Internet of Things as an element of the frost protection system in orchards

Frosts cause serious damage to fruit and vegetable crops. In Poland, temperature decreases, and the occurrence of inflow (advective) frosts most often fall during the flowering period, i.e., in a phase extremely important for the development of the plant. For orchards, this causes the inflorescences of early flowering trees (cherries, plums and certain varieties of apple and pear trees) to freeze. A modern idea for reducing frost losses in orchards is to heat the air with mobile heaters. Protection by these machines consists of passing using an agricultural tractor in rows of trees or shrubs and heating and mixing the air. The problem that farmers may encounter during frosts is the awareness of when exactly such a weather condition occurs in their orchard. Weather forecasts are not detailed and usually apply to the entire region. Dangerous temperature declines below the critical minimum can occur locally and are also conditioned by geographical location and terrain diversity. The aim of the article is to present a measuring system that allows the construction of an individualised temperature model taking into account the unique shape of the orchard surface. The system is made in Internet of Things technology using long-range radio communication protocol LoRaWAN. Data from distributed measurement sensors are processed on a network server and displayed as a final application. The task of the system is to monitor the current situation in the orchard and to notify the farmer of the need to initiate a protective procedure. The operation of the system also supports the efficient use of mobile heating machines. The system facilitates the location of the areas in the orchard with the lowest temperature, as well as provides feedback on temperature changes inside the treetops caused by the passage of the mobile heater.

SISTEM INFORMASI PELAYANAN SIM

The driving license administration service system is a special service provided by Nasional Police to people who want to make a SIM. This service system can be done online. The current application has made it a lot easier in the process of making up the SIM card production. However, there are some problems related to internal reports that must be reported because the service is not yet available in an existing application, so some recapitulation processes are still done conventionally and technical constraints on the server network. This study aims to create a service management information system application (SIMPEL SIM) that can provide solutions to internal reporting and server network technical constraints. The method used software development is waterflow. This application handles the printing of bank payment receipts automatically, granting the applicant's registration number automatically, printing the SIM application form on the form provided. Verification of the completeness of the file, validation of the score of the theory test, practice 1 and practice 2, validation of sim issuance and printing of temporary sim numbers if there is a technical problem in the existing network server. The use of the SIMPEL SIM application makes it easy to recapitulate internal reporting and can improve public services.

Elastic Performance Test Method of Web Server in Cloud Computing Environment

In the process of traditional web server elastic performance test, the performance of tracking data is poor, which leads to excessive server jitter and poor accuracy of elastic test results. Therefore, this paper studies the network server elastic performance test method in cloud computing environment. In this method, cloud monitoring technology is used to track the operation data of Web server. According to the multi platform call mode of Web server, a statistical regression model is established to determine the elasticity measurement index. The load balancing algorithm is used to test the server load balancing to obtain the elasticity value of Web server. Experimental results: in the whole running period of Web server, the jitter times of the proposed method are 15.6066 times, 16.5600 times and 16.5733 times lower than those of the three traditional methods, respectively. It can be seen that the new test method can accurately track the response ability of the server and obtain more accurate elasticity value.

Perancangan Sistem Keamanan File Transfer Protocol Dengan Secure Socket Layer Pada Server Centos 7

An advancement in communication technology currently has an influence on developments in data management in the joints of life, making the need for a media center something a must in digital archive storage. Data will not always be stored in personal computers, but it would be better if there was a centralized data container to be a solution in storage media, in order to prevent data loss or data backup. The term network (network) is used when there are at least two or more devices that are connected to one another. To carry out data exchange in this network, a protocol is used that specifies how data is exchanged, and one of the most widely used protocols is the File Transfer Protocol (FTP). FTP is generally useful as a means of exchanging files or data in a network. The FTP protocol is not secure enough, because when data transfer there is no security to protect it. Therefore the FTP protocol is necessary for additional security, by implementing the SSL security protocol or Secure Socket Layer Security protecting the FTP protocol during data transfer. SSL certificates are used for the purpose of handling the security of data packets transmitted over the network system. When SSL is activated, the server and client when the connection occurs will be encrypted so that the data cannot be seen by others. Keywords: FTP; Network; Server; SSL Abstrak: Suatu Kemajuan teknologi komunikasi saat ini memiliki pengaruh terhadap perkembangan didalam pengelolaan data didalam sendi kehidupan, membuat kebutuhan akan media center menjadi sesuatu yang harus dalam penyimpanan arsip digital. Data tidak selamanya akan tersimpan di dalam personal computer saja tetapi akan lebih baik jika ada wadah data terpusat menjadi solusi dalam media penyimpanan, agar menjaga dari kehilangan data atau cadangan data. Istilah jaringan (network) dipakai apabila terdapat minimal dua atau lebih perangkat yang terhubungkan satu dengan yang lainnya. Untuk melaksanakn pertukaran data didalam jaringan ini, digunakan protocol yang menspesifikasikan bagaimana data dipertukarkan, dan salah satu protocol yang banyak digunakan adalah File Transfer Protocol (FTP). FTP umumnya bermanfaat sebagai sarana pertukaran file atau data dalam suatu network. Protokol FTP tidaklah cukup aman, dikarenakan ketika transfer data tidak ada keamanan untuk melindunginya. Maka dari itu protokol FTP perlu untuk penambahan keamanan, dengan menerapkan protokol keamanan SSL atau Secure Socket Layer Security melindungi protokol FTP pada saat transfer data. Sertifikat SSL dimanfaatkan untuk keperluan menangani keamanan paket data yang ditransmisikan melalui sistem jaringan. Ketika SSL diakatifkan, maka server dan client ketika terjadi koneksi akan ter enkripsi sehingga data yang ada tidak dapat untuk dilihat oleh orang lain. Kata kunci: FTP;Network; Server; SSL

A LoRa-Based Mesh Network for Peer-to-Peer Long-Range Communication

LoRa is a long-range and low-power radio technology largely employed in Internet of Things (IoT) scenarios. It defines the lower physical layer while other protocols, such as LoRaWAN, define the upper layers of the network. A LoRaWAN network assumes a star topology where each of the nodes communicates with multiple gateways which, in turn, forward the collected data to a network server. The main LoRaWAN characteristic is the central role of the gateways; however, in some application scenarios, a much lighter protocol stack, relying only on node capabilities and without the presence of gateways, can be more suitable. In this paper, we present a preliminary study for realizing a LoRa-based mesh network, not relying on LoRaWAN, that implements a peer-to-peer communication between nodes, without the use of gateways, and extends node reachability through multi-hop communication. To validate our investigations, we present a hardware/software prototype based on low-power-consumption devices, and we preliminarily assess the proposed solution.

The Analysis of lncRNA-miRNA-mRNA Competitive Endogenous RNA Network to Identify 4-lncRNA Signature Related to the Prognosis of Bladder Cancer

BackgroundBladder cancer (BLCA) is one of the leading causes of cancer deaths in the world, and the molecular mechanism of its pathogenesis is very complicated. Long non-coding RNA (lncRNA) can interact with microRNA (miRNA) through the mechanism of competitive endogenous RNA (ceRNA), and affect the expression of Messenger RNA (mRNA), and affect the pathogenesis of bladder cancer. This study aims to construct the ceRNA-regulated bladder cancer network related to lncRNA and identify a novel lncRNA signature related to the survival prognosis of patients with bladder cancer. It was validated in GEPIA's online bioinformatics network server assists. MethodsThe RNA sequencing data of normal and adjacent bladder cancer tissues are from the Cancer Genome Atlas (TCGA). We identify differentially expressed (DE) genes by comparing gene expression between normal tissues and tumors in the TCGA dataset. Construct a ceRNA network and explore potential biological markers. Based on the ceRNA network, univariate regression analysis and multivariate regression analysis were used to screen out the lncRNA related to the overall survival (OS) of bladder cancer. It was validated in GEPIA's online bioinformatics network server assists. Receiver operating characteristic curve (ROC) analysis was used to evaluate the prognostic value of the risk score.ResultsWe screened out 666 lncRNAs, 160 microRNAs (miRNAs), and 1,820 Messenger RNAs (mRNAs) by comparing normal bladder cancer tissues and adjacent tissues (P<0.05). Then, we constructed a ceRNA regulatory network containing 44 DElncRNA, 22 DEmiRNA, and 52 DEmRNA. The survival analysis of differential genes in the ceRNA network identified 9 lncRNAs, 8 miRNAs, and 12 mRNAs that are associated with the prognosis of BLCA. Cox regression analysis of 9 LncRNAs related to the prognosis of bladder cancer showed that 4 lncRNAs (AC078778.1, ADAMTS9-AS1, ADAMTS9-AS2, and NAV2-AS2) can be independently used as prognostic markers of bladder cancer.ConclusionsBased on the construction of the bladder cancer ceRNA network, a new prognostic signature of four lncRNA-based has been discovered. It will help to better understand the mechanism of bladder cancer occurrence, development and metastasis, and provide direction for future research.

Location-sharing protocol for privacy protection in mobile online social networks

Location-based services are becoming more and more popular in mobile online social networks (mOSNs) for smart cities, but users’ privacy also has aroused widespread concern, such as locations, friend sets and other private information. At present, many protocols have been proposed, but these protocols are inefficient and ignore some security risks. In the paper, we present a new location-sharing protocol, which solves two issues by using symmetric/asymmetric encryption properly. We adopt the following methods to reduce the communication and computation costs: only setting up one location server; connecting social network server and location server directly instead of through cellular towers; avoiding broadcast encryption. We introduce dummy identities to protect users’ identity privacy, and prevent location server from inferring users’ activity tracks by updating dummy identities in time. The details of security and performance analysis with related protocols show that our protocol enjoys two advantages: (1) it’s more efficient than related protocols, which greatly reduces the computation and communication costs; (2) it satisfies all security goals; however, most previous protocols only meet some security goals.

Tools for automated collection and analysis of sociological information on the territorial identity of city residents

The paper proposes an algorithm for automated search and initial analysis of sociological information aimed at studying the territorial identity of city area residents using Internet sources. Communities of social networks, e.g. VKontakte, are considered as the main data source, and websites of topographic objects found in the territories under study are used as auxiliary information sources. It is demonstrated that, in terms of information support, public pages and groups with open or restricted access walls have the greatest potential. The developed algorithm implies selecting relevant groups, finding content concerning area issues, and determining the indices of community activity in discussing territorial problems. The required information is retrieved through the interaction with a social network server with the use of the official Application Programming Interface (API). To identify communities and posts, it is proposed to apply methods of morphological analysis of textual information. The software implementation of the algorithm is described in Python 3.8.5, including original functions for the acquisition of data on communities by their identification numbers, for the formation of a set of urbanonyms for a specified area, and some other ones. The developed program has been used to analyze territorial groups in three areas of Moscow; the results of the analysis enable us to estimate the degree of the territorial identity of their residents. The analysis of the error in the results of automated data collection and processing shows good agreement of these results with manually obtained ones, i.e. the error is 2.6% in the identification of relevant groups and about 3% in the identification of posts on area issues. Therewith, a much higher speed of response and lower labor effort required to perform routine operations allow the algorithm and the implementing computer program to be viewed as an effective tool for sociological research based on data from social networks.

LoRaWAN Link Layer

The LoRaWAN Link Layer specification [1] is a communication protocol for the Internet of Things. It targets low power, long range, low cost communication using unlicensed spectrum. Network topology is collaborative, which reduces a lot protocol signalling compared to a cellular network. The device is connected to a network server, and protocol overhead is limited to 13 bytes for any data frame. There are three classes of operation. Class A is optimized for low power operation of end-devices, while class B and class C offer reduced downlink latency. The protocol specification offers several mechanisms to adjust the link layer parameters: adaptive data rate, adaptive power control, variable repetition rate, and channel selection.