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@ErikJonker@mastodon.social
2025-07-20 08:10:36

"Stukje bij beetje verdwijnen de vangrails die Trump in het gareel moeten houden" , opvallend vind ik dat veel Amerikaanse commentatoren net doen alsof de constitutionele crisis er nog niet is, maar nog moet komen. Dat is een te juridische blik op het afglijden naar een fascistische staat dat in volle gang is.

Stukje bij beetje verdwijnen de vangrails die Trump in het gareel moeten houden
De macht van Trump: De balans tussen de drie machten slaat in een VS onder Donald Trump door naar de uitvoerende macht. De nu een half jaar regerende president breidt zijn gezag uit, maar doet dat niet alleen: Congres en Hooggerechtshof geven hem veel ruimte.

@arXiv_condmatmtrlsci_bot@mastoxiv.page
2025-08-19 08:52:50

Electro-thermal Co-design of High-power Vertical \b{eta}-Ga2O3 Schottky Diodes with High-permittivity Dielectric Field-plate
Ahsanul Mohaimeen Audri, Chung-Ping Ho, Jingjing Shi, Esmat Farzana
arxiv.org/abs/2508.11775

Electro-thermal Co-design of High-power Vertical \b{eta}-Ga2O3 Schottky Diodes with High-permittivity Dielectric Field-plate
This work presents electrothermal co-design of vertical \b{eta}-Ga2O3 Schottky barrier diodes (SBDs) to enhance both heat dissipation and high field management in high-power applications. Here, we demonstrate device-level thermal management tailored for two vertical \b{eta}-Ga2O3 SBD structures that employed different edge termination techniques, such as field-plate and deep etch with sidewall field-plate, where the field-plate was formed with high-permittivity dielectric (BaTiO3). The localize…

@cdarwin@c.im
2025-09-19 22:31:56

This week, the France-based ArianeGroup aerospace company announced that it had completed the integration of the
Themis vehicle,
a prototype rocket that will test various landing technologies, on a launch pad in Sweden.
Low-altitude hop tests,
a precursor for developing a rocket's first stage that can vertically land after an orbital launch,
could start late this year or early next.

After a very slow start, Europe’s reusable rocket program shows signs of life
Although Themis is making progress, the program is several years behind schedule.

@leftsidestory@mstdn.social
2025-09-19 00:30:01

On The Road - To Xi’An/ Geometry 📐
在路上 - 去西安/ 几何 📐
📷 Pentax MX
🎞️Fujifilm Neopan F, expired 1993
#filmphotography #Photography #blackandwhite

FUJIFILM NEOPAN F (FF) English Alt Text: A black-and-white photograph taken from beneath a long bridge. The bridge stretches into the distance, supported by evenly spaced vertical columns that descend into a calm body of water. The water is so still that it mirrors the columns and underside of the bridge perfectly, creating a symmetrical visual effect. Along the top edge of the bridge are traditional lantern-style lamp posts, possibly East Asian in design, adding a cultural touch to the otherw…
FUJIFILM NEOPAN F (FF) English Alt Text: A black-and-white image of a modern architectural structure beside a large reflective pool. The building features angular overhangs and vertical columns, casting dramatic shadows. The water below reflects the entire structure, doubling its visual impact. In the background, trees and another uniquely designed building—possibly a museum or cultural center—add context. A lone person walks near the water’s edge, providing scale and a human element. The comp…
FUJIFILM NEOPAN F (FF) English Alt Text: A black-and-white photo showing a modern bridge with stylized support columns extending into the distance. The bridge spans a body of water that reflects the structure and sky, creating a symmetrical scene. In the background stands a large, tiered tower resembling traditional East Asian pagodas, adding cultural depth. The image uses strong perspective lines and mirrored reflections to emphasize geometry and balance. The contrast between the sleek bridge…
@arXiv_csDS_bot@mastoxiv.page
2025-08-18 08:02:30

Face-hitting dominating sets in planar graphs: Alternative proof and linear-time algorithm
Therese Biedl
arxiv.org/abs/2508.11444 arxiv.org…

Face-hitting dominating sets in planar graphs: Alternative proof and linear-time algorithm
In a recent paper, Francis, Illickan, Jose and Rajendraprasad showed that every $n$-vertex plane graph $G$ has (under some natural restrictions) a vertex-partition into two sets $V_1$ and $V_2$ such that each $V_i$ is \emph{dominating} (every vertex of $G$ contains a vertex of $V_i$ in its closed neighbourhood) and \emph{face-hitting} (every face of $G$ is incident to a vertex of $V_i$). Their proof works by considering a supergraph $G'$ of $G$ that has certain properties, and among all such gr…

@netzschleuder@social.skewed.de
2025-08-18 13:00:05

us_roads: United States roads (2000)
The road networks of the 50 US States and the District of Columbia based on UA Census 2000 TIGER/Line Files. Edges are stretches of road and vertices are intersections of roads. The data sets were assembled by Dominik Schultes. The 'merged' network contains all the states merged together.
This network has 64892 nodes and 76809 edges.
Tags: Transportation, Roads, Unweighted

us_roads: United States roads (2000). 64892 nodes, 76809 edges. https://networks.skewed.de/net/us_roads#HI

us_roads — United States roads (2000)
The road networks of the 50 US States and the District of Columbia based on UA Census 2000 TIGER/Line Files. Edges are stretches of road and vertices are intersections of roads. The data sets were assembled by Dominik Schultes. The 'merged' network contains all the states merged together.

@arXiv_mathCO_bot@mastoxiv.page
2025-08-20 09:01:10

Maya-Tupi graphs: a generalization of split graphs
J\'ulio Ara\'ujo, C\'esar Hern\'andez-Cruz, Cl\'audia Linhares
arxiv.org/abs/2508.13424

Maya-Tupi graphs: a generalization of split graphs
We define the family of Maya-Tupi graphs as those graphs that admit a partition $(A,B)$ of their vertex sets such that $A$ induces a complete multipartite graph where each part has size at most two, and $B$ induces a graph where every connected component is $K_1$ or $K_2$. The family of Maya-Tupi graphs is self complementary, generalizes split graphs, falls into the sparse-dense partitioning schema and is characterized by finitely many forbidden induced subgraphs. Unfortunately, our computation…

@leftsidestory@mstdn.social
2025-09-20 00:30:01

On The Road - To Xi’An/ Quiescence ➰
在路上 - 去西安/ 静止 ➰
📷 Pentax MX
🎞️Kodak Double-X 5222
#filmphotography #Photography #blackandwhite

Kodak Double-X 5222 (FF) English Alt Text: A black-and-white photo of a serene scene featuring a traditional East Asian bridge and building. The bridge has ornate railings and decorative lamp posts. The building behind it has a tiered roof with upturned eaves, typical of classical Chinese or Japanese architecture. Below, a body of water reflects the structures above. Rocks and a paved area are visible in the foreground. The composition evokes a sense of peace and timelessness, possibly part of…
Kodak Double-X 5222 (FF) English Alt Text: A black-and-white image showing a modern elevated train station in the background, with a curved roof and surrounding electrical infrastructure. The station sits atop a concrete retaining wall. In the foreground, a road curves to the left, where two white SUVs are parked near a tall streetlight. Trees and fencing line the area near the station. The composition contrasts urban architecture with everyday vehicles, creating a layered cityscape that feels…
Kodak Double-X 5222 (FF) English Alt Text: A monochrome image of an outdoor pedestrian walkway, flanked by metal railings and fencing. A gate-like structure with vertical bars and mesh fencing stands in the center, possibly marking an entrance or exit. Behind the gate, trees and greenery suggest proximity to a park. Two small figures sit or crouch near the railing in the background. Overhead, a large structure—likely a bridge or overpass—casts shadows across the walkway. The concrete ground is…
Kodak Double-X 5222 (FF) English Alt Text: A black-and-white photo of a sleek, modern train station platform. The architecture features a curved roof supported by exposed beams and large windows that allow natural light to flood the space. Glass barriers line the edge of the platform, separating passengers from the train tracks. Directional signs and floor markings indicate boarding zones and safety areas. A few people walk in the distance, adding a sense of quiet movement. The overall mood is…
@Speckdaene@nrw.social
2025-10-19 15:21:51

#Vogelgrippe #SachsenAnhalt | #Thüringen Hundert tote #Kraniche am Stausee

Tote Kraniche am Stausee Kelbra: Erster Test auf Vogelgrippe positiv
Am Stausee Kelbra sind dutzende tote Kraniche entdeckt worden. Ein erster Labortest bei einem der Kadaver hat nun positiv auf Vogelgrippe angeschlagen.

@leftsidestory@mstdn.social
2025-10-20 00:30:00

Moody Urbanity - Manmade Confinements ⛑️
情绪化城市 - 人造禁锢 ⛑️
📷 Pentax MX
🎞️ Kentmere Pan 400
#filmphotography #Photography #blackandwhite

Kentmere Kentmere PAN 400 (FF) English Alt Text: A black and white photo of a tall residential building with modern architecture, featuring rows of windows and balconies. In the foreground, tangled barbed wire dominates the lower part of the image, out of focus but visually striking. The contrast between the harsh, chaotic wire and the orderly structure of the building creates tension. Tree branches and leaves frame the top of the image, and the sky is clear. The juxtaposition suggests themes …
Kentmere Kentmere PAN 400 (FF) English Alt Text: A black and white photo showing two contrasting buildings. On the left is a light brick structure with three narrow vertical windows and a small vent. On the right is a darker brick building with a metal railing. Behind the railing, a large reptilian sculpture—possibly a dinosaur or lizard—is partially visible. Its textured surface adds an unexpected element to the otherwise minimalist urban scene. The contrast between architectural styles and t…
Kentmere Kentmere PAN 400 (FF) English Alt Text: A black and white photograph of a modern staircase with a minimalist design. The steps are made of smooth concrete, and transparent glass panels serve as railings. A sleek metal handrail cuts diagonally across the image, intersecting with the geometric lines of the stairs and glass. The lighting casts soft shadows that emphasize the texture of the concrete and the clarity of the glass. The composition is clean and architectural, with a small lab…
Kentmere Kentmere PAN 400 (FF) English Alt Text: A black and white image of a stairwell with metal railings and tiled steps. Between the stair flights, a large air conditioning unit with two circular fans is wedged into a narrow space beside a worn concrete wall. The wall shows discoloration and age. The placement of the unit in such a confined area highlights the constraints of urban architecture and the creative use of space. The scene feels industrial and utilitarian, with a focus on functi…