Sunday, January 26, 2020

Survey on Spatial Database Systems

Survey on Spatial Database Systems à ¯Ã‚ Ã¢â‚¬ ºÃƒ ¯Ã¢â€š ¬Ã‚  Ãƒ ¯Ã‚ Ã‚  Abstract—In this survey, the term of â€Å"spatial database†, its data models, its data types with implementations, and its management techniques are described with providing at least spatial join methods. Also the storage and query processing algorithms for such databases are surveyed. (Abstract section will be updated with final report) 1.Introduction Various fields need various data types such as character, number, date, time, and image in data base management systems (DBMS). Some other fields need more specialized data types with geometric and geographical attributes. Those needs are satisfied by the spatial data. The Spatial Data is described as data related to time and space [12]. The most noticeable area for spatial data types is two dimensional abstraction of the earth surface [Figure 1]. Other examples are layouts of very large scale integration designs in electronics, 3D designs of biological issues like DNA, and the complicated models of the human brain systems. Figure 1: Spatial Data. (Source: http://www.cubrid.org/blog/dev-platform/20-minutes-to-understanding-spatial-database/ [11]) Spatial database systems can be grouped as followings [1]: Geographical Information Systems (GIS) deal with digitized maps displaying geographic or thematic information. Automated Mapping/Facilities Management (AM/FM) systems which automate the management and maintenance of networks such as power grids or telephone lines. Land Information Systems (LIS) manage information such as Image Processing systems which process remote sensing images acquired by aircraft and satellites. LIS also deal with the details of land parcel ownership. Although the relational DBMS’s have been tried to manage those types of data, they did not meet the requirements properly [12]. Spatial database systems provide advantages in areas such as decision support, administration, transportation scheduling, resource management, environmental monitoring, real-time navigational systems, data quality and integrity enforcement, and impact assessment. The remaining of this draft report is organized as follows: In Section 2, Modeling Spatial Database Systems is explained in detail. In Section 2.1, the characteristics of spatial data types are represented. The relations and related explanations are provided in Section 2.2. The querying and its techniques are represented in Section 2.3. At 2.4, indexing of spatial data is shown. Visualization of spatial data is explained in Section 2.5. Finally, concluding remarks are summarized in Section 3. 2. Modeling SPATIAL DATABASE SYSTEMS Spatial database systems are either the new DBMS or additional features on Relational DBMS’s. It is a DBMS with additional capabilities for handling spatial data and Offers spatial data types in its data model and query language. For modeling such a database system, data types, relations, querying, indexing and visualization steps can be considered different parts of it. 2.1.Data TYPES There are classical data types for all DBMS such as types of chars, types of numbers, date, and time. Spatial data shows the geometric and geographical variables such as point, line, region, polyline, and polygon. The presentation of those can be divided into two main groups [1]. 2.1.1. Objects in space It is a representation of spatial data types such as polygons, lines, polylines etc. Point: As pairs of coordinates in lat/long or some other reference system A point feature is a zero-dimensional cartographic object. It specifies the geometric location and no other meaningful measurement The size of the point may vary, but the area of those symbols is meaningless Four types of points exist: entity point, label point, area point and node Line: Ordered sequence of points connected by straight lines Line features are one dimensional features, despite occupying two-dimensional space. A line segment is the direct connection between two points A line feature is typically represented as a sequence of vectors An Arc is the location of points that are defined by a mathematical function to form a curve Link or edge is the connection between two nodes Areas: As ordered rings of points connected by straight lines to form polygons Area is a two dimensional, bounded and continuous object Interior area is an area not including its boundary Simple polygon consists of an interior area and an outer ring. The boundary does not intersect itself Typically refers to vector polygons, but also relates to pixels and grid cells. 2.1.2.Space It deals with Statement about every point in space such as partitions into states, counties, municipalities etc. (This section will be detailed in final report) 2.2.REALATIONS Spatial relationships are very important in the operations offered by spatial algebras. For instance, it is possible to ask for all objects in a given relationship with a query object, e.g. all objects within an object or intersection points. There are several classes [8, 3, 4]: †¢ Topological relationships †¢ Direction relationships †¢ Metric relationships (This section will be detailed in final report) 2.3.QUERYING Spatial data requires a graphical presentation of results. In addition, SDT values used in queries or graphical input of queries need graphical representations. (This section will be detailed in final report) 2.3.1.Languages Query languages for spatial databases can be used as candidates for the creation of a spatial language. Because of the extra semantic complexity added by spatial dimensions, it is desirable to have features in a spatial query language that go beyond those provided by currently available mainstream relational languages. (This section will be detailed in final report) 2.3.2.Operators There are several types of spatial operators [4] logical relationships, arithmetic, spatial metrics, position, orientation, area, volume, shape, extent, surface, disjunction, intersection, inclusion, neighborhood, and equality. (This section will be detailed in final report) 2.4.INDEXING For all DBMS, fast access to row data depends on the quality of indexing. Complex indexing methods can be used to rapidly locate single or multiple objects in the databases. (This section will be detailed in final report) 2.4.1.Indexing Methods For spatial databases, some indexing techniques such as quadtrees [6], R-Trees [2] are mostly used ones. (This section will be detailed in final report) 2.5.vÄ ±sualÄ ±zatÄ ±on The modern database management systems provide visualization tools to represent spatial data and queries about those data. Browsers, plotters and map displays can be considered as standard tools for spatial database systems. Although some researchers classify the spatial maps as maps showing qualitative, quantitative and composite change, and space-time ratios[9], some researchers made this classification like dance maps, chess maps and change maps to visualize time series data [7]. (This section will be detailed in final report) 3. ConclusÄ ±on (This section will be detailed in final report) 4. ReferenceS [1] Abel, D.J. Whats Special about Spatial?. Proc. of the 7th Australian Database Conference, Melbourne, Australia, 1996, 72-81. [2] Guttman, A. R-trees: A Dynamic Index Structure for Spatial Searching. Proceedings of the ACM SIGMOD International Conference on Management of Data, 1984, 47-57. [3] Egenhofer, M., A Formal Definition of Binary Topological Relationships. Proc. 3rd Intl. Conf. on Foundations of Data Organization and Algorithms, Paris, 1989, 457-472. [4] Langran, G. Manipulation and Analysis of Temporal Geographic Information. Proc. of the Canadian Conference on GIS 93, Ottawa, Canada, 1993. [6] Samet, H. The Design and Analysis of Spatial Data Structures. Addison-Wesley, 1990. [7] Monmonier, M. Strategies for the Visualization of Geographic Time-Series Data, Cartographica, 1990, 30-45 [8] Pullar, D., and Egenhofer, M., Towards Formal Definitions of Topological Relations Among Spatial  Objects. Proc. 3rd Intl. Symposium on Spatial Data Handling, Sydney, 1988, 225-242. [9] Muehrcke, P.C.. Map Use, JP Publications, 1978. [10] Worboys, M.F., A Generic Model for Planar Geographical Objects. Intl. Journal of Geographical Information Systems , 1992 , 353-372. [11] 20 Minutes to Understanding Spatial Database. Retrieved October 20, 2014, from http://www.cubrid.org/blog/dev-platform/20-minutes-to-understanding-spatial-database/ [12] An introduction to spatial database systems. (1994). The International Journal on Very Large Data Bases, 3(4), 357-399. (This section will be updated in final report)

Saturday, January 18, 2020

Gap in Gender Pay Essay

INTRODUCTION: Although women are steadily making their mark in the business world and heading major corporations, the question remains, are they still earning less than their male counterparts? Throughout time there has been a definite difference between men and women and their median income. This wage gap cuts across a wide spectrum of occupations. However, in 1963 the Equal Pay Act was signed making it illegal for employers to pay unequal wages to men and women who hold the same job and do the same work. There may be many reasons for this gap in salaries; most of them may not be necessarily based on gender. The following research will investigate what causes the gap in earnings, if any, and examines various factors that may have an effect on the earnings of men and women. I. RESEARCH PURPOSE The purpose of this research is to determine whether or not women who are working the same types of jobs, with the same amount of education and experience are being compensated the same as men. Although women have made a significant pace in entering the workforce and in exploring a wider range of occupations, they may still be treading behind in wages earned compared to their male counterparts. Many years ago, it was thought that because women were not as well educated as men, did not have as much experience as men, and did not work as hard as men that the range of pay should not be the same. This is no longer true and women have been graduating from college at the same rate as men and are working just as hard as men. However, the wage gap between men and women remains and nationally, women earn 77 cents for every $1 earned by men (Head, 2008). Thus, despite a sense of continued progress toward gender equality in the workplace the gap between men and women still persists. The significance of this research issue may reveal an underlying discrimination between the sexes that many may believe has narrowed. The importance in equality of gender pay is not only that it is the right thing to do, but an equitable and competitive pay package improves employee recruitment and retention.  This concept benefits both the employer and the employee, male or female. Nonetheless, as long as this gap remains the more likely this issue will provide a main source of debate among the organizational workforce. II. PROBLEM DEFINITION: The study, by the American Association of University Women Educational Foundation, found that 10 years after college, women earn only 69% of what men earn. (USA Today, 2007) Defining the problem starts with an examination of the evidence to determine how big the gap truly is and whether discrimination is to blame. Essential variables that may have an impact on male-female wage differential such as ethnic background, age, and industry will be measured. Our team will research and find out how big the gap is what could be the cause, factors such as: a). Hours of work- some tend to think that men are more likely to work longer hours. b). Education levels-some tend to think that men on average is higher qualified and women invest less in their education. c). Workforce participation and experience-industries tend to think that women spend less time at work because of their domestic responsibilities to their children and family. The majority of organizations assume that young women are going to leave the workforce when they have children, and therefore will not promote them. d). Why is there such a gap between the amount on a man’s paycheck compared to a woman’s? e). Occupation type- some think women are looking for an easy way out and they tend to seek out and cluster around a few occupations and industries because of the tastes of employers, male employees and customers. f). Are women given the same opportunities for advancement as men? Our team will investigate what percentage of these factors contributes to the difference in pay between these two genders and seek to find out if discrimination plays a part in this pay gap and will the gap disappear through educational achievements. Why do woman not have equal job opportunities? Jobs held by women pay less than jobs held by men, even though the job requires the same education and skills. A newly hired woman will get a lower paying assignment than a man who started working there the same time for the same employer. Not only that also, women do not receive the equal chances in promotions like men. Equal pay has been an issue for all working women for the past few decades. III. RESEARCH HYPOTHESIS While some studies may reflect a sense of continued progress towards gender equality in the workplace, the federal government currently confirms that the workplace earnings gap amongst men and women is still prevalent today (About Management.Com). It is the educated guess of this team that men are paid at a substantially increased rate for performance in positions than women are paid to operate in those same positions. This hypothesis is deducted from observations made from current work situations, random peer discussions, and updated articles. More than forty years after the Federal Equal Pay Act, hard working women are still being paid less than men are on the job. There are numerous speculations that can be made in an attempt to explain this is behavior, such as career selections being made by men and women. Women tend to make decisions about employment based on convenience, meaning that women migrate to positions that will allow for them to maintain a active home life and still maintain a 40 hour work week, whereas men will more than likely trade an active home life for longer work hours, safety risks, frequent travel, longer work hours and extended commuting times to make the higher pay. While these practices may not be fair, they are a reality. The research provided in this paper will lead to three possible outcomes; it will either prove that men are paid at higher rates than women to operate in the same or similar positions, women are paid at higher rates than men to operate in the same or similar position, or men and women break even when it comes to wages and position. References Head, Lauren Lawley. (2008, April 23). Pay Gap Worth Steaming Over: Bizwomen.com. Retrieved April 29, 2008, from http://www.bizjournals.com/bizwomen/index.php/2008/04/23/pay-gap-worth-steaming-over/ Coutts, Justin. (2004, February). Policy Backgrounder, Business Roundtable. Retrieved April 29, 2008 from http://www.nzbr.org.nz/documents/policy/policy-2004/PB_No1.pdf Arndt, Bettina. (2006,October 16). Herald Sun.com. Why Men are paid More. Retrieved April 29, 2008 from http://www.news.com.au/heraldsun/story/0,21985,20586168-5000117,00.html

Friday, January 10, 2020

Explain how act 1 scene 1 prepares the audience for the actions that follow

Act 1 scene 1 main purpose is to introduce the themes in the play, preparing the reader for the conflict between the contrasting outlooks of the characters. In the first scene we see the friendship groups between the characters also showing the potential ‘lovers' from this initial description, Finding out who is friends with who can also give us explanations to who is going to defend each other and who may want to maliciously trick each other. Shakespeare also shows opposing traits between many characters, even between family members. Hero is polite, quiet, respectful, and gentle, whereas Beatrice is feisty, cynical, witty, and sharp. Similarly there is a contrast between Don John who has evil and deceptive intentions, and his opposite, Don Pedro, who is a loyal and noble person. Don John ‘the bastard' and his vile comrades contrast with Don Pedro the noble prince and his heroic friends. The difference in the brothers' standing in society is mirrored in their personalities. In the first scene, we see an apparent reconciliation between Don John and Don Pedro but the jealous and malicious instincts of Don John can not hide themselves for too long â€Å"I can not hide what I am†, he confesses â€Å"I am a plain dealing villain†. It is ironic how frank Don John is about his character, as many of the protagonists deceive each other, and in Beatrice and Benedict's case they trick even themselves into believing â€Å"I love none†. Deception is a recurrent theme, not only this play but also many of Shakespeare's plays. You can read also Audience Adaptation Paper Hero is a conventional, â€Å"modest young lady†, different in both appearance and personality to her cousin Beatrice. Hero conforms to the patriarchal society of Messina, obeying her father unquestioningly, and behaving demurely, like a woman ‘should'. Beatrice is older than Hero, yet unlike her cousin she is unwilling to conform. Feisty and assertive, Beatrice engages in intelligent wordplay, a ‘merry war' with her male superior, Benedick, referring to him as â€Å"signor mountanto† a fencing term symbolic of the battle of words and wills the two share. Though their insults are biting, their ability to maintain such clever, interconnected sparring seems to illustrate the existence of a strong bond between them. The audience is prepared for the great contrasts in behaviour between the two women from the start of the play, and begins to expect a resolution involving the ‘taming' of Beatrice. We can also assume by Benedick`s description of Beatrice that he does in fact find her more attractive then we first thought and he ‘accidently' reveals he is attracted to Beatrice in comparison to that of Hero, she â€Å"exceeds in beauty†. This is also Benedick showing rudely how â€Å"I do not like (Hero)†. Beatrice and Benedick are perhaps Shakespeare's most famously witty characters; neither lets the other say anything without countering it with a pun or criticism. First impressions of Benedick are of loyalty to his friends, but also of arrogance and he sounds on the outset like a misogynist, proclaiming â€Å"I am loved of all ladies† but â€Å"truly I love none†. As the scene progresses we get small inclinations that maybe he does love someone, â€Å"her cousin exceed her as much in beauty†, showing he finds Beatrice attractive. He engages with Beatrice in a competition to outwit, outsmart, and out-insult the other. As with many of Shakespeare plays we can presume this ‘merry war' is hiding their true feelings. From first impressions we see he is constantly performs for the benefit of others, and indulges in witty banter with many to express his feelings. Claudio from the beginning seems deeply attracted to Hero, showing a romantic outlook with â€Å"soft and delicate desires†. Unfortunately, his fickle and suspicious nature makes him quick to believe evil rumours, and he is hasty to despair and take revenge. He appears to love Hero, but the opinion of others changes his mind so we have to question if this relationship is genuine. It is also strange for us to see his love so quickly in the first scene, as he first notices â€Å"the sweetest lady I ever looked upon†. Don Pedro insists on wooing Hero for Claudio himself, whilst masked, rather than allowing Claudio to profess his love to Hero first, â€Å"I will assume thy part in some disguise†: this is the first introduction to the recurrent theme of appearance and reality.

Thursday, January 2, 2020

Expanding to China Essay - 1583 Words

Expanding to China The purpose of this proposal is to explore the potential challenges involved in expanding business activities in China. Of specific concerns are (1) the need to identify expatriates; (2) recruit local talent to staff the business units; (3) develop those employed in the expansion project; and (4) identify and address cross-culture issues that will inevitably emerge and determine the most efficient and effective strategies for addressing the deployment of expatriates and local talent. In attempting to respond to these challenges substantial research was done, providing guidance, which can be considered in the expansion efforts. Expats versus Hiring Local Talent In pursuing expansion into the China market, the company†¦show more content†¦However, it is equally important to have expatriates, specifically at the managerial level, to ensure the functionality of daily operations and act as liaisons between local government and other Chinese local interests (Ahlstrom, Young, Nair, 2003). Ahlstrom, Young, and Nair posit that foreign firms can also reduce the likelihood of confronting local pressures ...by hiring people with established connections and influence... (Ahlstrom, Young, Nair, 2003, p. 4). This also will allow for a smoother transition and set the basis for long-term stability in the Chinese locality. Attract and Develop Expats and Local Talent Regarding the identification of competent expatriates to establish business operations in China and the recruitment of local talent, the challenges are formidable, however, manageable. For example, according to Johannes Meier, Javier Perez, and Jonathan R. Woetzel, in their article, Solving the Puzzle: MNCs in China, foreign businesses are experiencing considerable difficulty in â€Å"identifying skilled local managers and experienced expatriates capable of leading China initiatives (Meier, Perez, Woetzel, 1995, p. 20). In response to these challenges, the authors recommend four important strategies for ensuring success in China. First, the company must establish a strong China corporate center to coordinate external relationships, including investment decisions and strategic development andShow MoreRelatedExpanding Ikea into China: An Analysis673 Words   |  3 PagesTO: Ikea Board of Directors and Human Resource Managers FROM: I.B Analyst, International Expansion Project RE: Movement into China Globalization has brought the world closer in communication, economics, politics, and especially business. 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