• 0 Posts
  • 43 Comments
Joined 1 year ago
Cake day: June 27th, 2023
  • ziggurat@lemmy.worldto196@lemmy.blahaj.zone•No Gods, No Rulers
    2·
    4 days ago

    Why not? First of I have all the episodes as mkv files, they are high quality but indeed compressed.

    Second, if I will AI upscale the episodes, I want to use uncompressed video files, and then compress them after the upscale. Maybe 720p would be more than enough? Maybe 1080p? I don’t expect 1440p or 4k to improve the viewing experience much over 1080p

    Lastly, in Norway, ripping DVDs for own use is specifically legal. The act of format shifting or making straight up copies at least of music got legal precidence about 20 years ago. I don’t remember exactly, just remember watching the news. Reasoning was, for the sake for format shifting, or making backups to preserve your original. Giving away, lending, or selling your backups was strictly made illegal, except if the original is included when you sell your backup. As well you can’t make a backup and sell the original without destroying the backup or including it with the sale.

    One of the guys credited with breaking the dvd encryption was Norwegian. He didn’t do it alone, and last time I called him the guy who broke thebencruption, someone on reddit yelled at me. He had the code printed on a t-shirt, and used it in every interview on TV. There FBI had an arrest warrant out for him, he even won an award he didn’t attend in the US. The warrant was later recended or something I don’t know, because he did move to the US in the end.

    Final thoughts. I think my ps3 can be used to rip dvd’s using home brew? I might not need to buy a usb drive if I don’t want to.

  • ziggurat@lemmy.worldtoScience Memes@mander.xyz•Little dude ATPEnglish
    26·
    5 days ago

    Adenosine triphosphate (ATP) functions as the primary energy currency of the cell, enabling various biological processes. Here’s an explanation of how ATP works on a molecular level:

    Structure of ATP

    ATP is composed of three main components:

    1. Adenine: A nitrogenous base.

    2. Ribose: A five-carbon sugar molecule, which together with adenine forms adenosine.

    3. Three Phosphate Groups: Linked sequentially through high-energy bonds.

    Energy Storage and Release

    The key to ATP’s function lies in the high-energy bonds between its phosphate groups, particularly the bond between the second (beta) and third (gamma) phosphate groups.

    1. Hydrolysis of ATP:

    When ATP is hydrolyzed (reacts with water), it loses its terminal (gamma) phosphate group, releasing energy.

    The reaction is:

    ATP + H2O > ADP + Pi + Energy

    1. Energy Release:

    The hydrolysis of ATP releases about 30.5 kJ/mol (7.3 kcal/mol) of energy.

    This energy is used to perform cellular work, such as muscle contraction, active transport across cell membranes, and chemical synthesis.

    Mechanism of ATP Utilization

    1. Phosphorylation:

    ATP transfers its phosphate group to another molecule (a process called phosphorylation), making that molecule more reactive.

    This is often facilitated by enzymes known as kinases.

    1. Energy Coupling:

    Cells couple the exergonic reaction of ATP hydrolysis with endergonic reactions (reactions that require energy).

    For example, during muscle contraction, ATP hydrolysis provides the energy for the motor protein myosin to move along actin filaments.

    ATP Synthesis

    ATP is regenerated from ADP through cellular respiration, which consists of three main stages:

    1. Glycolysis: Breakdown of glucose into pyruvate, producing a small amount of ATP.

    2. Citric Acid Cycle (Krebs Cycle): Further breakdown of metabolic products, generating electron carriers (NADH and FADH2).

    3. Oxidative Phosphorylation:

    Electrons from NADH and FADH2 are transferred through the electron transport chain in the inner mitochondrial membrane.

    This creates a proton gradient that drives ATP synthesis via ATP synthase.

    ATP Synthase Function

    ATP synthase is a complex enzyme that synthesizes ATP from ADP and using the energy derived from the proton gradient.

    1. Proton Gradient: Protons flow back into the mitochondrial matrix through ATP synthase.

    2. Rotational Catalysis:

    The flow of protons causes the rotation of a part of ATP synthase.

    This mechanical energy drives the chemical synthesis of ATP from ADP and .

    In summary, ATP serves as a molecular battery, storing energy in its high-energy phosphate bonds and releasing it upon hydrolysis to fuel various cellular activities. Its synthesis and utilization are tightly regulated processes essential for life.

  • ziggurat@lemmy.worldto196@lemmy.blahaj.zone•No Gods, No Rulers
    2·
    5 days ago

    I’m just waiting sometimes searching for an in depth guide, or an easy to use tool, to upscale my sg-1 dvd’s directly from original non compressed quality, to a more palatable resolution before they are compressed and converted to mkv. Tools being FOSS is a soft requirement, it kind of has to run on Linux, or I need to find an older dual core Intel Mac in storage or run windows in a vm.

    I don’t have any computers with a DVD drive any more, but I’m not opposed to buying one