World Vol.157 (U.S., etc.)


https://twitter.com/IAJournal_CH/status/1412776945650221056


Science and Technology Vol.71 / World Vol.154 (The Role of Critical Minerals in Clean Energy Transitions @IEA)

This is a very useful open-access report. I appreciate @IEA’s contribution to all the human beings.
(It is the first time to paste as many as 20 screenshots on this website. Hope this is helpful.)





















Austria Vol.7 (cities)



https://twitter.com/alpenadriauni/status/1410508488439177219


https://twitter.com/alpenadriauni/status/1408320753636945920


https://twitter.com/cfaed_TUD/status/1298392570645680128
https://twitter.com/lakesidescitec/status/1407638930598633473


https://www.youtube.com/watch?v=9DQ40SVfUwY
https://twitter.com/StadtVillach/status/1354794170943229963
https://twitter.com/JosepEudald/status/1411809097725403140


https://twitter.com/chris4024/status/1411033963074883587


https://twitter.com/phoenixbookcafe/status/1410615644169461769
https://twitter.com/WagnerGerfried/status/1411053281900642306




https://twitter.com/StadtDornbirn/status/1400716490605748224


https://twitter.com/transitdiagrams/status/1369344732376272898



https://twitter.com/EUHomeAffairs/status/1410180885702393858

https://www.youtube.com/watch?v=UPaQga3Y08g


https://twitter.com/breakonthru234/status/1399470153528594432





https://twitter.com/PhilWe1/status/1409092411842863107




https://twitter.com/CarfreeNetwork/status/1411253894831874049


https://twitter.com/LadySileL/status/1409832616572985344


https://twitter.com/viennasymphony/status/1410519824556507137
https://twitter.com/der_heubi/status/1408785219373703171


World Vol.152 (U.S.)

https://twitter.com/Brooke_Medina_/status/1397231057053917190


https://twitter.com/FinancialXpress/status/140828354770661376
https://twitter.com/SilverElMining/status/14083190822443622411


https://twitter.com/KuyaSilver/status/1407326908317057025


Science and Technology Vol.70 (coronavirus drugs)


https://twitter.com/ukinuae/status/1405554130471555072


https://twitter.com/SIDPharm/status/1403404688196784136
https://twitter.com/trtworld/status/1405351995473465349

https://twitter.com/AlphaTrader00/status/1370392844762972165


https://twitter.com/ScienceinBoston/status/1310959781780353024


https://twitter.com/CraigKellyMP/status/1409885443223658498
https://twitter.com/CraigKellyMP/status/1409817947694985220


https://twitter.com/ieDelhi/status/1402871650392035330
https://twitter.com/ibtimes_india/status/1401452191978868736


https://twitter.com/NewIndianXpress/status/1398194698565554179


World Vol.151 (U.S., U.K., etc.)


https://twitter.com/ABsteward/status/1405948924133888000


https://twitter.com/EvilDoctorK/status/1406949675043860483


https://twitter.com/wef/status/1407398092605997057
https://twitter.com/wef/status/1407428247596548104
https://twitter.com/wef/status/1406643001842049031
https://twitter.com/wef/status/1406537309814550528
https://twitter.com/wef/status/1406250418322083843


https://twitter.com/wef/status/1406612802664484875


https://twitter.com/tableaupublic/status/1405586268982059022


World Vol.148 / Science and Technology Vol.67 (semiconductor)

Top USA and International Semiconductor Manufacturers | @Thomasnet

2020 STATE OF THE U.S. SEMICONDUCTOR INDUSTRY (PDF; 06/2020) | @SIAAmerica

The Semiconductor Supply Chain: Assessing National Competitiveness (PDF; 01/2021) | Center for Security and Emerging Technology (CSET)

Overview Of The Semiconductor Capital Equipment Industry (01/15/2019) | @SeekingAlpha
Memory chips are used to store data electronically in the form of bits (8bits = 1 byte). The most common types of memory chips made by the industry today are Dynamic Random Access Memory (“DRAM”) and NAND flash. DRAM is volatile memory, which means it temporarily stores each bit of data in a separate capacitor while the associated device is powered on. DRAM is commonly used by data servers and mobile devices. NAND (short for NAND flash) is non-volatile memory (“NVM”), which means it stores data even if the power is switched off. It’s called NAND because it’s a type of memory that resembles the NAND (not-and) logic. NAND is commonly used in memory cards and solid state drives (“SSD”). The major trend in memory today is the switch to three-dimensional (3D) memory where memory cells are built vertically, instead of horizontally (planar), which increases memory bit density.
Logic chips are the fundamental building blocks for digital electronics. Logic chips are constructed from connecting individual digital logic gates that perform logical operations of AND, OR and NOT on binary numbers. (This is where the NAND or not-and comes from). Logic chips perform calculations that drive computer processing.
Semiconductor manufacturers are generally focused on designing chips for various device applications. The semiconductor capital equipment industry (“semi-cap” for short) provides the equipment for these manufacturers.
The semiconductor industry is to electronics what the mining industry is to finished metal products. Taking this one step further, the semi-cap industry supplies the “picks and shovels” for the broader semiconductor industry.

The Main Types of Chips Produced by Semiconductor Companies (05/19/2020) | @investopia
Memory Chips; Microprocessors; Graphic Processing Units (GPUs); Standard Chips (Commodity ICs); Analog Chips; Mixed Circuit Semiconductors

Understanding Memory – An inside look at different memory types and how they work. (02/15/2018) | @semiEngineering
While logic chips work as the “brains” of an electronic device, performing functions using mathematical operations, memory chips store data. The basic building block of a memory chip is a cell, a tiny circuit with a capacitor (which stores data as a charge) and one or more transistors (which activate data). The capacitor is either charged or discharged, corresponding to the two possible data values (“1” or “0”), where this smallest unit of data is known as a “bit”.
The cells are arranged in a row and have a bit line structure that connects into a memory “address” called a word line. The address provides a means of identifying a location for data storage, and the word line forms an electrical path allowing all the memory cells on that row to be activated at the same time for storage (“write”) or retrieval (“read”). Data access is initiated with electrical signals – a row address strobe (RAS) and a column address strobe (CAS) – that together pinpoint a cell’s location within an array. If a charge is stored in the selected cell’s capacitor, these signals cause the transistor to conduct, transferring the charge to the connected bit line, causing a slight voltage increase that reads as a “1”.

The basics of microchips | ASML

MARKETS & PRODUCTS | ASM

Types of Semiconductor Devices | TOSHIBA

Guide to the major types of computer chips (03/26/2019) | @theburninhub

The global semiconductor silicon wafer market is expected to reach an estimated $17.4 billion by 2026 with a CAGR of 6.4% from 2020 to 2026 (06/14/2021) | @GlobeNewswire

Global Logic Semiconductor Market to Surpass $129 Billion by 2024 – Featuring Intel, Samsung Electronics, Xilinx, and NXP Semiconductors – ResearchAndMarkets.com (05/17/2019) | @BusinessWire

Global Logic Semiconductor Market – Industry Trends and Forecast to 2028 (05/2021) | DATA BRIDGE

What is Semiconductor Memory? | @ROHMsemi


World Vol.143 (U.S., etc.)


World Vol.141 (U.S., etc.)


https://twitter.com/CAgovernor/status/1401966933403050007


https://twitter.com/Ekateri03519672/status/1399606903274151936


Science and Technology Vol.66 (copper, silicon…/gallium…, etc.)

https://twitter.com/BoschPress/status/1399670818246856706


https://twitter.com/CoolMagSL/status/1312346765006434309

https://twitter.com/NadWGab/status/1038741609138061314


https://twitter.com/BLMAlaska/status/1396904156422676489


https://twitter.com/CastilloCopper/status/1397530576161280006


https://twitter.com/anasalhajji/status/1396674714643357696


https://twitter.com/Long2The/status/1397949672006815746


https://twitter.com/electronicspec/status/1386270037317664775

Tech Spotlight Casebook 2021 (w PDF; 05/2021) | @BelferCenter


https://twitter.com/TheSun/status/1397424760112488449


World Vol.140 (U.S., etc.)

https://twitter.com/RevereCopper/status/1288489799188393984


https://twitter.com/joncoopertweets/status/1396306525669445635


https://twitter.com/Ohmszy/status/1400964664469594116


https://twitter.com/MassEMA/status/1399763336003215362


https://twitter.com/andyvalencianoy/status/1400618215915544577


https://twitter.com/rogue_trippers/status/1400435589611204609

Belfer Center Annual Report 2020 (w PDF; 01/2021) | @BelferCenter


Germany Vol.28

https://twitter.com/GPPi/status/1385491716623540225
https://twitter.com/GPPi/status/1384770167645814784
https://twitter.com/GPPi/status/1384071842235752449


https://twitter.com/dgapev/status/1386343245215584258


https://twitter.com/MakeitinGermany/status/1375008764068302860
https://twitter.com/boell_us/status/1369324600979521538


https://twitter.com/TheInsiderPaper/status/1366645283686350849
https://twitter.com/dgapev/status/1366681227860787201


https://twitter.com/dwnews/status/1387357291444322306


https://twitter.com/dwnews/status/1387278151231754240
https://twitter.com/dwnews/status/1387253236868935681


https://twitter.com/dwnews/status/1379626985429819392


Southern Europe Vol.5 (Italy Vol.10 / Greece Vol.5 / Spain Vol.10 / Portugal Vol.5)


https://twitter.com/ESS_Survey/status/1366662074127024128
https://twitter.com/CER_EU/status/1366330752821035009


https://twitter.com/CIVICA_EU/status/1376864508874997763
https://twitter.com/g20org/status/1383060968201199618
https://twitter.com/bancaditalia/status/1380535258492383238


https://twitter.com/GreeceInLux/status/1367135493822021632


https://twitter.com/Electograph/status/1385339000802643971
https://twitter.com/Electograph/status/1378975877640359936
https://twitter.com/Electograph/status/1366343709558734849
https://twitter.com/Electograph/status/1347276786216935431
https://twitter.com/GreenEUJournal/status/1384458763743252480


 https://twitter.com/CanadianWater/status/1385700246081130496
 https://twitter.com/tv6newslive/status/1384165486972137486
 https://twitter.com/wallacemick/status/1370000161938755584


World Vol.119


https://twitter.com/mattskala/status/1382170536332124162
https://twitter.com/TheStreet/status/1380524654532628485


https://twitter.com/SkyNews/status/1383469052144721925


https://twitter.com/RUSI_org/status/1382638890704637953


World Vol.117 (U.S., etc.)


https://twitter.com/NationalZoo/status/1382739590658863108


https://twitter.com/KING5Seattle/status/1382953153600045057


World Vol.116 (U.S., etc.)

https://twitter.com/OECDeconomy/status/1380475468021968900


https://twitter.com/ThomasMillerCo/status/1369626728927215618


U.S. universities and colleges Vol.63 (UArk – economy, politics, etc.) / Arkansas Vol.10


https://twitter.com/UALREconomics/status/1369414354593054733


https://twitter.com/PryorCenter/status/1369715933971939333


https://twitter.com/PryorCenter/status/1361408706399907842


World Vol.102 (U.S., etc.)


https://twitter.com/NASA/status/1365361136212836355


https://twitter.com/epc_eu/status/1365572378726694916
https://twitter.com/CEPS_thinktank/status/1364963166413877250


https://twitter.com/IFRI_/status/1359116403207462912


https://twitter.com/patriottakes/status/1367363910123331589


https://twitter.com/NPR/status/1365230186023837702


U.S. universities and colleges Vol.27 (UTK, Belmont, Lipscomb, Union, UofMemphis, Tennessee Technological, UTC) / Tennessee Vol.10


https://twitter.com/cee_utk/status/1349718365514903557


https://twitter.com/UTKnoxville/status/1349387361197715461


https://twitter.com/UTKnoxville/status/1350506855597027328


https://twitter.com/LadyVol_Hoops/status/1353446251312758784

https://twitter.com/BelmontUniv/status/1357806964273725441


https://twitter.com/BelmontUniv/status/1351578938351493121
https://twitter.com/BelmontUniv/status/1351555777341902853
https://twitter.com/BelmontUniv/status/1350119865361817604
https://twitter.com/BelmontUniv/status/1347291928338034690
https://twitter.com/BelmontUniv/status/1346501974422925313
https://twitter.com/BelmontUniv/status/1344307012008603650
https://twitter.com/BelmontUniv/status/1341792192713662465

https://twitter.com/uofmemphis/status/1357473173999091714

https://twitter.com/UTChattanooga/status/1357819357557055489
https://twitter.com/UTChattanooga/status/1357411563976724481


https://twitter.com/UTCRollinsCOB/status/1347597295609634828
https://twitter.com/UTCRollinsCOB/status/1319735953230073859
https://twitter.com/Our_Tennessee/status/1356671387100979202


U.S. universities and colleges Vol.26 (Vanderbilt) / Tennessee Vol.9


https://twitter.com/VanderbiltU/status/1354515961404125192


https://twitter.com/VanderbiltU/status/1339933606278553605


World Vol.94 (World Economic Forum – videos)