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Medium 9781601322388

Using the Centinel Data Format to Decouple Data Creation from Data Processing in Scientific Programs

Hamid R. Arabnia, George A. Gravvanis, George Jandieri, Ashu M. G. Solo, Fernando G. Tinetti CSREA Press PDF

Int'l Conf. Scientific Computing | CSC'13 |


Using the Centinel Data Format to Decouple Data Creation from Data Processing in Scientific Programs

Clarence Lehman1 and Adrienne Keen2

1 University of Minnesota, 123 Snyder Hall, Saint Paul, MN 55108, USA

2 London School of Hygiene and Tropical Medicine, Keppel St., London WC1E 7HT, UK

“Software is hard. It’s harder than anything else I’ve ever had to do.”

—Donald Knuth, 2002

Abstract— Multi-dimensional numerical arrays are a staple of many scientific computer programs, where processing may be intricate but where data structures can be simple. Data for these arrays may be read into the program from text

files assembled in advance, often laboriously from multiple sources or from large-scale databases. Notwithstanding simplicity in the structure of such files, their multi-dimensional nature and the very regularity of their data makes it difficult or impossible to know by inspection that they are assembled exactly as required by the processing programs. Moreover, data errors inadvertently may appear through unintended alteration of some parts of a file while other parts intentionally are being edited. Verifying the correctness of scientific programs is hindered by such difficulties. Here we describe how we have applied the Centinel archival data format to such problems. Centinel (1) provides a format that can be read without difficulty by both people and computers,

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Medium 9780819807885

Chapter Ten: Saturday Nightmare

Carol A. Grund Pauline Books and Media ePub

Danny held the terrarium up toward the window, peering at the fuzzy stuff inside. Ms. Wagner had given them strict orders not to open the jars—breathing in mold spores could be toxic. But Danny was determined to examine the contents from every possible angle.

“The carrot and potato definitely have the most mold,” he said. “The stuff on the cheese is the greenest and also has the most black dots. Are you writing this down?”

Two weeks had passed since they’d started the terrarium experiment, and today was their last chance to observe the results. After this they would throw away the unopened jars and begin writing reports from their notes.

As promised, Danny had stuck Anna Mei with all the note-taking. But after a bumpy start, she had actually enjoyed the project a lot. She thought it was pretty cool of Ms. Wagner to let them do such a unique experiment.

It turned out that not everyone shared her enthusiasm, though. The Ponytails, for example, expressed their distaste at every opportunity. Anna Mei had learned to say little and nod a lot whenever the subject came up. She didn’t want everyone thinking she was weird just because she liked science, even the icky parts.

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Medium 9780819854438

Nineteenth Week of Ordinary Time

Daughters Of St Paul Pauline Books and Media ePub

Nineteenth Sunday of Ordinary Time—Year A


Matthew 14:22–33


“Take courage, it is I; do not be afraid.”

As I pray with this Gospel account, I contemplate each part of it, entering into the story as if I too were with Peter and the other disciples in their boat. As they set off, the wind begins to rise, rocking their boat. In the heart of the night, as the wind tosses the disciples’ boat, Jesus comes “toward them walking on the sea.” I sense the fear that comes upon Peter and the disciples, but Jesus comforts and strengthens them, “Take courage, it is I; do not be afraid.” Jesus does not scold Peter for his fear, but simply calls to him, “Come,” thus inviting him to a deeper trust in Jesus and in his word. Peter leaves the security of his boat to follow Jesus. But when Peter takes his gaze off Jesus and looks around at the waves, seeing how strong the wind is, he starts to sink. But even in the midst of his panic and fear, Peter again turns his attention to Jesus, the only one who can save him. As soon as Peter cries out to Jesus, the Gospel tells us that “immediately” and without hesitation, “Jesus stretched out his hand and caught Peter.”

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Medium 9781605098869

27 Take a Mulligan

Mark Muchnick Berrett-Koehler Publishers ePub

I AM NOT an avid golfer. Actually I’m what some people would refer to as a hack—you’d best take cover when I’m at the tee. Admittedly, I have no business playing golf around people who take it seriously. But I do have a great appreciation for various aspects of the sport, one of the most intriguing of which is “taking a mulligan.” Even if you don’t play the game, the concept is easy enough to understand: a mulligan is a “second chance” that is typically offered in informal golf when you hit a bad shot. In other words, you are given the opportunity to hit your shot over again and the first one is forgiven.

Taking a mulligan in golf has many parallels to daily life. When we hurt people’s feelings, we apologize and can take a mulligan if they give us the chance to make it up to them. When we disappoint people, we can take a mulligan if they give us the chance to regain their trust. When we fail or fall short of others’ expectations, we can take a mulligan if they give us the chance to retrench and give it another try. Likewise, taking a mulligan is an opportunity we can give to others when they go astray, make mistakes, or don’t live up to the mark.

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Medium 9781847777416


Frederic Raphael Carcanet Press Ltd. ePub

Ramatuelle. In the early evening we walked along the high road. The village was a turban scarfed around the summit of its hill. Piles of cork, unsleeved from the raw tree-trunks, stacked by the roadside; insects chatter and scrape. Beyond the village, the silver necklace of the sea, polished by the sweep of the Camarat lighthouse.

In the deep night we bathed on the long white beach at Pampelonne. Afterwards we made goose-pimpled love on shingle that stuck and freckled the skin. We walked back through the vineyards, past the farms, heralded at each one by vigilant dogs. There was a villa on the main road blinded with shutters. I called it ‘eyeless in Gaza’.


The villagers go into St Tropez in the bus for fresh milk and other food. The village shop sells only eggs (sometimes) and tinned goods. Women collect water at the spouting fountain in thin-throated tin jugs.


The Auberge de l’Ancre. The villagers spoke of it reluctantly. An English couple, who had come to Ramatuelle for the day, told us that they went there for supper. Asked what there was to eat, the patron chuckled and eventually said, ‘Curried chicken, as much as you can eat, mille cinq cent francs.’ Could they get a drink first? He directed them upstairs to the bar. The room was filled with couches on which couples reclined, smoking what seemed to be reefers. A waiter asked them what they wanted. When they asked what there was, he said, ‘The usual.’

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