI: 10.17770/het2023.27.7375
Marks Sondors, Ilmārs Apeināns, Sergejs Kodors
{"title":"AUTONOMOUS UNMANNED DRONES FLIGHT PLANNING, USING A MODIFIED SHORTEST PATH ALGORITHM WITH A LIMITED TIME FRAME","authors":"Marks Sondors, Ilmārs Apeināns, Sergejs Kodors","doi":"10.17770/het2023.27.7375","DOIUrl":"https://doi.org/10.17770/het2023.27.7375","url":null,"abstract":"The aim of this work is to develop an algorithm to find the shortest path for drone flight planning with a limited time frame. Author used the local search shortest path algorithm to find the most efficient algorithm to use for further modification to apply to a drones flight calculation. The algorithm was modified to use the distance between points as a unit of time to limit the flight path length depending on the drone's maximum flight time. As a result of the work, an algorithm was created which, upon receiving an array of points, finds the shortest distance between the points, but when it reaches the limit of the flight duration, it returns to the drone station to charge, and resumes flight once it’s done charging.","PeriodicalId":472464,"journal":{"name":"Cilvēks. Vide. Tehnoloģijas","volume":"308 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136067731","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
TRAINING OF YOLOV5 NEURAL NETWORK FOR PEAR DETECTION IN ORCHARD yolov5神经网络在果园梨检测中的训练
Cilvēks. Vide. Tehnoloģijas Pub Date : 2023-10-30 DOI: 10.17770/het2023.27.7371
Artis Fribergs, Edmunds Lukaševics, Guntis Lielbārdis, Sergejs Kodors
{"title":"TRAINING OF YOLOV5 NEURAL NETWORK FOR PEAR DETECTION IN ORCHARD","authors":"Artis Fribergs, Edmunds Lukaševics, Guntis Lielbārdis, Sergejs Kodors","doi":"10.17770/het2023.27.7371","DOIUrl":"https://doi.org/10.17770/het2023.27.7371","url":null,"abstract":"A fruit-growing is an important branch of agriculture for various reasons. Fruits provide essential nutrients and vitamins to our diet, and they are also a significant source of income for fruit-growers. To improve the efficiency of fruit cultivation, we trained a pear detection neural network with YOLOv5 architecture using a dataset from the project lzp-2021/1-0134. The dataset contained 1273 photographs of pear trees with image sizes 640x640px. We had trained the neural network model YOLOv5m five times and achieved the best result equal to mAP@0.5 0.8 and mAP@0.5:0.95 0.43. The use of artificial intelligence in fruit cultivation can help to optimize the planning of fruit picking, contributing to the precision horticulture.","PeriodicalId":472464,"journal":{"name":"Cilvēks. Vide. Tehnoloģijas","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136068260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
COMPARISON OF SILAGE COMPOSITIONS OBTAINED FROM SOWN GRASSES AND NATURAL MEADOW GRASS IN FARM BĒRZI AND FARM LAIMĪTES 农场bĒrzi和农场laimĪtes播种草与天然草甸草青贮成分的比较
Cilvēks. Vide. Tehnoloģijas Pub Date : 2023-10-30 DOI: 10.17770/het2023.27.7372
Vilma Kolneja, Inese Cimermane, Marlinda Kaša
{"title":"COMPARISON OF SILAGE COMPOSITIONS OBTAINED FROM SOWN GRASSES AND NATURAL MEADOW GRASS IN FARM BĒRZI AND FARM LAIMĪTES","authors":"Vilma Kolneja, Inese Cimermane, Marlinda Kaša","doi":"10.17770/het2023.27.7372","DOIUrl":"https://doi.org/10.17770/het2023.27.7372","url":null,"abstract":"The paper deals with the methods of improving animal husbandry feed rations in two different farms. Forage quality in herd has enormous impact on methane production all over the world, so it is important to find ways to decrease these numbers and also increase the productivity of the whole herd. As a result of research, the chemical composition of the different kind silage of sown grasses and natural meadows will be clarified and proposals are developed for improvement the quality of feed for herd productivity increase.","PeriodicalId":472464,"journal":{"name":"Cilvēks. Vide. Tehnoloģijas","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136070272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
ADHESION TEST ON DIFFERENT WORK SURFACES 不同工作表面的附着力测试
Cilvēks. Vide. Tehnoloģijas Pub Date : 2023-10-30 DOI: 10.17770/het2023.27.7374
Justs Batņa, Rihards Misjuns, Ritvars Rēvalds
{"title":"ADHESION TEST ON DIFFERENT WORK SURFACES","authors":"Justs Batņa, Rihards Misjuns, Ritvars Rēvalds","doi":"10.17770/het2023.27.7374","DOIUrl":"https://doi.org/10.17770/het2023.27.7374","url":null,"abstract":"Šī publikācija parāda adhēzijas rezultātus, veicot to uz vairākām darba virsmām. Tika izmantotas 6 darba virsmas un veikti 18 adhēzijas testi, uz katras darba virsmas - 3 testi. Testu veikšanai uz darba virsmām tika printēti 20x20x10mm četrstūri no PETG plastmasas, izmantojot 3D printeri Ender 3 Pro. Adhēzijas testi veikti ar Zwick/Roell Z150 elektromehāniskās stiepes un kompresijas pārbaudes iekārtu.","PeriodicalId":472464,"journal":{"name":"Cilvēks. Vide. Tehnoloģijas","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136067593","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
MATHEMATICAL MODELING OF DIFFUSION BOUNDARY PROBLEMS WITH PERIODIC BOUNDARY CONDITIONS USING MATLAB AND C++ FOR NUMERICAL AND ANALYTICAL SOLUTIONS 具有周期边界条件的扩散边界问题的数学建模，使用matlab和c++进行数值和解析求解
Cilvēks. Vide. Tehnoloģijas Pub Date : 2023-10-30 DOI: 10.17770/het2023.27.7373
Edmunds Lukaševičs, Ilmārs Kangro
{"title":"MATHEMATICAL MODELING OF DIFFUSION BOUNDARY PROBLEMS WITH PERIODIC BOUNDARY CONDITIONS USING MATLAB AND C++ FOR NUMERICAL AND ANALYTICAL SOLUTIONS","authors":"Edmunds Lukaševičs, Ilmārs Kangro","doi":"10.17770/het2023.27.7373","DOIUrl":"https://doi.org/10.17770/het2023.27.7373","url":null,"abstract":"The article examines a second-order parabolic partial differential equation of a three-dimensional (3D) non-stationary boundary problem with constant diffusion coefficients and periodic boundary conditions in the x and y directions. The method for reducing the (3D) non-stationary boundary problem to the corresponding one-dimensional (1D) non-stationary boundary problem using periodic boundary conditions in the x and y directions is discussed. The stationary (analytical) solution of the obtained (1D) stationary boundary problem is also obtained. The numerical solutions of the 1D boundary problem are obtained using the Matlab package \"pdepe\" and the C++ programming language. As a practical application of the developed mathematical model, the article discusses calculating the concentration of heavy metal Ca in a peat layer based on the obtained experimental data (measurements).","PeriodicalId":472464,"journal":{"name":"Cilvēks. Vide. Tehnoloģijas","volume":"82 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136070076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
BLASTING MACHINE 爆破机
Cilvēks. Vide. Tehnoloģijas Pub Date : 2023-01-09 DOI: 10.17770/het2022.26.6957
Gatis Tutins, Ritvars Rēvalds
{"title":"BLASTING MACHINE","authors":"Gatis Tutins, Ritvars Rēvalds","doi":"10.17770/het2022.26.6957","DOIUrl":"https://doi.org/10.17770/het2022.26.6957","url":null,"abstract":"Skrotēšanas iekārtas atrodas katrā lielā metālapstrādes uzņēmumā, tās nepieciešamas, lai efektīvi varētu attīrīt tērauda detaļas, un pēc attīrīšanas kvalitatīvi veikt krāsošanas darbus. Skrotēšanas iekārta ievērojami uzlabo detaļu apstrādi un to kvalitāti. Tomēr reti kurš aizdomājas par to, kā optimizēt noskrotēto detaļu kvalitātes uzraudzību, īpaši ziemā kad kļūst vēsāks un ir nepieciešams uzraudzīt skrotēšanas telpas temperatūru, mitrumu un rasaspunktu. Tāpēc šī izpēte ir vērsta uz to, lai noskaidrotu cik liela skrotēšanas ietekme ir uz materiālu, kādi ir skrotēšanas veidi un tehnoloģijas, un kādu ietekmi uz noskrotēto materiālu atstāj temperatūras svārstības skrotēšanas iekārtas telpā. Tiks aprakstīts kādus uzlabojumus varētu veikt skrotēšanas iekārtai, kādēļ šie uzlabojumi ir nepieciešami un ar kādām komponentēm uzlabojumi tiktu panākti.","PeriodicalId":472464,"journal":{"name":"Cilvēks. Vide. Tehnoloģijas","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135013940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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