Wednesday, December 03, 2025

 

Before the party starts: Parental attitudes linked to college binge drinking




Washington State University





PULLMAN, Wash. — College students who binge drink may be acting on influences they brought from home, a new Washington State University-led study suggests.

A recent survey shows that students who binge drink more than other students tend to have grown up in a home with more permissive attitudes toward drinking. Those students are also more likely to join Greek-affiliated organizations like fraternities or sororities.

In a study published in the journal Behavioral Sciencesresearchers surveyed parents and students about drinking attitudes and behaviors, especially binge drinking. They found that parents of students who joined fraternities or sororities were more permissive of alcohol use prior to students leaving home for college.

“Previous research has shown that greater parental permissiveness, or approval, of student drinking is linked to greater alcohol use among college students,” said Kristi Morrison, lead author on the paper and a PhD student in WSU’s prevention science program. “We explored the relationship between parental approval and student Greek affiliation and found that parents of students who join Greek organizations tend to be more permissive of binge drinking even before their students come to college.”

Students who join fraternities or sororities are at a higher risk of binge drinking and the negative consequences, such alcohol poisoning, blacking out, and more, that can follow, Morrison said.

“Understanding risk factors, like parental permissiveness, gives us targets for interventions that can reduce risky behavior,” she said.

Morrison and her co-authors asked parents, both before their students left for college and during their first year of college, how wrong they felt it would be if their student engaged in “heavy episodic drinking,” defined as four or more alcoholic drinks on one occasion for women and five or more for men. The researchers also asked students about their perception of their parents’ permissiveness.

“The initial transition to college is a very high-risk time,” said Jennifer Duckworth, paper co-author and assistant professor in WSU’s Department of Human Development. “Studies like this can help universities identify areas where interventions can be developed and implemented to reduce binge drinking.”

Morrison and Duckworth suggest that parenting programs that encourage parents to set clear guidelines, especially before students leave home, support their children’s decision-making, and talk about the risks of binge drinking could positively impact students. They pointed to the Letting Go and Staying Connected program, which originated at WSU and has spread to nine other universities across Washington, as an important tool for educating parents.

“Risk factors look different across groups,” Duckworth said. “Parental permissiveness is one risk factor that can be changed relatively easily. It’s important to help parents think about what it means to be less permissive toward alcohol use. When parents talk with their children about the risks of binge drinking and set clear expectations, it can have a real impact. Even after students leave home, parents continue to play a powerful role in shaping how young adults approach drinking.”

Even well-intentioned efforts to promote “safe” drinking can sometimes send the wrong message, signaling that binge drinking is acceptable.

“Parents may think having their teens drink at home in a protected environment is safer, but it conveys an approval of alcohol use,” said Morrison, who plans to earn her doctorate in two years. “Research shows that when parents are less approving of alcohol use, students tend to drink less.”

Additional co-authors on the paper include Brittany Cooper and Laura Hill from WSU, Matthew Bumpus from the Innovia Foundation, and Martie Skinner and Kevin Haggerty from the University of Washington.

 

Building better, building beautiful



Novel method allows more architects to design attractive gridshell structures




University of Tokyo

A gridshell design example 

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An example of a gridshell with a topologically irregular boundary shape computed with the proposed system. ©2025 Masaaki Miki and Toby Mitchell CC-BY-ND

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Credit: ©2025 Masaaki Miki and Toby Mitchell CC-BY-ND




A researcher from the University of Tokyo and a U.S.-based structural engineer developed a new computational form-finding method that could change how architects and engineers design lightweight and free-form structures covering large spaces. The technique specifically helps create gridshells, thin, curved surfaces whose members form a networked grid. The method makes use of NURBS surfaces, a widely used surface representation format in computer-aided design (CAD). It also drastically reduces computation cost — a task that previously took 90 hours on a high-end GPU completes in about 90 minutes on a standard CPU.

Architects pay particular attention to surfaces capable of supporting their own weight. Some aesthetically pleasing structures are called shells, traditionally realized as reinforced concrete shells. However, contemporary architects aim to reduce the use of concrete due to costs and wastage, and also as they wish to use more attractive materials, including glass. This has encouraged architects to explore what are known as gridshell designs, architectural structures made from intersecting curved metal, glass or timber sections that span wide spaces without internal supports.

Gridshells are good for covering large public spaces without the use of interior columns, such as train station entrance halls, renovated courtyards of historic buildings, and public plazas. Familiar examples include the British Museum’s Great Court, the Dutch Maritime Museum’s glass roof and Moynihan Train Hall in New York. These projects demonstrate the potential of gridshells, but until now, there have been no standardized computational methods capable of efficiently handling the full range of possible shapes that architectural designers may wish to create.

Masaaki Miki from the University of Tokyo and Toby Mitchell, who works at U.S.-based engineering firm Thornton Tomasetti, teamed up to develop a technique that gives architects and engineers more creative freedom. Their new algorithm finds the optimal shapes of gridshells, capable of handling complex shapes without sacrificing robustness.

Though precedents of gridshell projects exist in the world, various constraints from geometry, mechanics, fabrication and construction required to create them have made gridshells impractical for most clients. Miki and Mitchell previously developed a novel NURBS-based method that solves these constraints within a single universal computational framework. However, two key barriers remained: Their previous algorithm could not handle highly irregular shapes, and the computational cost was unrealistically high. Their new method overcomes these barriers, leading to a more accessible and efficient design process, opening up advanced gridshell form-finding to a broader range of designers and architects.

“The project began in 2020 with an interest in shell structures, often made of concrete. Traditional designs aim for shapes that carry their own weight entirely through the force of compression, but this limits how expressive or sculptural they can be,” said Miki. “We set out to find new ways to design shells that consider forces of compression as well as tension, allowing greater design freedom. We adapted our approach to more modern metal-and-glass gridshells, developing methods to balance mechanical reliability, aesthetics and ease of construction. Recent advances in computational speed have made it possible to solve such complex conditions using rigorous methods.”

The major advantage of their method is that it directly operates on NURBS surfaces. Unlike conventional mesh-based modeling that uses thousands of triangular facets, NURBS offer smooth, continuous and mathematically precise surface representations. More importantly, NURBS surfaces are also standard in architectural design. The team integrated their method with an application called Rhinoceros, a popular NURBS-based CAD package, as a plug-in. This means the approach can more easily become part of an architectural designer’s regular workflow.

The core idea of their approach is to represent the distribution of stress using a NURBS surface and some novel algorithms which speed up computation by a dramatic 98%. This increase eliminates the need for high-end GPUs, providing a more accessible method for generating geometrically and mechanically sound gridshells. It also ensures output forms are rigid under gravity and ultimately offers a metal-and-glass construction system which is easy to construct.

“Because we are addressing a real-world problem, we have been rigorously validating our solutions by several test methods we also developed,” said Miki. “When the tests revealed failures in the method, it was stressful. However, we are now totally happy because all solutions pass the tests.”

While the current work focuses on metal-and-glass gridshells, the researchers also aim to extend the method to composite timber gridshells in the future.

Thanks to computer numerical control (CNC) fabrication technologies, the method may also be applied to design-laminated timber gridshells. ©2025 Masaaki Miki and Toby Mitchell CC-BY-ND

Credit

©2025 Masaaki Miki and Toby Mitchell CC-BY-ND 

Proceedings: Masaaki Miki and Toby Mitchell, “NURBS-Based Grid Shell Form Finding on Domains with Topologically Arbitrary Boundaries”, Transactions on Graphics Siggraph special issue, DOI:10.1145/3763284, https://www.mmiki.jp/home/project-kannegon


Funding: This research was partially supported by the Nomura Foundation, the JSPS Grants-in-Aid for Scientific Research (KAKENHI; grant number 23K17784), and JST ASPIRE (grant number JPMJAP2401).

 

Useful links:

Graduate School of Arts and Sciences - https://www.c.u-tokyo.ac.jp/eng_site/

Masaaki Miki - https://www.mmiki.jp/

Thornton Tomasetti - https://www.thorntontomasetti.com/


Research contact:

Assistant Professor Masaaki Miki

Graduate School of Arts and Sciences, The University of Tokyo

3-8-1 Komaba, Meguro-ku, Tokyo, 153-8902 Japan
masaakim@g.ecc.u-tokyo.ac.jp


Press contact:
Mr. Rohan Mehra
Strategic Communications Group, The University of Tokyo,
7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
press-releases.adm@gs.mail.u-tokyo.ac.jp
 

About The University of Tokyo:

The University of Tokyo is Japan's leading university and one of the world's top research universities. The vast research output of some 6,000 researchers is published in the world's top journals across the arts and sciences. Our vibrant student body of around 15,000 undergraduate and 15,000 graduate students includes over 5,000 international students. Find out more at www.u-tokyo.ac.jp/en/ or follow us on X (formerly Twitter) at @UTokyo_News_en.

 

Vibrating tools carve custom functional surfaces with precision and flexibility





International Journal of Extreme Manufacturing

Schematic of tip-based vibration carving and convex microstructure processing results 

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By regulating the vibration trajectory, shape-customized convex microstructures of various shapes such as rhomboid-shaped, cone-shaped, and shell-shaped can be processed flexibly.

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Credit: By Jiahui Liu, Pingfa Feng, Hansong Ji, Jianfu Zhang, Xiangyu Zhang and Jianjian Wang*





In International Journal of Extreme Manufacturing, researchers at Tsinghua University have introduced a novel tip-based vibration carving (TVC) methods to create tiny and custom-shaped bumps, known as convex microstructures, on material surfaces. These structures can change how a surface interacts with environments, making them important in applications such as heat exchangers, anti-icing coatings, sensors, and water-repellent materials.

Such structures are common in nature. Plant leaves, insect wings, and fish scales all have small surface features that help control friction, guide water, or manage heat transfer. Scientists and engineers have tried to make similar structures on man-made surfaces, but it has been difficult to achieve high precision, diverse shapes, and fast processing at the same time. This has limited the flexibility needed for more advanced surface design.

To bridge that gap, this novel TVC methods combines two previously separate ideas: using a sharp tool tip to carve very small features, and vibrating the tool at high speed to increase throughput. During processing, the tool tip vibrates parallel to the material surface. With each vibration cycle, a small amount of material is removed or pushed aside, leaving behind a tiny bump.

By changing the vibration path, the researchers created three different bump shapes that resemble rhomboids, cones, and shells. These shapes can also be combined in any pattern, instead of being repeated in a uniform way, and offer more design freedom.

To help users apply the technology, the team developed a mathematical model that predicts how the final shape will change when different process settings, such as vibration amplitude or carving speed, are adjusted. They confirmed the accuracy of the model through simulation and machining experiments.

Tests showed that the TVC method works well on soft plastic materials and still performs effectively even when the tool becomes worn. The processed surfaces also showed signs of grain refinement beneath the carved area, suggesting a potential strengthening effect. After a simple surface treatment, the textured samples became highly water-repellent, with water droplets forming contact angles greater than 150 degrees.

"We hope this method gives engineers more freedom and efficiency when designing functional surfaces," said Prof. Jianjian Wang, the study's corresponding author. "Surface performance does not only depend on how smooth it is. With suitable micro-shapes, surfaces may gain abilities that they did not originally have."

Looking ahead, the team plans to explore more complex vibration paths to produce an even wider range of surface shapes. They believe TVC could be applied in areas where control of surface-environment interaction is critical, including thermal management, sensing, microfluidics, and optical devices.


International Journal of Extreme Manufacturing (IJEM, IF: 21.3) is dedicated to publishing the best research related to the science and technology of manufacturing functional devices and systems with extreme dimensions (extremely large or small) and/or extreme functionalities

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