## power on – Samsung Smart TV keeps turning itself off

My 2013 Samsung Smart Hub TV keeps turning off by itself every five seconds. When I turn it on, five seconds later, it turns off and then back on, only to repeat this cycle for fifty times. I checked the software update and it’s apparently up to date, I checked the cable connections and they’re secure, and I rebooted my wifi a couple times. The issue still persists and seems to go away on its own, after 10-15 mins of the on-off cycle. This is driving me insane. Can someone please help? Thanks.

## Meme Monday: WHMCS’s Competition is Turning Heads

Recent changes by WHMCS have a lot of wandering eyes these days.

The post Meme Monday: WHMCS’s Competition is Turning Heads appeared first on Low End Box.

## unity – How do I correct the turning effects on my car in order for it to turn properly?

In my game, I’m currently working on a Physics-based car driving game in Unity from scratch. My problem is that whenever I press the input controls used for turning, instead of turning, my car does barrel rolls in the air. I’m using a document written about Car Physics by Marco Monster to aid some of my calculations in this post. I’ve looked at my code and suspect that the problem lies within this segment of my code. Please provide any feedback as it would be greatly appreciated.

``````//This section relates to low-speed cornering, not really useful for drifting
//This will determine the circle radius related to turning, in effect, calculating how much we turn
R = L / Mathf.Sin(userRight);

//Here, we calculate the vehicle's angular velocity in radians per second
//Omega (fancy w) represents angular velocity
// v represents velocity
rb.angularVelocity = rb.velocity / R;

//This section covers high-speed turning
//This relates to the car
//sideSlipAngle = Vector3.Angle(carTransform.forward, rb.velocity);
sideSlipAngle = Mathf.Atan(rb.velocity.z / rb.velocity.x);

//This relates to the wheels
for(int i = 0; i < 4; i++)
{
//alpha represents the slip angle for each wheel
alpha = Vector3.Angle(wheels(i).forward, rb.velocity);

//this equation is an approxiamtion of values below the peak shown in the graph
lateralForce = new Vector3(0f, 0f, corneringStiffness * alpha);

//These values are supposed to represent the magnitudes of these velocities
longVelocity = Mathf.Cos(alpha) * rb.velocity;
latVelocity = Mathf.Sin(alpha) * rb.velocity;

/*
Remember that these forces are supposed to be acting upon the wheels themselves,
*/

//The lateral velocity causes the cornering force to counteract it
//This relates to only the front wheels
frontSlipAngle = Mathf.Atan((latVelocity.magnitude + (rb.angularVelocity.magnitude * b)) / longVelocity.magnitude) - (userRight * Mathf.Sign(longVelocity.magnitude));
for (i = 0; i < 2; i++)
{
//Calculates the lateral force of the wheels
latFrontForce = lateralForce.normalized * (frontWeight.magnitude / 2f);
latFrontForce += latFrontForce;

corneringForce = latRearForce + Mathf.Cos(userRight) * latFrontForce;
lateralForce += latFrontForce;

frontTorque = Mathf.Cos(userRight) * latFrontForce * b;
}

centripedalForce = corneringForce;
steeringRadius = centripedalForce.magnitude / (rb.mass * Mathf.Pow(rb.velocity.magnitude, 2f));

//This relates to only the rear wheels
rearSlipAngle = Mathf.Atan((latVelocity.magnitude - (rb.angularVelocity.magnitude * c)) / longVelocity.magnitude);
for (i = 2; i < 4; i++)
{
//Calculates the lateral force of the wheels
latRearForce = lateralForce.normalized * (backWeight.magnitude / 2f);

latRearForce += latRearForce;
lateralForce += latRearForce;

rearTorque = -latRearForce * c;
}

}

totalTorque = frontTorque + rearTorque;
$$```$$
``````

## mysql – Why turning off condition_fanout_filter speed up query

``````bin/mysqld_safe --user=mysql --optimizer-switch=condition_fanout_filter=off --innodb-flush-method=O_DIRECT &
``````

Query (from TPC-H query-19):

``````SELECT Sum(l_extendedprice * ( 1 - l_discount )) AS revenue
FROM   lineitem,
part
WHERE  ( p_partkey = l_partkey
AND p_brand = 'Brand#52'
AND p_container IN ( 'SM CASE', 'SM BOX', 'SM PACK', 'SM PKG' )
AND l_quantity >= 4
AND l_quantity <= 4 + 10
AND p_size BETWEEN 1 AND 5
AND l_shipmode IN ( 'AIR', 'AIR REG' )
AND l_shipinstruct = 'DELIVER IN PERSON' )
OR ( p_partkey = l_partkey
AND p_brand = 'Brand#11'
AND p_container IN ( 'MED BAG', 'MED BOX', 'MED PKG', 'MED PACK' )
AND l_quantity >= 18
AND l_quantity <= 18 + 10
AND p_size BETWEEN 1 AND 10
AND l_shipmode IN ( 'AIR', 'AIR REG' )
AND l_shipinstruct = 'DELIVER IN PERSON' )
OR ( p_partkey = l_partkey
AND p_brand = 'Brand#51'
AND p_container IN ( 'LG CASE', 'LG BOX', 'LG PACK', 'LG PKG' )
AND l_quantity >= 29
AND l_quantity <= 29 + 10
AND p_size BETWEEN 1 AND 15
AND l_shipmode IN ( 'AIR', 'AIR REG' )
AND l_shipinstruct = 'DELIVER IN PERSON' );
``````

### condition_fanout_filter=off

``````RESULT:  1 row in set (13.73 sec)
``````

explain:

``````+----+-------------+----------+------------+------+---------------+--------------+---------+---------------------+--------+----------+-------------+
| id | select_type | table    | partitions | type | possible_keys | key          | key_len | ref                 | rows   | filtered | Extra       |
+----+-------------+----------+------------+------+---------------+--------------+---------+---------------------+--------+----------+-------------+
|  1 | SIMPLE      | PART     | NULL       | ALL  | PRIMARY       | NULL         | NULL    | NULL                | 198000 |   100.00 | Using where |
|  1 | SIMPLE      | LINEITEM | NULL       | ref  | LINEITEM_FK2  | LINEITEM_FK2 | 4       | tpch.PART.P_PARTKEY |     30 |   100.00 | Using where |
+----+-------------+----------+------------+------+---------------+--------------+---------+---------------------+--------+----------+-------------+
``````

### condition_fanout_filter=on

``````RESULT:  1 row in set (30.57 sec)
``````

explain:

``````+----+-------------+----------+------------+------+---------------+--------------+---------+---------------------+--------+----------+-------------+
| id | select_type | table    | partitions | type | possible_keys | key          | key_len | ref                 | rows   | filtered | Extra       |
+----+-------------+----------+------------+------+---------------+--------------+---------+---------------------+--------+----------+-------------+
|  1 | SIMPLE      | PART     | NULL       | ALL  | PRIMARY       | NULL         | NULL    | NULL                | 198000 |     1.33 | Using where |
|  1 | SIMPLE      | LINEITEM | NULL       | ref  | LINEITEM_FK2  | LINEITEM_FK2 | 4       | tpch.PART.P_PARTKEY |     30 |     0.67 | Using where |
+----+-------------+----------+------------+------+---------------+--------------+---------+---------------------+--------+----------+-------------+
``````

From column ‘filtered’, “condition_fanout_filter=on” should be faster.

## Other important things

this only happens in the `15k RPM SAS 600GB HDD` and with `--innodb-flush-method=O_DIRECT`.
Either using an SSD or not set O_DIRECT, this problem would disappear.

## Turning a Tree to a Binary Tree

Is there a way to turn a tree(defined in binary tree) to a real binary tree?

``````typedef char ElemType;
typedef struct Tnodes
{
ElemType data;
struct Tnodes* FirstChild;
struct Tnodes* NextSibling;
} TNode;
``````

## windows 10 – What could be the reason behind a PC not turning on after changing the hard drive?

Just recently I was trying to install Windows 10 on my new SSD drive, while having HDD unconnected. Then I booted autoinstaller from USB and found out that my SSD was missing from the list(possibly because it wasn’t initialized first). After that, I shut down the PC and reconnected the HDD drive(to initizalize the SSD from it) without changing anything else. Now, the PC won’t turn on at all; it doesn’t start the fans and the motherboard. I guess that either the motherboard is dead, or the power supply, but it seems a bit strange because the only thing I’ve changed since it was working was the hard drive. I’ve already checked the minor connections and problems, like a disconnected power button and the motherboard’s battery.

Could be there some other possible reasons for this unhappy event?

## First person camera turning 3D

I know how to make the effect of moving an object on the z axis, and strafing, but how do you make the effect of the view turning, I don’t use any 3d libraries or engine

## How to restore screen to normal size after turning off the MIUI optimization?

My phone is Xiaomi Redmi Note 9, how can I restore the screen size of my phone after turning off the MIUI optimization even if I turned it back on? Before i have small screen size and small fonts ‘coz it’s what i prefer and now they got bigger. Please help i don’t know what to do.