Saturday, April 21, 2012

Saturday Night Watching BPL

This is a Saturday night in Indonesia. It is a BPL or Barclays Premier League night. After watching  Arsenal vs Chelsea at 7/00 PM, now I watch QPR vs Totenham Hospurs. They are not my favorite team. Because I sing Glory for United.

This night match will not affect United at all, but it is enough to make me asleep. To keep fighting for earning money by blogging, to keep thinking about my future, to keep listing what I am going to do for tomorrow, to keep thinking about her, to do some blogwalking, and so on.

I think this a long night.

Friday, April 6, 2012

Innovation Contest

This post is only an opinion about an innovation contest held in Indonesia. Like Black Innovation Award. Last year, I competed at this award and did not recognize by the jury. This is not my disappointed opinion, but a review about the award of innovation.

First, innovation is about something new that never been before. Actually, there is no pure innovation in the world. Why? Because it is only use the former knowledge to create something better. Or use the knowledge to make something useful. Or fix the former solution of some problems with a new boundary.

The BIA is held every year with thousands contestant in Indonesia. My friends and I tried to follow this contest last year. But, We lost at the first stage. Means we did not pass the preliminary stage. We just wonder why we did not pass. The contest should give a feed back to the contestant they refused. So, we do not guess what is wrong to our innovation.

Then, from the 50 contestant chosen, I think they are not inventor. There is a blog that review about the 50. You can search at Google. The point here is, the jury is not good enough. They should filter the better idea of innovation. Some of the 50 are available at department store as china's product. Are they called innovator?

BIA 2012 is held since February until May for registration now. But, I try to focus on my Final Task to get graduating after 4 years study. Actually, I want to compete again there, but I will focus more on my study. Hope there is enough time later.

For sharing here, you can the idea of innovation can be from anywhere and anytime. So, prepare for yourself when the idea comes and make it happens. Thank you.

Friday, March 30, 2012

Pray for Indonesia

Indonesia is one of big countries in Asia. As an Indonesian, I am proud of that big which means we have potential in developing with huge people in it. Someday, I will be the leader of Indonesia.

But, the condition of Indonesia is not good enough now. Tomcat, increasing of fuel price, corruption, chaos demonstration, and others. This what we are going to talk about tonight. Not we, but my opinion about my beloved country.

As Indonesian, I hope I can live peacefully here and it is my right. The chaos demonstration should not be happened in Indonesia. I was disappointed with the mass, known as MAHASISWA, doing that chaos demonstration. They speak loudly about the Indonesian people's right. But, they destroy the place where Indonesian work at. Don't they think about that? I don't think so.

Then, they make a blockade on the road. It makes the taxi drivers, Indonesian people who should be defended by them, afraid to take a costumer. Don't they think about that? I don't think so.

Another chaos at the restaurant. Same happened there. The workers are Indonesian people who should be defended by them. I don't think so that they think about it too.

So, what should they do? They should concentrate more on their study and do something to this country. Make  a company that will decrease the unemployment. Make your country be proud of you. Try to develop your country with your knowledge. Do not destroy it, stupid!

About Tomcat, I think it is just a diversion about the hot issue that is happened now especially the corruption issue of the ruling party. Tomcat is not important. So, do not make it as a headline news. 

Friday, March 23, 2012

Review: System of Information Management

Sandi Budiyono (I1308531)


Shear strength is one of the important mechanical properties of natural fiber composites. The nature of the information is very useful for research in this area. To measure the mechanical properties of this particular device must be designed taking into account the characteristics of natural fiber composites as a specimen. This study focused on the design aspects of the repeatability of test results.

Shear test methods tailored to the ASTM-D5379-98. Shear test specimens of standard geometry measuring 76mm x 20mm x 12mm (P x L x T) and there are notches 90o (V-notch) in the middle of the specimen with a depth of 4mm are combined according to the needs of Quality Control Laboratory (LSK) March Eleven University of Surakarta , this standard will be a reference to develop the design of shear test equipment. In the final stages of design, performance repeatability test equipment measured using Analysis of Variance (ANOVA) for specimens of medium density fiberboard (MDF).

The results of this study is modular shear test equipment for the natural fiber composite shear testing using a hydraulic power pack power as the prime mover. Clamping the specimen is specifically designed for natural fiber composites are generally fragile and brittle. ANOVA test showed the device was assessed both in terms of aspects of the repeatability of test results with accuracy below 5%.

Fill associated with the college Management Information System:

Based on the above TA contents, can be picked up information on the results of shear tests on natural fiber composite material according to ASTM standard D5379-98. The test results through ANOVA test showed that the repeatability of test results information has accuracy below 5%.

Development of TA can be done by the use of variations in the specimen notch angle (not just a notch 900). In addition, the shape of the notch of the V-notch can be varied with the other forms, such as the U-shape, double V-notch, and so forth. Development of tools to be much better if the tool can also display data drawn directly in chart form, complete the information value of the data record.

Thursday, February 23, 2012

Review of Managemeng Information System



Rangga Romadhan (I1305011)
Unnatural working posture in manual material handling activities are affected by the mismatch between employment facilities to its use, so the impact on work accidents, especially the working posture and work load. It is this factor that occurs in the activity of transport workers' unions in Pasar Gede Surakarta. On actual conditions, especially the manual material handling activities by workers in Pasar Gede transport workers on average 55 kg without using the tools of the appointment. According to the National Occupational Health and Safety Commission which recommended the appointment of the normal range of 34-50 kg without using tools, lifting over 50 kg is recommended to use the tool (Suhardi et al, 2008).
In this study, several steps will be done using different methods. Phase First Instance nordic questionnaires body map, used to identify the causes of musculoskeletal complaints. The second stage of the calculation methods of working posture Rapid Entire Body Assessment (REBA). The third stage of labor physiology calculations using the energy expenditure and energy cost objective to determine the level of workload and calculate the energy expended by the worker. The fourth stage of work on designing a tool to use anthropometric methods to determine the dimensions of work handtruck designed and obtain results in ergonomic design.
Handtruck design as a tool of work has been tested against 24 labor unions of transport workers' sample. The trial results according to the calculation method of REBA, a decline in the level of risk of musculoskeletal injury. This can be evidenced on the activity of loading and transport, down to the level of risk 2 (moderate). For unloading activity, dropped to the level of risk 2 (moderate). According to calculations by the method of work physiology energy expenditure decreased levels of workload. This is evidenced sixteen respondents classified as light work category, eight respondents classified as moderate work. Handtruck design as a tool for working ergonomically designed handle with the addition of facilities and the use of three wheels wheels to accommodate the needs of transport workers' unions.

Fill in Management Information Systems related courses:

Based on the above TA content, it can be information about the causes of musculoskeletal complaints. Information about it can be seen on the results of analyzes using the nordic body map. In addition, the TA was delivered by processing information about the risk level of work postures REBA method. Information on the rate of decline in the risk level loading-unloading of each reduced by one level. In addition, communicated information about the energy needs of workers to perform their activities. The data obtained through the calculation of energy expenditure, then the results can be compared with each other through the stu energy cost calculations.
The development of TA can be done by designing products specifically for women workers. Of course the data is the data used anthropometric women. Leih then to determine the level of the design needs a tool that is really needed, can use methods of Quality Function Deployment (QFD).

Friday, February 3, 2012

Review of Paper: VegaDLib: A Service-Oriented Platform for Building Digital Libraries

Title           : VegaDLib: A Service-Oriented Platform for Building Digital Libraries
Authors     : Ke Li, Haozhi Liu, Haiyan Yu
Content     :

Today many are made with the digital library concept based solution in which the concept approach has one drawback, namely the data are not used to the new system and more specific. This is a basic idea of ​​the development of service oriented systems digilib platform known as VegaDLib. With the development of a new concept, then the user can build their own libraries with cost and small businesses.Dissertations consists of three main components, namely content (resources), core system (management and operation of user and administrator), and the user interface (user and system interaction). Service-oriented architecture (SOA) is an approach to the integration of heterogeneous systems where for system platform, various power sources can be collected as a web service to enhance the operation of the components in it.VegaDLib based on the general model and made some extensions.VegaDLib motivation is to create a common platform that is easily installed on different systems. These systems are heterogeneous operating systems, databases and other metadata specifications.SOA consists of three main parts, namely a model layer, control layer, and the view layer. The model layer is the database structure of the system with one element of a record (actual metadata from resources). The model layer is the basis of development control layer and view layer. Control layer is the basic functionality of the system consisting of four different functional modules that use the classification of the model layer. Kempat module is record and catalog management, and service index searching, browsing and data services provider, and the administration that includes the service admin. View layer is a composition of three modules that include user-side utility web services client, server-side process modules, and web portal. This layer is responsible for users and core systems, efficiency, Reliability of, and security interactions.SOA implementations in the digital library is as follows, to manage the service (service record) who is in control layers have two functions set the record and provide the facility to set the record. In the catalog service is used to catalog the metadata (list books, etc.) but, to catalog the existing record. Record in question is a record that is in the record factory. Catalog service is used to store records that may have been deleted can be restored again. Index service is very useful in the library system. With index users can search data easily and quickly. Index is also used as a marker in the metadata. For example, the form of power point metadata, document, pdf etc will diindexkan differently according to the type of existing metadata. Next is a search service, search service is related to the index service. Search service is always looking index that was created in the index service. Results are displayed by the search service is the result of having a degree of similarity and a high level of access to low-level access.The data service provider is used combine multiple data from various sources and creates an index on that data. Example is the data collected in aggregate and index created for the user, making it easier when searching for global secar. Admin service needed to manage existing data. Admin bertuga to start or stop the system. Admin can also serve mengauthorisasi that the data can be accessed by other users at different levels of service.A user interface that can be used is a web portal. Where now can be accessed anywhere at anytime and with beberbagai gadget options. In accessing the metadata contained in digital libraries needs to be distinguished storage area index and also the original metadata. Because not everyone can access the metadata of the original, because it feared the tone aka people who are not responsible to remove the existing metadata in the metadata.Features available in the following VegaDlib, kemudalah in installation, maintenance and use. Users can easily set sesusai needs. The system is quite stable and can be used in a variety of platforms. It is possible an exchange of data between the database instance to the original database.

Sunday, January 22, 2012

Background of making Handle, lock and pump impeller with Using Oil Sand Mold Casting Process

Oil pump is usually made using cast iron. This makes the oil pump to be heavy. Oil pump has a function to suck fluid from a container and pull it out. Oil pump consists of several components, including the impeller, the pump house, pump house close, pipes in, pipes out, stalk player (handle), lock the drum, bolt and seal.

In the market, the oil pump is sold as a whole, so if there is damage to one part only, the pump does not work anymore, and consumers are forced to buy a new pump.Therefore, the producers began trying to separate the oil pump on the manufacture of components.

At first, the manufacture of the components of the oil pump is made with cast iron materials. However, the manufacture of components of the oil pump has the disadvantage that it felt brittle, so easy to crack if exposed to impact. Departing from the above facts, it is necessary to study other metals can be used other than cast iron.

Research is underway to make the component parts of the oil pump using sand molds, while to replace cast iron materials with lighter material, selected aluminum alloys. In addition to aluminum, the metals can be used in a sand mold casting process include iron, steel, copper, bronze, brass or metal alloy. The reason is to cover the replacement of material weaknesses in the manufacture of the oil pump components of cast iron, which is brittle.

Part of the oil pump to be made in this study is the handle, lock and impellers. Handle is a function of oil pump impeller rotating components within the pump house. This handle must have enough power for rotating the handle at the moment due to tensile stress arising from the labor of human hands. While the pump impeller is part of the house that can rotate due to rotation of the handle. The impeller shall be resistant to corrosion.While the lock is a component of the oil pump which serves to hold the pipe that goes into the drum can not move, making it easier for the rotating handle.

The process of making the above components using the sand casting process. Excess of the sand mold casting method is a relatively inexpensive cost compared to the method of cast iron, which is also relatively easy operation, can make even complex components, and can make a large size components.

Saturday, January 7, 2012

The corners of the chisel that affect the cutting force and surface smoothness

Discussion 1

The corners of the chisel that affect the cutting force is:
A. Free orthogonal angle (α0)
Free angle function is to reduce friction between the main field (Aα) with the transient field of the workpiece. The price of free elections angle determined by the type of the workpiece and cutting conditions. Ate motion (f) will determine the price point free. The greater the motion of eating the cutting force will be greater

2. Growled orthogonal angle (γ0)
Angle affects the formation of furious anger. For a given cutting speed, large angle furious compression ratio will decrease resulting in a thick angry γh increase shear angle Φ. Large shear angle Φ will decrease the cross-cutting shear Ashi so the style will go down. To reduce the large cutting force resulting from the use of negative angle so furiously cutting speeds should be high (in order to decrease the strength of the workpiece).

3. Torsional angle
Because the torsional angle equal to the angle on the outer side growled then the function will be similar to a chisel point on the lathe furious, furious that affect the formation process. The larger the twist angle will mrnurunkan style that cuts torque and compression force will decline.

The corners of the chisel that affect the smoothness of the surface is:

A. Corner radius (re)
Radius corner serves to strengthen the cut end of the meeting between the eyes with the eye's main minor cut S 'and in addition determine the smoothness of the surface of the cutting .. Machining the surface smoothness is determined by the formula:
Rt = (Cr f2) / 8re;
Rt = total roughness of the surface roughness parameter (μm)
motion f = feed (mm / r)
re = radius corner (mm)
Cr = conversion factor, depending on the nature ketermesinan workpiece, cutting conditions are selected (cutting speed) and the stiffness of the cutting system;
Kaku = 2000
Medium = 2300
Weak = 3000

The formula above states that the greater the corner radius is chosen then the smoothness of the surface may be enhanced.

2. Oblique angle
When the oblique angle value 0, then the furious flow perpendicular to the eye piece.Would make a furious stream of ρc angle to the line perpendicular to the eye piece and according to Stabler furious flow angle is approximately equal to the oblique angle λs.Given the oblique angle, the length of contact between the cutting tool with the workpiece to be more extended and specific cutting energy Esp will not change until reaching 20o oblique angle. The temperature of the contact area will reach a minimum price when λs + 5o valuable for refining process (finishing) and-5o in the hardening process (roughing).

3. Corner of the Bantu (k'r)
Orientation and the auxiliary field A'α cut against the surface of the workpiece has been cut off aid is determined by the angle cut and angle k'r α'o minor. If the minor α'o free angle is large enough to reduce friction, in principle, the corner pieces as small as possible aids k'r chosen because in addition to strengthening the chisel edge (tip angle is enlarged), the fineness of the product can be enhanced, which is a constraint is the stiffness of the workpiece cutting systems, because of the small corner pieces will enhance the force Fx radians as general pointer cutting the rigid system k'f = 5o - 10o and cutting systems are weak, k'f = 10o - 20o to the corner radius r is small, the surface smoothness parameter Rt ( total roughness) were determined simultaneously by k'f, kf and as the following formula:
Rt = fc / (kr + cot cot k'r)
Rt = total hardness (μm)
The main pieces of Kf = angle (o)
K'f = corner cut aid (o)
F = feed motion (mm / r)

C = conversion factor> 1000, depending on the nature of the workpiece ketermesinan terms of surface roughness and cutting conditions (cutting speed).

Discussion 2

Problem 1
A shaft of steel material AISI 1020 (200 BHN) has a cutting speed rpm ......
Initial diameter (d0) = 2 in
Final diameter (d1) = 1.9 in
Rotary speed (S)?
Large spindle rotation speed can be obtained by using the formula below:
A. For inch size
   Df S = π (rpm) / 12
2. For metric sizes
Df S = π (rpm) / 1000
We chose the first formula, as is known in the matter of using units of inches.
df = (d0 + d1) / 2
    = (2 + 1.9) / 2
    = 3.9 / 2
    = 1.95 in
Df S = π (rpm) / 12
   = (3.14) (1.95) (20) / 12
   = 122.46 / 12
   = 10.205 sfpm (surface feet per minute)

Df S = π (rpm) / 12
   = (3.14) (1.95) (176.38) / 12
   = 1079.97 / 12
   = 89.99 sfpm (surface feet per minute)

Problem 2
Cutting length (L) = 4 in
Ingestion (S) = 0.001 in / round
Cutting time (T)?
Cutting the time can be obtained by using the formula below:
A. For inch size
T = π df L / (12 FS)
2. For metric sizes
           T = π df L / (1000 FS)
We chose the first formula, as is known in the matter of using units of inches.
T = π df L / (12 FS)
    = (3.14) (1.95) (4) / (12) (0.001) (10.205)
    = 24.492 / 0.12246
   = 200 min