Showing posts with label the. Show all posts
Showing posts with label the. Show all posts

Wednesday, March 18, 2015

Panama Canal What is the Panama Canal

One of the most important construction  projects in the history of mankind was the building of the Panama Canal.
The Panama Canal has influenced the development of trade across the globe.
The construction of the canal, shortened the distance between many ports on the Atlantic and Pacific oceans for about 8,000 miles (13,000 kilometers).
According to the first idea, the Panama Canal was supposed to be built by the French at the level of the sea, with depth of 30 feet (9 meters), and width at the bottom of 72 feet (22 meters).
However, the French plan was not realized and in 1904 The United States accepted the construction of the canal.
The French plan to dig a canal below the water level, from one ocean to the other, was dangerous.
In fact, if the differences between high and low tide on one side of the ocean were larger than the other, there would be major currents trough the channel.
This plan also required a lot more digging. Given these problems, it was decided to build a canal with locks, which meant that it must provide water at a higher altitude, in order to meet more parts of the channel.
This has been achieved with the erection of dams on the Chagres River.
Dams form one kind of staircase, through which the ships come into the channel. Ships are raised in some places where the water level is higher, and then descend to the other places.
Almost half of the canal passes through Lake Gatun.
Ships coming from the Atlantic are raised to the level of the lake by 92 feet (28 meters) through a series of three dams. On the other side - Pacific Ocean there is one notch 8 miles (13 kilometers) long. The ships then are being suspended 33 feet (10 meters) in the first dam and 60 feet (18 meters) through two other dams, so go down to sea level. Through the dams the ships are pulled with electric locomotives moving along the coast. Today, trough the dams even the largest ships can move.







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The Squid Giant Axon


This post is dedicated to the squid giant axon (not the giant squid axon, although there is presumably a giant squid giant axon – and it’s really big!)  These axons carry information to the muscles of a squid’s mantle when it is startled, causing them to contract and jet to safety.  These axons are notable because they are so large – up to 1mm in diameter.  If this doesn’t seem large to you, consider that typical axons in humans are only a few micrometers in diameter.  The squid giant axon is several hundred times larger than the typical human axon.  You can see the axon in question in this diagram, labeled “III” (It turns out that the axons commonly studied are the third step in the chain of large axons that carry this specific information; hence they are often referred to as “tertiary giant axons.”)
If you haven’t heard of the squid giant fiber system before, you are probably thinking “So what?”  Well, I’ll tell you what.  Nowadays, we have technologies that let us interact with various neurons in various ways.  For example, we can use tiny glass pipettes to inject current or voltage into a neuron or record its activity.  We can use arrays of electrodes to do the same thing with a large population of neurons.  These procedures are rather routine in neuroscience, and are done with many different types of neurons in a great variety of animals and specific preparations.
When J. Z. Young was dissecting squid in the 1930’s, however, the techniques available to him were not so refined.  He devised a way to isolate a single neuro-muscular unit from the rest of the squids anatomy and manipulate it (see The Function of the Giant Nerve Fibres of the Squid for his description of the procedure – I highly recommend this article, as he’s a great writer and it really is a classic in the history of neuroscience.)  Although there were already theories of action potential conduction (notably, Bernstein’s theory that action potentials propagated due to changes in ions flowing across the cell membrane, which turned out to be correct,) Young’s preparation allowed him to directly demonstrate basic properties of single nerve cells.  This allowed theories about neuronal function to be empirically tested at a whole new resolution.  For example, in the paper cited above, he clearly demonstrates the all-or-none nature of action potentials (that is, when neurons are stimulated, they have a binary response: they either send an action potential down their or they don’t.  There are no graded, partial responses.)
Young’s technique opened up the squid giant axon as a model system for many investigators who were trying to understand the behavior of neurons.  Notably, Hodkin and Huxley developed a quantitative model of the propagation of action potentials using this preparation, in a famous series of papers that are summarized in A Quantitative Description of the Membrane Curent and its Application to Conduction and Excitation in Nerve.  Essentially, the squid giant axon preparation gave researchers an incredible tool, with which they developed the basic models and techniques (for example, the development of voltage clamp by Kenneth Cole in the 1940’s, which allowed the ionic basis of action potentials to be investigated.)
In short, the basic electrophysiological techniques that are in use today almost all stem from Young’s work with the squid giant axon.
On a tangentially related note, Young spent much of the rest of his career trying to convince the scientific community that invertebrates, especially cephalopods, were good model animals with which to study neuroscience.  At length, he’s convinced me, as well as (at least some) contemporary scientists, as evidenced by this recent review of the octopus as a model organism for studying memory systems (The Octopus: A Model for a Comparative Analysis of the Evolution of Learning and Memory Mechanisms ).
I have my own ideas about why it’s particularly good to study octopus; but alas, that’s for another post.
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Carbon Prints and Gum Bichromate Prints The Invention of Photography Video Series

Carbon Prints and Gum Bichromate Prints - The Pigment Processes - Invention of Photography 5.44 min video created by George Eastman House.
Carbon prints and gum bichromate prints are both examples of pigment processes. Rather than the metal salts typically used in the formation of photographic images, pigments and bichromated colloids are used in making these prints. A bichromated colloid is a viscous substance such as gelatin or albumen that is made light-sensitive by the addition of a bichromate. Bichromated colloids harden when exposed to light and become insoluble in water; this is the principle behind many of the non-silver-based photographic processes. Pigment processes were developed in the 1850s and offer superior permanence and control of the appearance of the final print. The resulting prints are characterized by broad tones and soft detail, sometimes resembling paintings or drawings.


(This video is made possible by a grant from the U.S. Institute of Museum and Library Services, grant number MA-10-13-0194.)
George Eastman House, an independent nonprofit museum, is an educational institution that tells the story of photography and motion pictures—media that have changed and continue to change our perception of the world.

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Tuesday, March 17, 2015

The New Face of the Project Team Member


HUMAN BODY SYSTEM DIAGRAM :

Quiz: Heres the scenario: In the Chevron Corporation, a project team was commissioned to manage the design, funding and construction of a large plant to manufacture a product that was in great demand and offered significant margins. After many months of work, the project team finally completed the project - ahead of schedule and under budget. The plant was opened to much fanfare, and the project team celebrated its achievement.



The New Face of the Project Team Member

Got it? Heres your one-question quiz: Was the Chevron project a success? (Take your time answering. No ones looking over your shoulder.) By now, you may have suspected that the question contains some hidden trick. Youre right. The fact is, you havent been given enough information to evaluate the success or failure of the Chevron project. A correct answer in this case would have been to ask for more information about the larger organizational context or to inquire about what happened next. Okay, so the above exercise was a little manipulative. But it illustrates a common trend in project management: the tendency to evaluate project success too quickly, too narrowly or with shortsighted criteria. The traditional measurements criteria of schedule, budget and quality, on their own may no longer be sufficient.


Case in point: Lets return to Chevron for the rest of the story. Very soon after its glorious opening, the Chevron manufacturing plant failed and was sold. As it turned out, the market for the high demand, high-market product was a volatile one, prone to change quickly. And change it did. Had the project team considered the possibility of this market change, they surely would have explored the option of shelving the project altogether.

Now which criteria would you use to determine success? If you were to consider only the traditional criteria of budget and schedule, you would have concluded that the project was a smashing success. But if the criterion is value added to the business, the project failed abysmally. And its here that we can observe the need for project team members to begin thinking about their work in different ways. But isnt such market forecasting the responsibility of leadership? Isnt it unrealistic to expect that kind of strategic thinking from our already-stressed, neophyte project team members? Perhaps that was once true. But the world has changed.

A New Way to Think about Projects

In the new world of work, the familiar project has become a very different entity.

Carl Pritchard, PMP and principal of Pritchard Management Associates, has lectured and written extensively on the subject of project management. He sees many new trends in project management, not the least of which is the changing profile of the people who are being called upon to lead projects. "What I see in the classroom is interesting," he says. "Its an amalgam of old timer project managers who have been doing it for years without any formal processes in there with a lot of new folks who are just entering the practice. In many instances, these new people are joining project management on the heels of success they had in some other part of the organization. They were pulled off some organizational effort, and management is now looking for a new home for them. Poof! Theyre expected to be project managers."

Whats behind this new trend of putting more and more people on a rapidly growing number of projects? Pritchard suggests that one major cause is the near obsessive customer focus that has become the focal point of organizing for so many businesses. This intense customer focus requires a special touch in fostering new processes and relationships. And that touch must come from individuals who can marshal and control resources and who can recognize when a project is faring well and when it needs more intense time and attention.

One would be hard-pressed to complain about a customer-service orientation. But the new sense of urgency is thrusting onto project teams a lot of people who are not fully equipped. Many still are learning "the hard way" - let em learn it on the fly and hope they dont foul it up. At the very least, many are being trained in the basic principles and tools in the Project Managers Body of Knowledge (PMBOK). But how many are being trained to ask the kinds of questions that could have prevented the painful Chevron fiasco? If youre thinking PMBOK is enough grounding, think again. Those are implementation techniques - a great place to start, but hardly a full tool box. More is needed.

"We should be training our project teams to be more," Pritchard agrees. "They need to be entrepreneurs. Consultants. Even agents of change. We need to build the confidence of these individuals to serve the organization with a willingness to effect change without apology and to implement change with an understanding of all those it will affect." The profile of successful project teams is changing. Success will now require the people on those teams to take on new skills and responsibilities. These include:

  • Strategic, big-picture thinking
  • Continual reassessment of the risk and opportunities throughout the project
  • Sensitivity to all critical stakeholders and sponsors
  • An environment of openness and trust

Strategic, Big-Picture Thinking

As the Chevron project team members painfully learned, projects dont exist in a vacuum. In the end, the project teams that deliver value to the organization will be the ones who are keenly attuned to the organizational strategies and objectives. Lynne Hambleton, manager of learning systems at Xerox, agrees. "Im aware that many organizations measure project success using the traditional criteria - such as time, cost, scope," she says. "But that just doesnt fly in our culture, where quality is important, and our Malcolm Baldrige award continues to set a legacy for excellence. Those traditional criteria just dont get us there. Thats why, at Xerox, our projects must always speak to value provided, whether thats value to Xerox or to the client. We make it clear that project teams must offer solutions that support strategy. Thats a lot more complex than the old way of thinking."

Continual Reassessment of Risk and Opportunities

The project team may be doing things the right way - but are they still doing the right thing? Thats the kind of question that characterizes todays new breed of project managers. At Xerox, project team members are trained to continually assess both risks and opportunities from the inception to the completion of the project.

"Just about everyone involved in the project is asking questions like, Whats going on in the larger context? What could derail our efforts?," says Hambleton. "Project team members certainly ask those questions. And the operations side of the team is definitely asking those questions a lot because theyll be the ones running the effort after the project is done. They are constantly held accountable because theyre going to be living with it."

A Sensitivity to Critical Stakeholders and Sponsors

Nothing scintillating here; its in all the basic texts. Yet the critical process of managing stakeholders continues to be ignored. Its the oldest story in the book: The project was delivered skillfully, but a key stakeholder was left out of the process... and the project choked. Its sobering to realize that these stakeholder interests are almost never hidden. In fact, they are often quite overt. But if the project team members dont ask, stakeholders interests wont be spelled out in the statement of work or the contract. The make-it-or-break-it criteria never even show up on the project teams radar screen.

Pritchard offers this example: "I met with my contractor just this morning to talk about the addition were putting on our home. He hammered me with all the right questions. "Who will I talk to?" "Who might I talk to?" "Who will sign the changes?" "Who will be around the day they place the Porta-John?" They were great questions! The barrage was almost too much for me. I started thinking about the many project managers who would rather put off those difficult discussions until later, after the relationship develops. But my contractor is building our relationship now. Hes not wasting time. As a result, hes going to have a very clear understanding of my expectations - just as I will have a clear understanding of his."

Trust and Openness

Perhaps its the many technical tools of project management - the risk assessment grids, the Gantt charts, the budget sheets - that lull well-intentioned project teams into the mistaken belief that their role is itself technical. But success isnt built exclusively on deadlines, budget and quality. Remember, there are people involved here. And the wheels of relationships are greased by those old nonquantifiables of trust and openness. Pritchard agrees. "Project management has long been a somewhat furtive practice where we (the practitioners) take it upon ourselves to hide extra money and time without letting the customer know were doing it and why," he says. "Honest project management is going to be the successful project management over the long term. Some organizations cannot support overt communication about risk, time and cost slippage, and team relationships. Those organizations should be out of the project management business in the not-too-distant future."

Ripples of Change

The skill-building approach to project management is giving way to a new paradigm: the culture creation approach, in which project management is a holistic process, nurtured by the organizations shared beliefs, attitudes and infrastructure. But cultures can be slippery things. How does one create a culture where project team members enthusiastically embrace the new attitudes, beliefs and skills that lead to success? At Xerox, its a matter of education. And not just the dry flip-chart-and-lecture kind of education; Hambleton immerses people in the subject in the most compelling way of all: experientially. Using a discovery learning simulation, Xeroxs Hambleton equips project team members in a low-risk, high-involvement learning environment. The participants become instant project managers and are quickly connected to the models of Gantt charts, resource allocation grids and critical-path diagrams.

As more and more companies are beginning to embrace this strategic partner approach to project management, success stories are already emerging and offering a tantalizing glimpse of the possibilities. At AT&T, project team members from many divisions are brought in at the earliest conceptual planning stages of an effort. Schneider National formalized its tracking and status reporting and introduced common project management language across lines of business. And at NCR, team members begin assessing opportunity and risk on day one... and continue until completion.

To be sure, at each of these organizations the traditional tools of PMBOK are still firmly in place. So what distinguishes them from others? Look a little deeper and youll find some new assumptions at work: project work teams are most enabled when members see themselves as leaders, strategic partners and entrepreneurs. And leaders, partners and entrepreneurs are developed only when organizations embrace employees as whole people. As is often the case with success stories, the victory arises not from the tools but from human beings. Now theres an assumption worth embracing.

The Learning Connection

So how does one communicate new principles about project management in a way that leads to a culture shift? Based on her own experience with a discovery learning simulation, Xeroxs Lynne Hambleton offers some suggestions:

  • Make it active. Theres still a place for flip charts and PowerPoint presentations in classrooms of corporate America. But adult learning theory confirms time and again that people learn by doing. At some point, put away the flip chart and get people on their feet.
  • Make it fun. "Lets face it. Project management is a pretty dry subject," confides Hambleton. "I have the most success engaging learners when theyre having fun. That was one big reason the Countdown® simulation worked so great at Xerox. It was fun."
  • Make it practical. After engaging people in the fictional world of the learning simulation, Hambletons work is only half done. The next critical piece is connecting the experience back to the reality of daily work. How can we actually practice what weve learned? How do we actually do this in our work? If you dont tie it back, people wont ever own it.




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Quotation of the Week

"To learn to read is to light a fire; every syllable that is spelled out is a spark."
---Victor Hugo, Les Miserables
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Monday, March 9, 2015

The World’s Most Remarkable and Celebrated Same Sex Relationships in History

The World’s Most Remarkable and Celebrated Same Sex Relationships in History

Several Ancient Greeks and Romans were involved in male same-sex love. All throughout history until today, there are many people including notable leaders, rich people and famous celebrities who are involved in same sex relationships. Dionysius is regarded by the Greeks as the patron god of hermaphrodites and transvestites. Aphrodite is considered patron of homosexual love between males.

Achilles and Patroclus