Control of capillary flow through porous media has broad practical implications. However, achieving accurate and reliable control of such processes by tuning the pore size or by modification of interface wettability remains challenging. Here we propose that the liquid flow by capillary penetration can be accurately adjusted by tuning the geometry of porous media. Methodologies: On the basis of Darcy’s law, a general framework is proposed to facilitate the control of capillary flow in porous systems by tailoring the geometric shape of porous structures. A numerical simulation approach based on finite element method is also employed to validate the theoretical prediction. Findings: A basic capillary component with a tunable velocity gradient is designed according to the proposed framework. By using the basic component, two functional capillary elements, namely, (i) flow accelerator and (ii) flow resistor, are demonstrated. Then, multi-functional fluidic devices with controllable capillary flow are realized by assembling the designed capillary elements. All the theoretical designs are validated by numerical simulations. Finally, it is shown that the proposed concept can be extended to three-dimensional design of porous media
By
Amber A’Lee Frost
Jacobin, Januari 2024: Om tonårstidningen Teen Vogue som läses av mer än 8 miljoner: "Även om de exakta siffrorna är omtvistade är en sak helt klar: långt fler vuxna - mestadels millenniegenerationen, även när vi är på väg in i medelåldern - läser tonårstidningen som kallar sig "den unga människans guide till att erövra (och rädda) världen" än tonåringar."
"Most damningly, just 1.7 percent of their May 2018 audience was 17 or younger. Only 2.6 percent were 18 to 24 years old. At the absolute most generous estimate, in Teen Vogue’s digital audience — the only audience they still have after they shelved their print edition with a final copy featuring Hillary Clinton on the cover — 1 in 20 readers is an actual teenager."
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11.2.2020. "Yrityskauppa on merkittävä investointi kotimaisen, riippumattoman journalismin digitaaliseen tulevaisuuteen. Kaupan tavoitteena on vahvistaa ostettavien lehtien ja Sanoman uutismedialiiketoiminnan kehitystä ja varmistaa kaikkia suomalaisia palveleva elinvoimainen, kotimainen, riippumaton uutismedia myös digitaalisessa toimintaympäristössä. Journalistisen riippumattomuuden varmistaminen myös jatkossa on yrityskaupan keskeinen osa: toimitukset ja uutisbrändit jatkavat itsenäisinä omien päätoimittajiensa johdolla."
Olli Tammilehto HS-yleisönoasastossa : DCA-sopimus antaisi mahdollisuuden perustaa Suomeen sellaisia sotilasalueita, joihin vain Yhdysvalloilla olisi pääsy.
Being Catholic Media has placed great emphasis on this divine gift from God for the times we are living in. The Divine Will given to us through The Servant Of God Luisa Piccarreta – bear the approval and the imprimatur of the Catholic Church. Here is the link to Fr. Joseph Iannuzzi – priestly authority and theologian on Luisa Piccarreta and his publications on the Divine Will.
On Monday, June 3, the Ukrainian government banned the World Socialist Web Site across the country, issuing an order commanding all internet service providers to block access to the WSWS indefinitely.
The decision to ban the WSWS is a response to the outpouring of support within Ukraine and internationally for Bogdan Syrotiuk, a 25-year-old socialist internationalist who was arrested by the Zelensky regime on April 25 on trumped up charges of “high treason” for writing articles for the WSWS, which SBU prosecutors (Ukraine’s domestic intelligence agency) deceitfully claim is “Russian propaganda.” Syrotiuk and the organization to which he belongs, the Young Guard of Bolshevik-Leninists (YGBL), are Trotskyists and irreconcilable opponents of the US-NATO war against Russia as well as the capitalist government of Vladimir Putin.