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hierarchical – Simultaneous infinite vertical scrolling and horizontal scrolling on a page

I want to create a collaboration hierarchy that allows for infinite threading of parent/child relationships. To do so would require a page that enables both vertical scrolling and horizontal scrolling simultaneously.

Also, is lazy loading possible in a situation like this?

Thanks to anyone who can offer a solution.

php – Contenedor con scroll vertical toma como hijo a un hermano

Tengo un problema, es que tengo un div con un scroll vertical dentro de una card de bootstrap, tiene un hermano que tiene un input y un boton para enviar un mensaje (es un chat), pero el navegador toma a este este hermano, el que tiene el input, como hijo del div con scroll cuando son hermanos y son hijos de la card. (dejare incluso un poco de php por si tiene algo que ver, no tengo ni idea)

<div class="card">
                <h5 class="card-header">Chat de: <strong>User</strong></h5>
                <div class="card-body">
                    <div style="height: 25em; overflow-y: scroll; margin-bottom: 1em;" class="container_chat">
                        <?php while ($msg = mysqli_fetch_array($process_msg)) { ?>
                            <div class="msgs" style="height: auto;">

                                <?php if ($user_id == $msg('para')) { ?>
                                    <div class="msg1 d-flex align-items-center my-1">
                                        <img src="" alt="" class="rounded-circle" style="width:50px; background-color: gray;">
                                        <p class="alert-secondary p-2 m-0 ml-2" style="border-radius:15px;"><?php echo $msg('msg'); ?></p>
                                <?php } else { ?>
                                    <div class="msg2 d-flex my-1 mr-4 align-items-center justify-content-end">
                                        <p class="alert-primary p-2 mr-2 m-0 " style="border-radius:15px;"><?php echo $msg('msg'); ?></p>
                                        <img src="" alt="" class="rounded-circle" style="width:50px; background-color: gray;">
                    <?php }} ?>

                    <div class="write">
                        <form action="send_msg.php" method="POST">
                            <div class="input-group">
                                <input type="text" class="form-control" placeholder="Escriba un mensaje" aria-label="Recipient's username" aria-describedby="button-addon2" name="msg">
                                <div class="input-group-append">
                                <input type="hidden" name="id" value="<?php echo $chat_id; ?>">
                                <input type="hidden" name="de" value="<?php echo $user_id; ?>">
                                <input type="hidden" name="para" value="<?php echo $para; ?>">
                                <button class="btn btn-primary" type="submit">Enviar</button>

introducir la descripción de la imagen aquí

Como pueden ver el navegador encierra todo dentro de el div con scrollbar (container_chat), no se que hacer, esto hace que cuando hagas scroll hacia arriba se oculte el input cuando hay muchos mensajes. Gracias

dnd 5e – How to map out and run an encounter set in a predominantly vertical area online?

Something like this. If you really want to have interesting stuff on all four sides of the shaft, have four adjacent rooms/maps that turn the corner at the edges. If the shaft is small enough to where people might be jumping across or shooting ranged weapons or something, just note down the distance across and use that when judging whether people can target or move to spaces of similar height on the other 3 pages.

I’ve done muliti-page battle maps for Z-levels in primarily horizontal dungeons with significant vertical elements for a particular room before. It slows things down significantly on Roll20 as compared to real-life because moving tokens large distances is really annoying due to the tabletops problematic interaction with scrollbars. It also took a couple minutes for the slower players to learn how the maps related to each other. Nevertheless, it worked out fine– the decrease in speed wasn’t crippling and the ability to make use of the additional spacial relations in the room was exciting for some of the players.

I’ve used side-view dungeons before. They work fine and are immediately obvious even to most very-slow-to-learn players, though I imagine that would be different if you were playing with someone who had great difficulty learning new ways of doing things and had a lot of experience with top-down battlemaps. They are appropriate for primarily vertical spaces, and benefit from a sort-of genre convention that one of the two horizontal axes not be particularly interesting in combat nor difficult to map without representation, sort of like Z-levels in conventional dungeons.

algorithms – Analysis of kd-tree, how is the vertical line L’s intersect areas equivalent to sqrt(N)?

I’m trying to understand how the number of intersected areas by a vertical line in a KD-tree is equivalent to sqrt(n)

If you draw a balanced KD-tree with 7 nodes.
enter image description here

And then draw a vertical line l.

enter image description here

The number of areas this line intersects should be equivalent to sqrt(N) where N is amount of nodes. (7)

When I count the areas the vertical line L intersects I get 5. But sqrt(7) = 2,6 not even close.

Both sources get to the recurrence:

enter image description here

Which solves to O(sqrt(N)).

What am I doing wrong?


Source 1

Source 2

website design – Vertical tabs to horizontal tabs

Is there any comment or best practice to use the below case

I have a vertical tab of material design used in desktop version of a website portal. It is a Resposive web and when the viewport size is reduced for mobile devices the same tabs are made as horizontal tabs.

Any ideas on if this can be implemented and is a good way to use? or Any ways to improvise this case?

Please note: this is a patch that is asked for and not a design phase problem that should have been taken care of.

engineering – 1D Wave Equation: Vertical Rod and Displacement vs. Textbook Solution

I am trying to setup Mathematica to analyze a vertical round rod under its own weight, fixed on one end free on the other. I have the 1D wave equation and a distributed load to represent the self weight of the round rod.

Vertical Rod Layout

The problem is when I compare the Mathematica solution to the textbook solution the two do not agree.

Sample problem is given below.

Y = 199*^9; (*Young's modulus in Pa *)
(Rho) = 7860; (* Steel density in kg/m^3*)
dia = 1/39.37; (* 1" dia converted to meters*)
c = Sqrt(Y/(Rho));
len = 1000; (*length in meters*)
tmax = 5; (* Max time for analysis*)
area = (Pi)*dia^2/4; (*Round rod cross sectional area*)
wtfactor = (Rho)*9.81*area/len;

frwt(x_) := (Rho)*
   area*9.81*(1 - 
     x/len); (*Rod Self weight imposed as a distributed load*)
    nsol6 = NDSolve({D(z(x, t), {t, 2}) == 
    c^2*D(z(x, t), {x, 2}) + frwt(x) + NeumannValue(0, x == len), 
   z(0, t) == 0}, 
     z(x, t), {x, 0, len}, {t, 0, tmax}, 
  Method -> {"FiniteElement", 
    "MeshOptions" -> {"MaxCellMeasure" -> 10}})
fnnsol6(x_, t_) = nsol6((1, 1, 2))
Plot3D(fnnsol6(x, t), {x, 0, len}, {t, 0, tmax}, 
 PlotLabels -> Automatic, AxesLabel -> Automatic)

deltaL = (((Rho)*9.81*len^2)/(
 Y*2)) (*Textbook elongation for a vertical rod under self weight*)
calcdeltaL = 
  5) (*Calculated delta Length from PDE solution.  Should match 

deltaLfunc(x_, l_) := (Rho)*9.81*
  x*(2*len - x)/(2*Y) (*Verified Correct*)
xydata = Thread({Range(0, 1000, 100), 
    deltaLfunc(x, 1) /. {x -> Range(0, 1000, 100)}});

Show(Plot(fnnsol6(x, 0), {x, 0, len}, PlotLabels -> {"PDE Val"}, 
  PlotRange -> All
 ListLinePlot(xydata, PlotStyle -> Green, PlotLabels -> {"Correct"}))

If you’ve read this far, thank you.

In summary my question is: Is this a Mathematica issue or a PDE setup problem? The PDE is right out of a textbook so I don’t think that’s the problem but Mathematica gives no errors and I am out of troubleshooting ideas so looking for some help.

Thank You

usability – Technical terms linking vertical lists to Instructions

I once read a study where it described that displaying information vertically hints/implies to the user that it is instructions. I tried searching for proof of this concept again and couldn’t find it this time.

Does anyone know any key terms/concepts relating to information being displayed vertically rather than horizontally means its implying that the information is instructions/guidelines to follow.

Heres an example of what I mean.

enter image description here

fujifilm – The vertical power handle FuliFilm XT2 and VPG-XT2 cannot record 4k videos with a longer duration

I have and Fuji XT-2 with vertical power grip, which should increase the duration of the 4k video recording from 10 to 29 or 30 minutes.

I can't do that.

I have real batteries in good condition.

I use an Extreme PRO 128 GB SDXC memory card with up to 170 MB / s, class 10, U3, V30

My shooting mode is 4K 29.97P

I switched the boost mode on and off.

In both cases I get 5 minutes and 20 seconds.

Each file approximately 4 GB

Am I misinterpreting the 10 or 30 minute specification? Does it mean anything else?