Pub Date : 2023-01-01DOI: 10.4236/ojapps.2023.139125
Vladyslav Kutsman
When developing programs or websites, it is very convenient to use relational databases, which contain powerful and convenient tools that allow to work with data very flexibly and get the necessary information in a matter of milliseconds. A relational database consists of tables and records in these tables, each table must have a primary key, in particular, it can be a number of BIGINT type, which is a unique index of a record in the table, which allows to fetch operation with maximum speed and O (1) complexity. After the operation of writing a row to the table of database, the program receives the row identifier ID in the form of a number, and in the future this ID can be used to obtain this record. In the case of a website, this could be the GET method of the http protocol with the entry ID in the request. But very often it happens that the transmission of an identifier in the clear form is not safe, both for business reasons and for security reasons of access to information. And in this case, it is necessary to create additional functionality for checking access rights and come up with a way to encode data in such a way that it would be impossible to determine the record identifier, and this, in turn, leads to the fact that the program code becomes much more complicated and also increases the amount of data, necessary to ensure the operation of the program. This article presents an algorithm that solves these problems “on the fly” without complicating the application logic and does not require resources to store additional information. Also, this algorithm is very reliable since it is based on the use of hash functions and synthesized as a result of many years of work related to writing complex systems that require an increased level of data security and program performance.
{"title":"Numeric Identifier Transmission Algorithm Using Hash Function","authors":"Vladyslav Kutsman","doi":"10.4236/ojapps.2023.139125","DOIUrl":"https://doi.org/10.4236/ojapps.2023.139125","url":null,"abstract":"When developing programs or websites, it is very convenient to use relational databases, which contain powerful and convenient tools that allow to work with data very flexibly and get the necessary information in a matter of milliseconds. A relational database consists of tables and records in these tables, each table must have a primary key, in particular, it can be a number of BIGINT type, which is a unique index of a record in the table, which allows to fetch operation with maximum speed and O (1) complexity. After the operation of writing a row to the table of database, the program receives the row identifier ID in the form of a number, and in the future this ID can be used to obtain this record. In the case of a website, this could be the GET method of the http protocol with the entry ID in the request. But very often it happens that the transmission of an identifier in the clear form is not safe, both for business reasons and for security reasons of access to information. And in this case, it is necessary to create additional functionality for checking access rights and come up with a way to encode data in such a way that it would be impossible to determine the record identifier, and this, in turn, leads to the fact that the program code becomes much more complicated and also increases the amount of data, necessary to ensure the operation of the program. This article presents an algorithm that solves these problems “on the fly” without complicating the application logic and does not require resources to store additional information. Also, this algorithm is very reliable since it is based on the use of hash functions and synthesized as a result of many years of work related to writing complex systems that require an increased level of data security and program performance.","PeriodicalId":19671,"journal":{"name":"Open Journal of Applied Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135699482","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}
Pub Date : 2023-01-01DOI: 10.4236/ojapps.2023.1310145
Ahmed Abdulaziz Alburaidi, Mohammed Naif Albarakati, Ahmed Khalid Sabr, Mohammed Fadhy Alharbi, Abdulazizkhalaf Alkhathami, Nesreen Ayman Kurdi
{"title":"Digital Transformation of Medical Maintenance at PSAFHM","authors":"Ahmed Abdulaziz Alburaidi, Mohammed Naif Albarakati, Ahmed Khalid Sabr, Mohammed Fadhy Alharbi, Abdulazizkhalaf Alkhathami, Nesreen Ayman Kurdi","doi":"10.4236/ojapps.2023.1310145","DOIUrl":"https://doi.org/10.4236/ojapps.2023.1310145","url":null,"abstract":"","PeriodicalId":19671,"journal":{"name":"Open Journal of Applied Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134884819","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}
Pub Date : 2023-01-01DOI: 10.4236/ojapps.2023.1310146
Vladyslav Kutsman
Financial independence and the ability to manage own capital can rightfully be considered one of the most important aspects of a person’s life. This is especially important in the context of the modern development of relations between people. Scientific and technological progress, marketing, and the development of social principles in social-economic relations develop in a person a stable system of views and interests. Which in turn generates a certain kind of demand for goods and services that no one could have previously thought of. An example of this could be buying clothes in a computer game for a favorite character, flying in a suit airplane, buying some item that can be thrown away by the same buyer a few minutes after the purchase. At the same time, there is no single theory about how to act and what to do in order to develop a kind of information immunity to this kind of information flow. How to develop financial-analytical thinking and learn to use it at the subconscious level. When a person seems to have made his choice without thinking. This article proposes a theory-method of teaching based on the work of financial institutions, which will allow to develop financial and analytical thinking that allows to make decisions that are most beneficial for a person from a financial point of view. First of all, this article will be useful to those who have plans to connect their lives with finance.
{"title":"Theory of Development of Financial-Analytical Thinking","authors":"Vladyslav Kutsman","doi":"10.4236/ojapps.2023.1310146","DOIUrl":"https://doi.org/10.4236/ojapps.2023.1310146","url":null,"abstract":"Financial independence and the ability to manage own capital can rightfully be considered one of the most important aspects of a person’s life. This is especially important in the context of the modern development of relations between people. Scientific and technological progress, marketing, and the development of social principles in social-economic relations develop in a person a stable system of views and interests. Which in turn generates a certain kind of demand for goods and services that no one could have previously thought of. An example of this could be buying clothes in a computer game for a favorite character, flying in a suit airplane, buying some item that can be thrown away by the same buyer a few minutes after the purchase. At the same time, there is no single theory about how to act and what to do in order to develop a kind of information immunity to this kind of information flow. How to develop financial-analytical thinking and learn to use it at the subconscious level. When a person seems to have made his choice without thinking. This article proposes a theory-method of teaching based on the work of financial institutions, which will allow to develop financial and analytical thinking that allows to make decisions that are most beneficial for a person from a financial point of view. First of all, this article will be useful to those who have plans to connect their lives with finance.","PeriodicalId":19671,"journal":{"name":"Open Journal of Applied Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135261204","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}
Pub Date : 2023-01-01DOI: 10.4236/ojapps.2023.1310136
Rui Ke
“Green” has become a fundamental requirement for all development initiatives in China. The idea of harmonious coexistence between man and nature has gained significant prominence. General Secretary Xi Jinping places great importance on ecological and environmental protection, offering clear directives for ecological preservation efforts within the delivery industry [1]. He emphasizes the necessity to address packaging waste in online shopping and express delivery, eliminate excessive packaging, and reduce environmental waste and pollution. In this process, China Post will actively respond to the central government’s imperatives and formulate a series of strategies and plans, including green post ideas, transportation, packaging, and finance.
{"title":"Green Post Development Strategy in the Context of Ecological Civilization","authors":"Rui Ke","doi":"10.4236/ojapps.2023.1310136","DOIUrl":"https://doi.org/10.4236/ojapps.2023.1310136","url":null,"abstract":"“Green” has become a fundamental requirement for all development initiatives in China. The idea of harmonious coexistence between man and nature has gained significant prominence. General Secretary Xi Jinping places great importance on ecological and environmental protection, offering clear directives for ecological preservation efforts within the delivery industry [1]. He emphasizes the necessity to address packaging waste in online shopping and express delivery, eliminate excessive packaging, and reduce environmental waste and pollution. In this process, China Post will actively respond to the central government’s imperatives and formulate a series of strategies and plans, including green post ideas, transportation, packaging, and finance.","PeriodicalId":19671,"journal":{"name":"Open Journal of Applied Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135156680","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}
Pub Date : 2023-01-01DOI: 10.4236/ojapps.2023.1310137
Fu Lin, Xianguo Cao
Based on the analysis of the basic principle of slope compensation, a high-precision adaptive slope compensation circuit for peak current mode boost DC/DC converter is designed. The circuit dynamically detects the input and output voltage of the boost circuit to realize automatic adjustment of the compensation amount with the change of duty ratio, which makes the ramp compensation slope optimized. The design uses a high-precision subtracter to improve the accuracy of slope compensation. While eliminating sub-slope oscillation and improving the stability of boost circuit, the negative impact of compensation on boost circuit is minimized, and the load capacity and transient response speed of boost circuit are guaranteed. The circuit is designed based on SMIC 0.18um CMOS technology, with simple structure, high reliability and easy engineering implementation. Spectre circuit simulator 17.1.0.124 64b simulation results show that the circuit has high compensation accuracy and wide input and output voltage range. When the working voltage is 3.3 V, the compensation slope can be adjusted adaptively under different duty cycles, and the minimum error between the compensation slope and the theoretical optimal compensation slope is only 0.42%.
{"title":"An Adaptive Slope Compensation Circuit for Peak Current Mode of Boost Switching Power Supply","authors":"Fu Lin, Xianguo Cao","doi":"10.4236/ojapps.2023.1310137","DOIUrl":"https://doi.org/10.4236/ojapps.2023.1310137","url":null,"abstract":"Based on the analysis of the basic principle of slope compensation, a high-precision adaptive slope compensation circuit for peak current mode boost DC/DC converter is designed. The circuit dynamically detects the input and output voltage of the boost circuit to realize automatic adjustment of the compensation amount with the change of duty ratio, which makes the ramp compensation slope optimized. The design uses a high-precision subtracter to improve the accuracy of slope compensation. While eliminating sub-slope oscillation and improving the stability of boost circuit, the negative impact of compensation on boost circuit is minimized, and the load capacity and transient response speed of boost circuit are guaranteed. The circuit is designed based on SMIC 0.18um CMOS technology, with simple structure, high reliability and easy engineering implementation. Spectre circuit simulator 17.1.0.124 64b simulation results show that the circuit has high compensation accuracy and wide input and output voltage range. When the working voltage is 3.3 V, the compensation slope can be adjusted adaptively under different duty cycles, and the minimum error between the compensation slope and the theoretical optimal compensation slope is only 0.42%.","PeriodicalId":19671,"journal":{"name":"Open Journal of Applied Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135156098","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}
{"title":"Determination of the Electrical Parameters of a Solar Cell in Steady State","authors":"Omar Diallo Sadio, Mamadou Kouyaté, Papa Touty Traoré, Fabé Idrissa Barro","doi":"10.4236/ojapps.2023.1310144","DOIUrl":"https://doi.org/10.4236/ojapps.2023.1310144","url":null,"abstract":"","PeriodicalId":19671,"journal":{"name":"Open Journal of Applied Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134884499","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}
Pub Date : 2023-01-01DOI: 10.4236/ojapps.2023.139128
Yi Quan
The Tempest, written by William Shakespeare, is highly influenced by The Holy Bible, the western culture and literature source. This paper utilizes Northrop Frye’s mythic archetypal criticism theory to study the play’s embodiment of the biblical archetypal model. Previous studies have only dealt with one aspect of the biblical archetype in The Tempest. This essay discusses that the characters, structure, plot, and imagery of The Tempest can all find the archetypes in The Holy Bible. It is found that the play is the Scriptures’ double to some extent, through which Shakespeare wants to spread biblical values such as morality and fraternity.
{"title":"The Biblical Archetypal Model and Its Embodiment in <i>The Tempest</i>","authors":"Yi Quan","doi":"10.4236/ojapps.2023.139128","DOIUrl":"https://doi.org/10.4236/ojapps.2023.139128","url":null,"abstract":"The Tempest, written by William Shakespeare, is highly influenced by The Holy Bible, the western culture and literature source. This paper utilizes Northrop Frye’s mythic archetypal criticism theory to study the play’s embodiment of the biblical archetypal model. Previous studies have only dealt with one aspect of the biblical archetype in The Tempest. This essay discusses that the characters, structure, plot, and imagery of The Tempest can all find the archetypes in The Holy Bible. It is found that the play is the Scriptures’ double to some extent, through which Shakespeare wants to spread biblical values such as morality and fraternity.","PeriodicalId":19671,"journal":{"name":"Open Journal of Applied Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135798652","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}
Pub Date : 2023-01-01DOI: 10.4236/ojapps.2023.1311151
Gabin Alex Nouemssi, Guy Edgar Ntamack, Martin Ndibi Mbozo’O, Bonaventure Djeumako
This paper presents an experimental study of the characterisation of local materials used in the construction and thermal insulation of buildings. These materials are compressed earth bricks stabilised with cement and sawdust. The thermal conductivity, diffusivity, effusivity, and specific heat of earth-based materials containing cement or sawdust have been determined. The results show that the blocks with earth + sawdust are better thermal insulators than the blocks with simple earth. We observe an improvement in thermal efficiency depending on the presence of sawdust or cement stabilisers. For cement stabilisation, the thermal conductivity increases (λ: 1.04 to 1.36 W·m-1·K-1), the diffusivity increases (from 4.32 × 10-7 to 9.82 × 10-7 m2·s-1), and the effusivity decreases (1404 - 1096 J·m-2·K-1·s-1/2). For sawdust stabilisation, the thermal conductivity decreases (λ: 1.04 to 0.64 W·m-1·K-1), the diffusivity increases (from 4.32 × 10-7 to 5.9 × 10-7 m2·s-1), and the effusivity decreases (1404 - 906 J·m-2·K-1·s-1/2). Improving the structural and thermal efficiency of BTC via stabilisation with derived binders or cement is beneficial for the load-bearing capacity and thermal performance of buildings.
{"title":"Thermal Properties of Earth Bricks Stabilised with Cement and Sawdust Residue Using the Asymmetrical Hot-Plane Method","authors":"Gabin Alex Nouemssi, Guy Edgar Ntamack, Martin Ndibi Mbozo’O, Bonaventure Djeumako","doi":"10.4236/ojapps.2023.1311151","DOIUrl":"https://doi.org/10.4236/ojapps.2023.1311151","url":null,"abstract":"This paper presents an experimental study of the characterisation of local materials used in the construction and thermal insulation of buildings. These materials are compressed earth bricks stabilised with cement and sawdust. The thermal conductivity, diffusivity, effusivity, and specific heat of earth-based materials containing cement or sawdust have been determined. The results show that the blocks with earth + sawdust are better thermal insulators than the blocks with simple earth. We observe an improvement in thermal efficiency depending on the presence of sawdust or cement stabilisers. For cement stabilisation, the thermal conductivity increases (λ: 1.04 to 1.36 W·m-1·K-1), the diffusivity increases (from 4.32 × 10-7 to 9.82 × 10-7 m2·s-1), and the effusivity decreases (1404 - 1096 J·m-2·K-1·s-1/2). For sawdust stabilisation, the thermal conductivity decreases (λ: 1.04 to 0.64 W·m-1·K-1), the diffusivity increases (from 4.32 × 10-7 to 5.9 × 10-7 m2·s-1), and the effusivity decreases (1404 - 906 J·m-2·K-1·s-1/2). Improving the structural and thermal efficiency of BTC via stabilisation with derived binders or cement is beneficial for the load-bearing capacity and thermal performance of buildings.","PeriodicalId":19671,"journal":{"name":"Open Journal of Applied Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135711592","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}
Pub Date : 2023-01-01DOI: 10.4236/ojapps.2023.139120
Mahammad A. Nurmammadov
As is known, the Great Red Spot (GRS) is one of the most mysterious sights in the solar system and is a strong storm that is quite large. According to the laws of hydrodynamics and gas dynamics, it should have disappeared several centuries ago, but scientists still observe it and cannot accurately explain this phenomenon. Since turbulence and atmospheric waves in the GRS region absorb the energy of its winds, the vortex loses energy by radiating heat. In the work, it is proved with a mathematical and non-classical approach that the GRS and anticyclones will live for a long time; otherwise, we had to first of all prove that the vortex threads (loops) and ovals could not exist. Based on these supports, mathematical methods prove their existence forever by observing a large vortex (GRS); moreover, they are sources of heat. When proofs are obtained, the results are consistent with the previous hypotheses of the researcher. The introduction of the work gives a comparison of various hypotheses; for example, one of them states that the decrease in the size of the GRS is only an illusory observation. Next, we first consider the applicability conditions for the mathematical justification of the hypothesis of the longevity of the Great Red Spot. The wind equation and the GRS are energized by absorbing smaller eddies and ovals, and this total energy is constant. With the help of the KH mechanism in the case of Brunt Vaisala, the frequencies (which can be calculated by a program with given formulas) are determined using very strictly mathematical evidence to substantiate the validity of the hypothesis about the longevity of Jupiter’s Great Red Spot.
{"title":"A New Mathematical Justification for the Hypothesis of the Longevity of Jupiter’s Great Red Spot","authors":"Mahammad A. Nurmammadov","doi":"10.4236/ojapps.2023.139120","DOIUrl":"https://doi.org/10.4236/ojapps.2023.139120","url":null,"abstract":"As is known, the Great Red Spot (GRS) is one of the most mysterious sights in the solar system and is a strong storm that is quite large. According to the laws of hydrodynamics and gas dynamics, it should have disappeared several centuries ago, but scientists still observe it and cannot accurately explain this phenomenon. Since turbulence and atmospheric waves in the GRS region absorb the energy of its winds, the vortex loses energy by radiating heat. In the work, it is proved with a mathematical and non-classical approach that the GRS and anticyclones will live for a long time; otherwise, we had to first of all prove that the vortex threads (loops) and ovals could not exist. Based on these supports, mathematical methods prove their existence forever by observing a large vortex (GRS); moreover, they are sources of heat. When proofs are obtained, the results are consistent with the previous hypotheses of the researcher. The introduction of the work gives a comparison of various hypotheses; for example, one of them states that the decrease in the size of the GRS is only an illusory observation. Next, we first consider the applicability conditions for the mathematical justification of the hypothesis of the longevity of the Great Red Spot. The wind equation and the GRS are energized by absorbing smaller eddies and ovals, and this total energy is constant. With the help of the KH mechanism in the case of Brunt Vaisala, the frequencies (which can be calculated by a program with given formulas) are determined using very strictly mathematical evidence to substantiate the validity of the hypothesis about the longevity of Jupiter’s Great Red Spot.","PeriodicalId":19671,"journal":{"name":"Open Journal of Applied Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135495189","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：