Venkat Bathina, Rongtin Jin, Faustin Kapelemba, Mobolaji Olagbaju, Sana Rizwan
Big data refers to the capacity to collect and aggregate massive datasets and similar information this is what is “big” about the phenomenon, as opposed to, well, just data. An exabyte is one billion gigabytes and a gigabyte is about the amount of data it takes to digitally store a feature-length movie.
Volume - The amount of data matters. With big data, you’ll have to process high volumes of low-density, unstructured data. This can be data of unknown value, such as Twitter data feeds, clickstreams on a web page or a mobile app, or sensor-enabled equipment. For some organizations, this might be tens of terabytes of data. For others, it may be hundreds of petabytes.
Velocity - Velocity is the fast rate at which data is received and (perhaps) acted on. Normally, the highest velocity of data streams directly into memory versus being written to disk. Some internet-enabled smart products operate in real time or near real time and will require real-time evaluation and action.
Variety - Variety refers to the many types of data that are available. Traditional data types were structured and fit neatly in a relational database. With the rise of big data, data comes in new unstructured data types. Unstructured and semi-structured data types, such as text, audio, and video, require additional preprocessing to derive meaning and support metadata.
Challenges involving Big Data include: sampling errors (uncertainty), big data requires a researcher to have specific computer skills to access and analyze the data (skills), there is a lack of standardization of methods for collecting and analyzing big data (standard), accessing big data sources is not free (cost).
Structured Data is all our quantitative data, such as Age, Billing, Contact, Address, Expenses, Debit/credit card numbers.
Unstructured Data is all our unorganized data. The consensus is no more than 20% of all data is structured.
Ron Galperin is the 19th Controller of the City of Los Angeles, elected in 2013 and again in 2017. Galperin launched ControlPanel LA, the City’s first open data portal, in 2013. It features details on the goods and services Los Angeles buys, along with information on assets and liabilities, employee compensation, operating indicators and much more.
Numerous financial and performance audits focused on improving the efficiency and accountability of City government — and on delivering quality neighborhood services. These audits are improving street maintenance, homeless housing and outreach, arts funding, management of the City’s special funds, the Dept. of Water and Power, workers’ compensation costs, development fees, airport operations, L.A.’s trees, emergency services and much more.
US Census Bureau
Housing Authority of the City of Los Angeles
Construction Industry Research Board
ControlPanel LA
Other Public & Private Entities
Brick-and-Mortar Metrics: On a structural level, data quality and integrity poses a basic challenge, as does the perennial risk that policies driven by what can be measured, such as bricks-and-mortar metrics, will inherently misdirect resources away from goals that are less quantifiable, such as policies that reflect the felt experience of people living in communities of concentrated poverty. These are very important core metrics and the fact that the Department has set clear, quantifiable goals around its central mission is commendable. HUD Measures: Nevertheless, these output measures say relatively little about the lives of the people in the housing, or the larger community impacts of the housing investments and other policy interventions, e.g. the production of rental units.
"Each year, an untold number of Americans are evicted or otherwise forced to leave their homes involuntarily. The number is likely in the many millions, but we have no way of gauging even a modestly precise figure for renters, because such data are simply not collected on a national basis or in any systematic way in most localities where evictions take place."
Privacy and Data Security: Everything can be captured in a digital format to create complete datasets that offer a full picture of each individual case by merging e-mails, multi-media (photos, videos, audio recordings), scanned documents and e-forms.
Measurability Privileged Over Meaning: A genuine risk that the very people whose lives should be at the center of affordable housing policy will be even more marginalized than they currently are when measurability is privileged over meaning.
Three mega trends are shaping the mobility market: the rise of connected mobility, the convergence of transport and automotive, and the decline of traditional industries. New entrants and startups are entering the market at a time when traditional players are looking to expand and diversity their footprints. As new forms of mobility become more prevalent, The need for sustainable transportation solutions becomes more critical.
The future of mobility is characterized by a reduction of greenhouse gas emissions, better health outcomes, and lower operating costs. These advances are designed to disrupt the ecosystem, but in combination, they should propel unprecedented change. They will allow us to move from a vehicle-centric system to a new ecosystem with a dynamic and efficient consumer base at its heart. Mobility does not appear to be the same across regions. Although some regions have better mobility than others, those with scarce mobility tend to experience limited development. This is because mobility is a key indicator of economic development.
Historically, the transportation industry has operated along largely linear value chains. This is all changing. Various sectors are converging, eager to seize revenue opportunities in a new mobility ecosystem. The result is a complex web of interconnected value chains.
Transportation provides various economic activities with the ability to reach their workforce and suppliers. The cost of distribution is usually lower due to the reduced need for transportation.
There are variations in the propensity, intensity, and scale of mobility which is linked to differences in the availability of transportation resources, including infrastructure.
Transportation is not a homogeneous system, but as a set of diverse elements at times in competition. Access and services are not uniform. While many of the social and economic impacts of transportation are positive, there are also significant societal challenges.
For many people, public transportation is their only option when it comes to getting to work. For those without a car, buses and trains are their only options.
Established rail lines, including the Red, Purple, Green, Orange and Blue Lines, are currently experiencing multiyear ridership increases. L.A. County also has an extensive bus transit network; Metro alone has 1,950 buses operating on weekdays, serving 169 Metro operated routes and over 15,000 bus stops. Bicycles are also common in the city as it is one of the main transport modes for short trips and to transfer between different modes, hence acting as a connecting transportation unit.
Transit becomes a preferred option for people with limited mobility. It can also move goods and materials that are often transported thousands of miles away. The goods movement industry is integral to our economy and provides employment opportunities for thousands of individuals.
Over time, the popularity of various transportation modes has varied. In the future, more people will rely on public transportation systems to get around efficiently and with minimal interference.
Infrastructure can be broadly defined as a series of systems, facilities, and/or structures that supports the functionality of a household, industry, or institution. Infrastructure can also be classified in a myriad of other ways, including: Hard and Soft; Economic, Institutional, Social, Sustainable, Core. Regardless of the classification, the universal goals of infrastructure building in places remain human development, economic growth & poverty alleviation, safety, travel, climate-proofing, innovation, the accumulation of soft power.
Social Housing development is an infrastructure choice that is largely dictated by the political economy and existing living conditions found in the associated state.
Social Housing developed as a response to squalid living conditions and general unaffordability in urban areas. Changing labor dynamics were also a factor.
Late 19th and early 20th century states controlled resource allocation in addition to having greater command of the economy’s objectives, but the mechanisms for achieving this large expansion in housing investment differed across countries who invested resources to Social Housing.
The factors that influence the implementation of Social Housing include Governance & Regulatory Policies, Financial & Economic Constraints, Political Factors, Planning & Design, Varying Levels of Public Input, Risk Perceptions, Environmental Factors, etc.
The United States’ Public Housing journey began with the Housing Acts of 1937 and 1949, from the “New Deal” and “Fair Deal” of the Roosevelt and Truman administrations respectively. The key distinction between US public housing and global social housing was the target demographic: in the US, housing programs were explicitly designed for people of low-income and managed through local public housing agencies/authorities. Slum eradication and the removal of unsanitary housing were also paramount goals and often the premise for new housing.
Politics, race, private sector concerns were salient factors during this period. Article 34 of the California Constitution was a major outcome. The “Red Scare” froze Los Angeles public housing construction in the mid-1950s, the city refused to receive more money from the federal government.
The current model for providing public/affordable housing is more market-oriented today, with an emphasis on housing vouchers, affordable unit quotas, rent caps, etc.
These remain a very small share of the overall housing market in Los Angeles.
Past disadvantages mean that the housing market shortage is more acute.