Problem: Article: Don't preheat the oven; you want your plates to slowly warm along with the oven. Introducing room temperature plates to a very hot oven can make them crack or shatter completely. You can put your plates on a baking pan or directly on the oven racks. The plates will have warmed up to this temperature along with the oven. This allows the paint to "cure," or set into the ceramic. If your ceramic paint instructions suggest a different temperature or baking time, follow that instead. Once the oven temperature has reached 325F (163C), leave it on for 40 minutes. You can set a timer on your oven, phone, or a watch to keep track of the time. Most ovens will beep when the chosen temperature has been reached, so set a timer at that point. You want the temperature of your plates to slowly cool down along with the oven. If you handle the plates too early, you can break them. Cooling times depend on your oven but wait at least 2 hours before checking the temperature. Be patient and don't touch the plates while they're still cooling in the oven. Since your oven should be completely cooled, the plates should be cool to the touch as well. You can use oven mitts to remove your plates to be safe. Put your plates in a place where they won't be disturbed by children or pets. Let them rest for at least 3 days before you use them or wash them. Hand wash them for the first time. While washing them, you can check your painted designs and make sure the plates were not damaged while baking in the oven.
Summary: Place your plates in a cold oven. Let your oven reach 325F (163C) while the plates are inside. Leave your oven on for 40 minutes to let the plates cure. Turn off your oven to let your plates cool. Remove your plates from the oven once the oven is cooled. Allow the plates to rest for at least 3 days before using or washing them.

Problem: Article: Each iPad has a couple of different variations, typically comprising a Wi-Fi-only version as well as a version that supports both Wi-Fi and cellular data. This is why one iPad type (e.g., an iPad Mini) can have several different model numbers applied to it. Your iPad's type (according to the model number) does not change the device's physical dimensions (e.g., an iPad Air with cellular is the same size as an equivalent iPad air with Wi-Fi only). The model number is located at the bottom of the back of the iPad's housing, so anything covering this area must be removed. At the very bottom of the iPad's back, you should see a few lines of text; the model number is on the far-right side of the top line of text, right next to "Model". Your model number will be in A1234 format. As of April 2017, all current iPads and their corresponding model numbers are as follows: iPad Pro 9.7-inch - A1673 (Wi-Fi only); A1674 or A1675 (Wi-Fi and cellular). iPad Pro 12.9-inch - A1584 (Wi-Fi only); A1652 (Wi-Fi and cellular). iPad Air 2 - A1566 (Wi-Fi only); A1567 (Wi-Fi and cellular). iPad Air - A1474 (Wi-Fi only); A1475 (Wi-Fi and general cellular); A1476 (Wi-Fi and TD/LTE cellular). iPad mini 4 - A1538 (Wi-Fi only); A1550 (Wi-Fi and cellular). iPad mini 3 - A1599 (Wi-Fi only); A1600 (Wi-Fi and cellular). iPad mini 2 - A1489 (Wi-Fi only); A1490 (Wi-Fi and general cellular); A1491 (Wi-Fi and TD/LTE cellular). iPad mini - A1432 (Wi-Fi only); A1454 (Wi-Fi and general cellular); A1455 (Wi-Fi and MM cellular). iPad Generation 5 - A1822 (Wi-Fi only); A1823 (Wi-Fi and cellular). iPad Generation 4 - A1458 (Wi-Fi only); A1459 (Wi-Fi and general cellular); A1460 (Wi-Fi and MM cellular). iPad Generation 3 - A1416 (Wi-Fi only); A1430 (Wi-Fi and general cellular); A1403 (Wi-Fi and VZ cellular). iPad Generation 2 - A1395 (Wi-Fi only); A1396 (GSM cellular); A1397 (CDMA cellular). Original iPad - A1219 (Wi-Fi only); A1337 (Wi-Fi and 3G cellular). For example, if you're buying a specific charger or a case for your iPad, knowing the model number will help you determine the size or type of the item.
Summary: Understand how model number variations work. Remove your iPad's case if it has one. Locate the model number. Match your iPad's model number to the appropriate model. Use your iPad's model number to inform hardware decisions.

Problem: Article: Being hungry can depress your mood and make you more susceptible to panic attacks. Keep your blood sugar regulated by eating regularly and not letting yourself get too hungry. Have small snacks in between meals as well. Never skip meals. This causes a blood sugar crash and will depress your mood. Eat as many fresh foods as possible. There isn't much research confirming it, but healthy eating does have some links with less anxiety and stress. If you're often on the move, plan ahead and pack some snacks. A quick granola bar or bag of nuts can prevent a blood sugar crash. While many herbs and essential oils claim to reduce anxiety, only a few have been studied. Stick with treatments that doctors have evaluated and approved for anxiety-reduction. Always consult your doctor before taking herbal supplements to make sure they won't interact with any medications you're taking. Some herbs that may be effective are passionflower, chamomile, valerian root, and lavender. These ingredients come in supplements or teas that you can take daily. Always follow the dosing instructions on these products and don't take more than directed. Kava was once considered an effective anxiety treatment, but new studies show that it can cause liver damage. Avoid this treatment. These substances might make you feel better in the short-term, but they could increase your anxiety and risk of panic attacks. Avoid all illegal substances, and keep your drinking limited to 1-2 drinks per day. Since nicotine is a stimulant, avoid smoking as well. Some drugs, particularly hallucinogens, can trigger panic attacks. If you regularly cope with your anxiety by drinking or using drugs, you may develop an addiction. Speak with your doctor if you have trouble quitting.
Summary: Eat at regular times to avoid a blood sugar drop. Try some calming herbal treatments. Avoid drugs, smoking, and excessive drinking.

Problem: Article: This method is similar to the cut-and-cover method, but is used for digging underwater tunnels. The trench needs to run the length the tunnel will run underwater. Each tube is sealed at either end with a bulkhead. If the tube is for a car tunnel, as in the case of the Ted Williams Tunnel in Boston, the tubes include pre-built road sections. For the Ted Williams Tunnel, this was a 5-foot-thick (1.5 m-thick) layer of rock. Any road or rail segments built into the tubes would be connected at this time as well.
Summary:
Dredge a trench when the tunnel will go. Lay a series of steel tubes along the length of the trench. Encase the tube with enough backfill to withstand the water pressure above it. Connect the tubes by removing the intervening bulkheads.