(Tazkirah) POSISI KEDUA TANGAN KETIKA BERDO’A

Dari Al-Imam Muhammad bin Shalih al-Utsaimin rahimahullah berkata:

يجب ان تكون كيفية اليدين عند الدعاء بضم اليدين بعضهما إلى بعض ، كحالِ المُستجدي الذي يطلب مِن غيره أن يُعطيه شيئاً

“Wajib didalam tatacara memposisikan kedua tangan dalam berdoa adalah merapatkan kedua tangan tersebut, layaknya seseorang yang sedang berkebutuhan meminta sesuatu.

وأمَّا التَّفْريجُ والمباعدةُ بينهما فلا أعلمُ له أصلاً ؛ لا في السُّنَّةِ ، ولا في كلامِ العُلماءِ

“Adapun dengan cara merenggangkan kedua tangan hingga berjauhan, aku tidak mengetahui adanya dasar hukum untuk itu, dari Sunnah ataupun dari penjelasan para Ulama.”

(Asy-Syarhul Mumti’ 4/18)

(Quotes) Let yourself wander, try new things…

“Let yourself wander, try new things, travel, and get outside of your comfort zone.”

Tomas Laurinavicius

Tomas is a lifestyle entrepreneur and blogger from Lithuania. He writes about habits, lifestyle design and entrepreneurship. Right now, he’s traveling the world with a mission to empower 1 million people to change their lifestyle for good. Here’s Tomas’ best business advice for aspiring entrepreneurs wanting to start a business today:

“First, let yourself wander. Try new things, meet people outside of your comfort zone and travel.”

“Let yourself wander, try new things, travel, and get outside of your comfort zone.”

“It will help you design your personal MBA which will teach you more than any formal setting out there. Learn to read people, master the art of communication and become comfortable with being uncomfortable. Once you figure out what drives you, use that power to help people.

(TED) 3 Ways to Make Better Decisions – by Thinking like a Computer

“Computer science can help to make us more forgiving of our own limitations.”

He start by giving an example of finding a place to rent or buy in Sydney is difficult. In the competitive market, making an offer means you might lose out on a better option. The house hunting dilemma is an example of an “optimal stopping” problem.

Computer scientists have a solution and it goes like this. In order to maximize the probability of finding the best possible home, look at 37% of available accommodations and make an offer on the next place that is better than any you’ve already viewed. Or look for 37% of one month, 11 days, “to set a standard,” and then choose the best available option. 

The methods computers use to solve problems mimic how humans make decisions. Thus, applying computer science to everyday problems improves human decision making.

For example, choosing a restaurant employs what computer scientists call the “explore-exploit trade-off.”

Do you try something new (explore) or stay with something familiar (exploit) ? If you’re in an area for a short time, pick the exploit option. However, if you’re dining in your neighborhood, explore to gather information that will inform future choices.

“The value of information increases the more opportunities you’re going to have to use it.”

Babies explore by tasting every new thing they encounter. Meanwhile, the old man who goes to the same restaurant and orders the same thing each time is exploiting a lifetime of knowledge.

“Human lives are filled with computational problems that are just too hard to solve by applying sheer effort. For those problems, it’s worth consulting the experts: computer scientists.”

Computer science can even help you organize your closet. Most computers have a fast memory system with limited storage and a larger slow memory system. The most recently accessed data gets stored in the fast system, and the computer makes space by tossing something old into the slow memory system. Apply this principle to sorting your clothes by discarding items you haven’t worn for a long time. This convention works in the office, too. You’ve likely stacked that messy pile of papers on your desk according to how recently you used each document, with the most recent file sitting atop the pile.

“Computer science can help to make us more forgiving of our own limitations.”

These might seem trivial, but computer science also can help with life’s more difficult decisions. “The best algorithms are about doing what makes the most sense in the least amount of time.” Algorithms streamline information making it more manageable, and computers break big problems into smaller, simpler steps. The best approach such as the 37% rule of house hunting might produces the best solution given the circumstances.

Your choice may not be perfect.

It may overlook some options or involve settling for a satisfactory solution. But doing so is “what being rational means.”

(Well Test) Well Performance Diagram

pay attention to productivity index (J(ss)) and always remember that the actual well rate is fixed by the simultaneous solution of IPR and VLP curves.

Assumption (focus) : Factors which control the deliverability of a well under approximately stead-state condition.

Figure 1 talking illustrate a typical development of a large offshore field is illustrated where a number of deviated wells are drilled from separate platform locations in order to cover the whole reservoir.

The economics of such highly front-end loaded projects require that the oil production to be up and running as quickly as possible to the plateau level which corresponds approximately to 10% of recoverable reserves per annum.

In order to achieve the plateau rate as quickly as possible wells may be pre-drilled from a semi-submersible vessel and tied into a platform is completed these wells can be brought from the main platform. When the platform is completed these wells can be brought in immediately to give the maximum early production (for faster break-even).

The requisite number of wells is determined by dividing the overall plateau production by the obtainable production rate per well, therefore, the well deliverability is a question of great importance in the design of an offshore development.

However in the current circumstances where small fields are being targeted the minimum economic rate must be determined for each individual case and such factors as:

  • water depth
  • oil price
  • pipeline tariff
  • distance to existing facilities
  • total recoverable reserves

which all play important role in the project economics. The design problem then is to find the number of producing well (NP), such that :

In order to sustain oil production at plateau level the reservoir must usually be maintained by water injection and therefore (in Fig.1) peripheral water injection wells are also indicated and it’s just as important to get water into the reservoir as it is to get the oil out. In a balanced water flood the total rate of water injection on an in situ basis is equal to the total oil production rate; thus

Assuming the formation volume factor for water to be essentially unity. Here q(aq) is the natural water influx from the aquifer, B(o) is the formation volume factor and NI is the number of water injection wells. The required number of water injection (NI) can only be fixed if the strength of the natural water drive, q(aq), can be estimated; this is one of the most difficult prediction tasks in reservoir engineering. The end of plateau oil production is WBT (water breakthrough) of the producing wells.

Figure 2: System without artificial lift the steady-state rate which can be achieved by a well is determined by 2 resistance in series as illustrated in Figure 2.

Here fluid flows from the reservoir pressure, p(r), to a wellbore where the bottom-hole pressure is denoted p(wf) and then to the surface and into a separator pressure p(s).

The well rate at stock tank (surface) conditions, q(s) and the basic production problem is to predict q(s) given the reservoir and surface pressure. The first resistance is due to radial flow in the porous medium and the drawdown (pressure drop, p(r) – p(wf)).

In oil well, the flow in the porous medium is laminar (except at very high rate through a limited entry) and the linear relation between flow and pressure drop which leads to the definition of productivity index, J(ss)

Equation (1)

This equation linked flow-rate and pressure drop is known as IPR (Inflow Performance Relation)

Flow in tubing is more complicated and the relation between the oil volumetric flow-rate at standard condition, q(s), and the overall pressure difference for vertical lift, p(wf)-p(s), is non-linear. In general, vertical lift performance (VLP) can be written as

Equation (2)

Therefore, in order to determine well production flowrate, we need to solve equation (1) and (2) simultaneously for q(s) and p(wf), given J(ss) and f(VLP) which can be illustrated using figure 3. A well performance diagram is simply a plot of p(w) versus surface flowrate.

Re-arranging the definition of well productivity index (PI), shows that IPR is a straight line of the form

Figure 3

while the non-linear VLP maybe written as

The simultaneous solution of these 2 equations is the intersection of the respective lines on the well performance diagram which also known as the well operating point.

The total pressure drop available for flow, p(r)-p(s) has been divided between radial flow in the porous media and vertical flow in the tubing; the bottom-hole pressure, p(wf), adjust so that the flow predicted by the 2 models (equation (1) & (2)) is the same.

This calculation of the operating point by matching the IPR and VLP relations for specified reservoir and separator pressure is known as nodal analysis in production engineering.

In summary, pay attention to productivity index (J(ss)) and always remember that the actual well rate is fixed by the simultaneous solution of IPR and VLP curves.

Glossary

  • NP : number of producing well
  • q(aq) : aquifer water floor rate
  • B(o) is the formation volume factor
  • NI is the number of water injection wells
  • WBT (water breakthrough)
  • p(r), Reservoir pressure
  • p(wf), Bottom-hole pressure is denoted
  • p(s), separator pressure
  • q(s), well flowrate at stock tank
  • Drawdown, [P(r) – p(wf)]
  • IPR, inflow performance relation
  • VLP, vertical lift performance

(TED) How to Gain Control of Your Free Time

“We don’t build the lives we want by saving time. We build the lives we want, and then time saves itself.”


Time management and productivity expert Laura Vanderkam is the author of I Know How She Does it.

Popular time-saving tips include ideas such as recording your favorite TV shows so you can zip through the commercials or making only right-hand turns while running errands. But the shaving time off daily activities won’t produce much-needed extra hours. Instead of carving out time to do the things you want, prioritize what you want in life and do it.

Tip 1: Priorities what you want, so you’ll have the time to do what you want.

A time study of busy women juggling work, family and personal commitments found that time is highly adaptable. This is especially evident when an emergency strikes.

She given an example of when one of the study’s subjects came home to find that her water heater had flooded her basement, finding a plumber, hiring a cleaning company and arranging service calls took seven hours of her time that week.

Although she would testify to being too busy to spend seven hours a week, say, training for a triathlon or mentoring junior employees, her time expanded to cover this crisis situation. “I don’t have time” really means the task is not important to you, so handle your priorities as you would a broken water heater.

‘I don’t have time’ actually means it’s not a priority

“We don’t build the lives we want by saving time. We build the lives we want, and then time saves itself.”

Acknowledging that you don’t want to make time to do something reframes time as a choice.

Begin by identifying what’s truly important to you.

Imagine it’s the end of next year and you are writing three to five amazing feats you accomplished for a performance review.

Do the same thing for your personal life by pretending that you are composing next year’s holiday newsletter. Now, you have six to 10 goals for the following year. Break down these targets into manageable steps. For instance, if you’d like to run a 5 km race, research and create a training program. Give these activities as much import as a broken water heater by building them into your weekly schedule in advance. A good time to tackle this is on a Friday afternoon. Draw up a list with three headings: “career, relationships” and “self.” Write two or three items under each heading and place them on a weekly planner.

“Time is highly elastic. We cannot make more time, but time will stretch to accommodate what we choose to put into it.”

You may believe you are too busy for this method to work, but the numbers tell a different story. Of the 168 hours in a week, you spend 56 sleeping and 40 working, which leaves 72 hours open. Even if you work more than 40 hours a week, you still have many hours for other activities. A study showed that people significantly overestimate the number of hours they work. Maximize your small moments of free time instead of pulling out your phone or turning on the TV. Read a book during your commute. Enjoy a family breakfast or meditate during a work break. Even the busiest people make time for what matters most to them.