RESURRECT AND RESTORE
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When restoring layouts, i3's built-in ability layout restoring functionality is used. This creates placeholder windows where each one will "swallow" any new window that matches specified criteria window class, instance, title etc. This is necessary for matching by window title because the title must match when the window first appears and programs usually only update the title after the window is created see here for more details.
This project originated as a mixture of hacked together Python and bash scripts that I wrote in order to be able to quickly save and load workspaces on the fly. I hate having to reboot my computer because it disrupts everything I have open which tends to be a lot. To cope with this problem, I try to make it as easy as possible for myself to get everything back to its pre-reboot state. I quickly found out about the i3-save-tree utility and i3's append-layout command, but these weren't much use to me on their own, as you are expected to customise a layout manually after saving it and relaunch all your programs manually when you restore the layout.
My solution was to create a script that would extract just the bits from i3-save-tree that are needed, and use the i3ipc , wmctrl , and psutil Python libraries to obtain the commands necessary to launch the programs in a saved workspace.
Since I decided to release this publicly, I have improved the standard of the code a great deal and gotten rid of the hacky bash parts. The code is all Python now, and i3-save-tree is no longer needed as I have reimplemented it in Python. When matching windows by title, the programs must be restored before the layout, because the title often won't match when the window first appears.
When restoring a layout, i3-resurrect uses xdotool to unmap and remap every window on the workspace which causes i3 to see them as new windows so they will be swallowed by the placeholder windows. A default config file will be created when you first run i3-resurrect. In the case of a window where the process cmdline is not the same as the command you must run to launch that program, you can add an explicit window command mapping in the config file. For example, gnome-terminal's process is gnome-terminal-server, but we need to launch it with the command gnome-terminal.
To get this working, you would put the following in your config file:. In this scenario, you could create one rule that by default maps the application's window class to have no command, and another that sets the command if it also matches a certain title:. For terminal emulator windows, we must get the working directory from the first subprocess usually this will be your shell instead of the window's root process the terminal emulator.
For example, if you use both Alacritty and gnome-terminal and you want their working directories to be restored correctly, you would put the following in your config file:. Some examples are included in the default config.
- Zellias Blade?
- Camelot Tactician;
- Navigation menu.
If you would like me to add more command mappings or terminals to the default config, please open an issue for it. It is also possible to configure swallow criteria on a per window basis, which will override the criteria set by the --swallow command line parameter. We use SemVer for versioning. For the versions available, see the tags on this repository.
See also the list of contributors who participated in this project.
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For those interested, other excellent software I use to get things up and running quickly includes:. Sep 10, Aug 5, Jul 20, Jul 13, Jul 9, Jul 8, Jul 6, Download the file for your platform. A natural process of de-extinction is iterative evolution. An example of a species where this process occurred is the White-throated rail. This flightless bird became extinct approximately , years ago due to an unknown major event that caused sea levels to rise which ultimately resulted in the demise of the species.
The species reappeared about , years ago when sea levels dropped, allowing the bird to evolve once again as a flightless species on the island of Aldabra where it is found to the present day. Opponents of de-extinction have claimed that efforts and resources used to resurrect extinct species could have been better used trying to conserve endangered species that might themselves become extinct. In some cases, the negative impacts on extant species could be highly direct.
For instance, it is proposed that the Asian elephant would act as a surrogate mother for the woolly mammoth embryo. It has also been noted that a resurrected species, while being genetically the same as previously living specimens, will not have the same behaviour as its predecessors.
The first animal to be brought back will be raised by parents of a different species the fetus's host , not the one that died out and thus have differing mothering techniques and other behaviors. Other scholars have published ethical concerns regarding de-extinction. In Conservation Biology , Robert Sandler argues that introducing extinct species to environments may produce harm to modern species, as invasive species.
Issues regarding scientific hubris, human and animal health, and the ecology of sensitive environments have been raised by the scientific community. Further research must be performed regarding de-extinction to investigate advantages and disadvantages to the technology. New technological practices must be examined to prevent environmental hazards. Counter arguments have been made, however, in regards to the benefits of bringing back extinct species. Harvard geneticist, George Church , gives an example of the positive effects of bringing back the extinct woolly mammoth would have on the environment.
He explains that if the newly developed mammoth hybrids were to be placed in areas such as Siberia and Alaska, the outcome may reverse the damage that global warming has caused. If the theories are proven true, global warming could eventually be lessened. Scientific American , in an editorial condemning de-extinction, pointed out that the technologies involved could have secondary applications, specifically to help species on the verge of extinction regain their genetic diversity , for example the black-footed ferret or the northern white rhinoceros.
It noted, however, that such research "should be conducted under the mantle of preserving modern biodiversity rather than conjuring extinct species from the grave. It's been argued that revived species can be utilised as a tool to support other conservation initiatives by acting as a " flagship species " - a charismatic organism that generates popular support and funds for conserving entire ecosystems.
Similarly, the conservationist Josh Donlan claims that if the passenger pigeon were resurrected, there would inevitably be a legal impetus for the protection of its habitat under the Endangered Species Act. The existence of preserved soft tissue remains and DNA of woolly mammoths has led to the idea that the species could be recreated by scientific means. Two methods have been proposed to achieve this.
The first is cloning , which would involve removal of the DNA-containing nucleus of the egg cell of a female elephant, and replacement with a nucleus from woolly mammoth tissue.
The cell would then be stimulated into dividing, and inserted back into a female elephant. The resulting calf would have the genes of the woolly mammoth, although its fetal environment would be different. To date, even the most intact mammoths have had little usable DNA because of their conditions of preservation. There is not enough to guide the production of an embryo. The resulting offspring would be an elephant—mammoth hybrid, and the process would have to be repeated so more hybrids could be used in breeding.
After several generations of cross-breeding these hybrids, an almost pure woolly mammoth would be produced. The fact that sperm cells of modern mammals are potent for 15 years at most after deep-freezing is a hindrance to this method. They hope to use similar methods to find usable mammoth DNA. Mammoth expert Adrian Lister questions the ethics of such recreation attempts. In addition to the technical problems, he notes that there is not much habitat left that would be suitable for woolly mammoths. Because the species was gregarious , creating a few specimens would not be ideal.
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He also notes that the time and resources required would be enormous, and that the scientific benefits would be unclear; these resources should instead be used to preserve extant elephant species which are endangered. This is currently being done by Harvard geneticist George Church , and they have already successfully made changes in the elephant genome with the genes that gave the woolly mammoth its cold-resistant blood, longer hair, and extra layer of fat.
The Pyrenean ibex was one of four original subspecies of Spanish ibex that roamed on the Iberian peninsula. However, while it was abundant during Medieval times , over-hunting in the 19th and 20th centuries led to its demise. In , only a single female named Celia was left alive in Ordesa National Park. Scientists captured her, took a tissue sample from her ear, collared her, then released her back into the wild, where she lived until she was found dead in , having been crushed by a fallen tree.
In , scientists used the tissue sample to attempt to clone Celia and resurrect the extinct subspecies.