The split between "Today" and "Tomorrow" is at midnight, not when one sleeps/wakes up.
This comes up often after midnight when my girlfriend asks me about "tomorrow". Why discuss breakfast for tomorrow when we still haven't had breakfast today??
Hi! I am sorry, I know it is not entirely obvious from the community's description (the community itself has been abandoned it seems), but the community is hosted in a non-political science/nature instance.
I think it is better if I remove the community altogether because it is not moderated and it will inevitably invite this kind of politicized questions.
I will do so in a bit. Perhaps this other community is better for this: https://lemmy.world/c/nostupidquestions
Sometimes it is also just good or bad luck. This time I got lucky. Last month this instance had about a month of problems because the image hosting provider's services came down unexpectedly and they took over 3 weeks to fix the issue. I think it is a good idea to have accounts on different instances - and even better - one can create a single-person instance and use that to interact.
Thanks a lot! I appreciate the gesture of donating but it is not necessary, it is not expensive and I have not gone through the process of setting up a donation system. My recommendation in general is to donate to the development directly if you would like to support the lemmy ecosystem: https://join-lemmy.org/donate
It is done now :) Sorry for the delay!
Thanks a lot for sharing! It has been nice thinking about this topic again.
When I wrote my response I was hyper-focused on the concept of "antenna-like" resonances due to the wavelength of the radiation, so it was interesting to read about the 500 Hz resonances that I assume are due to natural frequencies of tiny hairs or other oscillators in bees. I did not even consider these.
I have in the past heard about some micro-wave and also IR-assisted chemistry. It does make some intuitive sense that the excitation of particular modes that displace molecules or groups of molecules along a reaction coordinate might help speed up a specific reaction pathway, but I remember a few years ago that the data was not there to support that. I believe a professor at my university was doing some experiments in which the reactants are placed within a cavity that is resonant with such a mode in an attempt to increase reaction rates via some cavity enhancement. From what I can see they have not published on this topic yet, but it seems to be related to this concept: https://pubs.aip.org/aip/jcp/article/154/19/191103/565904
I am very curious about your LoRa bee sensors. What kind of sensors are you using?
I will upgrade in a few minutes. From what I have read it might take several minutes.
Instance has been upgraded to version 0.19.11
Sorry for the delay! The instance is now up-to-date running version 0.19.11
Important note: Moderators now have the ability to see what users upvote and downvote posts and comments within the communities that they moderate.
You can read the rest of the release notes here: https://mander.xyz/post/27810123
It looks like that account was deleted by someone with access to the account. Most likely by the account owner. When a user deletes their account there is no form to fill in a reason, the data is just wiped.
Great, added. Thank you!
Awesome, thank you! I have added you as a moderator.
Amazing!!
AAAHHHH 😭 Such a relief. This was stressful.
The websites makes use of Contabo's object storage service for storing and serving images. Earlier during the month, I got an e-mail saying that there would be a 12-hour downtime window due to a migration. Alright, no problem.
A bit before this users reported problems with uploads. I figured this was related to the migration.
After the "migration", images still caused problems due to some "administrative rule" preventing uploads. I sent messages daily to Contabo. At first they were responding that "their engineers were looking into it, that this was related to the migration, and that they had no time estimate". OK, I can be patient....
After a few days I lost some of my patience and pressed them more often, until they started sending me generic messages and eventually saying that "the problems were already fixed" and suggesting it may be some configuration error on my side.
This is where it got stressful, because my knowledge of the implementation of the images back-end is superficial. So... That meant I would need to study the details and either fix it myself or show proof that it was their fault.
These past few days I have tried to do some reading and tested configuration changes, but I am the kind of person that puts too much on their plate and I have been quite busy, so this has been an additional stress point.
Today, images suddenly started working (until it came down again due to some logs piling up). This tells me that it was not a configuration issue and it was with high probability something on Contabo's side that they fixed today. Uploads are working as well now. Contabo support never shared any information about the specifics of what went wrong, so I don't know.
This doesn't mean that I don't need to study the details, but at least now the pressure is lower. My plan now is to do some studying on how images are stored and served and once I have a good understanding I can migrate the instance to a dedicated server. I will also look into techniques for making a server more resilient when things do go wrong.
Yes, it is pretty frustrating.
I keep sending them messages every day. Today's reply:
This is connected to the migration and there is no ETA currently.
Not very happy with them. I am looking into how to move the images somewhere else.
Thanks! <3 Cost is not the issue. The reason why I selected this option was because it seemed a good choice at the time. Moving the image database around is a bit of a hassle so I chose to just keep it as it was even after learning of other options. Last time it took several days of downtime to move the images over because the transfer speed into/out of the object storage is very low.
If I would have known that this would happen now, I might have taken this opportunity to move all the images over. But I was not expecting this amount of downtime. Now I worry that trying to move images from one place to another when the object storage is acting up is risky, and also I am busy.
I sent another message to support this morning and received:
We are sorry for the inconvenience caused. Please note that our technicians are working diligently on this matter, there is no ETA.
Sorry 😓
They are cheap. But I think that at the current total cost I would be able to improve performance while keeping cost about the same by migrating the instance to a dedicated server instead of a VPS + object storage.
Only that I am frustrated at the object storage provider (Contabo), and now I see why their reputation is not great. Their reply was that they sent a warning about the "12 hour downtime during March 10th".... but obviously these effects have extended both to before and after this "12 hour downtime". At least I got confirmation that this problem is due to their migration.
I contacted support this morning as the issue persists. They confirmed that it is related to their migration, but they have not been able to give me a specific time for when it will be resolved.
A travelling-wave strategy for plant–fungal trade
Abstract
For nearly 450 million years, mycorrhizal fungi have constructed networks to collect and trade nutrient resources with plant roots1,2. Owing to their dependence on host-derived carbon, these fungi face conflicting trade-offs in building networks that balance construction costs against geographical coverage and long-distance resource transport to and from roots3. How they navigate these design challenges is unclear4. Here, to monitor the construction of living trade networks, we built a custom-designed robot for high-throughput time-lapse imaging that could track over 500,000 fungal nodes simultaneously. We then measured around 100,000 cytoplasmic flow trajectories inside the networks. We found that mycorrhizal fungi build networks as self-regulating travelling waves—pulses of growing tips pull an expanding wave of nutrient-absorbing mycelium, the density of which is self-regulated by fusion. This design offers a solution to conflicting trade demands because relatively
High Fidelity Waveguides Through Vitreous Media Recomposition for Next Generation Photonic Devices
Abstract
A newly designed optical aluminosilicate glass that supports femotsecond laser written ultra-low loss optical waveguides is presented in this paper. Propagation losses as low as −0.020 ± 0.003 and −0.037 ± 0.003 dB cm−1 at 1310 and 1550 nm, respectively, are enabled by engineering the glass composition. Raman, Brillouin and electron microscopies are used to understand the origins of femtosecond laser-induced refractive index changes.
Molecules-mediated bidirectional interactions between microbes and human cells
Abstract
Complex molecules-mediated interactions, which are based on the bidirectional information exchange between microbes and human cells, enable the defense against diseases and health maintenance. Recently, diverse single-direction interactions based on active metabolites, immunity factors, and quorum sensing signals have largely been summarized separately. In this review, according to a simplified timeline, we proposed the framework of Molecules-mediated Bidirectional Interactions (MBI) between microbe and humans to decipher and understand their intricate interactions systematically. About the microbe-derived interactions, we summarized various molecules, such as short-chain fatty acids, bile acids, tryptophan catabolites, and quorum sensing molecules, and their corresponding human receptors. Concerning the human-derived interactions, we reviewed the effect of human molecules, including hormones, cytokines, and other circulatory metabolites on microbial characteristics an
Lost in the Amazon: Rediscovery of the Rio Santa Rosa Mushroomtongue Salamander (Caudata: Plethondontidae) from Ayacucho, Peru | Zootaxa
Abstract
Bolitoglossa digitigrada Wake, Brame and Thomas, 1982 was described from a few kilometers upstream from the Rio Santa Rosa, Ayacucho Region, Peru, at 1000 m a.s.l. in the Eastern Amazonian Montane Forest. Besides the type specimens, no additional collections or sightings of B. digitigrada had been reported for 43 years, and there is no information about its phylogenetic position inside its group. During a field expedition conducted in October 2022, we found four individuals of B. digitigrada in a corn and banana field near the community of San Jose, approximately 2.7 km from the type locality. Here, we provide information about living specimens, update description of coloration in life, elevation, and evaluate the phylogenetic relationships of B. digitigrada with a molecular phylogeny based on a 16S rRNA sequence.
Issue with images expected during a 12 hour period today
The server's images are stored and served using object storage.
The object storage provider has sent a message stating that they will perform a 12-hour migration tomorrow, March 10th, from 8:00 AM – 8:00 PM CET, so downtime of the object storage service is expected. Site images will likely not be displayed during this time.
In these past days users have reported issues with image uploads. I suspect that the issue is related to this same migration. If so, images should be back and the upload issue resolved by tomorrow night. If uploads are still causing problems I will investigate further.
I think it is the object storage provider... I see that there is a scheduled migration for 12 hours March 10th, but I suspect that they may have already started moving things around.
Thanks. I have not changed anything recently. I am also blocked from uploading. Not sure yet what the problem is, I am looking into it.
Learning produces an orthogonalized state machine in the hippocampus
Abstract
Cognitive maps confer animals with flexible intelligence by representing spatial, temporal and abstract relationships that can be used to shape thought, planning and behaviour. Cognitive maps have been observed in the hippocampus1, but their algorithmic form and learning mechanisms remain obscure. Here we used large-scale, longitudinal two-photon calcium imaging to record activity from thousands of neurons in the CA1 region of the hippocampus while mice learned to efficiently collect rewards from two subtly different linear tracks in virtual reality. Throughout learning, both animal behaviour and hippocampal neural activity progressed through multiple stages, gradually revealing improved task representation that mirrored improved behavioural efficiency. The learning process involved progressive decorrelations in initially similar hippocampal neural activity within and across tracks, ultimately resulting in orthogonalized representations resembling a state machine captu
Prairie dogs (Tan Eggs) kiss | Spy in the Wild - BBC
A spy tan egg pretends to be on the same emotional wavelength as other tan eggs
Human Brain Organoids and the Mereological Fallacy
Sietske A.L. van Till and Eline M. Bunnik (2024) have recently expressed a concern about science miscommunication regarding human brain organoids. They worry that the mereological fallacy is often being committed when the possibility of brain organoid psychological capacities such as consciousness and intelligence are considered, especially by bioethicists discussing the moral status of human brain organoids. Focusing specifically on one psychological capacity, namely consciousness, this article begins with a brief introduction to van Till and Bunnik’s concern about the mereological fallacy as it relates to brain organoids. It is then shown that whether the mereological fallacy is being committed depends on commitments in philosophy of mind about how consciousness relates to the brain and its neural mechanisms. This is demonstrated by appealing to two different example views about the ontology of consciousness embraced by J.J.C. Smart’s type identity theory and a version of hylomorphi
Individual and additive effects of vitamin D, omega-3 and exercise on DNA methylation clocks of biological aging in older adults from the DO-HEALTH trial | Nature Aging
Abstract
While observational studies and small pilot trials suggest that vitamin D, omega-3 and exercise may slow biological aging, larger clinical trials testing these treatments individually or in combination are lacking. Here, we report the results of a post hoc analysis among 777 participants of the DO-HEALTH trial on the effect of vitamin D (2,000 IU per day) and/or omega-3 (1 g per day) and/or a home exercise program on four next-generation DNA methylation (DNAm) measures of biological aging (PhenoAge, GrimAge, GrimAge2 and DunedinPACE) over 3 years. Omega-3 alone slowed the DNAm clocks PhenoAge, GrimAge2 and DunedinPACE, and all three treatments had additive benefits on PhenoAge. Overall, from baseline to year 3, standardized effects ranged from 0.16 to 0.32 units (2.9–3.8 months). In summary, our trial indicates a small protective effect of omega-3 treatment on slowing biological aging over 3 years across several clocks, with an additive protective effect of omega-3, vi
Unlocking the potential of cacao yield with full sun cultivation | Scientific Reports
Abstract
Cacao and chocolate production is a global industry worth around $133 billion. Full sun cultivation is a modern approach aimed at increasing yields. We evaluated six cacao clones (PS 1319, CCN 10, CCN 51, PH 16, SJ 02, and CP 49) grown under full sun conditions to assess their leaf physiology, leaf structure, yield, and yield components. Leaf physiology was measured through seven gas exchange parameters, while leaf structure was analyzed using eight measurements. For fruit and seed, we evaluated seven yield components. The clones showed differences in gas exchange. Clones PH 16 and PS 1319 had higher net photosynthetic rates per unit of leaf area (A), transpiration rates, and lower leaf internal CO2 concentrations. These A high values suggest the clones are well-acclimatized to full sun cultivation. Water availability, nutrient supply, and appropriate plant architecture also contributed to this acclimatization. Under high light intensity, the potential quantum yield of
Optical memory and counter using a graphene based hybrid plasmonic temporal integrator - Scientific Reports
Abstract
This paper presents design and analysis of an optical memory and counter based on ultra-compact temporal integrators (INTs) using a graphene hybrid plasmonic add-drop ring resonator (GHP-ADRR) and pulley-type ring resonator (GHP-PRR) for optical signal processing. Due to the valuable features of graphene hybrid plasmonic technology, the footprint of these INTs is equal to 4 × 3.5 µm2 for GHP-ADRR and 5.4 × 3.6 µm2 for GHP-PRR. Also, the performance of the INTs has been analyzed by the three-dimensional finite-difference time-domain method in the frequency and time domains, and the accuracy of the results has been compared with those of the math counterparts and also key specifications of the first-order temporal INTs including phase jump, insertion loss, 3 dB bandwidth, rise time, integration time window, and energy efficiency have been investigated. Based on the results, both circuits have better performance than the photonic counterparts. Furthermore, the performance
Some ferns from Mexico
Found a photos of ferns that I took during a visit to Cascadas Tulimán, in Puebla, Mexico, back in 2022.
Here is the biome:
I never got to identifying them, so any any input on potential IDs is welcome!
We present ErAs:In(Al)GaAs-based terahertz transceiver modules, comprising transmitter and receiver components integrated on a single chip. The transceiver module is employed in a two-port single-path (TxRx-Rx) or 1.5-port pulsed free space photonic vector network analyzer setup, wherein the second ...
Abstract
We present ErAs:In(Al)GaAs-based terahertz transceiver modules, comprising transmitter and receiver components integrated on a single chip. The transceiver module is employed in a two-port single-path (TxRx-Rx) or 1.5-port pulsed free space photonic vector network analyzer setup, wherein the second receiver is an individual ErAs:InGaAs photoconductor. This configuration allows for simultaneous extraction of transmission and reflection coefficients or scattering parameters S21 and S11. The system achieves a peak dynamic range of ~59 dB for S21 and ~43 dB for S11 at a bandwidth reaching ~3.5 THz for the transmission and ~2.5 THz for the reflection path. These values are obtained by averaging over 500 traces at a scan rate of 4 Hz. The system exhibits superior frequency coverage compared to commercially available electronic vector network analyzers, thus offering a compact, cost-effec
Scalable temporal multiplexing of telecom photons via thin-film lithium niobate photonics | npj Quantum Information
Abstract
Efficient single-photon generation remains a big challenge in quantum photonics. A promising approach to overcome this challenge is to employ active multiplexing—repeating a nondeterministic photon pair generation process across orthogonal degrees of freedom and exploiting heralding to actively route the heralded photon to the desired single output mode via feedforward. The main barriers of multiplexing schemes, however, are minimizing resource requirements to allow scalability and the lack of availability of high-speed, low-loss switches. Here, we present an on-chip temporal multiplexing scheme utilizing thin-film lithium niobate (TFLN) photonics to effectively address these challenges. Our time-multiplexed source, operating at a rate of 62.2 MHz, enhances single-photon probability by a factor of 3.37 ± 0.05 without introducing additional multi-photon noise. This demonstration highlights the feasibility and potential of TFLN photonics for large-scale complex quantum infor