Sohyun Jin
💾️  

Recent Projects



Professional Experience

Associate Architect, AWA Architects (2021-2022)

Registered Architect, Korea Institute of Registered Architect (KIRA) (2019)

Project Manager at Ublo | Façade Designer, VS-A Korea (2018 - 2021)
Role:
Product R&D
: mold design, performance test, glass structure calculation, patent.
Communication
: website design, production management, façade design and consulting.
Research
: Smart Ublo; Ventilation Sensor Phase 1


Junior Architect, Designcamp Moonpark dmp (2015 - 2018)
Role:
Complex geometry 3D drafter
, shape optimization & rationalization, concept design, schematic design, design development, construction document

Junior Architect, The System Lab (2014)
Role:
Organic form finding
mainly with T-splines of Rhino plug-in, 3D printing with post-processing.

Building Engineer Qualification, Human Resources Development Service of Korea(2013)

Intern, Il Hoon Roh Studio (2014)


Awards and Scholarships

Outstanding Performance Commendation, Carnegie Mellon University (Spring 2024)

SoA Merit Scholarship, Carnegie Mellon University (2023 - 2025)

Grand Prize, “Urban Jungle Gym”, Posco Steel Design Festa, POSCO (2013)
Urban Jungle Gym
, in collaboration with two members, a steel design competition
Role: Leader, speaker team arrangement, design development, coordination.

First Place, “A Way to Han River “, B.Arch Graduation Thesis, Yonsei University (2013)
A way to Han river
, Solo work

Honorable Mention, “Overhead Tensegrity”, Korean Structural Engineers Competition (2012)
Overhead tensegrity
, in collaboration with two members, a competition of structure design
Role: Design development, production.

Full Scholarship, National Engineering Scholarship, Korea Student Aid Foundation (KOSAF) (2008-2013)

Full Scholarship, Yonsei Eagle Scholarship, Yonsei University (2008)


Lectures and Conference Presentations

Guest Instructor, “Kinetic Architecture”, Soongsil University, Korea (Nov. 2021)

Guest Instructor, “Introduction to Architecture Design Practice”, Soongsil University, Korea (April 2021)
Webinar Speaker, “Personalized Ventilation Windows R&D”, Zak World of Façades, Virtual Conference (Aug 2020)
On behalf of VS-A Korea, Delievering a presentation of
VS-A Group research project
, the customized design window Ublo and Ufo, named after Uf=0, meaning u-value for frame is Zero.
Conference Exhibitor, “Ublo and UF0, two innovative façade components” , Glass Performance Days(GPD), Tampere, Finland (June 2019)
Participated as a UBLO engineer at an expo booth
Introduced the system to visitors, built networks for future partnerships in related industries, and sought opportunities with distributors abroad.


Publications

Sohyun Jin. “The Works of Rookies.” A&C Architecture Magazine vol.391, Dec. 2013, pp.191.
One of six selected graduation theses
of 2014

Sohyun Jin. “2013 Posco Steel Design Festa.” C3 KOREA vol.349 supplement, Sep. 2013, pp.16-17.
A winning design proposal
of the Posco steel design competition


Courses and Workshops

Workshop: Digital Form Finding, “Virtual Actuality” (2012)
Algorithmic design
workshop via Processing
Yonsei University

Design Studio: “Incremental Bridges” (2011)
Design proposal
in Batam, Indonesia


Exhibitions

Exhibition, “Urban Jungle Gym”, as a competition winner, Posco Center Building and Posco A&C Building, Seoul (2013)
Space frame configurations with reusable units


Exhibition, “Folding chair”, Mirae Asset Center1, Seoul (2013)
Foldable cardboard chair

Minimum Spanning Tree vs. Maximum Spanning Tree

How to create efficient unrolling segmentation for hemisphere?

Spring 2024

@Generative systems for design, 62-706, Carnegie Mellon University

Implementation tool: Grasshopper, Rhino3D

Instructor: Jingyang (Leo) Liu
Collaboration: Sherry Yujin Wu

We planned to test two folding methods using IVY plug-in in Grasshopper which has Minimum Spanning Tree component.


 Often, running a minimum spanning tree algorithm on the weighted mesh graph helps optimize for various global properties. One criterion often considered is the dihedral angle, which denotes the angle between two connecting faces. However, it’s unclear to the team how minimizing the dihedral angle actually impacts the assembly experience. To investigate further, we designed a special hemisphere and unrolled its meshes by employing both maximum and minimum spanning tree algorithms. These unrolled meshes were then printed on a suitable material and assembled, aiming to gain insights into the practical effects of minimizing the dihedral angle.

Finding the facet angle difference using Polygon meshing parameters
Maximum angle is 50 degree(left) 30 degree(right) respectively





Mesh study, finding the tendency


While generating polygon mesh based on hemisphere shape, we tested the base shape with Rhino’s polygon meshing parameter. We observed that vertical facet angles are usually bigger than horizontal facet angles. The images left show this tendency.

Definition of Dihedral angle




Segmentation of hemisphere



Same angle division in the vertical section. (Left)
The actual spiral shape consisting of facets with small angular difference. (Right)

Define Dihedral angle


During tests, we have to redefine the meaning of Dihedral angle, because according to the face direction or type of components, ‘edge angle’ is interpreted differently. Although dihedral angle defined in the class was the inner edge angle of polygon mesh, we followed the edge angle we used in Rhino’s polygon meshing parameter to lessen the confusion.




Maximum spanning tree


Minimum spanning tree

Maximum spanning tree in hemisphere


Minimum spanning tree in hemisphere

Results of development diagram using spanning tree



Design a spiral Hemisphere applying Minimum Spanning Tree vs Maximum Spanning Tree
To make a dramatic comparison between the two developments, we devised a spiral mesh consisting of facet angles in which the edge-angle of each facet is aligned almost unfolded horizontally and almost equally vertically.



Fabrication


In our experiment, both hemispheres constructed using the minimum spanning tree and the maximum spanning tree were crafted from paper. Craft paper possesses sufficient strength to form a self-supporting structure while being easier to fold due to being half-cut, compared to materials like chipboard or acrylic. After unrolling the mesh in Rhino, we utilized Autocad to create a .dxf file for laser cutting.

Overall, we found the hemisphere created from the minimum spanning tree simpler to assemble.

Two main reasons support this observation:

01. The flaps (sections requiring glue) in the hemisphere created from the minimum spanning tree were longer and more continuous. This facilitated the gluing process as it as easier to fold and apply glue along these lines by a single person.

02. Additionally, the laser cuts along the fold lines were not deep enough, resulting in only surface scratches. Consequently, many folds were not sufficiently pronounced, impacting the assembly process.

Conversely, the hemisphere constructed from the maximum spanning tree had numerous neighboring faces with larger dihedral angles.

This necessitated more force to hold the glued parts together, increasing the likelihood of breakage during assembly. We have used the ThinMesh function in the grasshopper to print out the MeshGraph for better visualization.


Reflection


In the method Minimum Spanning Tree, we recognize that facets with smaller (nearly unfolded) angle differences are more likely to fold without using split flaps, as their flap assembly is prone to weaknesses. Facets with greater edge angles can support themselves more effectively, even when assembled with split flaps. 

In our case, we have done some reverse engineering. We had the idea of spiral unfolded shape first, then we tried to design how we should mesh the hemisphere. It will be helpful to test both unfolding techniques on a greater variety of 3D shapes.

On a second read of the Ivy manual, we have also realized that Orange Peel Edge could be a tool to achieve a similar result of the spiral shaped resulted from the maximum spanning tree.