Monday, May 25, 2020

Computational Modeling, An Artificial Intelligence...

1. Abstract: The Ccost estimate is important for projects throughout its life cycle, starting from feasibility studies till tendering stage and developing BOQ, it provides significant information that even may serve project budgeting and controlling if reliable. This paper presents a comparison between two cost estimate predictive modeling, an artificial intelligence approach using neural networks as non-parametric modeling; and multiplely regression modeling that represents advanced engineering statics - a parametric modeling. Results show that neural networks have advantages when dealing with data that for which there is little a priori knowledge of the appropriate cost estimate relationship to select for regression modeling. However, in cases where an appropriate CER can be identified, regression models have significant advantages in terms of accuracy, variability, model creation and model examination. Both simulated and actual data sets are used for comparison. Our research is applied for a specific package of construction projects (concrete work) based on 17 projects with a 115 records. Key words: construction projects, cost estimate. Concrete work, neural network, multiply regression. 2. Introduction: Cost estimate is the productive process used to quantify cost and price the resources to achieve project scope; the output can be used for many purposes throughout project life cycle such as: Determining the economic feasibilityShow MoreRelatedEssay On Object Detection9136 Words   |  37 Pages A Survey of Vision-Based Background Modeling and On-Road Object Detection Method XIREN MA, University of Ottawa Vision-based moving object detection has received a lot of attention in recent years. I proposed a categorization of moving object detection method based on the position of the camera, namely static methods and non-static methods. In this paper, I introduced the commonly used moving object detection methods for each category. For the static methods, the camera is placed at a certain

Thursday, May 14, 2020

An Occurrence At Owl Creek Bridge By Ambrose Bierce

â€Å"An Occurrence at Owl Creek Bridge† was written by Ambrose Bierce. In the story, the main character, Peyton Farquhar, is standing on a railroad bridge that is twenty feet above the water while his wrists are bound behind his back and a noose is tied to his neck to a beam overhead. Two other soldiers from the Northern army, a sergeant and captain, were around him waiting for execution. There were also sentinels standing besides them. Many infantrymen led by their lieutenant were standing assembled before the fort. When the two soldiers finish preparations, they remove the planks that they have been standing. The sergeant salutes his captain, then went on the opposite end of the board supporting Farquhar as the captain steps off. Farquhar stares into the water below, watching a piece of driftwood being carried downstream. He shuts his eyes and heard the sound from his watch, then he open his eyes and jump into the water as the sergeant steps away form the board when captain nods. After this the story started to talk about Farquhar. He was a successful planter who was unable to join the Confederate army, but he still helped the South in some significant way. One evening, he and his wife was sitting on their property when a soldier came up to as for a drink. The soldier was from the Confederate army. Farquhar was informed that North had fixed the railroads and reached the Owl Creek bridge. The soldier told him that he could set fire to the driftwood piled up near the bridgeShow MoreRelatedAn Occurrence At Owl Creek Bridge By Ambrose Bierce1283 Words   |  6 Pages 1. â€Å"An Occurrence at Owl Creek Bridge† by Ambrose Bierce Theme: Time can be the perception of each person at each different event in their life In this story one of the key factors is time and how Farquhar sees it.While mere seconds for the soldiers can be hours for the man about to be hanged, time is perceived to be different for each individual, â€Å"Its recurrence was regular, but as slow as the tolling of a death knell.† The idea that time can feel slower at one point and faster at anotherRead MoreAn Occurrence At Owl Creek Bridge By Ambrose Bierce1283 Words   |  6 Pages 1. â€Å"An Occurrence at Owl Creek Bridge† by Ambrose Bierce Theme: Time can be the perception of each person at each different event in their life In this story one of the key factors is time and how Farquhar sees it.While mere seconds for the soldiers can be hours for the man about to be hanged, time is perceived to be different for each individual, â€Å"Its recurrence was regular, but as slow as the tolling of a death knell.† The idea that time can feel slower at one point and faster at another throwsRead MoreAn Occurrence At Owl Creek Bridge By Ambrose Bierce1538 Words   |  7 Pagesshort story â€Å"An Occurrence at Owl Creek Bridge† by Ambrose Bierce, was a farmer who was rejected from enlisting in the army. The story takes place during the Civil War in the South. Peyton came from a highly-respected family in the southern state Alabama. He was devoted to the southern customs. Peyton unfortunately was unable to enter the war due to certain Circumstances. One day a soldier comes to Peyton’s home. His wife and he help the solider learning about Owl Creek Bridge. Pretty much theRead MoreThe Occurr ence At Owl Creek Bridge By Ambrose Bierce Essay1189 Words   |  5 PagesBlurred line between Reality and Illusion In the story â€Å"The Occurrence at Owl Creek Bridge† by Ambrose Bierce Peyton Farquhar a southern planter is being hung on a railing above the Owl Creek Bridge for interfering with the railroad posted by confederate soldiers. Within minutes before his execution Farquhar begins to have vivid hallucinations about breaking free and escaping. In his story â€Å"An Occurrence at Owl Creek Bridge,† Ambrose Bierce’s theme describes the perception of illusion vs. realityRead MoreAn Occurrence at Owl Creek Bridge, by Ambrose Bierce929 Words   |  4 PagesIn â€Å"An Occurrence at Owl Creek Bridge†, Bierce starts her short story on the edge with Peyton Farquhar, a 35 year old planter from the south, standing on Owl Creek Bridge with his hands tied behind his back and a noose around his neck. There are soldiers from the north surrounding him. Two soldiers, one on each side of him, take away the plank in which he is standing on. Falling to the water, Farquhar foc uses his last thoughts on his family, while also having hopes of freeing his hands and divingRead MoreAn Occurrence at Owl Creek Bridge by Ambrose Bierce1071 Words   |  5 Pagesthe fictional short story, â€Å"An Occurrence at Owl Creek Bridge†, author Ambrose Bierce tells the story of a man who finds himself in such a situation. Part one begins with an unnamed fugitive and a group of Federal Union Soldiers standing on a railroad bridge in Alabama. The story takes place during the American Civil War. The man is a civilian plantation owner who is awaiting execution by way of hanging. As he waits, the man stares down at the water below the bridge thinking about the ways he couldRead MoreAn Occurrence At Owl Creek Bridge By Ambrose Bierce1171 Words   |  5 Pages14 03 November 2014 Blurry Lines Between Reality And Illusion In â€Å"An Occurrence At Owl Creek Bridge† by Ambrose Bierce, the story of a man by the name of Peyton Farquhar whose unlawful actions landed him in a heap of trouble is told. The story is split into three sections which goes back in forth between the past, the present and Farquhar’s falsation of both. By taking the approach of using symbols throughout the story, Bierce gave the opportunity for the reader to feel like they are apart of theRead MoreAn Occurrence At Owl Creek Bridge By Ambrose Bierce Essay1484 Words   |  6 PagesJustifiably Bitter Bierce Ambrose Bierce led a relatively full but tragic life. After losing his sons Day and Leigh to suicide and alcoholism respectively, his wife left him for another man (â€Å"Ambrose Bierce†). His struggles with death and the inequity of life are evident throughout his literary works. â€Å"An Occurrence at Owl Creek Bridge† illustrates many of the power struggles that Bierce was fighting throughout much of his life. Much of the first half of the story focuses on the conflict betweenRead MoreAn Occurrence At Owl Creek Bridge By Ambrose Bierce1266 Words   |  6 Pagesâ€Å"An Occurrence at Owl Creek Bridge† is a dubiously vivid and emotionally charged short story genre written by Ambrose Bierce, Originally published in 1890 by the San Francisco Examiner and later collected in his book â€Å"Tales of Soldiers and Civilians†, scholars and critics of his work conclude that this tale is â€Å"Bierce’s most anthologized story.† (Blume 211) Bierce’s experience as a Union Officer and veteran of the Civil War amplifies the credence of transpiring circumstances within its setting. ConsequentlyRead MoreAn Occurrence At Owl Creek Bridge By Ambrose Bierce Essay1499 Words   |  6 Pages For readers, there is a certain level of engaging and compelling material that is demanded from a story, for the time spent reading to be justified. The narrative structure in Ambrose Bierce’s â€Å"An Occurrence at Owl Creek Bridge†, if to be fully understood requires and deserves a vast amount of attention to detail. Once the narrative structure behind the plot is acknowledged and comprehended, only then can the story truly be justified for what is it is: a complex, multi-layered and cleverly deceiving An Occurrence At Owl Creek Bridge By Ambrose Bierce Short stories are defined as pieces of fiction in literature which can easily be read in one sitting. Each short story tends to have a certain meaning or theme behind it, followed by structural elements. These themes and structural elements are significant in impacting one’s reading experience. Each short story is created with the author’s willingness to make you reflect, or think back on your own experiences. â€Å"An Occurrence at Owl Creek Bridge, A Rose for Emily, and The Things They Carried,† are all short stories which involve these specific characteristics. â€Å"An Occurrence at Owl Creek Bridge† by Ambrose Bierce, is a short story about a man named Peyton Farquhar. Also known as the protagonist of the story, he is a thirty-five year old southern planter, land and slave owner, from an Alabama family. This story is divided into three sections which can also be defined as the story’s structural elements. The first section is written by third p erson omniscient point of view, describing what is physically happening to Farquhar. The second section is written by third person limited, because it gives us a few of Farquhar’s thoughts as well as providing us with background information. The third section jumps back to third person omniscient, starting where the first section ended. By using various points of view as well as â€Å"flashback† in achieving the surprise ending, Bierce creates a kind of confusion to the reader, which demonstrates and reflects back on Farquhar’s feelings. TheShow MoreRelatedAn Occurrence At Owl Creek Bridge By Ambrose Bierce1283 Words   |  6 Pages 1. â€Å"An Occurrence at Owl Creek Bridge† by Ambrose Bierce Theme: Time can be the perception of each person at each different event in their life In this story one of the key factors is time and how Farquhar sees it.While mere seconds for the soldiers can be hours for the man about to be hanged, time is perceived to be different for each individual, â€Å"Its recurrence was regular, but as slow as the tolling of a death knell.† The idea that time can feel slower at one point and faster at anotherRead MoreAn Occurrence At Owl Creek Bridge By Ambrose Bierce1283 Words   |  6 Pages 1. â€Å"An Occurrence at Owl Creek Bridge† by Ambrose Bierce Theme: Time can be the perception of each person at each different event in their life In this story one of the key factors is time and how Farquhar sees it.While mere seconds for the soldiers can be hours for the man about to be hanged, time is perceived to be different for each individual, â€Å"Its recurrence was regular, but as slow as the tolling of a death knell.† The idea that time can feel slower at one point and faster at another throwsRead MoreAn Occurrence At Owl Creek Bridge By Ambrose Bierce1538 Words   |  7 Pagesshort story â€Å"An Occurrence at Owl Creek Bridge† by Ambrose Bierce, was a farmer who was rejected from enlisting in the army. The story takes place during the Civil War in the South. Peyton came from a highly-respected family in the southern state Alabama. He was devoted to the southern customs. Peyton unfortunately was unable to enter the war due to certain Circumstances. One day a soldier comes to Peyton’s home. His wife and he help the solider learning about Owl Creek Bridge. Pretty much theRead MoreThe Occurr ence At Owl Creek Bridge By Ambrose Bierce Essay1189 Words   |  5 PagesBlurred line between Reality and Illusion In the story â€Å"The Occurrence at Owl Creek Bridge† by Ambrose Bierce Peyton Farquhar a southern planter is being hung on a railing above the Owl Creek Bridge for interfering with the railroad posted by confederate soldiers. Within minutes before his execution Farquhar begins to have vivid hallucinations about breaking free and escaping. In his story â€Å"An Occurrence at Owl Creek Bridge,† Ambrose Bierce’s theme describes the perception of illusion vs. realityRead MoreAn Occurrence at Owl Creek Bridge, by Ambrose Bierce929 Words   |  4 PagesIn â€Å"An Occurrence at Owl Creek Bridge†, Bierce starts her short story on the edge with Peyton Farquhar, a 35 year old planter from the south, standing on Owl Creek Bridge with his hands tied behind his back and a noose around his neck. There are soldiers from the north surrounding him. Two soldiers, one on each side of him, take away the plank in which he is standing on. Falling to the water, Farquhar foc uses his last thoughts on his family, while also having hopes of freeing his hands and divingRead MoreAn Occurrence at Owl Creek Bridge by Ambrose Bierce1071 Words   |  5 Pagesthe fictional short story, â€Å"An Occurrence at Owl Creek Bridge†, author Ambrose Bierce tells the story of a man who finds himself in such a situation. Part one begins with an unnamed fugitive and a group of Federal Union Soldiers standing on a railroad bridge in Alabama. The story takes place during the American Civil War. The man is a civilian plantation owner who is awaiting execution by way of hanging. As he waits, the man stares down at the water below the bridge thinking about the ways he couldRead MoreAn Occurrence At Owl Creek Bridge By Ambrose Bierce1171 Words   |  5 Pages14 03 November 2014 Blurry Lines Between Reality And Illusion In â€Å"An Occurrence At Owl Creek Bridge† by Ambrose Bierce, the story of a man by the name of Peyton Farquhar whose unlawful actions landed him in a heap of trouble is told. The story is split into three sections which goes back in forth between the past, the present and Farquhar’s falsation of both. By taking the approach of using symbols throughout the story, Bierce gave the opportunity for the reader to feel like they are apart of theRead MoreAn Occurrence At Owl Creek Bridge By Ambrose Bierce Essay1484 Words   |  6 PagesJustifiably Bitter Bierce Ambrose Bierce led a relatively full but tragic life. After losing his sons Day and Leigh to suicide and alcoholism respectively, his wife left him for another man (â€Å"Ambrose Bierce†). His struggles with death and the inequity of life are evident throughout his literary works. â€Å"An Occurrence at Owl Creek Bridge† illustrates many of the power struggles that Bierce was fighting throughout much of his life. Much of the first half of the story focuses on the conflict betweenRead MoreAn Occurrence At Owl Creek Bridge By Ambrose Bierce1266 Words   |  6 Pagesâ€Å"An Occurrence at Owl Creek Bridge† is a dubiously vivid and emotionally charged short story genre written by Ambrose Bierce, Originally published in 1890 by the San Francisco Examiner and later collected in his book â€Å"Tales of Soldiers and Civilians†, scholars and critics of his work conclude that this tale is â€Å"Bierce’s most anthologized story.† (Blume 211) Bierce’s experience as a Union Officer and veteran of the Civil War amplifies the credence of transpiring circumstances within its setting. ConsequentlyRead MoreAn Occurrence At Owl Creek Bridge By Ambrose Bierce Essay1499 Words   |  6 Pages For readers, there is a certain level of engaging and compelling material that is demanded from a story, for the time spent reading to be justified. The narrative structure in Ambrose Bierce’s â€Å"An Occurrence at Owl Creek Bridge†, if to be fully understood requires and deserves a vast amount of attention to detail. Once the narrative structure behind the plot is acknowledged and comprehended, only then can the story truly be justified for what is it is: a complex, multi-layered and cleverly deceiving

Wednesday, May 6, 2020

Agriculture in Schools - 644 Words

Students do not have to be a cowboy to be part of the largest student organization in the entire world! There is a wide range of showing, judging, leadership teams and competitions. Not only that but scholarships! To collages that see students long term goals in agriculture. Most of agriculture students already took a Career Development Collage class before even graduating high school. Having agriculture in schools motivates students to pursue a career in agriculture with FFA, scholarships, and career development. FFA is one of many extracurricular activities students can take in agriculture classes. Just because students are in agriculture or FFA does not mean they are a farmer, wear cowboy boots, and Cinch shirts. It is not only boys in FFA, girls are some of the main participators in agriculture. â€Å"Andrà © Hall lives in the city and has never plowed a field or fed a hog, but she proudly wears the blue jacket long associated with the organization once called Future Farmers of America.† Sometimes students do not know that even in the big city they have resources in agriculture. Agriculture is all around the world. There is a big variety of different activities in FFA, or in agriculture in general. A member of Future Farmers of America, Rebecca Moore, explains she, â€Å"didn’t know what she could raise living in the city,† an agriculture project. Stock showing is almost a sport. People come to watch just like students would at a football game. Students do students be st. The onlyShow MoreRelatedBecoming An Agriculture Teacher At The High School Level Essay1016 Words   |  5 Pageseither Agricultural Education or Biology, so when I chose my major in school, I just picked both. I love social interaction and leaving an impact on someone, however, I love the sciences like biology and chemistry. Throughout my entire high school career, I fell in love with agriculture and Future Farmers of America (FFA), so currently, the career I am looking into with excitement is becoming an agriculture teacher at the high school level. I have researched the field immensely, however, I never formallyRead MoreThe Influence of Agriculture Educator Essay examples1423 Words   |  6 PagesAgriculture Educator In May of 2010 a group of students dressed in blue corduroy jackets came to Athens Christian School to visit during a chapel service. Georgia FFA state officers, Cain and Filipe, spoke about the endless possibilities one could enjoy while in an organization called FFA. These state officers spoke with confidence and excitement as they talked about agriculture playing a vital role in the lives of students. One major concept they spoke about was how in order to be in FFA one hasRead MoreAgricultural Education And Agriculture Education1134 Words   |  5 Pageseducated in agriculture that meant they would end up working with livestock or crops. As I continued on with my education in agriculture, I came to find out that there is so much more when it comes to agricultural education. It is really two parts that came together as one. The first part is agriculture which is the more science based and the second part is education which deals more with involved learning. Both are separate but work together in order to communicate what agriculture is all aboutRead MoreAgriculture Business and Management Essay example942 Words   |  4 PagesI want to major in is Agriculture Business and management. The reason why I want to major in Agriculture Business is because agriculture is an important aspect of every society for its social, economic, and environmental growth. I first heard of this career from my agriculture advisors, at Westminster High School’s farm, when I was being shown a list of jobs and careers that involved agriculture. I was interested in this career because I have a general interest in agriculture and farming, which isRead MoreA Brief Look at Agriculture Education1009 Words   |  4 PagesAgriculture Education Most people do not know that George Strait went to college to be an agriculture educator. George went back to college to get his degree as an agriculture educator in 1978. As an agriculture educator you get the advantage of teaching multiple pathways like plant science, agriculture business, general agriculture, biotech, food products, natural resource, and power technology. With so many pathways there is never on day the same as another. I want to be an agriculture educatorRead MoreGovernment, Schools, and Companies Must Fight Childhood Obesity856 Words   |  4 Pagesthree meals at school. As stated in the article, School Meals Need to Get Healthier: Report published in Healthday, â€Å"About 30.6 million school children participated in the school lunch program in 2007, and 10.1 million children had school breakfasts. In 2007, schools in the program served about 5.1 billion lunches and 1.7 billion breakfasts† (Healthday). This staggering number directly relates to the chil dhood obesity problem in America. There are many people involved in the school lunch and breakfastRead MoreThe Overlooked Area Of Poverty Essay1292 Words   |  6 Pagesof poor people depend on agriculture. The condition of relying on agriculture means that primary source of food and income for those poor people come from agriculture that they have made. Unfortunately, agriculture was not prioritized at the goal and target levels. Agriculture was mentioned at the indicator level under target three of goal eight (Develop a Global Partnership for Development). It was set to measure market access, which was seen as a huge gap that agriculture was overlooked in the MDGsRead MorePersonal Narrative : My Life Changed Forever1249 Words   |  5 PagesOn September 2, 2014, my life changed forever. This was my first year in high school, and as a freshman, I had my very first agriculture class. Throughout the year, I decided that a career in agricultural education would be in my future. I en joy working with students to better themselves and preaching the significance of agriculture. I want to impact the lives of our younger generation just as much as my two agricultural teachers have mine. One day, I looked up the average salary of an agriculturalRead MoreHistory Of Agriculture Education And Ffa1725 Words   |  7 Pagesnever realized that Agriculture Education isn’t just about farming. My mission in life is to represent Agriculture Education and teach others about it and how much it has to offer people. Through the history of Agriculture education and FFA to the unmeasurable effects it has on people. Agriculture education and FFA, go hand in hand together since 1928. Agriculture education has actually been around much longer than FFA because records show that the very first form of agriculture education was fieldRead MoreProposed Defunding Of Agricultural Classes On The Nation s Children1104 Words   |  5 Pagesagricultural classes in his state. Think about this, the governor of a state where one in four jobs in Illinois are directly related to agriculture wants to give a grand total of zero dollars to the Future Farmers of America along with ag classes in general. This is the reason that schools not only should offer agriculture related classes, but in order to graduate from high school every student should at least take one class of ag. At the end of the day all people must know where the nation’s food comes from

Tuesday, May 5, 2020

Risk Of Implementing Block Chain In The Finance Industry - Samples

Question: Discuss about the Risk Of Implementing Block Chain In The Finance Industry. Answer: Introduction Blockchain technologies are the emerging technologies in the word. The market of the blockchain technology has been rising in the market at a decent speed. However, there are various risks involved in the technology. This report focuses on identifying the risk involved in the blockchain technologies in the finance industry. The report outlines the risks assessment procedure in the finance industry. A risk assessment procedure has been discussed in the report for mitigating these issues in the finance industry due to blockchain technology. Blockchain technology According to Zheng, Xie and Wang (2016), blockchain is a digital innovation in the market that is using the concept of the cryptography, networking, data management and incentive mechanism in order to maintain the financial database of different companies in the market. This technology has helped in initiating digital currency transfer between parties. Blockchain has been originated from the bitcoins digital currency. This technology has been implemented in the finance industry in recent years. Figure 1: Blockchain Market in 2017 (Source: Lindman, Tuunainen and Rossi 2017) The market of the blockchain has been rising all over the world due to its capability of digital transfer of virtual currency. As commented by Guo and Liang (2016), blockchain has been regarded as the distributed ledger technology (DLT) that helps in distributing financial assets between parties. As argued by Crosby et al. (2016), this technology has been credited with the highest risks involvement of the finance industry. The virtual currency has no record in the database and a third party vendor to store the information of the parties. According to a survey, over 90 corporations have implemented filed more than 2500 patents against blockchain technology all over the world. Risks and Threats: Regulatory and governance As commented by Lindman, Tuunainen and Rossi (2017), there is a lack of regulatory clarity in the blockchain technology. The regulatory framework of the block Chain technology has been weak including the private network of the parties. The privacy of the parties included in the blockchain technology has been facing various security breaches over the internet. The hackers all over the world are targeting these online transfers of digital currency among the parties. The counter Clearing house and Product (CCP) has been regulating these transaction al over the world. However, these organizations are not safe for the online transaction of digital currency. Privacy and Security As commented by Swan (2015), the use of the block chains haes been emerging all over the world. The privacy and security of the financial documents and assets have not been maintained by the technology. There have been numerous cases of hacking and data breaching over the internet that has been reported. Blockchain uses a shared database that contains all data and information of various parties. As commented by Mougayar (2016), this technology provides a high-speed transfer of digital currency. Crosby et al. (2016) argued that, this concept has minimized privacy and security of data and information of the parties involved in the contract. Therefore, this technology has high-level risks in the finance industry. Behavioural and transactional risks As commented by Lindman, Tuunainen and Rossi (2017), transactions in the blockchain technology have been a huge risks for the investors. The finance industry has been facing a lot of loss in the market due not the technology. However, According to me, blockchain need to use a centralized database instead of the shared database. The firewall of the technology has been weak. This has caused the variety of cyber-attacks in the database. The lack of the third party investors has created problems for the investors, as there is no part for tracking their financial assets. As commented by Guo and Liang (2016), blockchain is not storing the Big Data technology. According to me, adoption of Big Data technology might help in minimizing these risks and threats in the blockchain. The massive redundancy of the technology has been creating issues in the security of financial data and information of the companies. As commented by Swan (2015), instead of storing data on the blockchain, a metadata can be created for maintaining the record of the parties involved. As commented by Guo and Liang (2016), this can ensure an integrity checking if the data and information provided in the metadata. Conclusion It can be concluded that the use of the blockchain technology has helped in increasing the speed of transaction all over the world. However, it has created various risks and threats in the transaction that have been discussed in the report. The use of blockchain technology has been originated from the bitcoins. The market of the Bitcoins has been adopted by various financial companies in the world. References Crosby, M., Pattanayak, P., Verma, S. and Kalyanaraman, V., 2016. Blockchain technology: Beyond bitcoin.Applied Innovation,2, pp.6-10. Guo, Y. and Liang, C., 2016. Blockchain application and outlook in the banking industry.Financial Innovation,2(1), p.24. Lindman, J., Tuunainen, V.K. and Rossi, M., 2017. Opportunities and risks of Blockchain Technologiesa research agenda. Mougayar, W., 2016.The business blockchain: promise, practice, and application of the next Internet technology. John Wiley Sons. Swan, M., 2015.Blockchain: Blueprint for a new economy. " O'Reilly Media, Inc.". Zheng, Z., Xie, S., Dai, H.N. and Wang, H., 2016. Blockchain challenges and opportunities: A survey.Work Pap.2016.