Kerli’s Lectio Praecursoria

Capturing segregation through space and time: New insights from the activity space approach and big data

Lectio Praecursoria in the public examination of Kerli Müürisepp’s doctoral dissertation on 25 November 2023

Photo by Christoph Fink

The city of the twenty-first century is a site of diversity, connection, and opportunity.

Cities have never been as diverse as today in ethnic, socio-economic and demographic terms, nor with regard to attitudes, lifestyles and activities.

Much of that diversity is the outcome of the increasing mobility and migration of people, both within and across countries. The United Nations has estimated that over 280 million people live outside of their home country – this is more than half of the population of the European Union.

In Finland, the share of foreign-background people is still rather modest compared to its neighbours – Estonia and Sweden – and compared to many other European countries. Yet, roughly half of Finland’s foreign population live in the Helsinki region and the share is in rise. Undoubtedly, the Helsinki Metropolitan Area, has become a site of diversity.

Often, people move to cities with the hope for attaining better education, advancing in their career, and improving their quality of life. And they rightly do so – social diversity creates the values and the benefits of the contemporary city. By bringing different groups together and fostering connections between them, the socially diverse city ought to reduce prejudice and foster social cohesion; promote creativity, innovation, and economic performance. The socially diverse city ought to ensure social mobility – that is, provide equal opportunities to advance in life for all of us, regardless of our backgrounds.

What an ideal city it is.

But, the reality is far more complicated – the city is far from being ideal, is far from providing equal opportunities for all.

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Kerli Müürisepp successfully defended her PhD thesis – Mei-Po Kwan as the opponent!

Kerli successfully defended her PhD thesis on Saturday, 25 November! What a blast the day was for the entire Digital Geography Lab!

The defence took place on Saturday, 25 November 2023, with Professor Mei-Po Kwan from the Chinese University of Hong Kong as the opponent. The defence started with Kerli’s Lectio Praecursoria, and continued with a discussion with the opponent about Kerli’s thesis, the research topic at large and included even bursts of laughter in the middle of otherwise serious academic debate.

See Kerli’s thesis here: Capturing segregation through space and time: New insights from the activity space approach and big data”. Kerli’s work was supervised by Dr Olle Järv, Prof Tuuli Toivonen, and Prof Tiit Tammaru.

On Friday before the defense, we had the honour of hosting the opponent, Professor Mei-Po Kwan, at the University of Helsinki. She gave an exciting talk for a broad audience on-site and online, with the title “Big Data and Geospatial Technologies for Health Research“.

The busy days culminated in the cheerful Karonkka party on Saturday evening with senate square views. To rest a bit, we all had a day off on Monday.

Cheers once more & hugs to brilliant Kerli! 🥳🤗

And many thanks also to the opponent, Prof Mei-Po Kwan, for visiting us and leading the discussion with academic expertise and curiosity, in a cheerful spirit! 🤗

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Kerli Müürisepp defending on 25 November at 11!!

Kerli Müürisepp will defend her PhD thesis titled

Capturing segregation through space and time: New insights from the activity space approach and big data

Time: Saturday 25th November, 11 o’clock  (note the unusual start time!)
Place: Porthania P674, Yliopistonkatu 3, Helsinki

Stream: https://video.helsinki.fi/unitube/live-stream.html?room=l23

Professor Mei-Po Kwan from The Chinese University of Hong Kong (CUHK) will act as the opponent and professor Tuuli Toivonen as the custos.

The thesis is available in HELDA:  http://hdl.handle.net/10138/566813

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The Digital Geography Lab is an interdisciplinary research team focusing on spatial Big Data analytics for fair and sustainable societies at the University of Helsinki.

 

Mei-Po Kwan visiting DGL and talking at the University of Helsinki

Prof. Mei-Po Kwan from the Chinese University of Hong Kong on Friday 24.11. (13:15 – 14:45) taking place in Porthania PIII, University of Helsinki.
You can join in person or online. Some wine will be served after the presentation 😊

Please register here to get the online link or a glass of wine onsite!

Title: Big Data and Geospatial Technologies for Health Research

Abstract: The rapid development and widespread use of advanced geospatial technologies such as GPS, remote sensing, mobile sensing, and location-aware devices in recent years have greatly facilitated the acquisition of enormous amounts of high-resolution space-time data. To build smart and healthy cities, we need to integrate these multi-source geospatial big data acquired by earth observation technologies and mobile sensing technologies to provide more accurate assessments of individual exposures to environmental or social risk factors, and to develop planning policies to improve health for all. In this presentation, I will discuss how these new developments can provide new insights into the relationships between people’s mobility, health behaviors, and the complex spatiotemporal dynamics of environmental influence Drawing upon my recent projects on individual exposures to green/blue spaces, light-at-night, and air and noise pollution, I explore how the collection, integration, and analysis of high-resolution space-time data enabled by advanced geospatial and mobile technologies (e.g., real-time mobile sensing and GPS tracking) can help identify the “truly relevant geographic context in space and time” and provide new insights into the relationships between human health, people’s daily mobility, and the complex spatiotemporal dynamics of environmental influences.

Speaker’s Bio: Professor Kwan Mei-Po is Director of the Institute of Space and Earth Information Science, Director of Institute of Future Cities, Choh-Ming Li Professor of Geography and Resource Management, and an affiliated faculty of the JC School of Public Health and Primary Care of the Chinese University of Hong Kong. Prof. Kwan is a Fellow of the United Kingdom Academy of Social Sciences, Fellow of the American Association for the Advancement of Science (AAAS), Fellow of the Royal Geographical Society and American Association of Geographers and a Guggenheim Fellow. She was awarded many Outstanding Academic Achievement Awards by the American Association of Geographers, including the Distinguished Scholarship Honors, the Anderson Medal of Honors in Applied Geography, the Wilbanks Prize for Transformational Research in Geography, the Stanley Brunn Award for Creativity in Geography, the Edward L. Ullman Award for Outstanding Contributions to Transportation Geography, and the Melinda Meade Award for Outstanding Contributions to Health and Medical Research. Prof. Kwan has received research grants of more than USD 62.7 million and has delivered about 380 keynote addresses and invited lectures and presentations in more than 20 countries. Her recent projects examine the health impacts of individual environmental exposure (e.g., noise, air pollution, green space), urban and mobility issues, the space-time dynamics of the COVID-19 pandemic and the perception of data privacy; and the protection of geoprivacy via the development of a Geospatial Virtual Data Enclave (GVDE).

This talk is part of the activities of the Location Innovation Hub and the Finnish University Network for Geoinformatics (FIUGINET) GeoSPA Talks series.

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The Digital Geography Lab is an interdisciplinary research team focusing on spatial Big Data analytics for fair and sustainable societies at the University of Helsinki.

 

Väiski’s Lectio Praecursoria

Tuomas Väisänen has defended his PhD “Diversity of places and people: Using big data to understand languages and activites across geographical space” successfully on Friday the 10th of November. His opponent was associate professor Grant McKenzie from McGill University, Canada. In case you missed the event and want to read the Lectio Praecursoria, you can find it below.

Cover of Väiski's PhD

Väiski’s Lectio Praecursoria:

Cities are home to over half of the human population. 

The number of people living in cities is increasing at an unprecedented scale due to accelerating growth of urbanization, international migration, and mobility. These global megatrends are further intensified by climate change and biodiversity loss. 

Today, 56 % of the world’s population lives in cities. The United Nations estimates that by 2050, this percentage has increased to 70 %. This will place immense pressure on cities to provide housing, employment, and services for a growing number of inhabitants. 

At the same time, the cities are not only becoming more populous, but the populations living in cities are becoming more diverse.  

More people of increasingly varied cultural, ethnic, and socio-economic backgrounds are interacting in cities than ever before. Accordingly, researchers in the last 15 years have recognized that variables commonly used to describe population diversity in the past, such as countries of birth or origin, or ethnicities of the individuals, are not adequate for assessing the new patterns of diversity present in contemporary urban populations. 

Recent research has thus called for characterizing urban populations as being “super-diverse.” That is, the populations are diverse across multiple variables at the same time, such as ethnicities and countries of origin, but also religions, languages, gender, age, socio-economic and immigration statuses.  

As you might have observed from the title of my work, in my thesis I focus on exploring diversity from the perspectives of languages and activities. 

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Väiski defended his PhD thesis – Grant McKenzie as opponent

Tuomas Väisänen aka “Väiski” successfully defended his PhD thesis last Friday!

The defence took place on the Friday 10th of November 2023 with Grant McKenzie, Associate Professor of Spatial Data Science from McGill University, Canada as the opponent.

See Väiski’s thesis “Diversity of places and people: Using big data to understand languages and activities across geographical space” here.

Earlier in the week, we had the privilege of hosting the opponent McKenzie at our premises and getting to know each other and our respective research groups’ works better, which sparked many new ideas.

The event-packed week culminated with Väiski’s defence and his lovely Karonkka party that followed in the evening.

Finally, after a long and exciting week, our happy new doctor was sent to home with celebrations to enjoy his wonderful achievement.

Hooray & hugs to Väiski! 🥳🤗

And many thanks also to the opponent McKenzie for visiting us and acting as the excellent counterpart for Väiski! 🤗

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Tuomas Väisänen aka Väiski defending his PhD 10 November at noon!

Tuomas Väisänen will defend his PhD thesis titled

“Diversity of places and people: Using big data to understand languages and activities across geographical space”

Time: Friday 10th November, 12 o’clock noon
Place: the Festive hall (Juhlasali) of Language Center (Kielikeskus), University of Helsinki.

Stream: https://video.helsinki.fi/unitube/live-stream.html?room=l13

Associate professor Grant McKenzie from McGill University will act as the opponent and professor Tuuli Toivonen as custos.

The thesis is available in Helda https://helda.helsinki.fi/items/3b464817-3408-414b-9670-f417fce5a6f0

 

Also:

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Tuomas’s opponent associate professor Grant McKenzie will give a talk with the title

“Place, Privacy, and Mobility: Navigating the Intersection of Location Science and Human Dynamics”

Time: Wednesday 8th November 10-12
Place: University of Helsinki, Kumpula Campus, Exactum B123

Register for the stream link: https://forms.gle/xJh8r2zjsCSRWFZH7

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You are most welcome to both events!

November comes. Looking back on #30DayMapChallenge 2022

#30DayMapChallenge was started in 2019 on Twitter by Topi Tjukanov. This daily mapmaking challenge takes place each November, bringing together people passionate about mapping science and art. Maps can be found on Twitter and other platforms using the #30DayMapChallenge hashtag. While the DGL is preparing for the new season in 2023, we suggest checking out the maps that the lab members made almost a year ago.

Day 1, Points. 

Commuting in the Greater Region of Luxembourg: tweets posted alongside railways and roads. Author: Oleksandr Karasov

Day 2, Lines.

Interpolated homogeneity in the Google Street View landscape depictions. Author: Oleksandr Karasov

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GREENTRAVEL project in full swing!

We are having exciting times at the Digital Geography Lab! 2023 marks the start of the European Research Council -funded project “Greener Urban Travel Environments for Everyone: From measured wellbeing impacts to Big Data analytics” (GREENTRAVEL) – the biggest and longest research project of the lab to date. After months of planning and recruitments, we are happy to announce that the GREENTRAVEL project team is complete, and the project is running at full speed.

The transdisciplinary GREENTRAVEL project runs until 2027 and has a budget of 1.98 million euros. The project focuses on studying the greenery of urban travel environments from various perspectives. More specifically, the project has set out to produce a novel understanding of the quality, availability and wellbeing impacts of green urban travel environments. Moreover, it will produce knowledge on how equally green exposure during travel and related wellbeing impacts are available to urban populations. Ultimately, the project will provide approaches and analysis on where to add greenery to advance equity. The project is led by professor Tuuli Toivonen.

The GREENTRAVEL project team. Photo by Christoph Fink.

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URBANAGE workshop as part of the European Researchers’ Night

Last week, the Digital Geography Lab organised a workshop for the European Researchers’ Night (Tutkijöiden Yö), one of only five to be hosted by the University of Helsinki’s evening programme at the Helsinki Observatory in the city centre.

At our workshop, we engaged visitors with concepts around urban accessibility, such as multimodal travel times in the Helsinki metropolitan area, one’s personal 15-minute city, and mobility justice between different groups of residents and between different neighbourhoods.

Two visitors lean over a large map (1.5 x 3.5 metres) of the Helsinki metropolitan area, drawing the area covered by 15 minutes walking around an important location to their lives
Two visitors explore how large their personal 15-minute neighbourhood (around a place important to their lives) is.

Together with a fantastic team of students, we prepared three interactive tasks for the visitors of the event, that targeted the general public, and was met with ample interest.

At one station, visitors were asked to locate a place important in their everyday lives on a large printed map, and mark it with a small sticker. Next, they would draw their estimate of how far they would reach around this point within 15 minutes, walking. For the next step, we prepared a piece of string that we measured and cut to represent the exact distance an average healthy adult would walk in those 15 minutes. Laying it along the streets and paths in the map, the visitor could then draw the area they can reach precisely into the map, adding to the personal accounts of numerous other visitors before them. Finally, we asked visitors to reflect whether or not the identified area contained all services they needed to access in their everyday lives, such as grocers, libraries, pharmacies, and public transport stops.

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